SMPS control drivers Rev. September 2008 Product data sheet

The Datasheet Archive - 100 Million Datasheets from 7500 Manufacturers.

SMPS control drivers Rev. September 2008 Product data sheet

Datasheet Thumbnail

Top Searches for this datasheet

SSL1750
SMPS control drivers
Rev. September 2008 Product data sheet
SSL1750 Switched Mode Power Supply (SMPS) controller suitable driving applications from power requirements below SSL152x family SSL1623PH best choice. SSL1750 combines controller Power Factor Correction (PFC) flyback controller. high level integration allows design cost-effective power supply with very number external components. special built-in green functions provide high efficiency power levels. This applies quasi-resonant operation high power levels, quasi-resonant operation with valley skipping, well reduced frequency operation lower power levels. power levels, switches over burst mode control maintain high efficiency. burst mode, soft-start soft-stop functions added eliminate audible noise. During power conditions, flyback controller switches frequency reduction mode limits peak current maximum value. This will ensure high efficiency power while minimizing audible noise from transformer. proprietary high voltage BCD800 process makes direct start-up possible from rectified universal mains voltage effective green way. second voltage Silicon Insulator (SOI) used accurate, high speed protection functions control. SSL1750 enables highly efficient reliable drivers with power requirements designed easily with minimum number external components.
Features
Distinctive features
Integrated flyback controller Universal mains supply operation (AC)) High level integration resulting very external component count cost effective design
Green features
On-chip start-up current source
green features
Valley/zero voltage switching minimum switching losses (patented)
Semiconductors
SSL1750
SMPS control drivers
Frequency limitation reduce switching losses Burst mode operation load detected flyback output (patented)
Flyback green features
Valley switching minimum switching losses (patented) Frequency reduction with fixed minimum peak current power operation maintain high efficiency output power levels
Protection features
Safe restart mode system fault conditions Continuous mode protection means demagnetization detection both converters (patented) Undervoltage protection (foldback during overload) Accurate OverVoltage Protection (OVP) both converters (adjustable flyback converter) Open control loop protection both converters overtemperature protection adjustable OverCurrent Protection (OCP) trip level both converters Soft-(re)start both converters Soft-stop minimize audible noise Mains undervoltage protection brownout protection General purpose input latched protection, e.g. used system OverTemperature Protection (OTP)
Applications
device used applications that require efficient cost-effective power supply solution applications SSL1750 are:
Indoor applications
Spot lights Down lights Other consumer/industrial fixtures
Outdoor applications
Street lighting Area lighting (e.g. parking) Tunnel lighting
SSL1750_1
B.V. 2008. rights reserved.
Product data sheet
Rev. September 2008
Semiconductors
SSL1750
SMPS control drivers
Ordering information
Table Ordering information Package Name SSL1750T SO16 Description plastic small outline package; leads; body width Version SOT109-1 Type number
Block diagram
PFCDRIVER DRIVER
1.12
FBDRIVER DRIVER GATE PROT
1.25
GATE
LATCH
LATCH RESET
1.25
VINSENSE
PFCCOMP
PROT PROT ENABLE
PROT ENABLEFB FREQ RED. POWER TIME
FBCTRL
VOSENSE
2.50
LOWVIN PROT
GOOD VoSTART POWER PROT PROT OvpFB LATCH RESET VoSHORT TIMEOUT VUVLO PROT PROT VSTART VUVLO
SMPS CONTROL LATCHED PROTECTION SAFE RESTART PROTECTION
VoOVP VoBURST HIGH VoBURST VoSTART VoSHORT
STARTFB START STOP
DRIVER
BLANK
PROT ENABLE START GOOD START SOFT
FBSENSE
BLANK DRIVER ENABLE SOFT START SOFT STOP START STOP VoBURST VoBURST HIGH TIMER VALLEY DETECT PFCGATE
PFCSENSE
CHARGE CONTROL CHARGE VALLEY DETECT OvpFB COUNTER GATE FBAUX
INTERNAL SUPPLY VSTART TEMP
PFCAUX
CHANGE
TIMER
-100
VUVLO
014aaa055
Block diagram
SSL1750_1
B.V. 2008. rights reserved.
Product data sheet
Rev. September 2008
Semiconductors
SSL1750
SMPS control drivers
Pinning information
Pinning
FBCTRL FBAUX LATCH PFCCOMP VINSENSE PFCAUX
014aaa349
FBDRIVER PFCDRIVER PFCSENSE FBSENSE VOSENSE
SSL1750T
configuration SSL1750T (SOT109-1)
description
Table Symbol FBCTRL FBAUX LATCH PFCCOMP VINSENSE PFCAUX VOSENSE FBSENSE PFCSENSE PFCDRIVER FBDRIVER description Description supply voltage ground control input flyback input from auxiliary winding demagnetization timing overvoltage protection flyback general purpose protection input frequency compensation sense input mains voltage input from auxiliary winding demagnetization timing sense input output voltage programmable current sense input flyback programmable current sense input gate driver output gate driver output flyback high voltage safety spacer, connected high voltage safety spacer, connected high voltage start-up valley sensing flyback part
SSL1750_1
B.V. 2008. rights reserved.
Product data sheet
Rev. September 2008
Semiconductors
SSL1750
SMPS control drivers
Functional description
General control
SSL1750 contains controller power factor correction circuit well controller flyback circuit. SSL1750 driver used current source drive LEDs directly, shown Figure SSL1750 also used typical AC/DC converter drive multiple DC/DC drivers shown Figure
SSL1750T
014aaa561
Application circuit
SSL1750_1
B.V. 2008. rights reserved.
Product data sheet
Rev. September 2008
Semiconductors
SSL1750
SMPS control drivers
SSL1750T
014aaa350
Typical configuration SSL1750
7.1.1 Start-up undervoltage lockout
Initially capacitor charged from high voltage mains long below Vtrip, charge current low. This protects case shorted ground. short start-up time charge current above Vtrip increased until reaches Vth(UVLO). between Vth(UVLO) Vstartup, charge current again, ensuring duty cycle during fault conditions. control logic activates internal circuitry switches charge current when voltage passes Vstartup level. First, output LATCH activated soft-start capacitors pins PFCSENSE FBSENSE charged. When voltage LATCH exceeds Ven(LATCH) voltage soft-start capacitor PFCSENSE charged, circuit activated. supply current from then switched again circuit charges Cbus capacitor. When voltage VOSENSE reaches Vstart(fb) level, charge current switched flyback converter activated (providing soft-start capacitor FBSENSE charged). output voltage flyback converter then regulated nominal output voltage. supply taken over auxiliary winding flyback converter. Figure When started, there initially supply takeover from auxiliary winding. make small capacitor possible, voltage regulated Vstartup level, long flyback converter started. Regulation done hysteretic control with limited (high level) charge current. hysteresis typically during start-up LATCH does reach Ven(LATCH) level before reaches Vth(UVLO), output deactivated charge current switched again.
SSL1750_1
B.V. 2008. rights reserved.
Product data sheet
Rev. September 2008
Semiconductors
SSL1750
SMPS control drivers
soon flyback converter started, voltage FBCTRL monitored. output voltage flyback converter does reach intended regulation level predefined time, voltage FBCTRL reaches Vto(FBCTRL) level error assumed. SSL1750 then initiates safe restart. When protection functions activated, both converters stop switching voltage drops Vth(UVLO). latched protection recharges capacitor does restart converters. safe restart protection, capacitor recharged device restarts (see Figure event overvoltage protection circuit VOSENSE Vovp(VOSENSE)), only controller stops switching until voltage VOSENSE drops below Vovp(VOSENSE) again. Also, mains undervoltage detected VINSENSE Vstop(VINSENSE)), only controller stops switching until VINSENSE Vstart(VINSENSE) again. When voltage drops below undervoltage lockout level, both controllers stop switching reenter safe restart mode. safe restart mode driver outputs disabled voltage recharged
SSL1750_1
B.V. 2008. rights reserved.
Product data sheet
Rev. September 2008
Semiconductors
SSL1750
SMPS control drivers
Vstartup Vth(UVLO) Vtrip
Vstart(VINSENSE) VINSENSE
LATCH PROTECTION
Ven(LATCH)
soft start
PFCSENSE
PFCDRIVER
soft start
FBSENSE
FBDRIVER Vto(FBCTRL) FBCTRL
Vstart(fb) VOSENSE Vout CHARGING STARTING NORMAL PROTECTION CAPACITOR CONVERTERS OPERATION RESTART
014aaa060
Start-up sequence, normal operation, restart sequence
7.1.2 Supply management
internal reference voltages derived from temperature compensated trimmed on-chip band circuit. Internal reference currents derived from temperature compensated trimmed on-chip current reference circuit.
7.1.3 Latch input
LATCH general purpose input pin, which used switch both converters. sources current, IO(LATCH) LATCH (typical µA). Switching both converters stopped soon voltage this drops below 1.25 initial start-up switching inhibited until voltage LATCH above 1.35 (typ). internal filtering done this pin. internal Zener clamp (typ) protects this from excessive voltages.
SSL1750_1 B.V. 2008. rights reserved.
Product data sheet
Rev. September 2008
Semiconductors
SSL1750
SMPS control drivers
7.1.4 Fast latch reset
typical application, mains interrupted briefly reset latched protection. capacitor, Cbus, does have discharge this latched protection reset. Typically, capacitor, Cbus, discharge drop this reset level. When latched protection set, clamping circuit VINSENSE circuit disabled (see also Section 7.2.8). soon VINSENSE voltage drops below (typ) then raised (typ), latched protection reset. latched protection will also reset removing both voltage
7.1.5 Overtemperature protection (OTP)
accurate internal temperature protection provided circuit. When junction temperature exceeds thermal shutdown temperature, only stops switching. long active, capacitor recharged from mains. circuit supplied from supply voltage sufficient. latched protection. reset removing both voltage fast latch reset function, Section 7.1.4.
Power factor correction circuit
power factor correction circuit operates quasi-resonant discontinuous conduction mode with valley switching. next primary stroke only started when previous secondary stroke ended voltage across MOSFET reached minimum value. voltage PFCAUX used detect transformer demagnetization minimum voltage across external MOSFET switch.
7.2.1 control
power factor correction circuit operated control. resulting mains harmonic reduction typical application well within class-D requirements.
7.2.2 Valley switching demagnetization (pin PFCAUX)
MOSFET switched after transformer demagnetized. Internal circuitry connected PFCAUX detects secondary stroke. also detects voltage across MOSFET. next stroke started voltage across MOSFET minimum order reduce switching losses ElectroMagnetic Interference (EMI) (valley switching). demagnetization signal detected PFCAUX, controller generates Zero Current Signal (ZCS), (typ) after last gate signal. valley signal detected PFCAUX, controller generates valley signal (typ) after demagnetization detected. protect internal circuitry, example during lightning events, advisable series resistor this pin. prevent incorrect switching external disturbance, resistor should placed close printed-circuit board.
SSL1750_1
B.V. 2008. rights reserved.
Product data sheet
Rev. September 2008
Semiconductors
SSL1750
SMPS control drivers
applications with high transformer ringing frequencies (after secondary stroke), PFCAUX should connected capacitor resistor auxiliary winding. diode must then placed from ground connection PFCAUX.
7.2.3 Frequency limitation
optimize transformer minimize switching losses, switching frequency limited fsw(PFC)max. frequency quasi-resonant operation above fsw(PFC)max limit, system switches over discontinuous conduction mode. Also here, MOSFET only switched minimum voltage across switch (valley switching).
7.2.4 Mains voltage compensation (pin VINSENSE)
mathematical equation transfer function power factor corrector contains square mains input voltage. typical application this results bandwidth mains input voltages, while high mains input voltages Mains Harmonic Reduction (MHR) requirements hard meet. compensate mains input voltage influence, SSL1750 contains correction circuit. VINSENSE average input voltage measured information internal compensation circuit. With this compensation possible keep regulation loop bandwidth constant over full mains input range, yielding fast transient response load steps, while still complying with class-D requirements. typical application, bandwidth regulation loop resistor capacitors PFCCOMP.
7.2.5 Soft start-up (pin PFCSENSE)
prevent audible transformer noise start-up during hiccup, transformer peak current, IDM, increased slowly soft-start function. This achieved inserting RSS1 CSS1 between PFCSENSE current sense resistor RSENSE1. internal current source charges capacitor VPFCSENSE Istart(soft)PFC RSS1. voltage limited Vstart(soft)PFC. start level time constant increasing primary current level adjusted externally changing values RSS1 CSS1. Equation SoftStart
charging current Istart(soft)PFC flows long voltage PFCSENSE below (typ). voltage PFCSENSE exceeds soft-start current source starts limiting current Istart(soft)PFC. soon starts switching, Istart(soft)PFC current source switched off, Figure
SSL1750_1
B.V. 2008. rights reserved.
Product data sheet
Rev. September 2008
Semiconductors
SSL1750
SMPS control drivers
Istart(soft)PFC
SOFT START SOFT STOP CONTROL
RSS1
PFCSENSE
CSS1 RSENSE1
014aaa018
Soft start-up soft-stop
7.2.6 Burst mode control
When output power flyback converter (see Section 7.3) low, flyback converter switches over frequency reduction mode. When frequency reduction mode entered flyback controller, power factor correction circuit switches burst mode control. burst mode control, switching power factor correction circuit inhibited until voltage VOSENSE dropped Vburst(L). Switching then restarts with soft-start avoid audible noise (see Section 7.2.5). soon voltage VOSENSE reaches Vburst(H) soft-stop circuit activated, again avoid audible noise. During soft-stop time output voltage power factor correction circuit overshoots, depending soft-start resistor capacitor, RSS1 CSS1 PFCSENSE. Vburst(H) voltage well below Vreg(VOSENSE) voltage, output voltage does reach normal operation output voltage power factor correction circuit typical application this overshoot. burst mode repetition rate defined output power value capacitor, Cbus. During burst mode operation PFCCOMP clamped between voltage (typ) (typ). lower clamp voltage limits maximum power that delivered during burst mode operation yields more sinusoidal input current during burst pulse. upper clamp voltage ensures that return normal regulation point limited amount time when returning from burst mode. soon flyback converter leaves frequency reduction mode, power factor correction circuit restores normal operation. prevent continuous switching circuit, small hysteresis been built (typ) FBCTRL).
SSL1750_1
B.V. 2008. rights reserved.
Product data sheet
Rev. September 2008
Semiconductors
SSL1750
SMPS control drivers
Vburst(H)
VVOSENSE
Vburst(L)
envelop peak current
soft-start
control
soft-stop
014aaa019
Burst mode control
7.2.7 Overcurrent protection (pin PFCSENSE)
maximum peak current limited cycle-by-cycle sensing voltage across external sense resistor (RSENSE1) source external MOSFET. voltage measured PFCSENSE.
7.2.8 Mains undervoltage lockout brownout protection (pin VINSENSE)
prevent from operating very mains input voltages, voltage VINSENSE sensed continuously. soon voltage this drops below Vstop(VINSENSE) level, switching stopped. mains situation continues, voltage eventually drops. voltage VOSENSE then drops below Vstart(fb) level flyback converter also disabled. voltage VINSENSE clamped minimum value, (Vstart(VINSENSE) Vpu(VINSENSE), fast restart soon mains input voltage restored after mains dropout.
7.2.9 Overvoltage protection (pin VOSENSE)
overvoltage protection circuit been built prevent output overvoltage during load steps mains transients. soon voltage VOSENSE exceeds Vovp(VOSENSE) level, switching power factor correction circuit inhibited. Switching recommences soon voltage VOSENSE voltage drops below Vovp(VOSENSE) level again. When resistor between VOSENSE ground open, overvoltage protection also triggered.
7.2.10 open loop protection (pin VOSENSE)
power factor correction circuit does start switching until voltage VOSENSE above Vth(ol)(VOSENSE) level. This protects circuit from open loop VOSENSE short situations. VOSENSE draws small input current, switching also inhibited when left open.
SSL1750_1
B.V. 2008. rights reserved.
Product data sheet
Rev. September 2008
Semiconductors
SSL1750
SMPS control drivers
7.2.11 Driver (pin PFCDRIVER)
driver circuit gate power MOSFET current sourcing capability typically current sink capability typically This permits fast turn-on turn-off power MOSFET efficient operation.
Flyback controller
SSL1750 includes controller flyback converter. flyback converter operates quasi-resonant discontinuous conduction mode with valley switching. auxiliary winding flyback transformer provides demagnetization detection powers after start-up.
7.3.1 Multimode operation
SSL1750 flyback controller operate various modes, Figure
fsw(fb)max
burst mode
frequency reduction
switching frequency
discontinuous with valley switching
quasi resonant
output power
014aaa025
Multimode operation flyback
high output power converter switches quasi-resonant mode. next converter stroke started after demagnetization transformer current. quasi-resonant mode switching losses minimized converter only switches when voltage across external MOSFET minimum (valley switching, also Section 7.3.2). prevent high frequency operation lower loads, quasi-resonant operation changes discontinuous mode operation with valley skipping which switching frequency limited fsw(fb)(max) (125 typ). Again, external MOSFET only switched when voltage across MOSFET minimum. very power standby levels frequency controlled down Voltage Controlled Oscillator (VCO). minimum frequency reduced zero. During frequency reduction mode, primary peak current kept minimal level Ipkmax/4 maintain high efficiency. (Ipkmax maximum primary peak current sense resistor maximum sense voltage.) primary peak current frequency reduction mode operation (Ipk Ipkmax/4), audible noise noticeable switching frequencies audible range. Valley switching also active this mode.
SSL1750_1
B.V. 2008. rights reserved.
Product data sheet
Rev. September 2008
Semiconductors
SSL1750
SMPS control drivers
frequency reduction mode controller switched burst mode operation flyback maximum frequency changes linearly with control voltage FBCTRL (see Figure stable on-off switching burst mode FBCTRL (typ) hysteresis. load operation switching frequency flyback reduced (almost) zero.
fsw(fb)max
burst mode
frequency reduction
switching frequency
discontinuous with valley switching
quasi resonant
VFBCTRL
014aaa026
Frequency control flyback part
7.3.2 Valley switching (pin
Figure cycle starts when external MOSFET activated. After on-time (determined FBSENSE voltage FBCTRL voltage), MOSFET switched secondary stroke starts. After secondary stroke, drain voltage shows oscillation with frequency approximately, Equation where primary self-inductance flyback transformer capacitance drain node. soon internal oscillator voltage high again secondary stroke ended, circuit waits lowest drain voltage before starting primary stroke. Figure shows drain voltage, valley signal, secondary stroke signal, internal oscillator signal. Valley switching allows high frequency operation capacitive switching losses reduced, Equation High frequency operation makes small cost-effective magnetics possible.
SSL1750_1
B.V. 2008. rights reserved.
Product data sheet
Rev. September 2008
Semiconductors
SSL1750
SMPS control drivers
primary stroke
secondary stroke
secondary ringing
drain
valley
secondary stroke
oscillator
014aaa027
Start cycle lowest drain voltage. Start cycle classical Pulse Width Modulation (PWM) system without valley detection.
Signals valley switching
7.3.3 Current mode control (pin FBSENSE)
Current mode control used flyback converter good line regulation. primary current sensed FBSENSE across external resistor compared with internal control voltage.The internal control voltage proportional voltage FBCTRL.
SSL1750_1
B.V. 2008. rights reserved.
Product data sheet
Rev. September 2008
Semiconductors
SSL1750
SMPS control drivers
Vsense(fb)max 0.52 burst mode flyback frequency reduction flyback discontinuous flyback cycle skip mode 0.13
FBSENSE peak voltage
VFBCTRL
014aaa028
Frequency control flyback part
driver output latched logic, preventing multiple switch-on.
7.3.4 Demagnetization (pin FBAUX)
system always quasi-resonant discontinuous conduction mode. internal oscillator does start primary stroke until previous secondary stroke ended. Demagnetization features cycle-by-cycle output short circuit protection immediately lowering frequency (longer off-time), thereby reducing power level. Demagnetization recognition suppressed during first tsup(xfmr_ring) time typ). This suppression necessary output voltages start-up applications where transformer large leakage inductance. FBAUX open-circuit connected, fault condition assumed converter stops operating immediately. Operation restarts soon fault condition removed.
7.3.5 Flyback control time-out (pin FBCTRL)
FBCTRL connected internal voltage source internal resistor (typical resistance soon voltage this above (typ), this connection disabled. Above biased with small current. When voltage this rises above (typ), fault assumed switching inhibited. When small capacitor connected this pin, time-out function created protect against open control loop situation (see Figure Figure 13). time-out function disabled connecting resistor (100 ground FBCTRL. shorted ground, switching flyback controller inhibited. normal operating conditions, when converter regulating output, voltage FBCTRL between (typical values) from minimum maximum output power.
SSL1750_1 B.V. 2008. rights reserved.
Product data sheet
Rev. September 2008
Semiconductors
SSL1750
SMPS control drivers
TIMEOUT
FBCTRL
014aaa049
Circuit diagram
VFBCTRL
output voltage intended output voltage reached within time-out time. restart intended output voltage reached within time-out time.
014aaa050
Timing diagram Time-out protection
7.3.6 Soft start-up (pin FBSENSE)
prevent audible transformer noise during start-up, transformer peak current, slowly increased soft-start function. This achieved inserting resistor capacitor between FBSENSE current sense resistor. internal current source charges capacitor Istart(soft)(fb) RSS2, with maximum approximately start level time constant increasing primary current level adjusted externally changing values RSS2 CSS2. Equation SoftStart
soft start current Istart(soft)(fb) switched soon reaches Vstartup. When voltage VOSENSE reaches Vstart(fb) level voltage FBSENSE reached flyback converter starts switching. soft-start current flows long voltage FBSENSE below approximately voltage FBSENSE exceeds soft-start current source starts limiting current. After flyback converter started, soft-start current source switched off.
SSL1750_1 B.V. 2008. rights reserved.
Product data sheet
Rev. September 2008
Semiconductors
SSL1750
SMPS control drivers
Istart(soft)fb
SOFT START CONTROL
RSS2
FBSENSE
CSS2 RSENSE2
014aaa020
Soft start-up flyback
7.3.7 Maximum on-time
flyback controller limits `on-time' external MOSFET (typ). When `on-time' longer than stops switching enters safe restart mode.
7.3.8 Overvoltage protection (pin FBAUX)
output overvoltage protection implemented this This works SSL1750 sensing auxiliary voltage current flowing into FBAUX during secondary stroke. auxiliary winding voltage well-defined replica output voltage. Voltage spikes averaged internal filter. output voltage exceeds trip level, internal counter starts counting subsequent events. counter been added prevent incorrect detection which might occur during ElectroStatic Discharge (ESD) lightning events. output voltage exceeds trip level times again subsequent cycle, internal counter counts down twice speed uses when counting However, when typically cycles subsequent events detected, assumes true circuit switches power MOSFET off. protection latched, converter only restarts after internal latch reset. typical application mains should interrupted reset internal latch. output voltage Vovp(FBAUX) which function trips, demagnetization resistor, RFBAUX. Equation FBAUX FBAUX clamp FBAUX
where number secondary turns Naux number auxiliary turns transformer. Current Iovp(FBAUX) internally trimmed. value RFBAUX adjusted turns ratio transformer, thus making accurate detection possible.
SSL1750_1
B.V. 2008. rights reserved.
Product data sheet
Rev. September 2008
Semiconductors
SSL1750
SMPS control drivers
7.3.9 Overcurrent protection (pin FBSENSE)
primary peak current transformer measured accurately cycle-by-cycle using external sense resistor RSENSE2. circuit limits voltage FBSENSE internal level (see also Section 7.3.3). detection suppressed during leading edge blanking period, tleb, prevent false triggering caused switch-on spikes.
(tleb) LEVEL
VFBSENSE
014aaa022
leading edge blanking
7.3.10 Driver (pin FBDRIVER)
driver circuit gate external power MOSFET current sourcing capability typically current sink capability typically This permits fast turn-on turn-off power MOSFET efficient operation.
Limiting values
Table Limiting values accordance with Absolute Maximum Rating System (IEC 60134). Symbol Voltages VLATCH VFBCTRL VPFCCOMP VVINSENSE VVOSENSE VPFCAUX VFBSENSE supply voltage voltage LATCH voltage FBCTRL voltage PFCCOMP voltage VINSENSE voltage VOSENSE voltage PFCAUX voltage FBSENSE current limited current limited current limited -0.4 -0.4 -0.4 -0.4 -0.4 -0.4 -0.4 -0.4 -0.4 +650 Parameter Conditions Unit
VPFCSENSE voltage PFCSENSE Currents IFBCTRL IFBAUX IPFCSENSE current FBCTRL current FBAUX current PFCSENSE voltage
SSL1750_1
B.V. 2008. rights reserved.
Product data sheet
Rev. September 2008
Semiconductors
SSL1750
SMPS control drivers
Table Limiting values .continued accordance with Absolute Maximum Rating System (IEC 60134). Symbol IFBSENSE IFBDRIVER Parameter current FBSENSE current FBDRIVER duty cycle duty cycle Conditions -0.8 -0.8 Tamb class human body model pins (HV) machine model charged device model
+150 +150
Unit
IPFCDRIVER current PFCDRIVER General Ptot Tstg VESD electrostatic discharge voltage total power dissipation storage temperature junction temperature current
2000 1500
Equivalent discharging capacitor through series resistor. Equivalent discharging capacitor through 0.75 coil resistor.
Thermal characteristics
Table Symbol Rth(j-a) Thermal characteristics Parameter thermal resistance from junction ambient Conditions free air; JEDEC test board Unit
Characteristics
Table Characteristics Measurement data valid Tamb voltages measured with respect ground (pin currents positive when flowing into unless otherwise specified. Symbol Parameter current Conditions Vtrip; Vth(UVLO) Vstartup Vtrip Vth(UVLO) with auxiliary supply
SSL1750_1
Unit
Start-up current source (pin
breakdown voltage
B.V. 2008. rights reserved.
Product data sheet
Rev. September 2008
Semiconductors
SSL1750
SMPS control drivers
Table Characteristics .continued Measurement data valid Tamb voltages measured with respect ground (pin currents positive when flowing into unless otherwise specified. Symbol Vtrip Vstartup Vth(UVLO) Vstart(hys) Vhys Ich(low) Ich(high) ICC(oper) Parameter trip voltage start-up voltage undervoltage lockout threshold voltage hysteresis start voltage hysteresis voltage charging current high charging current operating supply current during start-up phase Vstartup Vth(UVLO) Vtrip Vth(UVLO) Vstartup Vtrip Vth(UVLO) load FBDRIVER PFCDRIVER Conditions 0.55 -1.2 -6.3 2.25 0.65 -5.4 0.75 -0.8 -4.6 3.75 Unit Supply voltage management (pin VCC)
Input voltage sensing (pin VINSENSE) Vstop(VINSENSE) Vstart(VINSENSE) Vpu(VINSENSE) Ipu(VINSENSE) Vmvc(VINSENSE)max stop voltage VINSENSE start voltage VINSENSE pull-up voltage difference active after Vstop(VINSENSE) VINSENSE detected pull-up current VINSENSE maximum mains voltage compensation voltage VINSENSE fast latch reset voltage hysteresis fast latch reset voltage input current VINSENSE transconductance output current PFCCOMP clamp voltage PFCCOMP zero on-time voltage PFCCOMP maximum on-time voltage PFCCOMP VVINSENSE Vstop(VINSENSE) after Vstart(VINSENSE) detected VVOSENSE IO(PFCCOMP) VVOSENSE VVOSENSE power mode, burst mode, lower clamp voltage upper clamp voltage Vton(PFCCOMP)zero Vton(PFCCOMP)max
0.86 1.11
0.89 1.15 -100
0.92 1.19
active after Vstop(VINSENSE) detected
Vflr Vflr(hys) II(VINSENSE)
active after Vth(UVLO) detected
0.75 0.12
Loop compensation PFC(pin PFCCOMP) IO(PFCCOMP) Vclamp(PFCCOMP) 1.20 1.25 1.30 µA/V
SSL1750_1
B.V. 2008. rights reserved.
Product data sheet
Rev. September 2008
Semiconductors
SSL1750
SMPS control drivers
Table Characteristics .continued Measurement data valid Tamb voltages measured with respect ground (pin currents positive when flowing into unless otherwise specified. Symbol ton(PFC) Parameter on-time Conditions VVINSENSE VPFCCOMP Vton(max)(PFC) VVINSENSE VPFCCOMP Vton(max)(PFC) Output voltage sensing (pin VOSENSE) Vth(ol)(VOSENSE) Vstart(fb) Vstop(fb) Vburst(L) Vburst(H) Vreg(VOSENSE) Vovp(VOSENSE) II(VOSENSE) open-loop threshold voltage VOSENSE flyback start voltage flyback stop voltage LOW-level burst mode voltage HIGH-level burst mode voltage regulation voltage VOSENSE overvoltage protection voltage VOSENSE input current VOSENSE maximum sense voltage leading edge blanking time protection current PFCSENSE soft start current soft start voltage soft stop voltage soft start resistance maximum switching frequency minimum off-time valley recognition voltage change with time valley recognition time valley recognition time-out time VPFCAUX peak-peak demagnetization tto(vrec)PFC
Unit
Pulse width modulator
0.35 1.55 1.87 2.19 IO(PFCCOMP) 2.475 2.60 VVOSENSE
0.40 1.72 1.60 1.92 2.24 2.500 2.63
0.45 1.65 1.97 2.29 2.525 2.67
Overcurrent protection (pin PFCSENSE) Vsense(PFC)max tleb(PFC) Iprot(PFCSENSE) mV/µs mV/µs 0.49 0.51 0.52 0.54 0.55 0.57
Soft start, soft stop (pin PFCSENSE) Istart(soft)PFC Vstart(soft)PFC Vstop(soft)PFC Rstart(soft)PFC Oscillator fsw(PFC)max toff(PFC)min (V/t)vrec(PFC) tvrec(PFC) V/µs 0.46 0.42 0.50 0.45 0.54 0.48
Valley switching (pin PFCAUX)
SSL1750_1
B.V. 2008. rights reserved.
Product data sheet
Rev. September 2008
Semiconductors
SSL1750
SMPS control drivers
Table Characteristics .continued Measurement data valid Tamb voltages measured with respect ground (pin currents positive when flowing into unless otherwise specified. Symbol Vth(comp)PFCAUX tto(demag)PFC Iprot(PFCAUX) Parameter comparator threshold voltage PFCAUX demagnetization time-out time protection current PFCAUX source current PFCDRIVER sink current PFCDRIVER maximum output voltage PFCDRIVER overvoltage protection current FBAUX number overvoltage protection cycles comparator threshold voltage FBAUX protection current FBAUX VFBAUX VPFCAUX Conditions -150 -100 Unit Demagnetization management (pin PFCAUX)
Driver (pin PFCDRIVER) Isrc(PFCDRIVER) Isink(PFCDRIVER) VO(PFCDRIVER)max VPFCDRIVER VPFCDRIVER VPFCDRIVER -0.5
Overvoltage protection flyback (pin FBAUX) Iovp(FBAUX) Ncy(ovp)
Demagnetization management flyback (pin FBAUX) Vth(comp)FBAUX Iprot(FBAUX) Vclamp(FBAUX) tsup(xfmr_ring) -1.0 -0.8 -0.6
clamp voltage FBAUX IFBAUX -500 IFBAUX transformer ringing suppression time minimum flyback on-time maximum flyback on-time maximum flyback switching frequency start voltage FBCTRL hysteresis voltage FBCTRL voltage difference FBCTRL
Pulse width modulator flyback ton(fb)min ton(fb)max Oscillator flyback fsw(fb)max Vstart(VCO)FBCTRL Vhys(FBCTRL) VVCO(FBCTRL) -0.1 tleb(fb)
SSL1750_1
B.V. 2008. rights reserved.
Product data sheet
Rev. September 2008
Semiconductors
SSL1750
SMPS control drivers
Table Characteristics .continued Measurement data valid Tamb voltages measured with respect ground (pin currents positive when flowing into unless otherwise specified. Symbol VFBCTRL Vto(FBCTRL) Rint(FBCTRL) IO(FBCTRL) Ito(FBCTRL) Parameter voltage FBCTRL time-out voltage FBCTRL internal resistance FBCTRL output current FBCTRL time-out current FBCTRL VFBCTRL VFBCTRL VFBCTRL VFBCTRL Conditions maximum flyback peak current enable voltage trip voltage 1.85 -1.4 -0.6 -34.5
-1.17 -0.5 -28.5
2.15 -0.93 -0.4 -22.5
Unit V/µs
Peak current control flyback (pin FBCTRL)
Valley switching flyback (pin (V/t)vrec(fb) td(vrec-swon) flyback valley recognition voltage change with time valley recognition switch-on delay time flyback soft start current flyback soft start voltage flyback soft start resistance maximum flyback sense voltage flyback leading edge blanking time source current FBDRIVER sink current FBDRIVER maximum output voltage FBDRIVER protection voltage LATCH output current LATCH Vprot(LATCH) VLATCH Voc(LATCH) enable voltage LATCH hysteresis voltage LATCH open-circuit voltage LATCH start-up Ven(LATCH) Vprot(LATCH) VFBDRIVER VFBDRIVER VFBDRIVER mV/µs mV/µs
Soft start flyback (pin FBSENSE) Istart(soft)fb Vstart(soft)fb Rstart(soft)fb Vsense(fb)max tleb(fb) 0.43 0.49 0.52 0.49 0.52 0.55 0.54 0.55 0.58
Overcurrent protection flyback (pin FBSENSE)
Driver (FBDRIVER-pin) Isrc(FBDRIVER) Isink(FBDRIVER) VO(FBDRIVER)(max) -0.5
Latch input (pin LATCH) Vprot(LATCH) IO(LATCH) Ven(LATCH) Vhys(LATCH) Voc(LATCH) 1.23 1.30 1.25 1.35 1.27 1.40
SSL1750_1
B.V. 2008. rights reserved.
Product data sheet
Rev. September 2008
Semiconductors
SSL1750
SMPS control drivers
Table Characteristics .continued Measurement data valid Tamb voltages measured with respect ground (pin currents positive when flowing into unless otherwise specified. Symbol Tpl(IC) Tpl(IC)hys Parameter protection level temperature hysteresis protection level temperature Conditions Unit Temperature protection
typical application with compensation network PFCCOMP, like example Figure Typically above Vstop(fb). Minimum required voltage change time valley recognition PFCAUX. Minimum required time between demagnetization recognition end. Guaranteed design.
SSL1750_1
B.V. 2008. rights reserved.
Product data sheet
Rev. September 2008
Semiconductors
SSL1750
SMPS control drivers
Package outline
SO16: plastic small outline package; leads; body width SOT109-1
index detail
scale
DIMENSIONS (inch dimensions derived from original dimensions) UNIT inches max. 1.75 0.25 0.10 1.45 1.25 0.25 0.01 0.49 0.36 0.25 0.19 10.0 0.16 0.15 1.27 0.05 1.05 0.039 0.016 0.028 0.020 0.25 0.01 0.25 0.01
0.010 0.057 0.069 0.004 0.049
0.019 0.0100 0.39 0.014 0.0075 0.38
0.244 0.041 0.228
0.028 0.004 0.012
Note Plastic metal protrusions 0.15 (0.006 inch) maximum side included. OUTLINE VERSION SOT109-1 REFERENCES 076E07 JEDEC MS-012 JEITA EUROPEAN PROJECTION
ISSUE DATE 99-12-27 03-02-19
Package outline SOT109-1 (SO16)
SSL1750_1 B.V. 2008. rights reserved.
Product data sheet
Rev. September 2008
Semiconductors
SSL1750
SMPS control drivers
Revision history
Table Revision history Release date 20080915 Data sheet status Product data sheet Change notice Supersedes Document SSL1750_1
SSL1750_1
B.V. 2008. rights reserved.
Product data sheet
Rev. September 2008
Semiconductors
SSL1750
SMPS control drivers
Legal information
13.1 Data sheet status
Document status[1][2] Objective [short] data sheet Preliminary [short] data sheet Product [short] data sheet
Product status[3] Development Qualification Production
Definition This document contains data from objective specification product development. This document contains data from preliminary specification. This document contains product specification.
Please consult most recently issued document before initiating completing design. term `short data sheet' explained section "Definitions". product status device(s) described this document have changed since this document published differ case multiple devices. latest product status information available Internet http://www.nxp.com.
13.2 Definitions
Draft document draft version only. content still under internal review subject formal approval, which result modifications additions. Semiconductors does give representations warranties accuracy completeness information included herein shall have liability consequences such information. Short data sheet short data sheet extract from full data sheet with same product type number(s) title. short data sheet intended quick reference only should relied upon contain detailed full information. detailed full information relevant full data sheet, which available request local Semiconductors sales office. case inconsistency conflict with short data sheet, full data sheet shall prevail.
result personal injury, death severe property environmental damage. Semiconductors accepts liability inclusion and/or Semiconductors products such equipment applications therefore such inclusion and/or customer's risk. Applications Applications that described herein these products illustrative purposes only. Semiconductors makes representation warranty that such applications will suitable specified without further testing modification. Limiting values Stress above more limiting values defined Absolute Maximum Ratings System 60134) cause permanent damage device. Limiting values stress ratings only operation device these other conditions above those given Characteristics sections this document implied. Exposure limiting values extended periods affect device reliability. Terms conditions sale Semiconductors products sold subject general terms conditions commercial sale, published including those pertaining warranty, intellectual property rights infringement limitation liability, unless explicitly otherwise agreed writing Semiconductors. case inconsistency conflict between information this document such terms conditions, latter will prevail. offer sell license Nothing this document interpreted construed offer sell products that open acceptance grant, conveyance implication license under copyrights, patents other industrial intellectual property rights.
13.3 Disclaimers
General Information this document believed accurate reliable. However, Semiconductors does give representations warranties, expressed implied, accuracy completeness such information shall have liability consequences such information. Right make changes Semiconductors reserves right make changes information published this document, including without limitation specifications product descriptions, time without notice. This document supersedes replaces information supplied prior publication hereof. Suitability Semiconductors products designed, authorized warranted suitable medical, military, aircraft, space life support equipment, applications where failure malfunction Semiconductors product reasonably expected
13.4 Trademarks
Notice: referenced brands, product names, service names trademarks property their respective owners. GreenChip trademark B.V.
Contact information
more information, please visit: http://www.nxp.com sales office addresses, please send email salesaddresses@nxp.com
SSL1750_1
B.V. 2008. rights reserved.
Product data sheet
Rev. September 2008
Semiconductors
SSL1750
SMPS control drivers
Contents
General description Features Distinctive features Green features green features Flyback green features Protection features Applications Ordering information Block diagram Pinning information Pinning description Functional description General control Start-up undervoltage lockout Supply management. Latch input Fast latch reset Overtemperature protection (OTP) Power factor correction circuit. control Valley switching demagnetization (pin PFCAUX) 7.2.3 Frequency limitation 7.2.4 Mains voltage compensation (pin VINSENSE) 7.2.5 Soft start-up (pin PFCSENSE) 7.2.6 Burst mode control 7.2.7 Overcurrent protection (pin PFCSENSE) 7.2.8 Mains undervoltage lockout brownout protection (pin VINSENSE). 7.2.9 Overvoltage protection (pin VOSENSE) 7.2.10 open loop protection (pin VOSENSE) 7.2.11 Driver (pin PFCDRIVER) Flyback controller 7.3.1 Multimode operation 7.3.2 Valley switching (pin 7.3.3 Current mode control (pin FBSENSE) 7.3.4 Demagnetization (pin FBAUX) 7.3.5 Flyback control time-out (pin FBCTRL) 7.3.6 Soft start-up (pin FBSENSE) 7.3.7 Maximum on-time 7.3.8 Overvoltage protection (pin FBAUX). 7.3.9 Overcurrent protection (pin FBSENSE) 7.3.10 Driver (pin FBDRIVER). 7.1.1 7.1.2 7.1.3 7.1.4 7.1.5 7.2.1 7.2.2 13.1 13.2 13.3 13.4 Limiting values Thermal characteristics Characteristics Package outline Revision history Legal information Data sheet status Definitions Disclaimers. Trademarks Contact information Contents.
Please aware that important notices concerning this document product(s) described herein, have been included section `Legal information'.
B.V. 2008.
rights reserved.
more information, please visit: http://www.nxp.com sales office addresses, please send email salesaddresses@nxp.com Date release: September 2008 Document identifier: SSL1750_1

SMPS control drivers Rev. September 2008 Product data sheet

Top Searches for this datasheet

Other recent searches