ASSP Power Management Applications (General Purpose DC/DC Converter)
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DS04-27231-5Ea
ASSP Power Management Applications (General Purpose DC/DC Converter)
2-ch DC/DC Converter
with Overcurrent Protection
MB39A104
DESCRIPTION
MB39A104 2-channel DC/DC converter using pulse width modulation (PWM), incorporating overcurrent protection circuit (requiring current sense resistor). This ideal down conversion. Operating high frequency reduces value coil. This ideal built-in power supply such monitors ADSL. This product covered Patent Number 6,147,477.
FEATURES
Built-in timer-latch overcurrent protection circuit (requiring current sense resistor) Power supply voltage range Reference voltage Error amplifier threshold voltage 1.24 High-frequency operation capability (Max) Built-in standby function: (Typ) Built-in soft-start circuit independent loads Built-in totem-pole type output P-ch type package (SSOP-24 type)
APPLICATION
monitor/panel phone Printer Video capture etc.
Copyright©2002-2008 FUJITSU MICROELECTRONICS LIMITED rights reserved 2006.8
MB39A104
ASSIGNMENTS
(TOP VIEW)
VCCO OUT1 ILIM1 DTC1 CSCP -INE1
GNDO OUT2 ILIM2 DTC2 VREF -INE2
(FPT-24P-M03)
MB39A104
DESCRIPTION
Symbol VCCO OUT1 ILIM1 Descriptions Output circuit power supply terminal (Connect same potential pin) Power supply terminal drive circuit External P-ch gate drive terminal Overcurrent protection circuit input terminal Overcurrent protection circuit detection resistor connection terminal. overcurrent detection reference voltage depending external resistor internal current resource (110 comparator block (PWM) input terminal. Compares lowest voltage among DTC1 terminals with triangular wave controls output. Power supply terminal reference power supply control circuit (Connect same potential VCCO terminal) Timer-latch short-circuit protection capacitor connection terminal Error amplifier (Error output terminal Error amplifier (Error inverted input terminal Soft-start capacitor connection terminal Triangular wave oscillation frequency setting resistor connection terminal Triangular wave oscillation frequency setting capacitor connection terminal Soft-start capacitor connection terminal Error amplifier (Error inverted input terminal Error amplifier (Error output terminal Reference voltage output terminal Output circuit ground terminal (Connect same potential GNDO terminal.) comparator block (PWM) input terminal. Compares lowest voltage among DTC2 terminals with triangular wave controls output. Overcurrent protection circuit detection resistor connection terminal. overcurrent detection reference voltage depending external resistor internal current resource (110 Overcurrent protection circuit input terminal External P-ch gate drive terminal Output circuit ground terminal (Connect same potential terminal) Power supply control terminal. Setting terminal level places standby mode.
DTC1 CSCP -INE1 -INE2 VREF DTC2
ILIM2 OUT2 GNDO
MB39A104
BLOCK DIAGRAM
-INE1
VREF
1.24
Error Amp1
priority
Drive1 P-ch
VCCO
Comp.1
OUT1
priority
VCCO Current Protection Logic ILIM1
DTC1 -INE2
priority
VREF
1.24 DTC2
Error Amp2
Drive2 P-ch VCCO
Comp.2
OUT2
priority
priority
Comp.
(3.1
Current Protection Logic
ILIM2
Logic CSCP UVLO
H:UVLO release
Bias Voltage
GNDO
Error Power Supply
Error Referennce
bias
Accuracy
1.24 VREF Power ON/OFF
VREF
MB39A104
ABSOLUTE MAXIMUM RATINGS
Parameter Power supply voltage Output current Output peak current Power dissipation Storage temperature Symbol TSTG Condition VCC, VCCO terminal OUT1, OUT2 terminal Duty Rating 740* +125 Unit
packages mounted epoxy board cm). WARNING: Semiconductor devices permanently damaged application stress (voltage, current, temperature, etc.) excess absolute maximum ratings. exceed these ratings.
RECOMMENDED OPERATING CONDITIONS
Parameter Power supply voltage Reference voltage output current output current Input voltage Control input voltage Output current Output Peak current Oscillation frequency Timing capacitor Timing resistor terminal capacitor Soft-start capacitor Short-circuit detection capacitor Reference voltage output capacitor Operating ambient temperature Symbol IREF VINE VDTC VCTL fOSC CSCP CREF Condition VCC, VCCO terminal VREF terminal terminal -INE1, -INE2 terminal DTC1, DTC2 terminal terminal OUT1, OUT2 terminal
Duty
Value -450 +450 1000 1500
Unit
Overcurrent detection resistance terminal CS1, terminal CSCP terminal VREF terminal
Refer SETTING TRIANGULAR OSCILLATION FREQUENCY". WARNING: recommended operating conditions required order ensure normal operation semiconductor device. device's electrical characteristics warranted when device operated within these ranges. Always semiconductor devices within their recommended operating condition ranges. Operation outside these ranges adversely affect reliability could result device failure. warranty made with respect uses, operating conditions, combinations represented data sheet. Users considering application outside listed conditions advised contact their representatives beforehand.
MB39A104
ELECTRICAL CHARACTERISTICS
(VCC VCCO VREF Parameter Output voltage 1.Reference voltage block [REF] Output voltage temperature variation Input stability Load stability Short-circuit output current 7.Error amplifier 6.Soft2.Under 5.Triangular 4.Short-circuit 3.Short-circuit block start voltage lockout wave oscillator detection block detection block [Error Amp1, block protection circuit block [OSC] [SCP Comp.] [SCP Logic] Error Amp2] [CS1, CS2] block [UVLO] Threshold voltage Hysteresis width Threshold voltage Input source current Reset voltage
Symbol
Conditions VREF VREF VREF VREF VREF
Value 4.95 0.68 -1.4 5.00 0.5* 0.2* 0.73 -1.0 5.05 0.78 -0.6
Unit
VREF VREF/ VREF Line Load VTLH VTHL ICSCP VRST
Threshold voltage
Oscillation frequency Frequency temperature variation
fOSC fOSC/ fOSC
Charge current
Threshold voltage Input bias current Voltage gain
-INE1 -INE2
1.227 1.240 1.253 -120 100*
(Continued)
MB39A104
(Continued) (VCC VCCO VREF Symbol ISOURCE ISINK Threshold voltage VT100 Input current ILIM terminal input current Offset voltage IDTC ILIM Duty cycle DTC1 DTC2 -2.0 -0.6 Conditions Duty cycle Value 1.6* Unit
Parameter 10.Bias 9.Overcurrent 8.PWM comparator 7.Error amplifier block voltage protection circuit block [Error Amp1, block block [PWM Comp.1, Error Amp2] [VH] [OCP1, OCP2] Comp.2] Frequency bandwidth Output voltage Output source current Output sink current
Output voltage
VCCO VCC- VCC- VCC-
11.Output block [Drive1, Drive2]
Output source current
ISOURCE
OUT1 OUT4 Duty OUT1 OUT4 Duty OUT1 OUT2 OUT1 OUT2 Active mode Standby mode
-300
Output sink current Output resistor input voltage
ISINK ICTLH
12.0
12.Control block 13.General [CTL]
Input current Standby current Power supply current
ICTLL ICCS
Standard design value.
MB39A104
TYPICAL CHARACTERISTICS
Power Supply Current Power Supply Voltage
Reference Voltage Power Supply Voltage
Power supply current (mA)
Reference voltage VREF
VREF
Power supply voltage
Power supply voltage
Reference Voltage Load current
Reference Voltage Ambient Temperature
Reference voltage VREF
Reference voltage VREF
-0.5 -1.0 -1.5 -2.0
VREF
+100
Load current IREF (mA)
Ambient temperature (°C)
terminal Current terminal Voltage
terminal current ICTL (µA)
VREF ICTL
terminal voltage VCTL (Continued)
Reference voltage VREF
VREF
MB39A104
Triangular Wave Oscillation Frequency Timing Resistor
Triangular wave oscillation frequency fOSC (kHz)
10000
Triangular Wave Oscillation Frequency Timing Capacitor
10000
Triangular wave oscillation frequency fOSC (kHz)
1000
1000
1000
1000 10000
Timing resistor
Timing capacitor (pF)
Triangular Wave Upper Lower Limit Voltage Triangular Wave Oscillation Frequency
Triangular Wave Upper Lower Limit Voltage Ambient Temperature
Triangular wave upper lower limit voltage
Triangular wave upper lower limit voltage
Upper
Upper
Lower
Lower
+100
1000 1200 1400 1600
Triangular wave oscillation frequency fOSC (kHz)
Ambient temperature
Triangular Wave Oscillation Frequency Ambient Temperature
Triangular wave oscillation frequency fOSC (kHz) Triangular wave oscillation frequency fOSC (kHz)
Triangular Wave Oscillation Frequency Power supply voltage
+100
Ambient temperature
Power supply voltage (Continued)
MB39A104
(Continued)
Error Amplifier, Gain, Phase Frequency
Phase (deg)
Gain (dB)
(15) (14)
1.24 Error Amp1 (Error Amp2) (16)
-180
Frequency (Hz)
Power Dissipation Ambient Temperature
1000
Power dissipation (mW)
Ambient temperature
+100
MB39A104
FUNCTIONS
DC/DC Converter Functions
Reference voltage block (REF) reference voltage circuit generates temperature-compensated reference voltage (5.0 Typ) from voltage supplied from terminal (pin voltage used reference voltage IC's internal circuitry. reference voltage supply load current external device through VREF terminal (pin 17). Triangular-wave oscillator block (OSC) triangular wave oscillator incorporates timing capacitor timing resistor connected respectively terminal (pin terminal (pin generate triangular oscillation waveform amplitude triangular waveforms input comparator Error amplifier block (Error Amp1, Error Amp2) error amplifier detects DC/DC converter output voltage outputs control signals. addition, arbitrary loop gain connecting feedback resistor capacitor from output terminal inverted input terminal error amplifier, enabling stable phase compensation system. Also, possible prevent rush current power supply start-up connecting soft-start capacitor with terminal (pin terminal (pin which non-inverted input terminal Error Amp. Error soft-start detection makes possible system operate fixed soft-start time that independent output load DC/DC converter. comparator block (PWM Comp.1, Comp.2) comparator voltage-to-pulse width modulator that controls output duty depending input/ output voltage. comparator keeps output transistor while error amplifier output voltage remain higher than triangular wave voltage. Output block (Drive1, Drive2) output block totem pole configuration, capable driving external P-channel FET. Bias voltage block (VH) This bias voltage circuit outputs V(Typ) minimum potential output circuit. standby mode, this circuit outputs potential equal VCC.
MB39A104
Control Function
When terminal (pin level, becomes standby mode. power supply current (Max) standby mode. On/Off Setting Conditions Power
(Standby) (Operating)
Protective Functions
Timer-latch overcurrent protection circuit block (OCP) timer-latch overcurrent protection circuit actuated upon completion soft-start period. When overcurrent flows, circuit detects increase voltage between FET's drain source using external resistor, actuates timer circuit, starts charging capacitor CSCP connected CSCP terminal (pin overcurrent remains flowing beyond predetermined period time, latch terminals (pin 3,22) each channel fixed level. circuit sets latch turn external FET. detection current value resistor RLIM1 connected between FET's drain ILIM1 terminal (pin resistor RLIM2 connected between drain ILIM2 terminal (pin 20). Changing connection enables detect overcurrent current sense resistor. reset actuated protection circuit, either power supply turn again terminal (pin level lower VREF terminal (pin voltage (Min) less. (Refer Setting Timer-Latch Overcurrent Protection Detection Current" "ABOUT TIMER-LATCH PROTECTION CIRCUIT".) Timer-latch short-circuit protection circuit (SCP Logic, Comp.) short-circuit detection comparator (SCP Comp.) detects output voltage level Error Amp, error output voltage channel falls below short-circuit detection voltage (3.1 Typ), timer circuits actuated start charging external capacitor CSCP connected CSCP terminal (pin When capacitor voltage reaches about 0.73 circuit turned output transistor sets dead time reset actuated protection circuit, either power supply turn again terminal (pin level lower VREF terminal (pin voltage (Min) less. (Refer Setting Time Constant Timer-Latch Short-Circuit Protection Circuit" "ABOUT TIMER-LATCH PROTECTION CIRCUIT".) Under voltage lockout protection circuit (UVLO) transient state momentary decrease supply voltage, which occurs when power supply turned cause malfunction, resulting breakdown degradation system. prevent such malfunctions, under voltage lockout protection circuit detects decrease internal reference voltage with respect power supply voltage, turns output transistor, sets dead time 100% while holding CSCP terminal (pin level. circuit restores output transistor normal when supply voltage reaches threshold voltage undervoltage lockout protection circuit. Protection circuit operating function table This table refers output condition when protection circuit operating. Operating circuit Overcurrent protection circuit Short-circuit protection circuit Under-voltage lockout OUT1 OUT2
MB39A104
SETTING OUTPUT VOLTAGE
Output Voltage Setting Circuit
(-INE2) -INE1 (CS2) 1.24 Error 1.24
SETTING TRIANGULAR OSCILLATION FREQUENCY
triangular oscillation frequency determined timing capacitor (CT) connected terminal (pin 13), timing resistor (RT) connected terminal (pin 12). Moreover, shifts more greatly than calculated values according constant timing resistor (RT) when triangular wave oscillation frequency exceeds MHz. Therefore, referring "Triangular Wave Oscillation Frequency Timing Resistor" "Triangular Wave Oscillation Frequency Timing Capacitor" TYPICAL CHARACTERISTICS". Triangular oscillation frequency fOSC fOSC (kHz) 1200000 (pF)
MB39A104
SETTING SOFT-START DISCHARGE TIMES
prevent rush currents when turned soft-start connecting soft-start capacitors (CS1 CS2) terminal (pin channel terminal (pin channel respectively. When terminal (pin goes level starts (VCC UVLO threshold voltage), external softstart capacitors (CS1 CS2) connected terminals charged error amplifier output (FB1 (pin (pin determined comparison between lower potentials non-inverted input terminals (1.24 terminal voltages) inverted input terminal voltage (-INE1 (pin voltage, -INE2 (pin voltage). (FB2) terminal voltage decided soft-start period comparison between 1.24 internal reference voltage voltages (CS2) terminal. DC/DC converter output voltage rises proportion (CS2) terminal voltage soft-start capacitor connected (CS2) terminal charged. soft-start time obtained from following formula: Soft-start time: (time output 100%) 0.124 (µF)
(CS2) terminal voltage
Error block -INE1 (-INE2) voltage 1.24
Soft-start time (ts)
MB39A104
Soft-Start Circuit
VREF
-INE1 (-INE2)
priority
Error
ON/OFF signal
(CS2) (CS2)
1.24
UVLO
(FB2)
MB39A104
TREATMENT WITHOUT USING TERMINAL
When using soft-start function, open terminal (pin terminal (pin Without Setting Soft-Start Time
"OPEN"
"OPEN"
MB39A104
ABOUT TIMER-LATCH PROTECTION CIRCUIT
Setting Timer-Latch Overcurrent Protection Detection Current
overcurrent protection circuit actuated upon completion soft-start period. When overcurrent flows, circuit detects increase voltage between FET's drain source using external resistor (RON), actuates timer circuit, starts charging capacitor CSCP connected CSCP terminal (pin overcurrent remains flowing beyond predetermined period time, circuit sets latch terminals (pin level turn external FET. detection current value resistors (RLIM1 RLIM2) connected between FET's drain ILIM1 terminal (pin between drain ILIM2 terminal (pin 20), respectively. internal current (ILIM) timing resistor (RT) connected terminal (pin 12). Time until activating timer circuit setting latch equal short-circuit detection time Setting Time Constant Timer-Latch Short-Circuit Protection Circuit". Internal current value: ILIM ILIM (µA) 2700
Detection current value: IOCP IOCP RLIM fOSC ILIM(A) RLIM() (VIN(V) VO(V)) VO(V) VIN(V) fOSC(Hz) L(H)
Overcurrent detection resistor External resistor Input voltage DC/DC converter output voltage Oscillation frequency Coil inductance
reset actuated protection circuit, either power supply turn again terminal (pin level lower VREF terminal (pin voltage (Min) less. Overcurrent detection circuit
(VS2)
Current Protection Logic
(ILIM2) ILIM1 (RLIM)
CSCP Latch VREF
Each Channel Drive
UVLO
MB39A104
Overcurrent Protection Circuit: Range Operation When overcurrent flow occurs, increased voltage between drain source detected means external (Q1) resistor, operational stability lost when external (Q1) interval determined oscillation frequency, input voltage, output voltage falls below Therefore, circuit should used within range that ensures that interval does fall below 450ns, according following formula. interval (ns) fOSC (Hz)
interval external (Q1) below 450ns, recommend overcurrent detection resistor detect overcurrent, shown below. This example shows range operation overcurrent detection function with setting 3.3V. Method detect current when external FET(Q1) turned
Overcurrent Detection Function Operating Range
(Rs) 1400 Error 1600
fOSC (kHz)
(VS2)
1200 1000
(ILIM2) ILIM1
Operation Range
Connect when using
Method detect mean current (Possible detect more output voltage)
(VS2) Error
Overcurrent Detection Function Operating Range
1600 1400 1200 fOSC (kHz) 1000
Operation Range
(ILIM2) ILIM1
MB39A104
Setting Time Constant Timer-Latch Short-Circuit Protection Circuit
Each channel uses short-circuit detection comparator (SCP Comp.) always compare error amplifiers output level reference voltage (3.1 Typ). While DC/DC converter load conditions stable channels, short-circuit detection comparator output remains level, CSCP terminal (pin held level. load condition channel changes rapidly short-circuit load, causing output voltage drop, output short-circuit detection comparator goes level. This causes external shortcircuit protection capacitor CSCP connected CSCP terminal charged Short-circuit detection time (tSCP) tSCP 0.73 CSCP (µF) When capacitor CSCP charged threshold voltage (VTH 0.73 latch external turned (dead time 100%). this time, latch input closed CSCP terminal (pin held level. short-circuit detected either channels, both channels shut off. When power supply turned back VREF terminal (pin voltage less than (Min) setting terminal (pin level, latch released.
Timer-latch short-circuit protection circuit
(FB2)
(-INE2) -INE1
Error
(1.24
Comp.
(3.1
each channel Drive
CSCP VREF UVLO
Latch
MB39A104
TREATMENT WITHOUT USING CSCP TERMINAL
When using timer-latch short-circuit protection circuit, connect CSCP terminal (pin with shortest distance.
Treatment
without using CSCP
CSCP
RESETTING LATCH EACH PROTECTION CIRCUIT
When overcurrent, short-circuit protection circuit detects each abnormality, sets latch output level. reset actuated protection circuit, either power supply turn again terminal (pin level lower VREF terminal (pin voltage (Min) less.
MB39A104
EQUIVALENT CIRCUIT
Reference voltage block
1.24 protection element 77.8 24.8 protection element VREF protection element
Control block
Soft-start block
VREF (5.0
Short-circuit detection block
VREF (5.0 CSCP
Triangular wave oscillator block (RT)
(3.1 1.35
Triangular wave oscillator (CT) block
(3.1
Error amplifier block (CH1, CH2)
VREF (5.0 -INEX
Overcurrent protection circuit block
ILIMX VCCO
1.24
GNDO
comparator block (CH1, CH2)
Bias voltage block
VCCO
Output block (CH1, CH2)
VCCO
DTCX
GNDO
GNDO
Each channel
Stepdown
R10R11 VREF Error Amp1
priority
OUT1
VCCO (5.0
MB39A104
ON/OFF signal (Hiz OFF) 1.24
priority
VCCO ILIM1 Drive2 P-ch VCCO
priority
Comp.1 Drive1 P-ch
1000 Current Protection Logic R15R16 VREF Error Amp2 1.24
priority priority
APPLICATION EXAMPLE
DTC1 Comp.2 OUT2
Stepdown
(3.3
ON/OFF signal (Hiz OFF) 1000 DTC2 Comp. Logic 1000 UVLO
UVLO release
ILIM2
Current Protection Logic
CSCP
Bias Voltage
Error Power Supply
GNDO
Error Reference
bias
accuracy
1.24 VREF ON/OFF
Power
VREF
(Power (Standby mode)
MB39A104
PARTS LIST
COMPONENT
C10, C11, C12, C14, C16,
ITEM
P-ch Diode Inductor Ceramics Condenser OS-CONCeramics Condenser OS-CONCeramics Condenser Ceramics Condenser Ceramics Condenser Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor
SPECIFICATION
0.42 (Max) 1000
VENDOR
TOSHIBA ROHM SUMIDA SANYO SANYO
PARTS
TPC8102 RB0530L-30 CDRH104R-150 C1608CH1H101J 20SVP10M C3225JF1E106Z 6SVP82M C1608JB1H104K C1608JB1H102K C1608JB1H104K RR0816P-243-D RR0816P-272-D RR0816P-224-D RR0816P-683-D RR0816P-154-D RR0816P-563-D RR0816P-104-D RR0816P-133-D
Note TOSHIBA ROHM SANYO SUMIDA
TOSHIBA Corporation ROHM Co., SANYO Electric Co., Ltd. Corporation SUMIDA Electric Co., Ltd. SUSUMU Co., Ltd.
MB39A104
SELECTION COMPONENTS
P-ch
P-ch MOSFET switching should rated least more than maximum input voltage. minimize continuity loss, with RDS(ON) between drain source. high input voltage high frequency operation, on/off-cycle switching loss will higher that power dissipation must considered. this application, Toshiba TPC8102 used. Continuity loss, on/off switching loss, total loss determined following formulas. selection must ensure that peak drain current does exceed rated values, also must accordance with overcurrent detection levels. Continuity loss (ON) Duty On-cycle switching loss (ON) (Max) fOSC (ON) Off-cycle switching loss (OFF) (Max) (Max) fOSC (OFF) Total loss (ON) (OFF) Example: Using Toshiba TPC8102 Input voltage (Max) output voltage drain current Oscillation frequency fOSC kHz, drain-source resistance (ON) Drain current (Max) (Max) (Max) 10-6 0.263
3.25
Drain current (Min) (Min) (Min) 10-6 0.263
2.75
MB39A104
(ON) Duty 0.05 0.263 0.118 (ON) (Max) fOSC 10-9
0.475
(OFF)
(Max) (Max) fOSC 3.25 10-9
0.515 (ON) (OFF) 0.118 0.475 0.515 1.108
above power dissipation figures TPC8102 satisfied with ample margin Input voltage (Max) output voltage drain current Oscillation frequency fOSC kHz, drain-source resistance (ON) Drain current (Max) (Max) (Max) 10-6 0.174
3.18 Drain current (Min) (Min) (Min) 10-6 0.174
2.82
MB39A104
(ON) Duty 0.05 0.174 (Max) fOSC 10-9 0.078 (ON)
0.475 (OFF) (Max) (Max) fOSC
3.18 10-9
0.504 (ON) (OFF) 0.078 0.475 0.504 1.057 above power dissipation figures TPC8102 satisfied with ample margin
Inductors
selecting inductors, course essential apply more current than rated capacity inductor, also note that lower limit ripple current critical point that reached will cause discontinuous operation considerable drop efficiency. This prevented choosing higher inductance value, which will enable continuous operation under light loads. Note that inductance value high, however, direct current resistance (DCR) increased this will also reduce efficiency. inductance must point where efficiency greatest. Note also that superimposition characteristics become worse load current value approaches rated current value inductor, that inductance value reduced ripple current increases, causing loss efficiency. selection rated current value inductance value will vary depending where point peak efficiency lies with respect load current. Inductance values determined following formulas. value load current conditions that peak peak value ripple current load current less. Inductance value (VIN
MB39A104
Example: (VIN 0.263
4.91 (VIN 3.3) 0.174
3.64
Inductance values derived from above formulas values that provide sufficient margin continuous operation maximum load current, which continuous operation possible light loads. therefore necessary determine load level which continuous operation becomes possible. this application, Sumida CDRH104R-150 used. load current value under continuous operating conditions determined following formula. Load current value under continuous operating conditions toff Example: Using CDRH104R-150 (allowable tolerance ±30%) rated current toff 0.263)
10-6
245.7 toff 0.174)
10-6
181.7
MB39A104
determine whether current through inductor within rated values, necessary determine peak value ripple current well peak-to-peak values ripple current that affect output ripple voltage. peak value peak-to-peak value ripple current determined following formulas. Peak value
Peak-to-peak value Example: Using CDRH104R-150 (allowable tolerance ±30%) rated current Peak value:
0.263 10-6
3.25 0.174
10-6
3.18 Peak-to-peak value:
0.263 10-6
0.491
0.174 10-6
0.364
MB39A104
Flyback diode
flyback diode generally used Shottky barrier diode (SBD) when reverse voltage diode less than 40V. characteristics higher speed terms faster reverse recovery time, lower forward voltage, ideal achieving high efficiency. long reverse voltage sufficiently higher than input voltage, average current flowing through diode within average output current level, peak current within peak surge current limits, there problem. this application Rohm RB053L-30 used. diode average current diode peak current calculated following formulas. Diode mean current Diode peak current IDip IDip toff) Example: Using Rohm RB053L-30 reverse voltage) average output voltage peak surge current (forward voltage) 0.42
0.263) 2.21
0.174) 2.48 IDip 3.24 IDip 3.18 toff) toff)
MB39A104
Smoothing Capacitor
smoothing capacitor indispensable element reducing ripple voltage output. selecting smoothing capacitor essential consider equivalent series resistance (ESR) allowable ripple current. Higher means higher ripple voltage, that reduce ripple voltage necessary select capacitor with ESR. However, capacitor with have substantial effects loop phase characteristics, therefore requires attention system stability. Care should also taken capacity with sufficient margin allowable ripple current. This application uses (OS-CON 6SVP82M made SANYO. ESR, capacitance value, ripple current calculated from following formulas. Equivalent Series Resistance 2fCL Capacitance value ESR) Ripple current ICLrms (VIN ICLrms Example: Using 6SVP82M Rated voltage maximum allowable ripple current 1570 mArms Equivalent series resistance 0.050 0.491 2fCL 10-6
98.0
MB39A104
0.033 0.364 2fCL 10-6
86.8 Capacitance value ESR) 0.491 (0.050 0.491 0.05)
6.14 ESR) 0.364 (0.033 0.364 0.05)
7.83 Ripple current ICLrms (VIN 0.263 10-6
141.7 mArms ICLrms (VIN 3.3) 0.174 10-6
105.1 mArms
MB39A104
REFERENCE DATA
Conversion Efficiency Load Current (CH1)
Conversion efficiency
Output
Load current
Conversion Efficiency Load Current (CH2)
Conversion efficiency
Output
Load current
(Continued)
MB39A104
(Continued)
Switching Wave Form (CH1)
1.67
(µs)
Switching Wave Form (CH2)
(µs)
MB39A104
USAGE PRECAUTIONS
Printed circuit board ground lines should with consideration common impedance. Take appropriate static electricity measures. Containers semiconductor materials should have anti-static protection made conductive material. After mounting, printed circuit boards should stored shipped conductive bags containers. Work platforms, tools, instruments should properly grounded. Working personnel should grounded with resistance between body ground. apply negative voltages. negative voltages below -0.3 create parasitic transistors lines, which cause malfunction.
ORDERING INFORMATION
Part number MB39A104PFV-E1 Package 24-pin plastic SSOP (FPT-24P-M03) Remarks Lead Free version
BOARD ORDERING INFORMATION
board part MB39A104EVB board version Board Rev. Remarks SSOP-24P
RoHS COMPLIANCE INFORMATION LEAD (Pb) FREE VERSION
products Fujitsu Microelectronics with "E1" compliant with RoHS Directive observed standard lead, cadmium, mercury, Hexavalent chromium, polybrominated biphenyls (PBB) polybrominated diphenyl ethers (PBDE) product that conforms this standard added "E1" part number.
MARKING FORMAT (Lead Free version)
XXXX
INDEX
Lead Free version
MB39A104
LABELING SAMPLE (LEAD FREE VERSION)
lead-free mark JEITA logo JEDEC logo
MB123456P
(3N) 1MB123456P-789-GE1 1000
(3N)2 1561190005 107210
PASS
1,000 MB123456P
2006/03/01
ASSEMBLED JAPAN
MB123456P
0605 Z01A 1000
1561190005
Lead Free version
MB39A104
MB39A104PFV-E1 RECOMMENDED CONDITIONS MOISTURE SENSITIVITY LEVEL
Item Mounting Method Mounting times Before opening Storage period From opening reflow When storage period after opening exceeded Storage conditions Condition (infrared reflow) Manual soldering (partial heating method) times Please within years after Manufacture. Less than days Please processes within days after baking (125 24H)
70%RH less (the lowest possible humidity)
[Temperature Profile Standard Reflow] (infrared reflow) rank
(d')
Temperature Increase gradient Preliminary heating Temperature Increase gradient Actual heating (d')
Cooling
Average °C/s °C/s Temperature Average °C/s °C/s Temperature Max; more, less Temperature more, less Temperature more, less Temperature more, less Natural cooling forced cooling
Note Temperature package body Manual soldering (partial heating method) Conditions Temperature Times max/pin
MB39A104
PACKAGE DIMENSION
24-pin plastic SSOP Lead pitch Package width package length Lead shape Sealing method Mounting height Weight 0.65 7.75 Gullwing Plastic mold 1.45 0.12
(FPT-24P-M03)
Code (Reference)
24-pin plastic SSOP (FPT-24P-M03)
*17.75±0.10(.305±.004)
Note Resin protrusion. (Each side +0.15 (.006) Max). Note These dimensions include resin protrusion. Note Pins width pins thickness include plating thickness. Note Pins width include cutting remainder.
0.17±0.03 (.007±.001)
5.60±0.10
INDEX
7.60±0.20 (.220±.004) (.299±.008) Details part 1.25 -0.10 .049 -.004
+0.20 +.008
(Mounting height)
0.25(.010) 0~8°
0.65(.026)
0.24 .009
+0.08 -0.07 +.003 -.003
0.13(.005)
0.50±0.20 (.020±.008) 0.60±0.15 (.024±.006)
0.10±0.10 (.004±.004) (Stand off)
0.10(.004)
2003 FUJITSU LIMITED F24018S-c-4-5
Dimensions (inches). Note: values parentheses reference values.
MB39A104
MEMO
MB39A104
MEMO
FUJITSU MICROELECTRONICS LIMITED
Shinjuku Dai-Ichi Seimei Bldg. 7-1, Nishishinjuku 2-chome, Shinjuku-ku, Tokyo 163-0722, Japan Tel: +81-3-5322-3347 Fax: +81-3-5322-3387 http://jp.fujitsu.com/fml/en/ further information please contact: North South America FUJITSU MICROELECTRONICS AMERICA, INC. 1250 Arques Avenue, Sunnyvale, 94085-5401, U.S.A. Tel: +1-408-737-5600 Fax: +1-408-737-5999 http://www.fma.fujitsu.com/ Europe FUJITSU MICROELECTRONICS EUROPE GmbH Pittlerstrasse 63225 Langen, Germany Tel: +49-6103-690-0 Fax: +49-6103-690-122 Korea FUJITSU MICROELECTRONICS KOREA LTD. KOSMO TOWER, 1002 Daechi-Dong, Kangnam-Gu,Seoul 135-280 Korea Tel: +82-2-3484-7100 Fax: +82-2-3484-7111 http://www.fmk.fujitsu.com/ Asia Pacific FUJITSU MICROELECTRONICS ASIA LTD. Lorong Chuan, #05-08 Tech Park, Singapore 556741 Tel: +65-6281-0770 Fax: +65-6281-0220 FUJITSU MICROELECTRONICS SHANGHAI CO., LTD. Rm.3102, Bund Center, No.222 Road(E), Shanghai 200002, China Tel: +86-21-6335-1560 Fax: +86-21-6335-1605 http://cn.fujitsu.com/fmc/ FUJITSU MICROELECTRONICS PACIFIC ASIA LTD. 10/F., World Commerce Centre, Canton Road Tsimshatsui, Kowloon Hong Kong Tel: +852-2377-0226 Fax: +852-2376-3269 http://cn.fujitsu.com/fmc/tw
Rights Reserved. contents this document subject change without notice. Customers advised consult with sales representatives before ordering. information, such descriptions function application circuit examples, this document presented solely purpose reference show examples operations uses FUJITSU MICROELECTRONICS device; FUJITSU MICROELECTRONICS does warrant proper operation device with respect based such information. When develop equipment incorporating device based such information, must assume responsibility arising such information. FUJITSU MICROELECTRONICS assumes liability damages whatsoever arising information. information this document, including descriptions function schematic diagrams, shall construed license exercise intellectual property right, such patent right copyright, other right FUJITSU MICROELECTRONICS third party does FUJITSU MICROELECTRONICS warrant non-infringement third-party's intellectual property right other right using such information. FUJITSU MICROELECTRONICS assumes liability infringement intellectual property rights other rights third parties which would result from information contained herein. products described this document designed, developed manufactured contemplated general use, including without limitation, ordinary industrial use, general office use, personal use, household use, designed, developed manufactured contemplated accompanying fatal risks dangers that, unless extremely high safety secured, could have serious effect public, could lead directly death, personal injury, severe physical damage other loss (i.e., nuclear reaction control nuclear facility, aircraft flight control, traffic control, mass transport control, medical life support system, missile launch control weapon system), requiring extremely high reliability (i.e., submersible repeater artificial satellite). Please note that FUJITSU MICROELECTRONICS will liable against and/or third party claims damages arising connection with above-mentioned uses products. semiconductor devices have inherent chance failure. must protect against injury, damage loss from such failures incorporating safety design measures into your facility equipment such redundancy, fire protection, prevention over-current levels other abnormal operating conditions. Exportation/release products described this document require necessary procedures accordance with regulations Foreign Exchange Foreign Trade Control Japan and/or export control laws. company names brand names herein trademarks registered trademarks their respective owners.
Edited Strategic Business Development Dept.
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