Quasi-resonant topology noise soft switching Bottom-skip operation Imp
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STR-W6765 Quasi-Resonant Topology Primary Switching Regulators
Quasi-resonant topology noise soft switching Bottom-skip operation Improved system efficiency over entire output load avoiding increase switching frequency Standby burst mode operation Lowers input power very light output load condition Avalanche-guaranteed MOSFET Improves systemlevel reliability does require VDSS derating (Universal/230 input)
STR-W6765 quasi-resonant topology designed SMPS applications. shows lower noise characteristics than conventional solutions, especially greater than MHz. also provides soft-switching operation turn internal MOSFET close zero voltage (VDS bottom point) resonant characteristic primary inductance resonant capacitor. package fully molded TO-220, which contains controller chip (MIC) MOSFET, enabling output power with universal input with input. bottom-skip function skips first bottom turns MOSFET second bottom point, minimize increase operational frequency light output load, improving system-level efficiency over entire load range. There standby functions available reduce input power under very light load conditions. first auto-burst mode operation that internally triggered periodic sensing, other manual standby mode, which executed clamping secondary output. general applications, manual standby mode reduces input power further compared auto-burst mode. soft-start function minimizes surge voltage reduces power stress MOSFET secondary rectifying
Continued next page.
Continued next page.
Package: 6-pin TO-220
Typical Application
ErrAmp
Standby ON/OFF LowB
STR-W6735
Standby
Cont
S/GND
/OLP
ErrAmp, Sanken series device recommended Sanken linear regulator recommended
ROCP
28103.30-6
STR-W6765
Features Benefits (continued) Various protections Improved system-level reliability Pulse-by-pulse drain overcurrent limiting Overvoltage protection (bias winding voltage sensing), with latch Overload protection with latch Maximum on-time limit
Quasi-Resonant Topology Primary Switching Regulators
Description (continued) diodes during start-up sequence. Various protections such overvoltage, overload, overcurrent, maximum on-time protections avalanche-energy-guaranteed MOSFET secure good systemlevel reliability. Applications include following: monitor, Printer, Scanner SMPS power supplies
Selection Guide
Part Number
STR-W6765
Package
TO-220
Packing
Bulk, pieces
Absolute Maximum Ratings 25°C
Parameter Drain Current1 Maximum Switching Current2 Single Pulse Avalanche Energy3 Input Voltage Controller (MIC) SS/OLP Terminal Voltage Terminal Inflow Current Terminal Voltage OCP/BD Terminal Voltage MOSFET Power Dissipation4 Symbol IDpeak IDmax VSSOLP VOCPBD Terminal Conditions Single pulse -20°C 125°C Single pulse, ILpeak within limits With infinite heatsink Without heatsink Refer Rating 11.2 11.2 -0.5 -0.5 -1.5 28.7 Unit
Controller (MIC) Power Dissipation Operating Internal Leadframe Temperature Operating Ambient Temperature Storage Temperature Tstg Junction Temperature 1Refer figure DMAX drain current determined drive voltage threshold voltage, Vth, MOSFET 3Refer figure 4Refer figure
performance characteristics given typical values circuit system baseline design only nominal operating voltage ambient temperature +25°C, unless otherwise stated.
Allegro MicroSystems, Inc. Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com
STR-W6765
Quasi-Resonant Topology Primary Switching Regulators
Protection latch
DRIVE
Start Stop Burst
Burst Control
Reg& Iconst
Delay
S/GND
MaxON
Soft Start
Bottom Selector Counter
Number
Name S/GND SS/OLP OCP/BD Drain Clipped
Description MOSFET drain connection MOSFET source ground
Source/ground terminal Power supply terminal Soft Start/Overload Protection terminal Feedback terminal Overcurrent Protection/Bottom Detection
Input power supply control circuit Input delay Overload Protection Soft Start operation Input Constant Voltage Control Burst (intermittant)Mode oscillation cotnrol signals Input overcurrent detection bottom detection signals
Figure MOSFET Safe Operating Area Derating Curve
Safe Operating Area Temperature Derating Coefficient
Drain Current, 11.2 10.0
Refer figure MOSFET temperature derating coefficient 1000
Temperature, (°C)
Allegro MicroSystems, Inc. Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com
Figure MOSFET Safe Operating Area
Drain Current versus Voltage 25°C, Single Pulse
100.0
OCP/BD SS/OLP
Functions
(on)
Drain-to-Source Voltage,
STR-W6765
Quasi-Resonant Topology Primary Switching Regulators
Figure MOSFET Avalanche Energy Derating Curve
Temperature Derating Coefficient (°C/W) Transient Thermal Resistance,
Figure Transient Thermal Resistance
10.000
1.000
0.100
0.010
0.001 Channel Junction Temperature, (°C)
Time,
100m
Figure MOSFET Power Dissipation versus Temperature
Power Dissipation, With infinite heatsink 28.7
Without heatsink
Ambient Temperature, (°C)
Allegro MicroSystems, Inc. Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com
STR-W6765
ELECTRICAL CHARACTERISTICS Characteristic Symbol
Quasi-Resonant Topology Primary Switching Regulators
Terminals Min. Typ. Max. Units
ELECTRICAL CHARACTERISTICS Controller (MIC)1, valid 25°C, unless otherwise specified Power Supply Start-up Operation Operation Start Voltage Operation Stop Voltage Circuit Current Operation Circuit Current Non-Operation Oscillation Frequency Soft Start Operation Stop Voltage Soft Start Operation Charging Current Normal Operation Bottom-Skip Operation Threshold Voltage Bottom-Skip Operation Threshold Voltage Overcurrent Detection Threshold Voltage OCP/BDOCP/BD Terminal Outflow Current Quasi-Resonant Operation Threshold Voltage Quasi-Resonant Operation Threshold Voltage Terminal Threshold Voltage Terminal Inflow Current (Normal Operation) Standby Operation Standby Operation Start Voltage Standby Operation Start Voltage Interval Standby Non-Operation Circuit Current Terminal Inflow Current, Standby Operation Terminal Threshold Voltage, Standby Operation Minimum Time Maximum Time Protection Operation Overload Protection Operation Threshold Voltage Overload Protection Operation Charging Current Overvoltage Protection Operation Voltage Latch Circuit Holding Current2 Latch Circuit Release Voltage2 Drain-to-Source Breakdown Voltage Drain Leakage Current Resistance Switching Time Thermal Resistance
1Current
VCC(ON) VCC(OFF) ICC(ON) ICC(OFF) fosc VSSOLP(SS) ISSOLP(SS) VOCPBD(BS1) VOCPBD(BS2) VOCPBD(LIM) IOCPBD VOCPBD(TH1) VOCPBD(TH2) VFB(OFF) IFB(ON) VCC(S) VCC(SK) ICC(S) IFB(S) VFB(S) tON(MIN) tON(MAX) VSSOLP(OLP) ISSOLP(OLP) VCC(OVP) ICC(H) VCC(La.OFF) VDSS IDSS RDS(on)
Junction Internal Frame
16.3 -710 -0.720 -0.485 -0.995 -250 0.28 0.67 1.32 10.3 1.10 0.55 0.40 27.5 25.5
18.2 -550 -0.665 -0.435 -0.940 -100 0.40 0.80 1.45 1000 11.1 1.35 1.10 0.82 32.5 27.7
19.9 10.6 -390 -0.605 -0.385 -0.895 0.52 0.93 1.58 1400 12.1 1.65 1.50 1.25 39.0 29.9 1.55
°C/W
ELECTRICAL CHARACTERISTICS MOSFET, valid 25°C, unless otherwise specified
polarity with respect positive current indicates current sink terminal named, negative current indicates source terminal named. 2Latch circuit refers operation during Overload Protection Overvoltage Protection.
Allegro MicroSystems, Inc. Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com
STR-W6765
Quasi-Resonant Topology Primary Switching Regulators
ELECTRICAL CHARACTERISTICS Test Conditions* Parameter Operation Start Voltage Operation Stop Voltage Circuit Current Operation Circuit Current Non-operation Oscillation Frequency Soft Start Operation Stop Voltage Soft Start Operation Charging Current Bottom-Skip Operation Threshold Voltage Bottom-Skip Operation Threshold Voltage Overcurrent Detection Threshold Voltage OCP/BDOCP/BD Terminal Outflow Current Quasi-Resonant Operation Threshold Voltage Quasi-Resonant Operation Threshold Voltage Terminal Threshold Voltage Terminal Inflow Current (Normal Operation) Standby Operation Start Voltage Standby Operation Start Voltage Interval Standby Non-Operation Circuit Current Terminal Inflow Current, Standby Operation Terminal Threshold Voltage Standby Operation Minimum Time Maximum Time Test Conditions voltage which oscillation starts. voltage which oscillation stops. Inflow current flowing into power supply terminal oscillation. Inflow current flowing into power supply terminal prior oscillation. Oscillating frequency fosc= SS/OLP terminal voltage which ISS/OLP reach -100 raising SS/OLP terminal voltage from gradually. SS/OLP terminal charging current (SS/OLP terminal voltage Input pulse width, shown waveform OCP/BD terminal twice after V1-3 rises. After that, offset input waveform gradually from minus direction. Measurment offset voltage VOCPBD(BS1) taken when V1-3 start-to-fall point switches from twopulses-after one-pulse-after. After measuring VOCPBD(BS1), shown waveform offset input waveform gradually. Measurment offset voltage VOCPBD(BS2) taken when V1-3 start-to-fall point switches from two-pulses-after one-pulse-after. OCP/BD terminal voltage which oscillation stops lowering OCP/BD terminal voltage from gradually. OCP/BD terminal outflow current (OCP/BD terminal voltage -0.95 OCP/BD terminal voltage which oscillation starts with setting OCP/BD terminal voltage then lowering voltage gradually. OCP/BD terminal voltage which oscillation stops raising OCP/BD terminal voltage from gradually. terminal voltage which oscillation stops raising terminal voltage from gradually. terminal inflow current terminal voltage voltage which reaches terminal voltage Specified VCC(SK) VCC(S) VCC(OFF). Inflow current flowing into power supply terminals prior oscillation terminal voltage terminal inflow current terminal voltage terminal voltage which oscillation starts raising terminal voltage from gradually. Waveform between terminals low. Waveform between terminals low. 208.8 Measurement Circuit
10.2 10.2
Continued next page.
Allegro MicroSystems, Inc. Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com
STR-W6765
Quasi-Resonant Topology Primary Switching Regulators
ELECTRICAL CHARACTERISTICS Test Conditions*, continued Parameter Overload Protection Operation Threshold Voltage Overload Protection Operation Charging Current Overvoltage Protection Operation Voltage Latch Circuit Holding Current Test Conditions SS/OLP terminal voltage which oscillation stops. SS/OLP terminal charging current (SS/OLP terminal voltage voltage which oscillation stops. Inflow current VCC(OFF) 0.3; after operation. VCC(OFF) Measurement Circuit
Latch Circuit Release Voltage voltage which reaches lower decreasing after operation. Drain-to-Source Breakdown Voltage IDSS Drain Leakage Current VDSS Single Pulse Avalanche Energy On-Resistance Switching Time *Oscillating operation specified with rectangular waveform between terminals
Allegro MicroSystems, Inc. Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com
STR-W6765
Quasi-Resonant Topology Primary Switching Regulators
Measurement Circuit
S/GND
SS/OLP
OCP/BD
4.7k
Measurement Circuit
S/GND
SS/OLP
OCP/BD
4.7k
Measurement Circuit
S/GND
SS/OLP
OCP/BD
4.7k
Allegro MicroSystems, Inc. Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com
STR-W6765
Quasi-Resonant Topology Primary Switching Regulators
Measurement Circuit
S/GND SS/OLP OCP/BD
4.7k
Measurement Circuit
S/GND SS/OLP OCP/BD
Measurement Circuit
S/GND
SS/OLP
OCP/BD
OSC1
500nS
4.7k
V1-3
OSC1
Allegro MicroSystems, Inc. Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com
STR-W6765
Quasi-Resonant Topology Primary Switching Regulators
Measurement Circuit
S/GND SS/OLP OCP/BD
IDSS VDSS
MOSFET MOSFET measuring equipment
Measurement Circuit
SS/OLP
OCP/BD
Avalanche energy tester SPeak
Equation calculation avalanche engery, EAS; adjusted ILPeak
ILPeak
Peak Peak
Measurement Circuit
SS/OLP OCP/BD
4.7k VDS(ON) RDS(ON)=VDS(ON)/IDS
Allegro MicroSystems, Inc. Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com
STR-W6765
Quasi-Resonant Topology Primary Switching Regulators
Waveform
VOCP/BD
VOCPBD(BS1)
Waveform
VOCP/BD
VOCPBD(BS2)
Allegro MicroSystems, Inc. Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com
STR-W6765
Quasi-Resonant Topology Primary Switching Regulators
PACKAGE DIMENSIONS, TO-220
±0.2
Branding
XXXXXXXX XXXXXXXX
16.9 ±0.3
±0.1 Terminal dimension case surface ±0.5
1.34 -0.1
+0.2
(5.4)
1.74 -0.1
+0.2
±0.15 7.62 ±0.15 Terminal dimensions case surface
0.45 -0.1
+0.2
5.08 ±0.6 Terminal dimension lead tips
Gate burr: (max.) Terminal core material: Terminal treatment: plating solder Heat sink material: Heat sink treatment: plating Leadform: 2003 Weight (approximate): Dimensions millimeters
Drawing reference only Branding codes (exact appearance manufacturer discretion): line, type: W6765 line, lot: YMDD Where: last digit year manufacture month 2-digit date manufacturer registration symbol
10.4 ±0.5
±0.2
Gate Burr
±0.2
10.0 ±0.2
±0.2 ±0.2
Allegro MicroSystems, Inc. Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com
STR-W6765
Quasi-Resonant Topology Primary Switching Regulators
PACKING SPECIFICATIONS Minimum packing option: Tube FM-205
+0.4
R0.6 9.5-0.1 (15.4)
+0.3
Shipping Tube Dimensions: Wall thickness: 0.6±0.3 Wall warp: Material: Hardened polyvinyl Coating: antistatic Tolerance ±0.4 unless otherwise specified
2.85 (3.6) 14.3
35.0
Side marked "ANTISTATIC"
-0.2
+0.3
Spacer
Carton (side view)
Shipping Carton Dimensions: Capacity: 1800 pieces maximum carton tubes carton rows, tubes
Tube
Spacer
Tube
dimensions:
Allegro MicroSystems, Inc. Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com
STR-W6765
Quasi-Resonant Topology Primary Switching Regulators
WARNING These devices designed operated lethal voltages energy levels. Circuit designs that embody these components must conform with applicable safety requirements. Precautions must taken prevent accidental contact with power-line potentials. connect grounded test equipment. isolation transformer recommended during circuit development breadboarding.
Because reliability affected adversely improper storage environments handling methods, please observe following cautions. Cautions Storage Ensure that storage conditions comply with standard temperature (5°C 35°C) standard relative humidity (around 75%); avoid storage locations that experience extreme changes temperature humidity. Avoid locations where dust harmful gases present avoid direct sunlight. Reinspect rust leads solderability products that have been stored long time. Cautions Testing Handling When tests carried during inspection testing other standard test periods, protect products from power surges from testing device, shorts between adjacent products, shorts heatsink. Remarks About Using Silicone Grease with Heatsink When silicone grease used mounting this product heatsink, shall applied evenly thinly. more silicone grease than required applied, produce stress. Volatile-type silicone greases produce cracks after long periods time, resulting reduced heat radiation effect. Silicone grease with consistency (hard grease) cause cracks mold resin when screwing product heatsink. recommended silicone greases heat radiation purposes, which will cause adverse effect product life, indicated below: Type G746 YG6260 Suppliers Shin-Etsu Chemical Co., Ltd. Toshiba Silicone Co., Ltd.
SC102 Corning Toray Silicone Co., Ltd. Soldering When soldering products, please sure minimize working time, within following limits: 260±5°C 350±5°C Soldering iron should distance least from body products Electrostatic Discharge When handling products, operator must grounded. Grounded wrist straps worn should have least resistance ground prevent shock hazard. Workbenches where products handled should grounded provided with conductive table floor mats. When using measuring equipment such curve tracer, equipment should grounded. When soldering products, head soldering irons solder bath must grounded other prevent leak voltages generated them from being applied products. products should always stored transported shipping containers conductive containers, wrapped aluminum foil. Assembly During soldering other operations, interior frame temperature device should never exceed 105°C. Recommended screw torque through mounting 0,588 0.785
Allegro MicroSystems, Inc. Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com
STR-W6765
Quasi-Resonant Topology Primary Switching Regulators
products described herein manufactured Japan Sanken Electric Co., Ltd. sale Allegro MicroSystems, Inc. Sanken Allegro reserve right make, from time time, such departures from detail specifications required permit improvements performance, reliability, manufacturability products. Therefore, user cautioned verify that information this publication current before placing order. When using products described herein, applicability suitability such products intended purpose shall reviewed users responsibility. Although Sanken undertakes enhance quality reliability products, occurrence failure defect semiconductor products certain rate inevitable. Users Sanken products requested take, their risk, preventative measures including safety design equipment systems against possible injury, death, fires damages society device failure malfunction. Sanken products listed this publication designed intended components general-purpose electronic equipment apparatus (home appliances, office equipment, telecommunication equipment, measuring equipment, etc.). Their application requiring radiation hardness assurance (e.g., aerospace equipment) supported. When considering Sanken products applications where higher reliability required (transportation equipment control systems equipment, fire- burglar-alarm systems, various safety devices, etc.), contact company sales representative discuss obtain written confirmation your specifications. Sanken products without written consent Sanken applications where extremely high reliability required (aerospace equipment, nuclear power-control stations, life-support systems, etc.) strictly prohibited. information included herein believed accurate reliable. Application operation examples described this publication given reference only Sanken Allegro assume responsibility infringement industrial property rights, intellectual property rights, other rights Sanken Allegro third party that result from use. Copyright 2006 Allegro MicroSystems, Inc. This datasheet based Sanken datasheet SSE-22774
Allegro MicroSystems, Inc. Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com
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