28102.9A Data Sheet STR-G6651 OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATOR The STR-G6651 is specifically designed to satisfy the requirements for increased integration and reliability in off-line quasi-resonant flyback converters. This device incorporates the primary control and drive circuit with a discrete avalanche-rated power MOSFET. FDBK OSC. LATCH 2 3 4 5 SOURCE GROUND SUPPLY OVERCURRENT & FEEDBACK OCP 1 DRAIN VIN UVLO OVP TSD Dwg. PK-011 ABSOLUTE MAXIMUM RATINGS at TA = +25°C Control Supply Voltage, VIN . . . . . . . 35 V Drain-Source Voltage, VDS . . . . . . . . 650 V Drain Current, ID continuous . . . . . . . . . . . . . . . . . . 2.7 A single-pulse, tw ≤ 1 ms . . . . . . . . 7.2 A Avalanche Energy, EAS single-pulse . . . . . . . . . . . . . . . 158 mJ Over-Current Protection Voltage Range, VOCP . . . . . . . . . . . . . . . -0.3 V to +6 V Insulation RMS Voltage, VWM(RMS) . . . . . . . . . . . . . . . . . . 2000 V Package Power Dissipation, PD control (VIN x IIN(ON)) . . . . . . . . . 0.8 W total . . . . . . . . . . . . . . . . . . . See Graph FET Channel Temperature, TJ . . . +150°C Internal Frame Temperature, TF . . +125°C Operating Temperature Range, TA . . . . . . . . . . . . . . . -20°C to +125°C Storage Temperature Range, TS . . . . . . . . . . . . . . . -40°C to +125°C Cycle-by-cycle current limiting, under-voltage lockout with hysteresis, over-voltage protection, and thermal shutdown protects the power supply during the normal overload and fault conditions. Over-voltage protection and thermal shutdown are latched after a short delay. The latch may be reset by cycling the input supply. Low-current startup and a low-power standby mode selected from the secondary circuit completes a comprehensive suite of features. The device is provided in a five-pin over-molded TO-220 style package, affording dielectric isolation without compromising thermal characteristics. Two lead forms are available (with and without the suffix ‘-LF’) to accommodate printed wiring board layout or mechanical constraints. Proven in substantial volumes, the STR-G6651 is a robust low-risk solution for off-line power supplies particularly where management of EMI at the source is a significant element of the system design. FEATURES ■ Quasi-Resonant Operation ■ Output Power to 66 W ■ Low-Loss, Pulse-Ratio-Control Standby Mode ■ Temperature-Compensated Pulse-by-Pulse Over-Current Protection ■ Latched Over-Voltage and Thermal Protection ■ Under-Voltage Lockout with Hysteresis ■ Active Low-Pass Filter for Enhanced Light-Load Stability ■ Switched Attenuation of Leading-Edge Current-Sensing Signal ■ Regulated Soft Gate Drive ■ Adjustable Switching Speed for EMI Control ■ Overmolded Five-Pin Package Always order by complete part number: STR-G6651 . ™ STR-G6651 OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATOR FUNCTIONAL BLOCK DIAGRAM V IN 4 DRIVE REG. R UVLO OVER-VOLT. PROTECT FAULT LATCH S 1 DRAIN 2 SOURCE 5 FEEDBACK & OVER-CURRENT PROTECTION 3 GROUND Q REF. TSD 1.35 mA OSC – + 1.45 V – + 0.73 V Dwg. FK-002-5 MAXIMUM SAFE OPERATING AREA ALLOWABLE PACKAGE POWER DISSIPATION 27 W 50 MOUNTING SURFACE TEMPERATURE 15 LIMITED BY FRAME TEMP. = +125°C MAX. 10 FREE AIR tw LIMITED BY rDS(on) 5 tw 1.5 =0 .1 ms SIN =1 GL ms EP SIN UL SE GL EP UL SE LIMITED BY VDS max 20 DRAIN CURRENT in AMPERES ALLOWABLE PACKAGE POWER DISSIPATION in WATTS 30 0.5 NO HEAT SINK NATURAL COOLING TA = +25°C 0.15 CONTROLLER 1.5 W 0.8 W 0 0.05 20 60 100 TEMPERATURE in °C 140 3.0 10 30 100 300 1000 DRAIN-SOURCE VOLTAGE in VOLTS Dwg. GK-003-4 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1999, 2000 Allegro MicroSystems, Inc. Dwg. GK-004-5 ™ STR-G6651 OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATOR ELECTRICAL CHARACTERISTICS at TA = +25°C, VIN = 18 V, VDD = 10 V, VS = 0, voltage measurements are referenced to ground terminal (unless otherwise specified). Limits Characteristic Symbol Test Conditions Min. Typ. Max. Units On-State Voltage VINT Turn-on, increasing VIN 14.4 16 17.6 V Under-Voltage Lockout VINQ Turn-off, decreasing VIN 9.0 10 11 V Over-Voltage Threshold VOVP(th) Turn-off, increasing VIN 20.5 22.5 24.5 V Drain-Source Breakdown Voltage V(BR)DSS ID = 300 µA 650 – – V IDSS VDS = 650 V – – 300 µA VS = 10 V, ID = 0.9 A, TJ = +25°C – – 3.95 Ω Drain Leakage Current On-State Resistance rDS(on) Maximum OFF Time toff Drain waveform high 45 – 55 µs tw(th) Drain waveform high1 – – 1.0 µs toff Drain waveform high1 – – 1.5 µs Drain waveform low to high1 0.68 0.73 0.78 V Oscillation synchronized2 1.3 1.45 1.6 V 1.2 1.35 1.5 mA Minimum Pulse Duration for Input of Quasi-Resonant Signals Minimum OFF Time Feedback Threshold Voltage VFDBK Over-Current Protection/Feedback Sink Current IOCP/FB VOCP/FB = 1.0 V Latch Holding Current IIN(OVP) VIN reduced from 24.5 V to 8.5 V – – 400 mA Latch Release Voltage VIN IIN ≤ 20 µA, VIN reduced from 24.5 V 6.6 – 8.4 V VDD = 200 V, ID = 0.9 A – – 250 ns Switching Time tf Supply Current IIN(ON) Operating3 – – 30 mA IIN(OFF) Increasing VIN prior to oscillation – – 100 µA VWM(RMS) All terminals simultaneous reference metal plate against backside 2000 – – V 140 – – °C – – 1.63 °C/W Insulation RMS Voltage Thermal Shutdown TJ Thermal Resistance RθJM Output junction-to-mounting frame Notes: Typical Data is for design information only. 1. Feedback is square wave, VIM = 2.2 V, th = 1 µs, tl = 35 µs 2. For quasi-resonant operation, the input signal must be longer than tw(th) and greater than VFDBK 3. Feedback is square wave, VIM = 2.2 V, th = 4 µs, tl = 1 µs www.allegromicro.com STR-G6651 OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATOR ALLOWABLE AVALANCHE ENERGY ALLOWABLE AVALANCHE ENERGY in mJ 200 150 SINGLE PULSE DRAIN CURRENT = 1.8 A 100 50 0 0 20 40 80 120 60 100 STARTING CHANNEL TEMPERATURE in °C 140 160 Dwg. GK-009-2 STR-G6600 Series Part Number Drain-Source Drain-Source Output Breakdown Voltage ON Resistance at ID = 300 µA at ID = 0.9 A V(BR)DS, Minimum rDS(on), Maximum Output Power For 100/120 V AC Input STR-G6622 450 V 2.18 Ω 44 W – 60 W STR-G6624 450 V 0.92 Ω 98 W – 130 W For 110/120 V AC Input STR-G6632 500 V 2.62 Ω 36 W – 50 W For 200/220 V AC Input STR-G6651 650 V 3.95 Ω 66 W STR-G6652 650 V 2.80 Ω 86 W STR-G6653 650 V 1.95 Ω 120 W 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 ™ STR-G6651 OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATOR TYPICAL QUASI-RESONANT FLYBACK CONVERSION USING STR-G6651 WARNING: lethal potentials are present. See text. + OUTPUT 4 DRIVE REG. OVER-VOLT. PROTECT FAULT LATCH AC INPUT S FULL-BRIDGE RECTIFIER 1 R UVLO 2 VOLTAGE SENSE Q REF. + TSD OSC – OUTPUT 1.35 mA + – + 1.45 V 5 – + 0.73 V 3 ★ Dwg. EK-003-4A WARNING — These devices are designed to be operated at lethal voltages and energy levels. Circuit designs that embody these components must conform with applicable safety requirements. Precautions must be taken to prevent accidental contact with power-line potentials. Do not connect grounded test equipment. The use of an isolation transformer is recommended during circuit development and breadboarding. Recommended mounting hardware torque: 4.34 - 5.79 lbf•ft (6 – 8 kg•cm or 0.588 – 0.784 Nm). Recommended silicone grease: Dow Corning SC102, Toshiba YG6260, Shin-Etsu G746., or equivalent www.allegromicro.com STR-G6651 OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATOR STR-G6651 (LF1129) 0.394 0.126 ø ± 0.008 0.110 ± 0.008 ± 0.008 0.157 ± 0.008 0.311 ± 0.008 0.665 Dimensions in Inches ± 0.012 (for reference only) 0.067 0.102 ± 0.004 ± 0.004 0.343 ± 0.020 1 0.161 ± 0.020 0.181 REF 5 0.033 0.018 +0.008 –0.004 +0.008 –0.004 0.200 ±0.024 0.165 ± 0.008 AT TIPS Dwg. MK-003-5 in 10 3.2 ø ± 0.2 2.8 ± 0.2 4.0 ± 0.2 ± 0.2 7.9 ± 0.2 16.9 Dimensions in Millimeters ± 0.3 (controlling dimensions) 1.7 2.6 ± 0.1 ± 0.1 8.7 ± 0.5 1 4.1 ± 0.5 4.6 REF 5 0.85 0.45 +0.2 –0.1 +0.2 –0.1 4.2 ± 0.2 5.08 ±0.6 AT TIPS Dwg. MK-003-5 mm 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 ™ STR-G6651 OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATOR STR-G6651-LF (LF1128) 0.394 0.126 ø ± 0.008 0.110 ± 0.008 ± 0.008 0.157 ± 0.008 0.311 ± 0.008 0.665 ± 0.012 Dimensions in Inches (for reference only) 0.067 0.102 ± 0.004 ± 0.004 0.217 ± 0.020 0.531 +0.008 –0.004 0.224 REF REF 0.033 1 0.291 REF 5 0.018 +0.008 –0.004 0.165 ± 0.008 0.157 0.079 ±0.020 ±0.020 Dwg. MK-003-51 in 10.0 3.2 ø ± 0.2 2.8 ± 0.2 4.0 ± 0.2 ± 0.2 7.9 ± 0.2 16.9 ± 0.3 Dimensions in Millimeters (controlling dimensions) 1.7 2.6 ± 0.1 ± 0.1 5.5 ± 0.5 13.5 REF 0.85 +0.2 –0.1 1 5.7 REF 0.45 +0.2 –0.1 4.2 ± 0.2 7.4 REF 5 4.0 2.0 ±0.5 ±0.5 Dwg. MK-003-51 mm www.allegromicro.com STR-G6651 OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATOR The products described here are manufactured in Japan by Sanken Electric Co., Ltd. for sale by Allegro MicroSystems, Inc. Sanken Electric Co., Ltd. and Allegro MicroSystems, Inc. reserve the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the performance, reliability, or manufacturability of their products. Therefore, the user is cautioned to verify that the information in this publication is current before placing any order. These products are not authorized for use as critical components in life-support appliances, devices, or systems without express written approval. The information included herein is believed to be accurate and reliable. However, Sanken Electric Co., Ltd. and Allegro MicroSystems, Inc. assume no responsibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 ™