TRS6707

STRS6707 ALLEGRO

Document overview

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Technical content

28113† OFF-LINE SWITCHING REGULATORS – WITH BIPOLAR SWITCHING TRANSISTOR OSC. OVER-CURRENT PROTECTION BASE COLLECTOR UVLO COMMON VIN Dwg. PK-001 INHIBIT FDBK FAULT LATCH REF. R S FAULT SINK DRIVE DRIVE The STR-S6707, STR-S6708, and STR-S6709 are specifically designed to meet the requirement for increased integration and reliabil- ity in off-line quasi-resonant flyback converters. These devices incorpo- rate the primary control and proportional drive circuit with a third- generation high-voltage bipolar switching transistor. Crucial system parameters such as maximum ON time and OFF time are fixed during manufacture. Local control circuit decoupling and layout are optimized within each device. Cycle-by-cycle current limiting, under-voltage lock-out with hyster- esis, over-voltage protection, and thermal shutdown protect these devices during all normal and overload conditions. Over-voltage protection and thermal shutdown are latched after a short delay. A versatile triple-level inhibit circuit includes the OFF time synchronization required to establish quasi-resonant operation. The inhibit function has also been expanded to initiate operation in stand-by mode in which the power supply delivers a small fraction of the steady-state output power. The dual requirements of dielectric isolation and low transient thermal impedance and steady-state thermal resistance are satisfied in an over- molded single-in-line power package. Proven in substantial volumes, these devices and their fixed- frequency counterparts represent a significant advance in off-line SMPS reliability growth and integration.

FEATURES

I Quasi-Resonant Operation for Low EMI and High Efficiency I Output Power to 220 W I Low-Power Output Standby Mode I Pulse-by-Pulse Over-Current Protection I Latched Over-Voltage and Thermal Protection I Third-Generation Switching Transistor with Proportional Drive I Maximum ON Time and Off Time Set During Manufacture I Internal Under-Voltage Lockout with Hysteresis I Over-Molded SIP with Integral Isolated Heat Spreader Always order by complete part number: Max. Cont. Peak Max. Sink Part Number Current, IC Current, ICM Current, IS STR-S6707 6 A 12 A 1.5 A STR-S6708 7.5 A 15 A 1.5 A STR-S6709 10 A 20 A 2 A ABSOLUTE MAXIMUM RATINGS Continuous Output Current, 1 ms Single-Pulse Output Current, Over-Current Protection Voltage Range, Output Junction Temperature, TJ .. +150°C Internal Frame Temperature, TF ... +125°C Operating Temperature Range, Storage Temperature Range, STR-S6707 THRU STR-S6709

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000 STR-S6707 THRU STR-S6709 OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATORS STR-S6707 AND STR-S6708 FUNCTIONAL BLOCK DIAGRAM ALLOWABLE PACKAGE POWER DISSIPATION MAXIMUM SAFE OPERATING AREA PROPORTIONAL DRIVE TSD OVER-VOLT. PROTECT OSC. R S Q V IN FDBK OVER-CURRENT PROTECTION COMMON COLLECTOR BASE SINK DRIVE 3300 pF 1 kΩ 0.7 Ω Rton Rtoff 0.75 V -1 V 1.4 V 5.1 V REF. FAULT LATCH INHIBIT Dwg. FK-001 UVLO 100 3.2 W 140 LIMITED BY FRAME TEMP. = +125°C MAX. RECOMMENDED MAX. FRAME TEMP. = +100°C FREE AIR 54 W TEMPERATURE in °C ALLOWABLE PACKAGE POWER DISSIPATION in WATTS MOUNTING SURFACE TEMPERATURE Dwg. GK-003-2 3.0 0.3 COLLECTOR-EMITTER VOLTAGE in VOLTS COLLECTOR CURRENT in AMPERES Dwg. GK-002 1.0 200 400 600 1000 0.5 5.0 800 STR-S6709 (20 A) STR-S6708 (15 A) STR-S6707 (12 A) L = 6 mH IB1 = 2.5 A (STR-S6707/08) or 3 A (STR-S6709) IB2 = 0.8 A (STR-SA6707/08) or 1.2 A (STR-S6709) ton = 100 µs dc < 1% Copyright © 1994 Allegro MicroSystems, Inc.

www.allegromicro.com STR-S6709 FUNCTIONAL BLOCK DIAGRAM AS ABOVE EXCEPT FOR SINK OUTPUT ELECTRICAL CHARACTERISTICS at TA = +25°C, VIN = 8.5 V, voltage measurements are refer- enced to Common (pin 2) (unless otherwise noted). Limits Characteristic Symbol Test Conditions Min. Typ. Max. Units On-State Voltage VINT Turn-on, increasing VIN 7.6 8.0 8.4 V Under-Voltage Lockout VINQ Turn-off, decreasing VIN 4.6 4.9 5.2 V Over-Voltage Threshold VOVP(th) 9.2 10.7 V Output Leakage Current ICEX VCE = 850 V, VBE = -1.5 V 100 µA Output Saturation Voltage VCE(sat) STR-S6707, IC = 2 A, IB = 400 mA 400 mV STR-S6708, IC = 3 A, IB = 600 mA 400 mV STR-S6709, IC = 4 A, IB = 800 mA 400 mV VBE(sat) STR-S6707, IC = 2 A, IB = 400 mA 1.5 V STR-S6708, IC = 3 A, IB = 600 mA 1.5 V STR-S6709, IC = 4 A, IB = 800 mA 1.5 V DC Current Gain hFE VCE = 4 V, IC = 1 A Maximum ON Time ton µs Minimum OFF Time toff µs Over-Current Threshold VOCP(th) -0.9 -1.0 -1.1 V Feedback Threshold Volt. VFDBK(th) 650 mV Inhibit Threshold Voltage VINH(th) Oscillation stops 0.65 0.75 0.85 V Oscillation synchronized 1.4 2.0 V Oscillation stops (fault latch set) 3.2 5.1 5.6 V Latch Holding Current IINH VIN reduced from 10.7 V to 4 V 500 µA Latch Reset Voltage VQ IIN ≤ 100 µA, VIN reduced from 10.7 V 2.5 3.1 V Supply Current IIN(ON) Operating mA IIN(OFF) 200 µA Insulation RMS Voltage VWM(RMS) All terminals simultaneous reference 2000 V metal plate against backside Thermal Shutdown TJ 125 150 Thermal Resistance RθJM Output junction to mounting surface 2.0 °C/W NOTES: Negative current is defined as coming out of (sourcing) the specified device terminal. Typical Data is for design information only. SINK 20 Ω

Worcester, Massachusetts 01615-0036 (508) 853-5000 STR-S6707 THRU STR-S6709 OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATORS TYPICAL CHARACTERISTICS 100 1.0 COLLECTOR CURRENT in AMPERES DC CURRENT GAIN Dwg. GK-001 3.0 0.01 0.1 1.0 100 5.0 0.03 0.3 3.0 V = 4 V CE STR-S6708 STR-S6707 STR-S6709

www.allegromicro.com TYPICAL QUASI-RESONANT FLYBACK CONVERTER WARNING: lethal potentials are present. See text. APPLICATIONS INFORMATION 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. Precau- tions 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: Recommended metal-oxide-filled, alkyl-degenerated oil base, silicone grease: Dow Corning 340, or equivalent VOLTAGE SENSE FULL-BRIDGE RECTIFIER AC INPUT

100 V/120 V

+ OUTPUT – OUTPUT Dwg. EK-004A R S Q

Worcester, Massachusetts 01615-0036 (508) 853-5000 STR-S6707 THRU STR-S6709 OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATORS 0.276 ±0.016 Dwg. MK-003-9 in 0.953 ±0.008 0.610 ±0.008 0.118 0.130 ±0.008 ø 1.49 ±0.012 0.016 0.100 ±0.004 0.709 ±0.008 0.216 ±0.008 0.216 0.130 ±0.004 0.026 +0.008 –0.004 0.177 ±0.028 PACKAGE CENTER LEAD CENTER 0.033 +0.008 –0.004 T REF. M Dimensions in Inches (for reference only) NOTE: Exact body and lead configuration at vendor’s option within limits shown.

www.allegromicro.com Dimensions in Millimeters (controlling dimensions) Dwg. MK-003-9 mm 24.2 ±0.2 15.5 ±0.2 3.0 3.3 ±0.2 ø 23.0 ±0.3 0.4 2.54 ±0.1 18.0 ±0.2 5.5 ±0.2 7.0 ±0.4 5.5 3.3 ±0.1 0.65 +0.2 –0.1 4.5 ±0.7 PACKAGE CENTER LEAD CENTER 0.85 +0.2 –0.1 T REF M NOTE: Exact body and lead configuration at vendor’s option within limits shown.

Worcester, Massachusetts 01615-0036 (508) 853-5000 STR-S6707 THRU STR-S6709 OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATORS SWITCHING REGULATOR PMCMs Part Number* Application VI Max PO Power Switch 3002M

5 V switching regulator and a

7.0-33 V 500 mA bipolar

9 V switching regulator†

5 V switching regulator and

7.0-33 V 500 mA bipolar Dual 9 V switching regulator 2 x 400 mA bipolar S5703 Quasi-resonant flyback converter 110/120 V 140 W 500 V 6 A bipolar S5707 Quasi-resonant flyback converter 85-265 V 90 W 850 V 6 A bipolar 220/240V 140 W S5708 Quasi-resonant flyback converter 85-265 V 120 W 850 V 7.5 A bipolar 220/240 V 180 W S6703 Quasi-resonant flyback converter 110/120V 140 W 500 V 6 A bipolar S6704 Quasi-resonant flyback converter 110/120 V 100 W 500 V 5 A bipolar S6707 Quasi-resonant flyback converter 85-265 V 90 W 850 V 6 A bipolar 220/240 V 140 W S6708 Quasi-resonant flyback converter 85-265 V 120 W 850 V 7.5 A bipolar 220/240 V 180 W S6709 Quasi-resonant flyback converter 85-265 V 160 W 850 V 10 A bipolar 220/240 V 220 W 8033S

3.3 V switching regulator

5.5-28 V 3 A bipolar 8050S

5.0 V switching regulator

7.0-40 V 3 A bipolar 8090S

9.0 V switching regulator

12 V switching regulator

15 V switching regulator

• Complete part number includes additional characters to indicate operating temperature range and/or package style. † Also includes linear regulator output for 15.7 V at 1.0 A. ‡ Without heat sink. 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.