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STR-G6651
Data Sheet
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
UVLO OVP TSD
GROUND
OVERCURRENT & FEEDBACK
SOURCE
SUPPLY
DRAIN
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.
28102.9A
2
1
3
4
VIN
OCP
Dwg. PK-011
ABSOLUTE MAXIMUM RATINGS at TA = +25C
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 . . . +150C Internal Frame Temperature, TF . . +125C Operating Temperature Range, TA . . . . . . . . . . . . . . . -20C to +125C Storage Temperature Range, TS . . . . . . . . . . . . . . . -40C to +125C
5
FEATURES
I Quasi-Resonant Operation I Output Power to 66 W I Low-Loss, Pulse-Ratio-Control Standby Mode I Temperature-Compensated Pulse-by-Pulse Over-Current Protection I Latched Over-Voltage and Thermal Protection I Under-Voltage Lockout with Hysteresis I Active Low-Pass Filter for Enhanced Light-Load Stability I Switched Attenuation of Leading-Edge Current-Sensing Signal I Regulated Soft Gate Drive I Adjustable Switching Speed for EMI Control I Overmolded Five-Pin Package
Always order by complete part number: STR-G6651 .
TM
STR-G6651 OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATOR
FUNCTIONAL BLOCK DIAGRAM
V IN 4 DRIVE REG. UVLO OVER-VOLT. PROTECT S REF. R FAULT LATCH Q 1 2 DRAIN SOURCE
TSD OSC
- + 1.45 V FEEDBACK & OVER-CURRENT PROTECTION
1.35 mA
- + 0.73 V 5 3
GROUND
Dwg. FK-002-5
ALLOWABLE PACKAGE POWER DISSIPATION
30
MAXIMUM SAFE OPERATING AREA
50
ALLOWABLE PACKAGE POWER DISSIPATION in WATTS
27 W
MOUNTING SURFACE TEMPERATURE
15
DRAIN CURRENT in AMPERES
20
5
LIMITED BY rDS(on)
tw
1.5
=0 .1 ms SIN =1 GL ms EP SIN UL SE GL EP UL SE
LIMITED BY VDS max
tw
LIMITED BY FRAME TEMP. = +125C MAX. 10
0.5 NO HEAT SINK NATURAL COOLING TA = +25C 0.15
FREE AIR CONTROLLER 1.5 W 0.8 W 0 20 60 100 TEMPERATURE in C 140
Dwg. GK-003-4
0.05 3.0 10 30 100 300 1000
Dwg. GK-004-5
DRAIN-SOURCE VOLTAGE in VOLTS
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright (c) 1999, 2000 Allegro MicroSystems, Inc.
TM
STR-G6651 OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATOR
ELECTRICAL CHARACTERISTICS at TA = +25C, VIN = 18 V, VDD = 10 V, VS = 0, voltage measurements are referenced to ground terminal (unless otherwise specified).
Limits Characteristic On-State Voltage Under-Voltage Lockout Over-Voltage Threshold Drain-Source Breakdown Voltage Drain Leakage Current On-State Resistance Maximum OFF Time Minimum Pulse Duration for Input of Quasi-Resonant Signals Minimum OFF Time Feedback Threshold Voltage Symbol VINT VINQ VOVP(th) V(BR)DSS IDSS rDS(on) toff tw(th) toff VFDBK Test Conditions Turn-on, increasing VIN Turn-off, decreasing VIN Turn-off, increasing VIN ID = 300 A VDS = 650 V VS = 10 V, ID = 0.9 A, TJ = +25C Drain waveform high Drain waveform high1 Drain waveform high1 Drain waveform low to high1 Oscillation synchronized2 Over-Current Protection/Feedback Sink Current Latch Holding Current Latch Release Voltage Switching Time Supply Current IOCP/FB IIN(OVP) VIN tf IIN(ON) IIN(OFF) Insulation RMS Voltage Thermal Shutdown Thermal Resistance VWM(RMS) TJ RJM Output junction-to-mounting frame VOCP/FB = 1.0 V VIN reduced from 24.5 V to 8.5 V IIN 20 A, VIN reduced from 24.5 V VDD = 200 V, ID = 0.9 A Operating3 Increasing VIN prior to oscillation All terminals simultaneous reference metal plate against backside Min. 14.4 9.0 20.5 650 - - 45 - - 0.68 1.3 1.2 - 6.6 - - - 2000 140 - Typ. 16 10 22.5 - - - - - - 0.73 1.45 1.35 - - - - - - - - Max. 17.6 11 24.5 - 300 3.95 55 1.0 1.5 0.78 1.6 1.5 400 8.4 250 30 100 - - 1.63 Units V V V V A s s s V V mA mA V ns mA A V C C/W
Notes: Typical Data is for design information only. 1. Feedback is square wave, VIM = 2.2 V, th = 1 s, tl = 35 s 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 s, tl = 1 s
www.allegromicro.com
STR-G6651 OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATOR
ALLOWABLE AVALANCHE ENERGY
200
ALLOWABLE AVALANCHE ENERGY in mJ
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 Drain-Source Drain-Source Output Breakdown Voltage ON Resistance at ID = 300 A at ID = 0.9 A V(BR)DS, Minimum rDS(on), Maximum For 100/120 V AC Input STR-G6622 STR-G6624 STR-G6632 STR-G6651 STR-G6652 STR-G6653 450 V 450 V 500 V 650 V 650 V 650 V 2.18 0.92 For 110/120 V AC Input 2.62 For 200/220 V AC Input 3.95 2.80 1.95 66 W 86 W 120 W 36 W - 50 W 44 W - 60 W 98 W - 130 W
Part Number
Output Power
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
TM
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. UVLO OVER-VOLT. PROTECT S R FAULT LATCH Q 1 2
VOLTAGE SENSE
FULL-BRIDGE RECTIFIER
REF.
AC INPUT
+
TSD OSC
+
1.35 mA
- OUTPUT
- + 1.45 V
- + 0.73 V
5
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
0.008
0.126 o
0.008
0.110
0.008
0.157 0.008 0.311
0.008
0.665
Dimensions in Inches
(for reference only)
0.012
0.067
0.004
0.102
0.004
0.343
0.020 1 5
0.161 0.020 0.181 REF
0.033
+0.008 -0.004
0.018
+0.008 -0.004
0.200
0.024
AT TIPS Dwg. MK-003-5 in
0.165 0.008
10
0.2
3.2 o
0.2
2.8
0.2
4.0 0.2 16.9
7.9
0.2
Dimensions in Millimeters
(controlling dimensions)
0.3
1.7
0.1
2.6
0.1
8.7
0.5 1 5
4.1 0.5 4.6 REF
0.85
+0.2 -0.1
0.45
+0.2 -0.1
5.08
0.6
AT TIPS Dwg. MK-003-5 mm
4.2 0.2
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
TM
STR-G6651 OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATOR
STR-G6651-LF
(LF1128)
0.394
0.008
0.126 o
0.008
0.110
0.008
0.157 0.008 0.311
0.008
0.665
0.012
Dimensions in Inches
(for reference only)
0.067
0.004
0.102
0.004
0.217 0.020 0.531 0.033
+0.008 -0.004 1 5
REF
0.224 REF 0.018
+0.008 -0.004
0.291 REF
0.079
0.020
0.165 0.008
0.157
0.020
Dwg. MK-003-51 in
10.0
0.2
3.2 o
0.2
2.8
0.2
4.0 0.2 16.9
0.3
7.9
0.2
Dimensions in Millimeters
(controlling dimensions)
1.7
0.1
2.6
0.1
5.5 0.5 13.5 0.85
+0.2 -0.1 1 5
REF
5.7 REF 0.45
+0.2 -0.1
7.4 REF
2.0
0.5
4.2 0.2
4.0
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
TM

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