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STR-S5703
OFF-LINE SWITCHING REGULATOR - WITH BIPOLAR SWITCHING TRANSISTOR
COLLECTOR 1
COMMON
2
FAULT
The STR-S5703 is specifically designed to meet the requirement for increased integration and reliability in off-line quasi-resonant flyback converters with indirect feedback. The device incorporates 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 hysteresis, 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 primary-side error amplifier with reference is included to facilitate regulation from an auxiliary or bias winding of the power transformer. 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 overmolded single-in-line power package. Proven in substantial volumes, this device and its fixed-frequency counterparts represents a significant advance in off-line SMPS reliability growth and integration. Similar devices with increased ratings are the STR-S5707 and STR-S5708.
Data Sheet 28114.1*
BASE
3 S
FAULT LATCH
SINK
4
DRIVE
OSC.
R OVER-CURRENT PROTECTION INHIBIT 5
+
6
+ REF. +
32 V SENSE
7
DRIVE
8
UVLO
V IN
9
Dwg. PK-004
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VIN ........................... 15 V Output Voltage, VCEX ....................... 500 V VEBO ................................................ 7 V Continuous Output Current, IC .................................................. 6.0 A 1 ms Single-Pulse Output Current, ICM ................................................. 12 A Sink Current, IS ................................. 1.5 A Drive Current, ID .......................... -700 mA Inhibit Voltage, VINH ........................... 15 V Over-Current Protection Voltage Range, VOCP ............................................ 3.5 V Insulation Voltage, VWM(RMS) .......... 2000 V Package Power Diss., PD ........ See Graph Output Junction Temperature, TJ .. +150C Internal Frame Temperature, TF ... +125C Operating Temperature Range, TA ............................... -20C to +125C Storage Temperature Range, Tstg ............................. -40C to +125C
FEATURES
I I I I I I I I I I Quasi-Resonant Operation for Low EMI and High Efficiency Output Power to 140 W Low-Power Output Standby Mode Indirect Feedback from Auxiliary Winding Reduces External Component Count Pulse-by-Pulse Over-Current Protection Latched Over-Voltage and Thermal Protection Third-Generation Switching Transistor with Proportional Drive Maximum ON Time and Off Time Set During Manufacture Internal Under-Voltage Lockout with Hysteresis Over-Molded SIP with Integral Isolated Heat Spreader
Always order by complete part number: STR-S5703 .
TM
STR-S5703 OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATOR
FUNCTIONAL BLOCK DIAGRAM
V IN 9 INHIBIT 6
UVLO SENSE 7 OVER-VOLT. PROTECT
R FAULT LATCH S Q PROPORTIONAL DRIVE 1 k 8 DRIVE
REF.
4 TSD OSC. 3 Rton 1500 pF + 0.75 V + 3300 pF Rtoff + 1.4 V -1 V 5 + 5.1 V 2 1
SINK
BASE
COLLECTOR
COMMON
OVER-CURRENT PROTECTION
Dwg. FK-001-1
ALLOWABLE PACKAGE POWER DISSIPATION
30
MAXIMUM SAFE OPERATING AREA
60
ALLOWABLE PACKAGE POWER DISSIPATION in WATTS
54 W
MOUNTING SURFACE TEMPERATURE
10
40
RECOMMENDED MAX. FRAME TEMP. = +100C
COLLECTOR CURRENT in AMPERES
5.0
3.0 L = 6 mH IB1 = 2.5 A IB2 = 0.8 A ton = 100 s dc < 1% 1.0
LIMITED BY FRAME TEMP. = +125C MAX. 20
FREE AIR
0.5
3.2 W 0 20 60 100 TEMPERATURE in C 140
Dwg. GK-003-2
0.3 0 100 200 300 400 500 600 700
Dwg. GK-002-2A
COLLECTOR-EMITTER VOLTAGE in VOLTS
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright (c) 1994 Allegro MicroSystems, Inc.
TM
STR-S5703 OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATOR
ELECTRICAL CHARACTERISTICS at TA = +25C, VIN = 8.5 V, voltage measurements are referenced to Common (pin 2) (unless otherwise noted).
Limits Characteristic On-State Voltage Under-Voltage Lockout Over-Voltage Threshold Output Leakage Current Output Saturation Voltage Symbol VINT VINQ VOVP(th) ICEX VCE(sat) VBE(sat) DC Current Gain Maximum ON Time Minimum OFF Time Over-Current Threshold Sense Voltage Inhibit Threshold Voltage hFE ton toff VOCP(th) VSENSE VINH(th) ISENSE = 3.2 mA Oscillation stops Oscillation synchronized Oscillation stops (fault latch set) Latch Holding Current Latch Reset Voltage Ref. Voltage Temp. Coeff. Supply Current IINH VQ VZ IIN(ON) IIN(OFF) Insulation RMS Voltage Thermal Shutdown Thermal Resistance VWM(RMS) TJ RJM Output junction to mounting surface All terminals simultaneous reference metal plate against backside VIN reduced from 10.7 V to 4 V IIN 100 A, VIN reduced from 10.7 V -20C TF +100C, IIN = 3.2 mA Operating VCE = 500 V, VBE = -1.5 V IC = 2 A, IB = 400 mA IC = 2 A, IB = 400 mA VCE = 4 V, IC = 1 A Test Conditions Turn-on, increasing VIN Turn-off, decreasing VIN Min. Typ. Max. 7.6 4.6 9.2 - - - 23 33 45 8.0 4.9 - - - - - - - 8.4 5.2 10.7 100 400 1.5 46 41 55 -1.12 32.3 0.85 2.0 5.8 500 - - 28 200 - - - Units V V V A mV V - s s V V V V V A V mV/C mA A V C C/W
-0.88 -1.0 31.7 0.65 - 3.2 - 2.5 - 15 - 2000 125 - 32.0 0.75 1.4 5.1 - 3.1 2.5 - - - 150 2.0
NOTES: Negative current is defined as coming out of (sourcing) the specified device terminal. Typical Data is for design information only.
www.allegromicro.com
STR-S5703 OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATOR
TYPICAL CHARACTERISTICS
100
50
30
DC CURRENT GAIN
VCE 4 V = 10
5.0
3.0
1.0 0.01 0.03 0.1 1.0 10 0.3 3.0 COLLECTOR CURRENT in AMPERES 30 100
Dwg. GK-001-1
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
TM
STR-S5703 OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATOR
TYPICAL QUASI-RESONANT FLYBACK CONVERTER
WARNING: lethal potentials are present. See below.
+ OUTPUT
7
9
6
R
S
Q
8
FULL-BRIDGE RECTIFIER
AC INPUT
3
+
1
+
2
+ 5 +
#
Dwg. EK-005A
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. 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 metal-oxide-filled, alkyl-degenerated oil base, silicone grease: Dow Corning 340, or equivalent
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+
+
4
+ + - OUTPUT
+
STR-S5703 OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATOR
Dimensions in Inches
(for reference only)
0.953 0.008 0.610
0.008
0.118
0.008
REF. M 0.130 o
T
0.216
0.008
1.49 0.012
0.709 0.008
0.130
0.004
0.276
0.016
0.216 1 0.033
+0.008 -0.004
0.016
9 0.100
0.004
0.026 0.177
0.028 +0.008 -0.004
PACKAGE CENTER
LEAD CENTER
Dwg. MK-003-9 in
NOTE: Exact body and lead configuration at vendor's option within limits shown.
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
TM
STR-S5703 OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATOR
Dimensions in Millimeters
(controlling dimensions)
24.2 0.2 15.5 0.2 3.0 REF M 3.3 o
0.2
T
5.5
0.2
23.0 0.3
18.0 0.2
3.3
0.1
7.0
0.4
5.5 1 0.85
+0.2 -0.1
0.4
9 2.54
0.1
0.65
+0.2 -0.1
4.5
0.7
PACKAGE CENTER
LEAD CENTER
Dwg. MK-003-9 mm
NOTE: Exact body and lead configuration at vendor's option within limits shown.
www.allegromicro.com
STR-S5703 OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATOR
SWITCHING REGULATOR PMCMs
Part Number* 3002M 3004M S5703 S5707 S5708 S6703 S6704 S6707 S6708 S6709 8033S 8050S 8090S 8120S 8150S Application 5 V switching regulator and a 9 V switching regulator 5 V switching regulator and Dual 9 V switching regulator Quasi-resonant flyback converter Quasi-resonant flyback converter Quasi-resonant flyback converter Quasi-resonant flyback converter Quasi-resonant flyback converter Quasi-resonant flyback converter Quasi-resonant flyback converter Quasi-resonant flyback converter 3.3 V switching regulator 5.0 V switching regulator 9.0 V switching regulator 12 V switching regulator 15 V switching regulator VI 7.0-33 V 7.0-33 V 110/120 V 85-265 V 220/240V 85-265 V 220/240 V 110/120V 110/120 V 85-265 V 220/240 V 85-265 V 220/240 V 85-265 V 220/240 V 5.5-28 V 7.0-40 V 12-40V 15-40 V 18-40 V Max PO - - 140 W 90 W 140 W 120 W 180 W 140 W 100 W 90 W 140 W 120 W 180 W 160 W 220 W - - - - - - - - - 500 V 850 V 850 V 500 V 500 V 850 V 850 V 850 V - - - - - Power Switch 500 mA 400 mA 500 mA 2 x 400 mA 6A 6A 7.5 A 6A 5A 6A 7.5 A 10 A 3A 3A 3A 3A 3A bipolar bipolar bipolar bipolar bipolar bipolar bipolar bipolar bipolar bipolar bipolar bipolar bipolar bipolar bipolar bipolar bipolar
* 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.
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
TM

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