Data Sheet
28114A*
STR-S5707 AND
STR-S5708
OFF-LINE SWITCHING REGULATORS
– WITH BIPOLAR SWITCHING TRANSISTOR
COLLECTOR
1
COMMON
2
BASE
3
SINK
4
The STR-S5707 and STR-S5708 are specifically designed to meet
the requirement for increased integration and reliability in off-line quasiresonant flyback converters with indirect feedback. Each device
incorporates the primary control and proportional drive circuit with a
third-generation high-voltage bipolar switching transistor.
T
C
.
U
Y
L
D
8
N
O
0
7
O
R
6
P E R-S
T
C
D
S
E
N
d
n
E
U
a
R
N
7
I
0
E
7
T
6
F
N
S
E
R
O
R
T
C
S
R
y
S O b
I
D F ced
a
l
— ep
FAULT
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.
S
DRIVE
OSC.
FAULT
LATCH
R
OVER-CURRENT
PROTECTION
5
INHIBIT
6
32 V SENSE
7
DRIVE
8
V IN
9
+
+
REF.
+
UVLO
Dwg. PK-004
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VIN ........................... 15 V
Output Voltage, VCEX ....................... 850 V
VEBO ................................................ 7 V
Continuous Output Current,
IC .......................................... See Table
1 ms Single-Pulse Output Current,
ICM ........................................ See Table
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 .. +150°C
Internal Frame Temperature, TF ... +125°C
R
Operating Temperature Range,
TA ............................... -20°C to +125°C
Storage Temperature Range,
Tstg ............................. -40°C to +125°C
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.
FEATURES
■ Quasi-Resonant Operation for Low EMI and High Efficiency
■ 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:
Part
Output Current
Number
Continuous, IC Peak, ICM
STR-S5707
STR-S5708
™
6A
7.5 A
12 A
15 A
Output Power, PO
Wide AC In 220/240 VAC In
90 W
120 W
140 W
180 W
STR-S5707 AND STR-S5708
OFF-LINE
QUASI-RESONANT FLYBACK
SWITCHING REGULATORS
FUNCTIONAL BLOCK DIAGRAM
V IN
INHIBIT
6
9
R
UVLO
SENSE
OVER-VOLT.
PROTECT
7
FAULT
LATCH
S
PROPORTIONAL
DRIVE
Q
1 kΩ
REF.
8
DRIVE
4
SINK
3
BASE
1
COLLECTOR
2
COMMON
5
OVER-CURRENT
PROTECTION
TSD
OSC.
Rton
1500 pF
+
0.75 V
+
3300 pF
1.4 V
Rtoff
-1 V
+
+
5.1 V
Dwg. FK-001-1
ALLOWABLE PACKAGE POWER DISSIPATION
MAXIMUM SAFE OPERATING AREA
30
54 W
MOUNTING SURFACE
TEMPERATURE
STR-S5708 (15 A)
STR-S5707 (12 A)
RECOMMENDED MAX.
FRAME TEMP. = +100°C
40
LIMITED BY FRAME
TEMP. = +125°C MAX.
20
COLLECTOR CURRENT in AMPERES
ALLOWABLE PACKAGE POWER DISSIPATION in WATTS
60
10
5.0
3.0
L = 6 mH
IB1 = 2.5 A
IB2 = 0.8 A
ton = 100 µs
dc < 1%
1.0
FREE AIR
0.5
3.2 W
0.3
0
20
60
100
TEMPERATURE in °C
140
0
200
400
600
800
1000
COLLECTOR-EMITTER VOLTAGE in VOLTS
Dwg. GK-003-2
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1994 Allegro MicroSystems, Inc.
Dwg. GK-002-1A
™
STR-S5707 AND STR-S5708
OFF-LINE
QUASI-RESONANT FLYBACK
SWITCHING REGULATORS
ELECTRICAL CHARACTERISTICS at TA = +25°C, VIN = 8.5 V, voltage measurements are referenced 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
Ð
10.7
V
Output Leakage Current
ICEX
VCE = 850 V, VBE = -1.5 V
Ð
Ð
100
µA
STR-S5707, IC = 2 A, IB = 400 mA
Ð
Ð
400
mV
STR-S5708, IC = 3 A, IB = 600 mA
Ð
Ð
400
mV
STR-S5707, IC = 2 A, IB = 400 mA
Ð
Ð
1.5
V
STR-S5708, IC = 3 A, IB = 600 mA
Ð
Ð
1.5
V
VCE = 4 V, IC = 1 A
29
Ð
61
Ð
Output Saturation Voltage
VCE(sat)
VBE(sat)
DC Current Gain
hFE
Maximum ON Time
ton
33
Ð
41
µs
Minimum OFF Time
toff
45
Ð
55
µs
-0.88 -1.0
-1.12
V
Over-Current Threshold
VOCP(th)
Sense Voltage
VSENSE
ISENSE = 3.2 mA
31.7
32.0
32.3
V
Inhibit Threshold Voltage
VINH(th)
Oscillation stops
0.65
0.75
0.85
V
Ð
1.4
2.0
V
Oscillation stops (fault latch set)
3.2
5.1
5.8
V
Ð
Ð
500
µA
2.5
3.1
Ð
V
Oscillation synchronized
Latch Holding Current
IINH
VIN reduced from 10.7 V to 4 V
Latch Reset Voltage
VQ
IIN ≤ 100 µA, VIN reduced from 10.7 V
Ref. Voltage Temp. Coeff.
αVZ
-20°C ≤ TF ≤ +100°C, IIN = 3.2 mA
Ð
2.5
Ð
mV/°C
Operating
15
Ð
28
mA
Ð
Ð
200
µA
2000
Ð
Ð
V
125
150
Ð
°C
Ð
2.0
Ð
°C/W
Supply Current
IIN(ON)
IIN(OFF)
Insulation RMS Voltage
VWM(RMS)
Thermal Shutdown
TJ
Thermal Resistance
RθJM
All terminals simultaneous reference
metal plate against backside
Output junction to mounting surface
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-S5707 AND STR-S5708
OFF-LINE
QUASI-RESONANT FLYBACK
SWITCHING REGULATORS
TYPICAL CHARACTERISTICS
100
50
DC CURRENT GAIN
30
VCE= 4 V
10
STR-S5708
STR-S5707
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-001-2
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
™
STR-S5707 AND STR-S5708
OFF-LINE
QUASI-RESONANT FLYBACK
SWITCHING REGULATORS
TYPICAL QUASI-RESONANT FLYBACK CONVERTER
WARNING: lethal potentials are present. See below.
+ OUTPUT
+
6
9
+
7
R
+
FULL-BRIDGE
RECTIFIER
8
Q
4
+
+
AC INPUT
S
3
Ð OUTPUT
+
+
1
2
+
5
+
★
Dwg. EK-005A
APPLICATIONS INFORMATION
WARNING Ñ 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 Ð 5.79 lbf¥ft (6 Ð 8 kg¥cm or 0.588 Ð 0.784 Nm).
Recommended metal-oxide-filled, alkyl-degenerated oil base, silicone grease:
Dow Corning 340, or equivalent
www.allegromicro.com
STR-S5707 AND STR-S5708
OFF-LINE
QUASI-RESONANT FLYBACK
SWITCHING REGULATORS
Dimensions in Inches
(for reference only)
0.953 ±0.008
T M REF.
0.610
0.130 ¿
±0.008
0.216
±0.008
±0.008
0.709 ±0.008
1.49 ±0.012
0.118
0.130
±0.004
0.276
±0.016
0.216
1
0.016
0.033
9
0.100
0.026
±0.004
+0.008
Ð0.004
0.177
+0.008
Ð0.004
±0.028
PACKAGE
CENTER
LEAD
CENTER
Dwg. MK-003-9 in
NOTE: Exact body and lead configuration at vendorÕs option within limits shown.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
™
STR-S5707 AND STR-S5708
OFF-LINE
QUASI-RESONANT FLYBACK
SWITCHING REGULATORS
Dimensions in Millimeters
(controlling dimensions)
24.2 ±0.2
T M REF
15.5 ±0.2
3.3 ¿
5.5
±0.2
±0.2
18.0 ±0.2
23.0 ±0.3
3.0
3.3
±0.1
7.0
±0.4
5.5
1
0.85
0.4
9
2.54
±0.1
+0.2
Ð0.1
0.65
+0.2
Ð0.1
4.5
±0.7
PACKAGE
CENTER
LEAD
CENTER
Dwg. MK-003-9 mm
NOTE: Exact body and lead configuration at vendorÕs option within limits shown.
www.allegromicro.com
STR-S5707 AND STR-S5708
OFF-LINE
QUASI-RESONANT FLYBACK
SWITCHING REGULATORS
SWITCHING REGULATOR PMCMs
Part
Number*
VI
Max PO
3002M
Application
5 V switching regulator and a
9 V switching regulator
7.0-33 V
—
—
—
Power Switch
500 mA
400 mA
bipolar
bipolar
3004M
5 V switching regulator and
Dual 9 V switching regulator
7.0-33 V
—
—
—
500 mA
2 x 400 mA
bipolar
bipolar
S5703
Quasi-resonant flyback converter
110/120 V
140 W
500 V
6A
bipolar
S5707
Quasi-resonant flyback converter
85-265 V
220/240V
90 W
140 W
850 V
6A
bipolar
S5708
Quasi-resonant flyback converter
85-265 V
220/240 V
120 W
180 W
850 V
7.5 A
bipolar
S6703
Quasi-resonant flyback converter
110/120V
140 W
500 V
6A
bipolar
S6704
Quasi-resonant flyback converter
110/120 V
100 W
500 V
5A
bipolar
S6707
Quasi-resonant flyback converter
85-265 V
220/240 V
90 W
140 W
850 V
6A
bipolar
S6708
Quasi-resonant flyback converter
85-265 V
220/240 V
120 W
180 W
850 V
7.5 A
bipolar
S6709
Quasi-resonant flyback converter
85-265 V
220/240 V
160 W
220 W
850 V
10 A
bipolar
8033S
3.3 V switching regulator
5.5-28 V
—
—
3A
bipolar
8050S
5.0 V switching regulator
7.0-40 V
—
—
3A
bipolar
8090S
9.0 V switching regulator
12-40V
—
—
3A
bipolar
8120S
12 V switching regulator
15-40 V
—
—
3A
bipolar
8150S
15 V switching regulator
18-40 V
—
—
3A
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
™