Page 1
DRAIN
SOURCE
COMMON
OVER-CURRENT
PROTECTION
V
Data Sheet
28102.1
STR-M6529
OFF-LINE SWITCHING REGULATOR
– WITH POWER MOSFET OUTPUT
The STR-M6529 is specifically designed to meet the requirement
for increased integration and reliability in off-line flyback converters
1
FAULT
OSC.
2
3
4
5
IN
+
LATCH
RS
FAULT
UVLO
operating in the quasi-resonant ringing choke mode. The device
incorporates the primary control and drive circuit with a discrete avalanche-rated high-voltage power MOSFET.
Crucial system parameters such as maximum ON time and OFF
time are fixed during manufacture. Local control circuit decoupling and
layout are optimized within the device.
FDBK
FAULT-LATCH
TRIGGER &
SOFT START
6
7
REF.
Dwg. PK-002
Cycle-by-cycle current limiting, soft start, under-voltage lock-out
with hysteresis, over-voltage protection, and thermal shutdown protect
the devices during all normal and overload conditions. Over-voltage
protection, thermal shutdown, or an external fault signal are latched.
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.
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VIN........................... 35 V
Proven in substantial volumes, this device and its fixed-frequency
counterparts represents a significant advance in off-line SMPS reliability
growth and integration.
Drain-Source Voltage, VDS.............. 800 V
Continuous Drain Current, ID............ 5.4 A
1 ms Single-Pulse Drain Current,
IDM................................................. 20 A
Single-Pulse Avalanche Energy,
EA.............................................. 400 mJ
Soft-Start/Fault-Latch Trig. Voltage,
V
............................................. 12 V
SS/FL
Feedback Input Current, I
........ 20 mA
FDBK
Over-Current Protection Voltage,
V
............................................. 3.5 V
OCP
Insulation Voltage,V
DISCONTINUED PRODUCT
WM(RMS)
........... 2000 V
FEATURES
■ Quasi-Resonant Ringing Choke Converter
■ Avalanche-Rated Power MOSFET Switch
■ Pulse-by-Pulse Current Limiting
■ Latched Over-Voltage and Thermal Protection
■ Maximum ON Time and OFF Time Set During Manufacture
Package Power Diss., PD........ See Graph
FET Junction Temperature, TJ...... +150°C
— FOR REFERENCE ONLY
Internal Frame Temperature, TF... +125°C
■ Internal Under-Voltage Lockout with Hysteresis
■ Over-Molded SIP with Integral Isolated Heat Spreader
Operating Temperature Range,
TA............................... -20°C to +125°C
Storage Temperature Range,
T
............................. -40°C to +125°C
stg
Always order by complete part number: STR-M6529 .
™
Page 2
STR-M6529
OFF-LINE
SWITCHING REGULATOR
FUNCTIONAL BLOCK DIAGRAM
V
IN
5
UVLO
REF.
OVER-VOLT.
PROTECT
R
FAULT
LATCH
SQ
1
2
DRAIN
SOURCE
TSD
TRIGGER
OSC.
R
0.01 µF
toff
OVER-CURRENT
+
0.75 V
1000 pF
4
PROTECTION
COMMON3
Dwg. FK-002-2
R
ton
6
FDBK
FAULT-LATCH
TRIGGER
& SOFT
START
3.3 kΩ
7
3.3 kΩ
ALLOWABLE PACKAGE POWER DISSIPATION MAXIMUM SAFE OPERATING AREA
60
54 W
40
MOUNTING SURFACE
TEMPERATURE
RECOMMENDED MAX.
FRAME TEMP. = +100°C
100
30
10
LIMITED
BY r
DS(on)
t = 1 ms SINGLE PULSE
w
t = 10 ms SINGLE PULSE
w
t = 0.1 ms SINGLE PULSE
w
20
FREE AIR
2.8 W
ALLOWABLE PACKAGE POWER DISSIPATION in WATTS
0
20 60 100
TEMPERATURE in °C
LIMITED BY FRAME
TEMP. = +125°C MAX.
140
Dwg. GK-003-1
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1994 Allegro MicroSystems, Inc.
3.0
1.0
DRAIN CURRENT in AMPERES
0.3
0.1
3.0
NO HEAT SINK
NATURAL COOLING
T = +25°C
A
10 30 100 300
DRAIN-TO-SOURCE VOLTAGE in VOLTS
DS
LIMITED BY V max
1000
Dwg. GK-004-1
™
Page 3
STR-M6529
OFF-LINE
SWITCHING REGULATOR
ALLOWABLE AVALANCHE ENERGY
600
500
SINGLE PULSE
400
300
200
100
ALLOWABLE AVALANCHE ENERGY in mJ
0
20 40 80 120 160
0 60 100
STARTING CHANNEL TEMPERATURE in °C
DRAIN CURRENT = 5 A
SUPPLY VOLTAGE = 50 V
140
Dwg. GK-009-1
ELECTRICAL CHARACTERISTICS
at TA = +25°C, VIN = 18 V, voltage measurements are referenced to
Common (pin 3) (unless otherwise noted).
Limits
Characteristic Symbol Test Conditions Min. Typ. Max. Units
On-State Voltage V
Under-Voltage Lockout V
Over-Voltage Threshold V
OVP(th)
FET Leakage Current I
FET ON Resistance r
DS(on)
Output Fall Time t
Maximum ON Time t
Minimum OFF Time t
Over-Current Threshold V
Feedback Threshold V
OCP(th)
FDBK(th)
Soft-Start Current I
Fault-Latch Threshold Volt. V
Fault-Latch Holding Current I
Fault-Latch Reset Voltage V
Insulation RMS Voltage V
WM(RMS)
INT
INQ
DSS
f
on
off
SS
FL(th)
INH
INQ
Turn-on, increasing V
Turn-off, decreasing V
IN
IN
14.4 – 17.6 V
9.0 – 11 V
26 – 31 V
VDS = 800 V – – 300 µA
VGS = 10 V, ID = 2.5 A – 1.8 2.2 Ω
VDD = 250 V, ID = 2.5 A, 10% to 90% V
DS
– – 250 ns
22.5 – 27.5 µs
2.0 – 4.0 µs
700 – 800 mV
– 750 – mV
VSS = 0 V -2.2 – -3.4 mA
8.0 – 9.2 V
VIN reduced to 8.5 V – 340 400 µA
IIN <20 µA, VIN reduced from 31 V 6.5 – 8.5 V
All terminals simultaneous reference 2000 – – V
metal plate against backside
Supply Current I
IN(ON)
I
IN(OFF)
Thermal Shutdown T
Thermal Resistance R
J
θJM
Operating 16 – 26 mA
Start up, VIN =14 V – – 100 µA
125 150 – °C
FET 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.
Page 4
STR-M6529
OFF-LINE
SWITCHING REGULATOR
WARNING: lethal potentials are present. See text.
5
5
R
SQ
AC INPUT
220 V/240 V
RECTIFIER
FULL-BRIDGE
+
TYPICAL APPLICATION
STR-M6529
1
2
+ OUTPUT
+
VOLTAGE
+
SENSE
7
★
+
6
4
+
3
APPLICATIONS INFORMATION
WARNING —
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.
These devices are designed to be operated at lethal voltages and energy levels.
– OUTPUT
Dwg. EK-002-1
The power MOSFET outputs of these devices are similar to the International Rectifier type IRFPE40. These devices
feature an excellent combination of fast switching, ruggedized device design, low on-resistance, and cost effectiveness.
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
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
™
Page 5
STR-M6529
OFF-LINE
SWITCHING REGULATOR
0.780
0.157
±0.008
Dimensions in Inches
(for reference only)
±0.008
T REF
M
0.130
ø
±0.008
0.216
±0.008
±0.012
0.906
0.033
+0.008
–0.004
±0.008
0.689
0.276
±0.02
1
7
0.100
±0.004
0.177
±0.028
Dwg. MK-003-7 in
NOTE: Exact body and lead configuration at vendor’s option within limits shown.
0.128
±0.004
0.216
0.026
+0.008
–0.004
Page 6
STR-M6529
OFF-LINE
SWITCHING REGULATOR
Dimensions in Millimeters
(controlling dimensions)
19.8
±0.2
T REF.
M
3.3
4.0
±0.2
±0.2
ø
5.5
±0.2
±0.3
23.0
0.85
+0.2
–0.1
±0.2
17.5
3.25
±0.1
7.0
±0.5
5.5
1
7
2.54
±0.1
NOTE: Exact body and lead configuration at vendor’s option within limits shown.
0.65
+0.2
–0.1
4.5
±0.7
Dwg. MK-003-7 mm
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 design of their products.
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
™
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