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Allegro MicroSystems
Allegro MicroSystems

STR-G6632 Datasheet

(STRG66xx) OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATOR


STR-G6632 Datasheet Preview


STR-G6651
OFF-LINE QUASI-RESONANT
FLYBACK SWITCHING REGULATOR
OSC.
FDBK
LATCH
www.DataSheet4U.com
UVLO
OVP
TSD
Dwg. PK-011
ABSOLUTE MAXIMUM RATINGS
at TA = +25°C
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 . . . +150°C
Internal Frame Temperature, TF . . +125°C
Operating Temperature Range,
TA . . . . . . . . . . . . . . . -20°C to +125°C
Storage Temperature Range,
TS . . . . . . . . . . . . . . . -40°C to +125°C
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.
Cycle-by-cycle current limiting, under-voltage lockout with hyster-
esis, 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.
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 .
Page 1

STR-G6651
OFF-LINE
QUASI-RESONANT FLYBACK
SWITCHING REGULATOR
V IN
4
UVLO
REF.
FUNCTIONAL BLOCK DIAGRAM
OVER-VOLT.
PROTECT
DRIVE
REG.
R
FAULT
LATCH
SQ
www.DataSheet4U.com TSD
OSC
1 DRAIN
2 SOURCE
+ 1.45 V
+ 0.73 V
FEEDBACK &
5 OVER-CURRENT
PROTECTION
3 GROUND
ALLOWABLE PACKAGE POWER DISSIPATION
Dwg. FK-002-5
MAXIMUM SAFE OPERATING AREA
30
27 W
MOUNTING SURFACE
TEMPERATURE
20
LIMITED BY FRAME
TEMP. = +125°C MAX.
10
1.5 W
0.8 W
0
20
FREE AIR
CONTROLLER
60 100
TEMPERATURE in °C
140
Dwg. GK-003-4
50
15
LIMITED
r5 BY DS(on)
1.5
tw
=
1
ms
tw = 0.1 ms SINGLE
SINGLE PULSE
PULSE
0.5
NO HEAT SINK
NATURAL COOLING
TA = +25°C
0.15
0.05
3.0
10 30 100 300 1000
DRAIN-SOURCE VOLTAGE in VOLTS
Dwg. GK-004-5
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1999, 2000 Allegro MicroSystems, Inc.
Page 2

STR-G6651
OFF-LINE
QUASI-RESONANT FLYBACK
SWITCHING REGULATOR
ELECTRICAL CHARACTERISTICS at TA = +25°C, VIN = 18 V, VDD = 10 V, VS = 0, voltage mea-
surements are referenced to ground terminal (unless otherwise specified).
Limits
Characteristic
Symbol Test Conditions
Min. Typ. Max. Units
On-State Voltage
Under-Voltage Lockout
Over-Voltage Threshold
www.DataSheet4U.com
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
VINT
VINQ
VOVP(th)
V(BR)DSS
IDSS
rDS(on)
toff
tw(th)
toff
VFDBK
Turn-on, increasing VIN
Turn-off, decreasing VIN
Turn-off, increasing VIN
ID = 300 µA
VDS = 650 V
VS = 10 V, ID = 0.9 A, TJ = +25°C
Drain waveform high
14.4
9.0
20.5
650
45
16
10
22.5
17.6
11
24.5
300
3.95
55
V
V
V
V
µA
µs
Drain waveform high1
Drain waveform high1
Drain waveform low to high1
Oscillation synchronized2
– – 1.0
– – 1.5
0.68 0.73 0.78
1.3 1.45 1.6
µs
µs
V
V
Over-Current Protection/Feedback
Sink Current
Latch Holding Current
Latch Release Voltage
Switching Time
Supply Current
Insulation RMS Voltage
IOCP/FB
IIN(OVP)
VIN
tf
IIN(ON)
IIN(OFF)
VWM(RMS)
VOCP/FB = 1.0 V
1.2 1.35 1.5 mA
VIN reduced from 24.5 V to 8.5 V
– 400 mA
IIN 20 µA, VIN reduced from 24.5 V 6.6 – 8.4 V
VDD = 200 V, ID = 0.9 A
– – 250 ns
Operating3
– – 30 mA
Increasing VIN prior to oscillation
All terminals simultaneous refer-
ence metal plate against backside
2000
100 µA
–V
Thermal Shutdown
Thermal Resistance
TJ
RθJM
140 –
°C
Output junction-to-mounting frame –
– 1.63 °C/W
Notes: Typical Data is for design information only.
1. Feedback is square wave, VIM = 2.2 V, th = 1 µs, tl = 35 µs
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 µs, tl = 1 µs
www.allegromicro.com
Page 3

STR-G6651
OFF-LINE
QUASI-RESONANT FLYBACK
SWITCHING REGULATOR
ALLOWABLE AVALANCHE ENERGY
200
150
100
www5.D0 ataSheet4U.com
SINGLE PULSE
DRAIN CURRENT = 1.8 A
0
0 20 40 60 80 100 120 140 160
STARTING CHANNEL TEMPERATURE in °C
Dwg. GK-009-2
Part Number
STR-G6622
STR-G6624
STR-G6632
STR-G6651
STR-G6652
STR-G6653
STR-G6600 Series
Drain-Source
Output Breakdown Voltage
at ID = 300 µA
V(BR)DS, Minimum
Drain-Source
ON Resistance
at ID = 0.9 A
r ,DS(on) Maximum
For 100/120 V AC Input
450 V
2.18
450 V
0.92
For 110/120 V AC Input
500 V
2.62
For 200/220 V AC Input
650 V
3.95
650 V
2.80
650 V
1.95
Output Power
44 W – 60 W
98 W – 130 W
36 W – 50 W
66 W
86 W
120 W
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Page 4
Part Number STR-G6632
Manufactur Allegro MicroSystems
Description (STRG66xx) OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATOR
Total Page 8 Pages
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