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Allegro MicroSystems
Allegro MicroSystems

STR-G6622 Datasheet Preview

STR-G6622 Datasheet

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

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STR-G6622 pdf
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 .



Allegro MicroSystems
Allegro MicroSystems

STR-G6622 Datasheet Preview

STR-G6622 Datasheet

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

No Preview Available !

STR-G6622 pdf
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.


Part Number STR-G6622
Description (STRG66xx) OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATOR
Maker Allegro MicroSystems
Total Page 8 Pages
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