STR-G6651
Data Sheet
OFF-LINE QUASI-RESONANT
FLYBACK SWITCHING REGULATOR
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.
FDBK
OSC.
LATCH
UVLO
OVP
TSD
GROUND
OVERCURRENT
& FEEDBACK
SOURCE
SUPPLY
DRAIN
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 鈥?LF鈥? 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.
28102.9A
2
1
3
4
V
IN
OCP
Dwg. PK-011
ABSOLUTE MAXIMUM RATINGS
at T
A
= +25
掳
C
Control Supply Voltage, V
IN
. . . . . . .
35 V
Drain-Source Voltage, V
DS
. . . . . . . .
650 V
Drain Current, I
D
continuous . . . . . . . . . . . . . . . . . .
2.7 A
single-pulse, t
w
鈮?/div>
1 ms . . . . . . . .
7.2 A
Avalanche Energy, E
AS
single-pulse . . . . . . . . . . . . . . .
158 mJ
Over-Current Protection Voltage Range,
V
OCP
. . . . . . . . . . . . . . .
-0.3 V to +6 V
Insulation RMS Voltage,
V
WM(RMS)
. . . . . . . . . . . . . . . . . .
2000 V
Package Power Dissipation, P
D
control (V
IN
x I
IN(ON)
) . . . . . . . . .
0.8 W
total . . . . . . . . . . . . . . . . . . .
See Graph
FET Channel Temperature, T
J
. . .
+150
掳
C
Internal Frame Temperature, T
F
. .
+125
掳
C
Operating Temperature Range,
T
A
. . . . . . . . . . . . . . .
-20
掳
C to +125
掳
C
Storage Temperature Range,
T
S
. . . . . . . . . . . . . . .
-40
掳
C to +125
掳
C
5
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
.
鈩?/div>
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