STR-S6525
OFF-LINE SWITCHING REGULATOR
– WITH POWER MOSFET OUTPUT
DRAIN
1
OSC.
FAULT
LATCH
Data Sheet
28102.11
SOURCE
2
R
COMMON
3
S
The STR-S6525 is specifically designed to meet the requirement
for increased integration and reliability in off-line flyback converters
operating in a constant OFF-time 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.
Cycle-by-cycle current limiting, soft start, under-voltage lock-out
with hysteresis, over-voltage protection, and thermal shutdown protect
the device during all normal and overload conditions. Over-voltage
protection, thermal shutdown, or an external fault signal be latched.
The dual requirements of dielectric isolation and low transient thermal
impedance and steady-state thermal resistance are satisfied in an over-
molded single-in-line power package.
SYNC
4
FAULT
V IN
5
UVLO
FDBK
6
REF.
SOFT START
FAULT-LATCH
TRIGGER
OVER-CURRENT
PROTECTION
7
8
+
9
Dwg. PK-002-1
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, V
IN
...........................
35 V
Continuous Drain Current, I
D
............
6.0 A
Drain-Source Voltage, V
DS
..............
600 V
1 ms Single-Pulse Drain Current,
I
DM
.................................................
24 A
Single-Pulse Avalanche Energy,
E
A
..............................................
400 mJ
Fault-Latch Trig. Input Current, I
FL
1.0 mA
dc
≤
25%, I
FLM
...........................
-50 mA
Feedback Input Current, I
FDBK
........
20 mA
Soft-Start Output Current, I
SS
.......
-3.0 mA
Over-Current Protection Voltage,
V
OCP
.............................................
3.5 V
Insulation Voltage,V
WM(RMS)
...........
2000 V
Package Power Diss., P
D
........
See Graph
FET Junction Temperature, T
J
......
+150
°
C
Internal Frame Temperature, T
F
...
+125
°
C
Operating Temperature Range,
T
A
...............................
-20
°
C to +125
°
C
Storage Temperature Range,
T
stg
.............................
-30
°
C to +125
°
C
D
S
I
O
C
T
N
D
E
N
U
E
N
ER
I
FEATURES
Proven in substantial volumes, this device and its fixed-frequency
counterparts represents a significant advance in off-line SMPS reliability
growth and integration.
R
P
U
Y
D
L
O
N
O
T
C
E
C
s
Constant OFF-Time Converter Operating Mode
s
Avalanche-Rated Power MOSFET Switch
s
Pulse-by-Pulse Current Limiting
s
Latched Over-Voltage and Thermal Protection
s
Maximum ON Time and OFF Time Set During Manufacture
s
Internal Under-Voltage Lockout with Hysteresis
s
Over-Molded SIP with Integral Isolated Heat Spreader
s
External Synchronization Capability
—
F
R
O
R
F
E
Always order by complete part number:
STR-S6525
.
™
ALLEGRO [ ALLEGRO MICROSYSTEMS ]
