STR-S6703
AND
STR-S6704
OFF-LINE SWITCHING REGULATORS
鈥?WITH BIPOLAR SWITCHING TRANSISTOR
COLLECTOR
1
COMMON
2
FAULT
The STR-S6703 and STR-S6704 are specifically designed to meet
the requirement for increased integration and reliability in off-line quasi-
resonant flyback converters. These devices incorporate the primary
control and proportional drive circuit with a third-generation high-voltage
bipolar switching transistor.
Crucial system parameters such as maximum ON time and OFF
time are fixed during manufacture. Local control circuit decoupling and
layout are optimized within each device.
Cycle-by-cycle current limiting, under-voltage lock-out with hyster-
esis, over-voltage protection, and thermal shutdown protect these
devices during all normal and overload conditions. Over-voltage
protection and thermal shutdown are latched after a short delay. A
versatile triple-level inhibit circuit includes the OFF time synchronization
required to establish quasi-resonant operation. The inhibit function has
also been expanded to initiate operation in stand-by mode in which the
power supply delivers a small fraction of the steady-state output power.
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.
Proven in substantial volumes, these devices and their fixed-
frequency counterparts represent a significant advance in off-line SMPS
reliability growth and integration. Similar devices, with an output
voltage rating of 850 V and output power ratings to 220 W, are available
as the STR-S6707 thru STR-S6709.
Data Sheet
28113.1*
BASE
3
S
DRIVE
FAULT
LATCH
SINK
4
OSC.
R
DRIVE
OVER-CURRENT
PROTECTION
FDBK
5
6
+
REF.
7
INHIBIT
8
V IN
9
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, V
IN
...........................
15 V
Output Voltage, V
CEX
.......................
500 V
V
EBO
................................................
7 V
Continuous Output Current,
I
C
..........................................
See Table
1 ms Single-Pulse Output Current,
I
CM
........................................
See Table
Sink Current, I
S
.................................
1.5 A
Drive Current, I
D
..........................
-700 mA
Feedback Current, I
FDBK
.................
20 mA
Inhibit Voltage, V
INH
...........................
15 V
Over-Current Protection Voltage Range,
V
OCP
............................................
鹵
3.5 V
Insulation Voltage,V
WM(RMS)
...........
2000 V
Package Power Diss., P
D
........
See Graph
Output Junction Temperature, T
J
..
+150
擄
C
Internal Frame Temperature, T
F
...
+125
擄
C
Operating Temperature Range,
T
A
...............................
-20
擄
C to +125
擄
C
Storage Temperature Range,
T
stg
.............................
-40
擄
C to +125
擄
C
+
UVLO
Dwg. PK-001
FEATURES
I
I
I
I
I
I
I
I
Quasi-Resonant Operation for Low EMI and High Efficiency
Output Power to 140 W
Low-Power Output Standby Mode
Pulse-by-Pulse Over-Current Protection
Latched Over-Voltage and Thermal Protection
Third-Generation Switching Transistor with Proportional Drive
Maximum ON Time and OFF Time Set During Manufacture
Internal Under-Voltage Lockout with Hysteresis
I
Over-Molded SIP with Integral Isolated Heat Spreader
Always order by complete part number:
Max. Cont.
Peak
Part Number
Current, I
C
Current, I
CM
STR-S6703
STR-S6704
6A
5A
12 A
10 A
鈩?/div>
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