STRS6709 Datasheet, PDF (1/8 Pages) Allegro MicroSystems – OFF-LINE SWITCHING REGULATORS - WITH BIPOLAR SWITCHING TRANSISTOR

STR-S6707 THRU
STR-S6709
OFF-LINE SWITCHING REGULATORS
– WITH BIPOLAR SWITCHING TRANSISTOR
The STR-S6707, STR-S6708, and STR-S6709 are specifically
designed to meet the requirement for increased integration and reliabil-
COLLECTOR 1
ity in off-line quasi-resonant flyback converters. These devices incorpo-
rate the primary control and proportional drive circuit with a third-
COMMON 2
BASE 3
T SINK 4
DRIVE 5
C _OVER-CURRENT
PROTECTION
6
U _{FDBK 7}
D Y _{INHIBIT 8}
O ^{L VIN 9}
DRIVE
OSC.
FAULT
S
FAULT
LATCH
R
REF.
UVLO
R ^N _Dwg.PK-001
P _E ^O _{ABSOLUTE MAXIMUM RATINGS}
D _{Supply Voltage, VIN ........................... 15 V}
E ^C Output Voltage, V_CEX ....................... 850 V
N _{VEBO ................................................ 7 V}
U E Continuous Output Current,
I_C .......................................... See Table
IN ^R 1 ms Single-Pulse Output Current,
T ^{E ICM ........................................ See Table}
F ^{Sink Current, I}S^{......................... See Table}
N Drive Current, I_D .......................... -700 mA
E _{Feedback Current, IFDBK ................. 20 mA}
O R _{Inhibit Voltage, VINH ........................... 15 V}
C ^{Over-Current Protection Voltage Range,}
R _{VOCP ............................................ ±3.5 V}
IS ^{O Insulation Voltage,V}WM(RMS) ^{........... 2000 V}
D ^{F Package Power Diss., PD ........ See Graph}
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.
FEATURES
s Quasi-Resonant Operation for Low EMI and High Efficiency
s Output Power to 220 W
s Low-Power Output Standby Mode
s Pulse-by-Pulse Over-Current Protection
s Latched Over-Voltage and Thermal Protection
s Third-Generation Switching Transistor with Proportional Drive
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
— ^{Output Junction Temperature, TJ .. +150°C}
Internal Frame Temperature, T_F ... +125°C
Always order by complete part number:
Max. Cont.
Peak
Max. Sink
Operating Temperature Range,
Part Number Current, I_C
Current, I_CM Current, I_S
T_A ............................... -20°C to +125°C
STR-S6707
6A
12 A
1.5 A
Storage Temperature Range,
STR-S6708
7.5 A
15 A
1.5 A
T_stg ............................. -40°C to +125°C
STR-S6709
10 A
20 A
2A
™