STR-S6401
STR-S6401 is OFF-LINE SWITCHING REGULATORS WITH POWER MOSFET OUTPUT manufactured by Allegro MicroSystems.
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STR-S6401 AND STR-S6401F
OFF-LINE SWITCHING REGULATORS
- WITH POWER MOSFET OUTPUT
DRAIN 1
LATCH OSC.
Data Sheet 28101
SOURCE
GATE POWER GROUND SOFT START OVER-CURRENT PROTECTION
V IN
PWM +
+
These devices are specifically designed to meet the requirements for increased integration and reliability in off-line flyback (STR-S6401) and forward (STR-S6401F) converters operating in a fixed-frequency PWM mode. Each device incorporates the primary control and drive circuits with an avalanche-rated power MOSFET. Crucial system parameters such as switching frequency and maximum duty cycle are fixed during manufacture. The STR-S6401 and STR-S6401F differ only in their maximum duty cycle. Control circuit decoupling and layout are optimized within each device. Cycle-by-cycle and average-current limiting, soft start, undervoltage lockout with hysteresis, and thermal shutdown protect the device during all normal and overload conditions. The performance and reliability of these devices, and their variable-frequency counterparts, has been proven in substantial volume production. The requirements of high dielectric isolation and low transient thermal impedance and steady-state thermal resistance are satisfied in an over-molded, 9-pin single in-line power package. Similar off-line switching regulators, with output ratings to 800 V at 5 A, are also available.
UVLO
REF.
SIGNAL GROUND FDBK
Dwg....
