0
ACTIVE
Rating |
Catalog |
Topology |
Boost, Flyback, Forward, SEPIC |
Vin (max) (V) |
40 |
Vin (min) (V) |
3.5 |
Vout (max) (V) |
60 |
Vout (min) (V) |
1.23 |
Switch current limit (typ) (A) |
3 |
Features |
Nonsynchronous rectification, UVLO fixed |
Operating temperature range (°C) |
-40 to 125 |
Iq (typ) (A) |
0.01 |
Duty cycle (max) (%) |
95 |
TO-220 (KC)-5-45.212 mm² 10.16 x 4.45
All trademarks are the property of their respective owners.
The LM1577/LM2577 are monolithic integrated circuits that provide all of the power and control functions for step-up (boost), flyback, and forward converter switching regulators. The device is available in three different output voltage versions: 12V, 15V, and adjustable.
Requiring a minimum number of external components, these regulators are cost effective, and simple to use. Listed in this data sheet are a family of standard inductors and flyback transformers designed to work with these switching regulators.
Included on the chip is a 3.0A NPN switch and its associated protection circuitry, consisting of current and thermal limiting, and undervoltage lockout. Other features include a 52 kHz fixed-frequency oscillator that requires no external components, a soft start mode to reduce in-rush current during start-up, and current mode control for improved rejection of input voltage and output load transients.
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