Datasheet Texas Instruments LM5027ASQ/NOPB

LM5027A
www.ti.com SNVS642B – APRIL 2010 – REVISED MARCH 2013 Voltage Mode Active Clamp Controller
Check for Samples: LM5027A FEATURES DESCRIPTION The LM5027A is a functional variant of the LM5027
active clamp PWM controller. The functional
difference of the LM5027A is that the maximum duty
cycle of the LM5027A is decreased from 91% to 71%.
In addition, the oscillator timing equation has been
modified. 1 2 Voltage-Mode Control
Line Feed-Forward PWM Ramp
Internal 105V Rated Start-Up Bias Regulator
Programmable Line Under-Voltage Lockout
(UVLO) with Adjustable Hysteresis
Versatile Dual Mode Over-Current Protection
Programmable Volt-Second Limiter and SoftStart
Programmable Synchronous Rectifier SoftStart and Stop
Precise 500mV Over-Current Comparator
Current Sense Leading Edge Blanking
Programmable Oscillator With 1 MHz
Maximum Frequency and Synchronization
Capability
Precision 5V Reference
Programmable Time Delays Between Outputs
A 70% Maximum Duty Cycle The LM5027A pulse-width modulation (PWM) …