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LM5025B
www.ti.com SNVS354B – JULY 2005 – REVISED MARCH 2013 LM5025B Active Clamp Voltage Mode PWM Controller
Check for Samples: LM5025B FEATURES DESCRIPTION The LM5025B is a functional variant of the LM5025
active clamp PWM controller. The functional
differences of the LM5025B are as follows: The maximum PWM duty cycle is limited to less
than 75% to reduce voltage stress on the power
MOSFETs. The CS2 hiccup mode threshold is increased to
0.5V The CS2 filter discharge device is disabled The VCC regulator continues to operate when the
line UVLO is below the threshold of normal
operation The VREF regulator is switched off when the line
UVLO input falls below the operating threshold The internal 5kΩ COMP pin pull-up resistor is
removed 1 2 Internal Start-Up Bias Regulator
3A Compound Main Gate Driver
Programmable Line Under-Voltage Lockout
(UVLO) with Adjustable Hysteresis
Voltage Mode Control with Feed-Forward
Adjustable Dual Mode Over-Current Protection
Programmable Overlap or Deadtime between
the Main and Active Clamp Outputs
Volt x Second Maximum Duty Cycle Clamp
Programmable Soft-Start
Current Sense Leading Edge Blanking
Single Resistor Programmable Oscillator …
