1 Features
1• Two Independent PWM Current Mode Controllers
• Integrated High-Voltage Startup Regulator
• Compound 2.5-A Main Output Gate Drivers
• Single Resistor Oscillator Setting to 2 MHz
• Synchronizable Oscillator
• Programmable Maximum Duty Cycle
• Maximum Duty Cycle Fold-Back at High-Line
Voltage
• Adjustable Timer for Hiccup Mode Current
Limiting
• Integrated Slope Compensation
• Adjustable Line Undervoltage Lockout
• Independently Adjustable Soft-Start (Each
Regulator)
• Direct Interface with Opto-Coupler Transistor
• Thermal Shutdown
• TSSOP 16-Pin Package

2 Applications
• Telecommunication Power Converters
• Industrial Power Converters
• 42-V Automotive Systems

3 Description
The LM5032 dual current mode PWM controller
contains all the features needed to control either two independent forward dc/dc converters or a single high
current converter comprised of two interleaved power
stages. The two controller channels operate 180° out
of phase thereby reducing input ripple current. The LM5032 includes a startup regulator that operates
over a wide input range up to 100 V and compound
(bipolar + CMOS) gate drivers that provide a robust
2.5-A peak sink current. The adjustable maximum
PWM duty cycle reduce stress on the primary side
MOSFET switches. Additional features include programmable line undervoltage lockout, cycle-by-
cycle current limit, hiccup mode fault operation with
adjustable response time, PWM slope compensation,
soft-start, and a 2-MHz capable oscillator with
synchronization capability.