CD5034,LM5034 Dual Interleaved Current Mode Controller Chip

The CD5034 dual current mode PWMcontroller contains all the features needed tocontrol either two independent forward activeclamp DC/DC converters or a single highcurrent converter comprised of two interleavedpower stages. The two controller channelsoperate 180°out of phase thereby reducinginput ripple current.The CD5034 includes a startup regulator thatoperates over a wide input range up to100Vand compound (bipolar + CMOS) gate driversthat provide a robust 2.5A peak sink current.The adjustable dead-time of the active clampgate drivers and adjustable maximum PWMduty cycle reduce stress on the primary sideMOSFET switches. Additional features includeprogrammable line under-voltage lockout,cycle-by-cycle current limit, hiccup mode faultoperation with adjustable restart delay, PWMslope compensation, soft-start and oscillatorsynchronization capability.

Two Independent PWM Current Mode Controllers

Integrated High-Voltage Startup Regulator

Compound 2.5A Main Output Gate Drivers

Single Resistor Oscillator Setting to 2MHz

Synchronizable Oscillator

Active Clamp Gate Driver for P-Channel MOSFETs

Adjustable Gate Drive Overlap Time

Programmable Maximum Duty Cycle Maximum Duty Cycle Limiting 76% (TYP)

Adjustable Timer for Hiccup Mode Current Limiting

Integrated Slope Compensation

Adjustable Line Undervoltage Lockout

Independently Adjustable Soft-Start

Direct Interface with Opto-Coupler Transistor Thermal Shutdown

Packages: TSSOP20