Current Mode PWM Controller 2.5A 20-Pin TSSOP Rail

The LM5034 dual current mode PWM controller contains all the features needed to control either two independent forward/active clamp 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 LM5034 includes a startup regulator that operates over a wide input range up to 100V and compound (bipolar + CMOS) gate drivers that provide a robust 2.5A peak sink current. The adjustable dead-time of the active clamp gate drivers and adjustable maximum PWM duty cycle reduce stress on the primary side MOSFET switches. Additional features include programmable line under-voltage lockout, cycle-by-cycle current limit, hiccup mode fault operation with adjustable restart delay, PWM slope compensation, soft-start, and a 2 MHz capable oscillator with synchronization capability. 

Two Independent PWM Current Mode Controllers

Integrated High Voltage Startup Regulator

Compound 2.5A Main Output Gate Drivers

Single Resistor Oscillator Setting to 2 MHz

Synchronizable Oscillator

Active Clamp Gate Driver for P-Channel MOSFETs

Adjustable Gate Drive Overlap Time

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 Under-Voltage Lockout

Independently Adjustable Soft-Start (Each Regulator)

Direct Interface with Opto-Coupler Transistor

Thermal Shutdown