Description

The CS3865C is a high performance, fixed frequency, dual current mode controller. It is used in Off-Line and DC to DC converter applications and require a minimum number of external components. This integrated circuit features a unique oscillator for precise duty cycle limit and frequency control, a temperature compensated reference, two high gain error amplifiers, two current sensing comparators, and two high current totem pole outputs ideally suited for driving power MOSFETs. One of the outputs VOUT2 is switchable via the ENABLE 2 pin.

Features

■ Oscillator has Precise Duty Cycle Limit and Frequency Control

■ 500kHz Current Mode Operation

■ Automatic Feed Forward Compensation

■ Separate Latching PWMs for Cycle-By-Cycle Current Limiting

■ Internally Trimmed Reference with Undervoltage Lockout

■ Switchable Second Output

■ Two High Current Totem Pole Outputs

■ Input Undervoltage Lockout with Hysteresis

■ Low Start-Up and Operating Current