High Performance Dual Channel Current Mode Controllers

The MC34065−H,L series are high performance, fixed frequency, dual current mode controllers. They are specifically designed for off−line and dc−to−dc converter applications offering the designer a cost effective solution with minimal external components. These integrated circuits feature a unique oscillator for precise duty cycle limit and frequency control, a temperature compensated reference, two high gain error amplifiers, two current sensing comparators, Drive Output 2 Enable pin, and two high current totem pole outputs ideally suited for driving power MOSFETs.

• Unique Oscillator for Precise Duty Cycle Limit and Frequency Control

• Current Mode Operation to 500 kHz

• Automatic Feed Forward Compensation

• Separate Latching PWMs for Cycle−By−Cycle Current Limiting

• Internally Trimmed Reference with Undervoltage Lockout

• Drive Output 2 Enable Pin

• Two High Current Totem Pole Outputs

• Input Undervoltage Lockout with Hysteresis

• Low Startup and Operating Current