MC34025PG Datasheet PDF - ON Semiconductor

●The MC34025 series are high speed, fixed frequency, double−ended pulse width modulator controllers optimized for high frequency operation. They are specificallydesigned for Off−Line and DC−to−DC converter applications offering the designer a cost effective solution with minimal external components. These integrated circuits feature an oscillator, a temperature compensated reference, a wide bandwidth error amplifier, a high speed current sensing comparator, steering flip−flop, and dual high current totem pole outputs ideally suited for driving power MOSFETs. Also included are protective features consisting of input and reference undervoltage lockouts each with hysteresis, cycle−by−cycle current limiting, and a latch for single pulse metering. The flexibility of this series allows it to be easily configured for either current mode or voltage mode control.

●Features

●•50 ns Propagation Delay to Outputs

●•Dual High Current Totem Pole Outputs

●•Wide Bandwidth Error Amplifier

●•Fully−Latched Logic with Double Pulse Suppression

●•Latching PWM for Cycle−By−Cycle Current Limiting

●•Soft−Start Control with Latched Overcurrent Reset

●•Input Undervoltage Lockout with Hysteresis

●•Low Startup Current (500 A Typ)

●•Internally Trimmed Reference with Undervoltage Lockout

●•45% Maximum Duty Cycle (Externally Adjustable)

●•Precision Trimmed Oscillator

●•Voltage or Current Mode Operation to 1.0 MHz

●•Functionally Similar to the UC3825

●•Pb−Free Packages are Available