Average Current Mode PWM Controller IC

The UC3886 family of PWM Controller ICs is designed for DC-to-DC con- verters with average current mode control. It is designed for use in con- junction with the UC3910 4-bit DAC and Voltage Monitor. The UC3886 drives an external N-Channel MOSFET and CAN be used to power the In- tel Pentium Pro and other high-end Microprocessors The UC3886 in conjunction with the UC3910 converts 5VDC to an adjust- able output ranging from 2.0V to 3.5V in 100mV steps with 35mV DC sys- tem accuracy. The Oscillator is programmed by the users selection of an external resis- tor and capacitor, and is designed for 300kHz typical operation. The voltage and current Amplifiers have 3.5MHz gain-bandwidth product to satisfy high performance system requirements. The internal Current Sense Amplifier permits the use of a low value current sense resistor, minimizing power loss. It has inputs and outputs accessi- ble to allow user-selection of gain-setting resistors, and is internally com- pensated for a gain of 5 and above. The command voltage input is buffered and provided for use as the reference for the Current Sense am- plifier. The output of the voltage Amplifier (input to the current amplifier) is clamped to 1 volt above the command voltage to serve as a current limit. The Gate output CAN be disabled by bringing the CAO/ENBL pin to below 0.8 volts. By Texas Instruments
UC1886 's PackagesUC1886 's pdf datasheet



UC1886 Pinout, Pinouts
UC1886 pinout,Pin out
This is one package pinout of UC1886,If you need more pinouts please download UC1886's pdf datasheet.

UC1886 Application circuits
UC1886 circuits
This is one application circuit of UC1886,If you need more circuits,please download UC1886's pdf datasheet.


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