Negative Output Flyback Pulse Width Modulator

The UC3572 is a negative output flyback pulse width Modulator which con- verts a positive input voltage to a regulated negative output voltage. The chip is optimized for use in a single inductor negative flyback switching converter employing an external PMOS Switch The block diagram consists of a precision reference, an error Amplifier configured for voltage mode op- eration, an Oscillator a PWM Comparator with latching Logic and a 0.5A peak Gate driver. The UC3572 includes an undervoltage lockout circuit to insure sufficient input supply voltage is present before any switching activ- ity CAN occur, and a pulse-by-pulse current limit. Output current CAN be sensed and limited to a user determined maximum value. The UVLO circuit turns the chip off when the input voltage is below the UVLO threshold. In addition, a sleep Comparator Interfaces to the UVLO circuit to turn the chip off. This reduces the supply current to only 50A, making the UC3572 ideal for battery powered applications. By Texas Instruments
UC1572 's PackagesUC1572 's pdf datasheet
UC3572




UC1572 Pinout, Pinouts
UC1572 pinout,Pin out
This is one package pinout of UC1572,If you need more pinouts please download UC1572's pdf datasheet.

UC1572 Application circuits
UC1572 circuits
This is one application circuit of UC1572,If you need more circuits,please download UC1572's pdf datasheet.


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