Negative Output Flyback Pulse Width Modulator

The UC3572 is a negative output flyback pulse width Modulator which converts 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 operation, 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 activity 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 50uA, making the UC3572 ideal for battery powered applications.
By Texas Instruments
Part Manufacturer Description Datasheet Samples
UC2572NG4 Texas Instruments 0.7A SWITCHING CONTROLLER, 115kHz SWITCHING FREQ-MAX, PDIP8, GREEN, PLASTIC, DIP-8
UC2572DTRG4 Texas Instruments Negative Output Flyback Pulse Width Modulator 8-SOIC -40 to 85
UC2572N Texas Instruments Negative Output Flyback Pulse Width Modulator 8-PDIP -40 to 85
UC2572D Texas Instruments Negative output Flyback pulse width modulator 8-SOIC -40 to 85
UC2572DG4 Texas Instruments Negative output Flyback pulse width modulator 8-SOIC -40 to 85
UC2572DTR Texas Instruments Negative output Flyback pulse width modulator 8-SOIC -40 to 85
UC2572 's PackagesUC2572 's pdf datasheet
UC2572D SOIC
UC2572DG4 SOIC
UC2572DTR SOIC
UC2572DTRG4 SOIC
UC2572N PDIP
UC2572NG4 PDIP




UC2572 Pinout, Pinouts
UC2572 pinout,Pin out
This is one package pinout of UC2572,If you need more pinouts please download UC2572's pdf datasheet.

UC2572 Application circuits
UC2572 circuits
This is one application circuit of UC2572,If you need more circuits,please download UC2572's pdf datasheet.


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