AP2004

PWM Buck Controller „ Features - PWM Buck Control Circuitry - Operating voltage can be up to 27V - Under voltage Lockout (UVLO) Protection - Short Circuit Protection (SCP) - Soft-start circuit - Variable Oscillator Frequency -- 300Khz Max - 1.25V voltage reference Output - 8-pin PDIP and SOP packages „ Applications - Backlight inverter - LCD Monitor - XDROM, XDSL Product - DC/DC converters in computers, etc. „ Pin Assignment ( Top View ) OUT VCC COMP FB 1 2 3 4 8 GND 7 CT 6 SS 5 SCP PDIP/SOP „ Ordering Information AP2004 „ General Description The AP2004 integrates Pulse-Width-Modulation (PWM) control circuit into a single chip, mainly designs for power-supply regulator. All the functions include an on-chip 1.25V reference output, an error amplifier, an adjustable oscillator, a soft-start, UVLO, SCP circuitry, and a push-pull output circuit. Switching frequency is adjustable by trimming CT. During low VCC situation, the UVLO makes sure that the outputs are off until the internal circuit operates normally. „ Pin Descriptions Name CT FB SS COMP OUT GND VCC SCP Description Timing Capacitor Voltage Feedback Soft-Start. Feedback Loop Compensation PWM Output Ground Supply Voltage Short Circuit Protection AP2004 X X X Package Lead Free Packing N: PDIP-8L Blank : Normal Blank : Tube S: SOP-8L L : Lead Free Package A : Taping This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liabi...