APW8820 Datasheet | ANPEC

System Power PWM Controller for Notebook puters Features - - - - - - - - - - - - - - - Built in 2 PWM Controller into single chip High Input Battery Voltage Range from 5.5V to 28V Fixed 1.0MHz Switching Frequency for Individual Channel Built in Programmable Inductor DCR Sense For Inductor Current Sense Function Built in Current Mode Control with fully Support MLCC Output Capacitor Built in 180 degrees Phase Shift Function Built in PWM/PSM/Ultra Sonic PFM (25k Hz) Control Schemes Built in Internal 5V/175m A and 3.3V/50m A Linear Regulators 0.5V Reference Voltage Built in Digital Soft-start Latch Off Mode for Both Channels Over-Temperature Protection Built in SYSPOK Report function for 2 PWM Channels Available in TQFN4x4-24 and QFN3x3-20 Package Halogen and Lead Free Available (Ro HS pliant) General Description The APW8820 offers a pact power supply solution to provide 2 voltages required by notebook application. The 2 PWM controllers use current-mode scheme with phase shift 180 degrees control scheme allow to use MLCC output capacitors. The higher fixed 1MHz switching frequency allows to use thin and small filtered ponents. The APW8820 provides good transient response and accurate DC output voltage in either PSM or PWM Mode. In Pulse Skipping Modulation Mode (PSM), the APW8820 provides high efficiency over light to heavy loads with loading modulated switching frequencies. The unique ultrasonic mode maintains the switching frequency above 25k Hz, which eliminates noise in audio applications. The APW8820 built in individual enable control input on 2 channels for flexible power sequence adjustment. The powergood outputs (SYSPOK) indicate the operating mode of the PWMx. The APW8820 has been equipped with excellent protection functions: Power-on-RESET (POR), over-current protection (OCP), over-voltage protection OVP, under-voltage protection (UVP) and over-temperature protection (OTP) to prevent the device operate under abnormal condition or adjacent...