The APW8820 offers a compact 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

Features91b嘉泰姆

Built in 2 PWM Controller into single chip91b嘉泰姆

High Input Battery Voltage Range from 5.5V to 28V91b嘉泰姆

Fixed 1.0MHz Switching Frequency for Individual91b嘉泰姆

Channel91b嘉泰姆

Built in Programmable Inductor DCR Sense For91b嘉泰姆

Inductor Current Sense Function91b嘉泰姆

Built in Current Mode Control with fully Support91b嘉泰姆

MLCC Output Capacitor91b嘉泰姆

Built in 180 degrees Phase Shift Function91b嘉泰姆

Built in PWM/PSM/Ultra Sonic PFM (25kHz) Control91b嘉泰姆

Schemes91b嘉泰姆

Built in Internal 5V/175mA and 3.3V/50mA Linear91b嘉泰姆

Regulators91b嘉泰姆

0.5V Reference Voltage91b嘉泰姆

Built in Digital Soft-start91b嘉泰姆

Latch Off Mode for Both Channels91b嘉泰姆

Over-Temperature Protection91b嘉泰姆

Built in SYSPOK Report function for 2 PWM91b嘉泰姆

Channels91b嘉泰姆

Available in TQFN4x4-24 and QFN3x3-20 Package91b嘉泰姆

Halogen and Lead Free Available (RoHS Compliant)91b嘉泰姆

General Description 91b嘉泰姆

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The APW8820 offers a compact power supply solution to91b嘉泰姆

provide 2 voltages required by notebook application. The91b嘉泰姆

2 PWM controllers use current-mode scheme with phase91b嘉泰姆

shift 180 degrees control scheme allow to use MLCC91b嘉泰姆

output capacitors. The higher fixed 1MHz switching fre-91b嘉泰姆

quency allows to use thin and small filtered components.91b嘉泰姆

The APW8820 provides good transient response and91b嘉泰姆

accurate DC output voltage in either PSM or PWM Mode.91b嘉泰姆

In Pulse Skipping Modulation Mode (PSM), the APW882091b嘉泰姆

provides high efficiency over light to heavy loads with load-91b嘉泰姆

ing modulated switching frequencies. The unique ultra-91b嘉泰姆

sonic mode maintains the switching frequency above91b嘉泰姆

25kHz, which eliminates noise in audio applications. The91b嘉泰姆

APW8820 built in individual enable control input on 2 chan-91b嘉泰姆

nels for flexible power sequence adjustment. The power-91b嘉泰姆

good outputs (SYSPOK) indicate the operating mode of91b嘉泰姆

the PWMx.91b嘉泰姆

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The APW8820 has been equipped with excellent protec-91b嘉泰姆

tion functions: Power-on-RESET (POR), over-current pro-91b嘉泰姆

tection (OCP), over-voltage protection OVP, under-volt-91b嘉泰姆

age protection (UVP) and over-temperature protection91b嘉泰姆

(OTP) to prevent the device operate under abnormal con-91b嘉泰姆

dition or adjacent pin shortage.91b嘉泰姆

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