ACE4108

Max.2A Li-ion Switching Charger IC

VER 1.1

3

Packaging Type

DFN3*3-12

PIN#

Name

Description

1

CHRIN

Power Path Output Voltage.

2

BAT

Battery Charger Output Terminal. Connect a 10μF ceramic chip capacitor between BAT

and GND to keep the ripple voltage small.

3

EN

Enable Input Pin. Pulling the EN pin low places the ACE4108 into a low power state where

the BAT drain current drops to less than 3μA and the supply current is reduced to less

than 50μA. For normal operation, pull the pin high.

4、10

GND

Ground.

5

VIN

Positive Supply Voltage Input. This pin connects to the power devices inside the chip. VIN

ranges from 5V to 16V for normal operation. Operation down to the under-voltage lockout

threshold is allowed wi

th current limited wall adapters. Decouple with a 22μF or larger

surface mounted ceramic capacitor.

6

FB

Battery Feedback Voltage.

7

BST

Boostrap. A capacitor connected between SW and BST pins is required to form a floating

supply across the high-side switch driver.

8

SW

Switch Node Connection. This pin connects to the drains of the internal main and

synchronous power MOSFET switches. Connect to external inductor.

9

CHRG

Open-Drain Charge Status Output. When the battery is charging, the CHRG pin is pulled

low by an internal N-channel MOSFET. When the charge cycle is completed, When the

ACE4108 detects an under voltage lockout condition, CHRG is forced high impedance.

11

Ctrl

Sense Feedback Voltage Pin.

12

ISET

Charge Current Program, Monitor the charge current and Shutdown. This pin set to 1V in

constant-current mode. The charge current is programmed by connecting a 1% resistor,

RISET, to GND pin.