EC49020

4D25N-Rev.P001

Page 2 of 11

High Efficiency 2A 1.5MHz

Single Cell Li-ion Battery Switching Charger

Pin Configuration

Pin Description

Pin NO.

Pin Name

Description

1

2

BAT

Battery connection. Connect to the positive terminal of the battery. Bypass BAT to GND

with a 20uF capacitor.

3

BS

High Side MOSFET Gate Driver Supply. Connect a 0.1uF ceramic capacitor from BS to

SW to supply the gate drive for the high side MOSFETs.

4

SW

Switching node. Connect SW to the external inductor.

5

IC power supply of internal bias and power devices. Bypass 20uF MLCC ceramic capacitor

6

TS

GND. Pull TS to GND and disable charge function.

7

the charge current. The charge current is programmable from 0.5A to 2A.

8

STAT

Charge Status Open Drain Output. STAT is pulled low when a charge cycle starts and

remains low while charging. STAT is high impedance when the charging terminates and

when no supply exists. STAT is blinking when IC detect fault conditions.

HIGH

LOW

Blinking

Charge complete

Charge in progress

Fault

EP

GND

The exposed thermal pad and the IC ground pin.