MP2608- 28V, 1A DUAL INPUT LINEAR BATTERY CHARGER WITH TIMER

MP2608 Rev. 0.9

www.MonolithicPower.com

4

8/29/2008

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PIN FUNCTIONS

Pin #

Name

Description

1

IN

Input Supply. IN receives the AC adapter supply voltage.

2

USB

Input Supply. USB receives the USB supply voltage.

3

FAULT

Open-Drain Fault Status Indicator. This pin is low under any fault conditions.

4

STATUS

Open-Drain Charge Indicator. This pin is low during charging.

5

SHDN

Charger IC Shut-down. Pull SHDN high to disable the IC or leave it floating to

enable the IC.

6

IBF

Programmable Input for end of charger current.

7

TMR

Oscillator Period Timer. Connect a timing capacitor between this pin and GND to

set the oscillator period. A 1uF capacitor on the TMR pin will make the oscillator

period 400ms.

8

GND

Ground. Exposed pad and GND must connect to same ground plane.

9

ICHG

Constant Charge Current Program for the IN input. Connect this pin to an external

resistor to program the charging current in CC Mode when the current from the IN

pin charges the battery.

10

BATT

Charger Output.