MP26056- 28V, LI+SINGLE-CELL BATTERY CHARGER WITH USB/AC-ADAPTER INPUT
MP26056 Rev. 0.91 www.MonolithicPower.com 4
3/30/2009 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2009 MPS. All Rights Reserved.
PIN FUNCTIONS
Pin # Name Description
1 IN Input Supply Pin. IN receives the AC adapter or USB supply voltage.
2
ACOK
Open-Drain OVP Indicator. This pin is low when 3.5V < V
IN
< 6.5V.
3
CHG
Open-Drain Charge Indicator. This pin is low during charging, is High after battery full or
termination,
4 MOD
USB input enable pin. Active High. Used to reduce charge current when USB is the
supply.
5
GND,
Exposed Pad
Ground. Exposed Pad must be connected to GND plane.
6 SHDN
Charger IC Enable. An input “Low” signal at this pin or if the pin is floating will enable
the IC. An input “High” will disable the IC.
7 IBF
Charge Status Threshold Program. Connect this pin to an external resistor to program
the charge termination current or battery full indication threshold. I
BF
=1.7/Rbf
8 ISET1
USB Constant Charge Current Program pin. Connect this pin to an external resistor to
program the charging current in CC Mode. I
CHG
=1.7/Rset1 when Mod=HIGH
9 ISET2
Additional Constant Charge Current Program pin for AC input. Connect this pin to an
external resistor to program the charging current in AC Mode. I
CHG
=1.7/(Rset1// Rset2)
when Mod=LOW
10 BATT Charger Output.
