MP2615 – 2A, 1- CELL OR 2- CELL LI-ION BATTERY CHARGER

MP2615 Rev. 1.02

www.MonolithicPower.com

6

7/9/2019

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PIN FUNCTIONS

Package

Pin #

Name

Description

1

SW

Switch Output

2

VIN

Power Supply Voltage.

3

VCC

Coarse Regulator Output. Internally generated 4.5V. Bypass with a 1µF capacitor to AGND.

Used to be low-side switch driver and pull-up bias voltage NTC resistive divider. Do not

connect any external load at this pin.

4

CELL

Command Input for the Number of Li-Ion Cells. Connect this pin to VCC for 1-cell

application and short it to AGND or keep it floating for 2- Cell application.

5

SEL

Input Pin for Setting Terminal Battery Voltage:

SEL = Low-level or Float: VBATT = 4.2V/Cell.

SEL = High-level: VBATT =4.1V/Cell.

6

EN

On/ Off Control Input. This pin is pulled to GND with a 1Meg internal resistor. suggest to

connect a 100kΩ resistor in series with EN pin.

7

N/C

NO CONNECT. Please leave this pin floating.

8

AGND

Analog Ground.

9

BATT

Positive Battery Terminal.

10

CSP

Battery Current Sense Positive Input. Connect a resistor RS1 between CSP and BATT.

11

CHGOK

Charging Completion Indicator. A logic Low indicates charging operation. The pin will

become an open drain once the charge is completed or suspended.

12

ACOK

Valid Input Supply Indicator. A logic Low on this pin indicates the presence of a valid input

power supply.

13

NTC

Thermistor Input. Connect a resistor from this pin to the pin VCC and the thermistor from

this pin to ground.

14

TMR

Internal Safety Timer Control. Connect a capacitor from this node to AGND to set the timer.

And the timer can be disabled by connecting this pin to AGND directly.

15

BST

Bootstrap pin. A capacitor is needed to drive the power switch’s gate above the supply

voltage. It is connected between SW and BST pins to form a floating supply across the

power switch driver.

16

PGND

Power Ground.