Rev 2, 19-May-15

- 3 -

www.active-semi.com

Copyright © 2015 Active-Semi, Inc.

ACT2813/ACT2813C

PIN DESCRIPTIONS

PIN

NAME

DESCRIPTION

1

LED1

Battery level indicator. An internal 3.5mA sink current limit is built in.

2

ICST

Fast charge current setting pin. Connect a resistor from this pin to AGND to set the

charge current. The current setting ranges from 1.0A-3.0A.

3

IOST

Output current setting. Connect a resistor from this pin to AGND to set output constant

current. The current setting ranges from 1.0A-3.0A.

4

CSP

Positive terminal of charge current sense input. Kevin sense is required with 10nF

ceramic capacitor right across CSP and CSN pins.

5

VBAT/CSN

Battery input and negative terminal of charge current sense input. Connected to the

battery pack positive terminal to provide power in High-Z mode. Bypass to PGND with

a high quality ceramic capacitor placed as close to the IC as possible.

6

PGND

Power ground. PGND is connected to the source of low-side N-channel MOSFET and

the MOSFET’s gate driver. PGND must be connected to AGND externally through

ground plane.

7, 8

SW

Internal switch to output inductor terminal.

9

VOUT

Output pin. Bypass to PGND with a high quality low ESR and ESL ceramic capacitor

placed as close to the IC as possible.

10

VIN

USB or AC adaptor input. When VIN is valid, charge and power path is enabled.

11

AGND

Analog ground. AGND must be connected to PGND externally through ground plane.

12

nPG

Drive external P-FET to protect output short circuit and leakage during shutdown. nPG

pin is pulled up to VOUT internally. nPG pin is pulled low if VOUT is in the range.

13

PB

Push button input, connect a push button from this pin to AGND, internally pulled up

by a 3MΩ resistor to battery. PB starts up boost converter if HZ pin is grounded and

VIN is not present. When this pin is pushed for 30ms, LED1-4 indicators are enable for

5 seconds.

14

HZ

Boost/high-Z mode enable pin, internally pulled up by a 3MΩ resistor to battery. When

HZ pin is pulled ground, boost is enabled if VIN is not present.

15

TH/FLD

TH: ACT2813

Temperature sensing input. Connect to battery thermistor terminal. If no use, put 10K

pulled down resistor.

FLD: ACT2813C

Open-drain flashlight driver. A internal switch can handle up to 50mA.

16

BLVS

Battery level voltage shift. Connect a resistor from this pin to AGND to shift the battery

LED indication thresholds.

17

RIMC

Battery impendence compensation input. Connect to a resistor from this pin to APNG

to program the battery impedance.

18

LED4

Battery level indicator. An internal 3.5mA sink current limit is built in.

19

LED3

Battery level indicator. An internal 3.5mA sink current limit is built in.

20

LED2

Battery level indicator. An internal 3.5mA sink current limit is built in.

21

EP

Exposed pad. Must be soldered to ground on the PCB.