Connection Diagram

Pin Description

Pin No.

Symbol

I/O

Description

1V

I

Battery pack high side sense input.

2V

I

Battery pack low side sense input.

3

CSR

I

Current Sense Resistor high side input.

4

PFD

O

Pass FET gate Drive output. (N-channel).

5I

COMP

I

Compensation pin for current regulation loop.

6

MCO

O

Modulation Control Output- analog control signal output

7V

COMP

I

Compensation pin for voltage regulation loop.

8I

SET

I

Charge current adjust input pin (see application section).

9V

SET

I

Charge termination voltage control input (V

V

SET

= LO for 4.1V).

10

LED1

O

LED driver #1 output (open drain).

11

LED2

O

LED driver #2 output (open drain).

12

ChgInt

I

Charge current interrupt (active LO).

13

Enable

I

Enable charge cycle control.

14

Boost

I

Maximum output current boost control (max output current

increased by 80%).

15

V

SS

S

IC common.

16

V

DD

S

IC power supply.

16-Lead SOIC

DS100107-18

Top View

Order Number LM3621M or LM3621M-3.0

NSC Package Number M16A

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