LM3621 National Semiconductor, LM3621 Datasheet - Page 2

• Manufacturer Part Number: LM3621
• Description: Single Cell Lithium-Ion Battery Charger Controller
• Manufacturer: National Semiconductor

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Connection Diagram
Pin Description
Pin No.
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
Symbol
V
V
CSR
PFD
I
MCO
V
I
V
LED1
LED2
ChgInt
Enable
Boost
V
V
COMP
SET
BAT
BAT
COMP
SET
SS
DD
+
−
Order Number LM3621M or LM3621M-3.0
I/O
NSC Package Number M16A
O
O
O
O
S
S
I
I
I
I
I
I
I
I
I
I
16-Lead SOIC
Top View
Description
Battery pack high side sense input.
Battery pack low side sense input.
Current Sense Resistor high side input.
Pass FET gate Drive output. (N-channel).
Compensation pin for current regulation loop.
Modulation Control Output- analog control signal output
Compensation pin for voltage regulation loop.
Charge current adjust input pin (see application section).
Charge termination voltage control input (V
V
LED driver #1 output (open drain).
LED driver #2 output (open drain).
Charge current interrupt (active LO).
Enable charge cycle control.
Maximum output current boost control (max output current
increased by 80%).
IC common.
IC power supply.
SET
2
= LO for 4.1V).
DS100107-18
SET
= HI for 4.2V or