ICS1700AM Galaxy Power, Inc., ICS1700AM Datasheet - Page 17

• Manufacturer Part Number: ICS1700AM
• Description: 20 Pin Quicksaver Full-featured Charge Controller For Ni-cd & Ni-mh Batteries.
• Manufacturer: Galaxy Power, Inc.

+ 5 V
V in
390
+ 5 V
390
(note 3)
Q1 (note 2)
Notes:
1) Value of R3 determined by discharge current and capacity of battery pack.
2) Discharge FET is logic-level compatible in this application.
3) DC return of discharge FET must be connected close to negative battery terminal.
4) Resistor is needed only if a thermistor is used. Value may change depending on thermistor.
5) Regulated supply
6) Power ground; others are signal ground. Connect signal ground to power ground
at negative battery terminal only.
CONSTANT
CURRENT
1k
FAULT
SOURCE
TEMP
CHG
1
2
3
4
5
6
7
8
AVSS
CHG
DCHG
PFN
CMN
OTN
SEL0
VSS
ICS1700A
Figure 12: Functional Diagram
unused
THERM
R3 (note 1)
VREF
SEL1
VDD
MRN
VIN
RC
+ 5 V (note 5)
16
15
14
13
12
11
10
9
17
4.7µF
+ 5 V
.047µF
16k
100pF
.047µF
R1
R2
(note 6)
+ 5 V
temperature
ICS1700A
27k (note 4)
10k
@ 25°C
options
sense
open
@ 45°C