ICS1712M GALAXY [Galaxy Power, Inc.], ICS1712M Datasheet - Page 11

• Manufacturer Part Number: ICS1712M
• Description: Charge Controller for Nickel-Cadmium and Nickel-Metal Hydride Batteries
• Manufacturer: GALAXY [Galaxy Power, Inc.]

Charge Rate Selection: SEL0, SEL1 Pins
The SEL0 and SEL1 inputs must be programmed by the user to
inform the ICS1702 of the desired charge rate. When a low level is
required, the pin must be grounded. When a high level is required,
no connection is required since each pin has an internal 75k
up to V
Table 8, DC Characteristics. To program the SEL0 and SEL1
inputs, refer to the Charge Rate List in Table 3.
See the section on Controller Operation for additional information on the topping charge and maintenance charge. See the section on Charge Termination
Methods for additional information on the charge timer.
SEL0
H
H
L
L
DD
. The voltage ranges for low (L) and high (H) are listed in
SEL1
H
H
L
L
C/2 (120 min)
Charge Rate
4C (15 min)
2C (30 min)
1C (60 min)
Table 3: Charge Rate List
Topping Charge
one every 40 sec
one every 20 sec
one every 10 sec
one every 5 sec
pulse Rate
pull-
11
The ICS1712 does not control the current flowing into the battery
in any way other than turning it on and off. The required current
for the selected charge rate must be provided by the user’s power
source. The external charging circuitry should provide current at
the selected charge rate. For example, to charge a 1.2 ampere hour
battery in 30 minutes (2C), approximately 2.4 amperes of current is
required.
Maintenance Charge Pulse
one every 160 sec
one every 80 sec
one every 40 sec
one every 20 sec
Rate
Duration (after reset)
Fast Charge Timer
ICS1712
210 min
30 min
60 min
90 min