ICS1700A Datasheet, PDF (9/24 Pages) List of Unclassifed Manufacturers – QuickSaver Charge Controller for Nickel-Cadmium and Nickel-Metal Hydride Batteries

ICS1700A
Charge Rate Selection: SEL0, SEL1 Pins
The SEL0 and SEL1 inputs must be programmed by the user to
inform the ICS1700A 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
75kΩ pull-up to VDD. The voltage ranges for low (L) and high (H)
are listed in Table 6, DC Characteristics. To program the SEL0
and SEL1 inputs, refer to the Charge Rate List in Table 2.
The ICS1700A 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.
Table 2: Charge Rate List
SEL0
L
L
H
H
SEL1
L
H
L
H
Charge Rate
4C (15 min)
2C (30 min)
1C (60 min)
C/2 (120 min)
Topping Charge
pulse Rate
one every 40 sec
one every 20 sec
one every 10 sec
one every 5 sec
Maintenance Charge Pulse
Rate
one every 160 sec
one every 80 sec
one every 40 sec
one every 20 sec
Fast Charge Timer
Duration (after reset)
30 min
60 min
90 min
210 min
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.
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