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ICS1708ST

Description
QuickSaver Charge Control IC for Nickel-Cadmium and Nickel-Metal Hydride Batteries
File Size379KB,16 Pages
ManufacturerETC
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ICS1708ST Overview

QuickSaver Charge Control IC for Nickel-Cadmium and Nickel-Metal Hydride Batteries

ICS1708
QuickSaver® Charge Control IC for Nickel-Cadmium
and Nickel-Metal Hydride Batteries
General Description
The
ICS1708
is a low cost 8 pin CMOS control IC for the intelligent charging of either nickel-cadmium (NiCd) or nickel-metal hydride
(NiMH) batteries. The
ICS1708
uses a pulsed-current charging technique together with multiple voltage slope termination methods. The
ICS1708
employs a four stage charge sequence that provides a complete recharge without overcharging. The controller has three (3) user
selectable charge rates, user accessible clock, and two (2) charge status output pins. On power-up, the
ICS1708
monitors for the presence of
a battery and begins charging. The
ICS1708
is for applications where battery temperature protection is not required of the charge controller.
Applications
Embedded and charger stands for: Portable consumer products, Power tools, Audio/video products, Communications products, RC toys,
and Wireless products
Features
Charge termination methods include: Voltage slope (+
V
/dt and +/- peak detect), and Fast charge time out to maintenance mode
Four stage charge sequence:
SoftStart
conditioning, Fast charge, Topping charge, and Maintenance charge
Three (3) user selectable charge rates: 15 minutes (4C), 60 minutes (1C), 150 minutes (C/2.5)
Continuous polling mode for battery detection
Adjustable open circuit (no battery) voltage reference
Benefits
-compared to other methods
Peak battery performance and extended cycle life
Improved battery efficiency and reliability
Lower internal resistance build-up
Lower capacity fade
Block Diagram
OPEN CIRCUIT
REFERENCE
VOLTAGE
0.5V
BATTERY
VOLTAGE
SENSE
MICROCODE CONTROL
FAST
CHARGE
PROCESSOR
OUTPUT
CONTROL
CHARGE
COMPLETE
CURRENT
SOURCE
ADC
RAM
RC (CLOCK)
ROM
OSCILLATOR

ICS1708ST Related Products

ICS1708ST ICS1708 ICS1708N ICS1708S
Description QuickSaver Charge Control IC for Nickel-Cadmium and Nickel-Metal Hydride Batteries QuickSaver Charge Control IC for Nickel-Cadmium and Nickel-Metal Hydride Batteries QuickSaver Charge Control IC for Nickel-Cadmium and Nickel-Metal Hydride Batteries QuickSaver Charge Control IC for Nickel-Cadmium and Nickel-Metal Hydride Batteries
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