ICS1700AM Galaxy Power, Inc., ICS1700AM Datasheet
ICS1700AM
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ICS1700AM Summary of contents
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QuickSaver® Charge Controller for Nickel-Cadmium and Nickel-Metal Hydride Batteries General Description The ICS1700A is a CMOS device designed for the intelligent charge control of either nickel-cadmium (NiCd) or nickel-metal hydride (NiMH) batteries. The controller uses a pulsed-current charging technique together ...
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ICS1700A Pin Configuration 1 CHG 2 DCHG PFN 3 CMN 4 ICS1700A OTN 5 SEL0 6 VSS 7 AVSS 8 16-Pin DIP Pin Definitions Pin Number Pin Name DIP SOIC 1 1 CHG 2 2 DCHG 3 3 PFN 4 ...
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Controller Operation Charging Stages The charging sequence consists of four stages. The application of current is shown graphically in Figure 1. The soft start stage gradually increases current levels up to the user selected fast charge rate during the first ...
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ICS1700A Initial Pulse Width cycle time Figure 3: Cycle-to-cycle increase of the soft-start current pulse widths Fast Charge In the second stage, the ICS1700A applies the charging current in a series of charge and discharge pulses. The technique consists of ...
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The discharge current pulse amplitude is typically set to about 2.5 times the amplitude of the charging current based on 1.4V/cell. For example, if the charge current is 4 amps, then the discharge current is set at about 10 amps. ...
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ICS1700A Charge Termination Methods Several charge termination schemes, including voltage slope, maximum temperature and a fast charge timer are available. The voltage slope method may be used with or without the maximum temperature method. Maximum temperature and the fast charge ...
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Battery Polling Upon power-up or after a reset is issued, any excess charge from filter capacitors at the charging system terminals is removed with a series of discharge pulses. After the discharge pulse series is complete, the voltage at VIN ...
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ICS1700A Pin Descriptions The ICS1700A requires some external components to control the clock rate, sense temperature and provide an indicator display. The controller must be interfaced to an external power source that will provide the current required to charge a ...
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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 ...
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ICS1700A Master Reset: MRN Pin The MRN pin is provided to re-program the controller for a new charging sequence. This pin has an internal pull-up of about 75k . A logic low on the MRN pin must be present for ...
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To set the voltage at the THERM pin for 1.67V the equivalent divider looks like Figure 9. Figure 9: Equivalent voltage divider The parallel resistance R is calculated 1.67V R 1.67V/10k The internal pull-up ...
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ICS1700A Using no temperature sensor temperature sensor is not used, the THERM pin must be grounded. Voltage Input: VIN Pin The battery voltage must be normalized by an external resistor divider network to one cell. The electrochemical potential ...
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Data Tables Supply Voltage Logic Input Levels Ambient Operating Temperature Storage Temperature Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only. Functional operation of the device at the ...
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ICS1700A R 16k , C 100pF PARAMETER Clock Frequency Reset Pulse Duration Charge Pulse Width Discharge Pulse Width Rest Time Data Acquisition Time Cycle Time Capacitor Discharge Pulse Width Capacitor Discharge Pulse Period Polling Detect Pulse Width Polling Detect Pulse ...
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Applications Information To ensure proper operation of the ICS1700A, external components must be properly selected. The external current source used must meet several important criteria to ensure optimal performance of the charging system. VIN Divider Resistors Figure 12 shows a ...
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ICS1700A Maximum Temperature Termination Maximum temperature termination is best suited as a safety back- up feature. Maximum temperature termination requires that the thermal sensor be in intimate contact with the battery. A low thermal impedance contact area is required for ...
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V in CONSTANT CURRENT SOURCE + (note 2) 390 390 1k 1 (note 3) 2 FAULT 3 CHG 4 TEMP Notes: 1) Value of R3 determined by discharge current and ...
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... All package dimensions are in inches. 20-Pin SOIC Package (300 mil) Ordering Information: ICS1700AM, ICS1700AMT, ICS1700AS, ICS1700AST, ICS1700AN Example: ICS 1700A ST Device type: Consists digits or numbers Prefix: ICS = Intelligent Charging Solution 0.406 0.031 0.294 ...
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Galaxy Power Incorporated makes no claim about the capability of any particular battery (NiCd or NiMH) to accept a fast charge. GPI strongly recommends that the battery manufacturer be consulted before fast charging. GPI shall be held harmless for any ...
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ICS1700A NOTES 20 ...
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NOTES 21 ICS1700A ...
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ICS1700A NOTES 22 ...
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NOTES 23 ICS1700A ...
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... ICS1700A GPI Sales Offices Headquarters Galaxy Power, Inc. PO Box 890 2500 Eisenhower Avenue Valley Forge, PA 19482-0890 Phone: 1-610-676-0188 FAX: 1-610-676-0189 Internet: www.galaxypower.com GPI Sales Representative January 19, 1999 24 ...