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ISL6298CR4Z-T Datasheet(PDF) 7 Page - Intersil Corporation |
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ISL6298CR4Z-T Datasheet(HTML) 7 Page - Intersil Corporation |
7 / 17 page 7 FN9173.4 March 9, 2006 Pin Description VIN (Pin 1, 15, 16 for 4x4; Pin 1 for 3x3) VIN is the input power source. Connect to a wall adapter. Fault (Pin 2) FAULT is an open-drain output indicating fault status. This pin is pulled to LOW under any fault conditions. Status (Pin 3) STATUS is an open-drain output indicating charging and inhibit states. The STATUS pin is pulled LOW when the charger is charging a battery. Time (Pin 4) The TIME pin determines the oscillation period by connecting a timing capacitor between this pin and GND. The oscillator also provides a time reference for the charger. GND (Pin 5) GND is the connection to system ground. TOEN (Pin 6 for 4x4; N/A for 3x3) TOEN is the TIMEOUT enable input pin. Pulling this pin to LOW disables the TIMEOUT function. Leaving this pin HIGH or floating enables the TIMEOUT limit. For the 3x3 DFN package, this pin is left floating internally. EN (Pin 7 for 4x4; Pin 6 for 3x3) EN is the enable logic input. Connect the EN pin to LOW to disable the charger or leave it floating to enable the charger. V2P8 (Pin 8 for 4x4; Pin 7 for 3x3) This is a 2.8V reference voltage output. This pin outputs a 2.8V voltage source when the input voltage is above POR threshold and outputs zero otherwise. The V2P8 pin can be used as an indication for adapter presence. IREF (Pin 9 for 4x4; Pin 8 for 3x3) This is the programming input for the constant charging current. IMIN (Pin 10 for 4x4; N/A for 3x3) IMIN is the programmable input for the end-of-charge current. For the 3x3 DFN package, this pin is shorted to the V2P8 pin internally. TEMP (Pin 11 for 4x4; Pin 9 for 3x3) TEMP is the input for an external NTC thermistor. The TEMP pin is also used for battery removal detection. VBAT (Pin 12, 13, 14 for 4x4; Pin 10 for 3x3) VBAT is the connection to the battery. Typically a 10 µF Tantalum capacitor is needed for stability when there is no battery attached. When a battery is attached, only a 1 µF ceramic capacitor is required. Typical Applications 4x4 QFN Package Options FIGURE 16. TYPICAL APPLICATION CIRCUIT FOR THE 4x4 QFN PACKAGE OPTIONS V2P8 EN GND VBAT IREF FAULT VIN 5V Wall Adapter Battery Pack IMIN TEMP STATUS TIME ISL6298 V2P8 TOEN T C 1 F µ 1 R 1 500 R 2 C 2 1 F µ R T R U F µ 1 C 3 R IREF k 80 C TIME nF 15 D 1 D 2 R IMIN k 80 500 ISL6298 |
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