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M62244FP Datasheet(PDF) 2 Page - Renesas Technology Corp |
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M62244FP Datasheet(HTML) 2 Page - Renesas Technology Corp |
2 / 18 page M62244FP Rev.1.0, Sep.19.2003, page 2 of 17 Description of pins Protection diode No. Pin name I/O Function Positive Negative 18 Vcc Power-supply input gnd1 16 LED1 O LED drive Vcc gnd2 17 LED2 I/O LED drive (with function for switching the LEDs’ blinking period) The blinking period of LED1 is set to 0.6 Hz (typ.) by fixing this signal low. Vcc gnd2 15 GND2 Ground for power supply 9 STP I Forcible charge OFF H (or open): Charging possible, L: Charging stopped Vcc gnd1 8 COSC For connection to the capacitor used to set the oscillator circuit’s frequency Vcc gnd1 12 GND1 Ground 5 Tdet I Battery-temperature detection Vcc gnd1 10 Vref O Reference power-supply output Vcc gnd1 6 Vrchg I Adjustment of start-recharging voltage The pin voltage is set to 1.0 V (typ.). The voltage at which recharging starts (threshold) may be changed by using an external resistor etc. to adjust the voltage on this pin. The actual voltage is the voltage on this pin multiplied by 11.8 dB. Vcc gnd1 20 Idet1 I gnd1 1 Idet2 I Charging-current detection The drop in voltage across an external resistor RS (connected between these pins) reflects the size of the charging current and is used to detect the completion of charging. 2 Vsense I/O Battery-voltage detection Detects the battery-voltage value for use in charging control. gnd1 7 Ifull I Charging-completed current switching Select the current taken as indicating the completion of charging by leaving this pin open or connecting it to ground. The charging-completed current is controlled by comparing the voltage on the Ifull pin with the level 12 dB above the voltage drop between Idet1 and Idet2. Vcc gnd1 13 C1 Compensation for the charge-control phase A capacitor between C1 and ground improves the stability of oscillation during charging at constant current and constant voltage. Vcc gnd1 14 C2 For connection of a capacitor that comes into play during switching of the charging current Reduces overshooting of the charging current when the charging current is switched. Vcc gnd1 19 CTRL O Output for charge control Controls the base (gate of a p-ch transistor) of an external pnp transistor so that constant-current or constant-voltage charging is applied. gnd2 3 Vadp1 I For adjusting the adapter-detection voltage 1 (detection voltage when charging has stopped) Pin-voltage is set to 1.0 V (typ.). The value to be taken as adapter- detection voltage 1 is controlled by using an external resistor etc. to adjust the voltage on this pin. The actual voltage is the voltage on this pin multiplied by 14.3. Vcc gnd1 4 Vadp2 I For adjusting the adapter-detection voltage 2 (detection voltage during charging) Pin-voltage is set to 1.0 V (typ.). The value to be taken as adapter- detection voltage 2 is controlled by using an external resistor etc. to adjust the voltage on this pin. The actual voltage is the voltage on this pin multiplied by 13.9dB. Vcc gnd1 11 Vcvref O Reference voltage for constant-voltage control Vcc gnd1 |
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