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AIC1781A Datasheet(PDF) 8 Page - Analog Intergrations Corporation |
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AIC1781A Datasheet(HTML) 8 Page - Analog Intergrations Corporation |
8 / 18 page AIC1781A 8 n PIN DESCRIPTIONS PIN 1: PEAK- Tri-level input, determining the period of peak voltage timer. (See 0 ∆V cut-off section in application informations.) PIN 2: VBT- Divided battery voltage input to sense the battery voltage. PIN 3: DIS- Push-pull output, used to control an external transistor to discharge the battery. DIS is active high when the AIC1781A enters discharge mode. PIN 4: VTS- The battery cell temperature is represented as a voltage input to the AIC1781A at this pin. The acceptable voltage range of VTS pin is 0.29VCC to 0.72VCC. The battery temperature is regarded as too high if the voltage of VTS pin is lower than 0.29VCC, and is otherwise regarded as too low if the voltage of VTS pin is higher than 0.72VCC. PIN 5: VCC- Power supply input at 5V ±10%. PIN 6: ADJ- For adjusting the slope of ∆T/∆t. Acceptable voltage range for this pin is approximately 0.28V to 3.8V. If voltage higher than VCC-0.3V, the function of ∆T/∆t detection is disabled. PIN 7: SEL3- Determine the acceptable voltage range of VBT pin and mode of temperature protection function. PIN 8: TMR- Determine the period of safety timer with an external resistor connected to GND. PIN 9: MODE- Determine the mode of operation for the AIC1781A. PIN 10: SEL2 - Tri-level inputs, that jointly control the LED display mode and the duty of trickle charge after the completion of fast charge. PIN 11: SEL1- The same as Pin 10. PIN 12: GND- Power ground. PIN 13: LED1 & PIN 14: LED2- Open-drained outputs used to indicate the battery charging status. Two modes of display are available, depending on the setting of SEL1 and SEL2 pins. PIN 15: ICON- Open-drained output, used to control the charging current to the battery. PIN 16: DSW- Controlling the function of discharge- before- charge. (See discharge- before- charge subsection in application informations). |
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