AIC1781A 查看數據表（PDF） - Analog Intergrations
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产品描述 (功能)
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AIC1781A Datasheet PDF : 18 Pages
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AIC1781A
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).
8
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