AIC1782 查看數據表（PDF） - Analog Intergrations

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AIC1782

Dual-Battery Charge Controller

Analog Intergrations 

AIC1782

PIN 8: TMR

- Determining the period of

safety timer with an external

resistor connected to GND.

PIN 9: ATS

- The battery cell temperature

of pack A is represented as a

voltage input to the AIC1782

at this pin. the acceptable

voltage range of ATS is 0.29

VCC to 0.72 VCC.

PIN 10:

PIN 11:

LEA1 &

LEA2 - Open-drained outputs used to

indicate the charging status of

the battery pack A.

PIN 12: ICOA - Open-drained output, used to

control the charging current of

the battery pack A.

PIN 13: MODE - Determining the mode of op-

eration for the AIC1782.

PIN 14: SEL2 &

PIN 15: SEL1

- Tri-level inputs, that jointly

control the LED display mode

and the duty of trickle charge

after the completion of fast

charge.

PIN 16: GND - Power ground.

PIN 17:

PIN 18:

LEB1 &

LEB2

- Open-drained outputs used to

indicate the charging status of

battery pack B

PIN 19: ICOB

- Open-drained output, used to

control the charging current of

the battery pack B.

PIN 20: DSW

- Controlling the function of dis-

charge-before-charge of the

battery pack B. (See dis-

charge-before-charge sub-

section in application informa-

tions).

APPLICATION INFORMATIONS

THE AIC1782 OPERATION

Power-on and Battery Prequalifying

The AIC1782 is a sequential charger, initiating a

charge action on either battery pack A or B.

When power is first applied to the AIC1782, all

internal digital circuit of the AIC1782 are reset

by the internal power-on-reset circuitry, the out-

put of LED‘s (depending on the setting of SEL1

and SEL2 pins) flash 3 times to indicate the ini-

tiation of power-on. If both battery pack A and B

are present when VCC is applied to the AIC1782,

the charge action begins with battery pack A if

conditions are acceptable.

Condition of battery pack A is examined through

the ATS and ABV pins, while battery pack B is

examined through the BTS and BBV pins. The

acceptable limits of ABV and BBV are deter-

mined by the input voltage of SEL3 pin and the

acceptable temperature sense voltage window

for ATS and BTS are 0.29 VCC to 0.72 VCC.

The AIC1782 controls the initiation of a charge

action and checks for acceptable battery volt-

age and temperature prior to fast charging. If

the voltage of ABV or BBV fail to fall within the

predetermined acceptable limits, the corre-

sponding battery pack enters a charging-

suspending mode. If the voltage of ATS or BTS

is outside the 0.29 VCC to 0.72 VCC window, ac-

tion to AIC1782 is determined by the input volt-

age of SEL3 pin.

Discharge-Before-Charge

8

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