AIC1782 datasheet(7/17 Pages) AIC

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AIC1782

BLOCK DIAGRAM

LEB2 LEB1

LEA2

LEA1

ICOB

ICOA

Display

Control

Unit

TMR

Timing

Control Unit

GND VCC

Bandgap

Reference

& Voltage

Regulator

MODE

Selection

SEL3

Battery Voltage

& Temperature

Protection

Setting

SEL2

SEL1

LED Display&

Trickle Charge

Duty Setting

Charge Control

State Machine

CHARGE END

DSW

DIS

BBV

ATS

ADJ

Charge

Control Unit

∆T/∆t Detection

Setting

Battery Temperature

Protection

Battery Voltage

Protection

Discharge

Control Unit

13-bit A/D

Oscillator

BTS

ABV

PIN DESCRIPTIONS

PIN 1: ABV - Divided battery voltage input to

sense the battery voltage of

pack A.

PIN 2: BBV - Divided battery voltage input to

sense the battery voltage of

pack B.

PIN 3: DIS

- Push-pull output, used to con-

trol an external transistor to dis-

charge the battery of pack B.

DIS is active high when function

of discharge is enabled.

PIN 4: BTS - The battery cell temperature of

pack B is represented as a volt-

age input to the AIC1782 at this

pin. The acceptable voltage

range of BTS pin is 0.29 VCC to

0.72 VCC.

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 approxi-

mately 0.28V to 3.8V. If volt-

age higher than VCC - 0.3V,

function of

∆∆

T / t detection is

disabled.

PIN 7: SEL3

- Determining the acceptable

voltage range of ABV and

BBV pins and mode of tem-

perature protection function.

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