AIC1804 Просмотр технического описания (PDF) - Analog Intergrations

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AIC1804

Three- Or Four-Cell Lithium-Ion Battery Protection IC

Analog Intergrations 

AIC1804

n BLOCK DIAGRAM

CS

3

VCC 16

VC1 14

VC2 12

VC3 10

B attery

Voltage

Sense

Circuit

UD1 15

300

13

UD2

350

11

UD3

400

UD4 9

450

GND 8

VCC-0.15V

VCC-0.3V

VCC-1V

1.2V

VCC+0.4V

Wake-Up Control

Overcurrent Delay

Circuit

4 OD

Overdischarge Delay

Circuit

Overcharge Delay

Circuit

P ower-Down

Control

2 OC

n PIN DESCRIPTIONS

PIN 1: NSL-

Input pin for cell number

selection. Connect this pin to

VCC for three-cell application

and to GND for four-cell

application.

PIN 2: OC-

NMOS open drain output for

control of the charge control

MOSFET M2. When overcharge

occurs, this pin sinks current to

switch the external PNP Q1 on,

and charging is inhibited by

turning off the charge control

MOSFET M2.

PIN 3: CS-

Input pin for current sensing.

Using the drain-source voltage of

the discharge control MOSFET

M1 (voltage between VCC and

CS), it senses discharge

current during normal mode

and detects whether charging

current is present during

power-down mode.

7 56

TC TD TI

PIN 4: OD - Output pin for control of discharge control M

PIN 5: TD -

Overdischarge delay time setting

pin.

PIN 6: TI -

Overcurrent delay time setting

pin.

PIN 7: TC -

Overcharge delay time setting

pin.

PIN 8: GND - Ground pin. This pin is to be

connected to the negative

terminal of the battery cell BAT4.

PIN 9: UD4-

This pin is to be connected to the

positive terminal of the battery

cell BAT4 for cell-balancing

bleeding

function

under

overcharge condition.

PIN10: VC3-

Input pin for battery BAT4

voltage sensing. This pin is to be

connected to the positive

terminal of the battery cell BAT4.

PIN11: UD3 - This pin is to be connected to

7

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