ETA4056

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4

Empower, Transcend, Achieve!

PIN DESCRIPTION

ESOP8

PIN #

DFN2x2-8

PIN#

DFN2x3-8

PIN#

SOT23-6

PIN#

NAME

DESCRIPTION

1

6

6

NA

NTC

Battery Temperature Monitoring input pin. It sets the valid

temperature operating range for both battery charging and

discharging.

2

7

7

6

ISET

Program, Monitor the charge current and Shutdown. This pin

set to 1V in constant-current mode. The charge current is

programmed by connecting a 1% resistor (Rset), between

ISET, to GND pin. The charge current can be calculated

using the following formula:

IBAT=

1

Rset

×1000-(

1

3.6

×

1

Rset

×1000)

2

The ISET pin can also be used to switch the charger to

shutdown mode by disconnecting the program resistor from

ground.

3

5

5

2

GND

Ground.

4

1

1

4

VIN

Positive Input Supply. Needs to be bypassed with at least a

4.7μF capacitor.

5

8

8

3

BAT

Charge Current Output. This pin provides charge current to

the battery and regulates the final float voltage to 4.2V which

is set by an internal precision resistor divider.

6

2

2

NA

STDBY

Open-Drain Output for Charge Finished flag. The STDBY

pin outputs low when the battery is finished charging. When

in the status of charging, it becomes high-impendence.

7

3

3

1

STAT

Open-Drain Output for In Charging flag, The STAT pin

outputs low when the battery is in charging. Upon the

completion of the charge cycle, it becomes high-

impendence.

8

4

4

NA

EN

Enable the IC charger or not. Drive this pin high or floating

to enable charger, low to disable.