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FUNCTIONAL DESCRIPTION

NORMAL OPERATION

integrates Li-Battery Charger 、 Li-

Battery Protection and Boost converter in only

SOP8-PP package

Adapter inputs 5V voltage and charges the

battery. After the battery is full, get off the adapter .

And

then we can boost up to 5V to charge the

mobile advices when they is empty.

Li-Battery Charger can set charge current by

PROG resistor. Normal charging current is set from

0.5A to 1A. It will go into trickle charge mode to

protect Li-Battery when BAT voltage is below 2.9V.

Li-Battery Protection can detect the battery cell

’s

status such as Vcu、Vcl，Temp、short-cut、Over-

current and take action to protect battery cell.

Boost section can give us 5V 0.8A capacity to

mobile devices.

THERMAL OR SHORT-CUT

PROTECTION

A thermal shutdown is implemented to prevent

damages

due

to

excessive

heat

and

power

dissipation.

Typically

the

thermal

shutdown

threshold is 150℃ .When the thermal shutdown is

triggered the device stops switching until the

temperature falls below typically 136 ℃ .Then the

device starts switching again.

If the Boost converter

’s Vout is short to GND，

the IC will shut down and you should recharge the

battery to get rid of this status.

Overdischarge Detection

Voltage of Li BAT-Protection

2.85

2.9

2.95

V

Overdischarge Release

Voltage of Li BAT-Protection

2.95

3.0

3.05

V

Overdischarge Current1

Detection of Li BAT-

Protection

2.1

3

3.9

A

Load Short-Circuiting

Detection of Li BAT-

Protection

10

20

30

A

Boost output voltage range

Vout

14

V

Regulated Feedback

Voltage

1.20

1.225

1.25

V

Peak Inductor Current

1.6

A

Boost Convert

Oscillator Frequency

0.9

1.2

1.5

MHz

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