MP2604 – SINGLE CELL 1A LINEAR LI-ION BATTERY CHARGER W/O TRICKLE CHARGE

MP2604 Rev. 1.2

www.MonolithicPower.com

7

1/25/2010

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2.6V

4.2V

CC

Charging

Charging

Complete

CV

Charging

Figure 2—MP2604 Typical Charging Profile

Charge

Start

Charge

End

Soft-Start

Time

CC

Mode

CV

Mode

4.2V

CHG

Figure 3—MP2604 Typical Charging

Procedure

Battery Over-Voltage Protection and

Automatic Recharge

trimmed charge target, the MP2604 reduces its

charge current to 0µA. This ensures the safety

of the battery. Also, the CV control loop always

monitors the battery voltage such that it will

automatically recharge the battery when it is

depleted below the target level.

Programming of Charge Current and Battery

Full Current

The relationship of the charge current and the

programming resistance is established by the

following table and graph.

1.65

1000

1.82

900

2.05

800

2.32

700

2.74

600

3.3

500

4.12

400

5.6

300

8.45

200

15

100

Charge Current vs

1000

900

800

700

600

500

400

300

200

0

0.2

0.1

0.3 0.4

0.6 0.7

0.5

Resistance

The recommended resistance for programming

the IBF pin to GND:

BF

BF

R

k

7

.

1

A

1

I

Ω

×

=

CHG

is used to indicate charging status. When

the battery full condition is reached or any other

condition prevents the charger from charging,

CHG

will become a floating pin.