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

MP2604 Rev. 1.2

www.MonolithicPower.com

3

1/25/2010

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Parameter

Symbol Condition

Min

Typ

Max

Units

OVP Hysteresis

400

mV

CHG

, ACOK Sink Current

Pin Voltage = 0.4V

8

mA

Battery Reverse Current to

BATT Pin

EN

= Low and Input = Floating

or 0V

1

µA

Switch-On Resistance

0.35

Ω

Soft Thermal Shutdown

Threshold

105

120

135

°C

Soft Thermal Shutdown

Hysteresis

10

°C

Soft-Start Time

10

20

35

ms

Notes:

PIN FUNCTIONS

Pin #

Name Description

1

IN

Input Supply Pin. IN receives the AC adapter or USB supply voltage.

2

CHG

Open-Drain Charge Status Indicator. This pin is low during charging.

3

ACOK

Open-Drain Input ACOK Indicator. This pin is low if the voltage at the IN pin is between 2.5V

and 6V.

4

EN

Charger IC Enable. An input “Low” signal at this pin or if the pin is floating will enable the IC.

5

NTC

Negative Thermal Coefficient (NTC) Thermistor Pin. Connect a 500kΩ resistor from this pin to

the IN pin and a 100kΩ NTC resistor (within the battery pack) from this pin to ground. If the

NTC function is not used, replace the NTC resistor with a regular 100kΩ resistor from this pin

to ground. Do not leave this pin floating.

6

GND

Ground.

7

SS

Soft-Start Timer. Connect this pin to an external capacitor to program the soft-start startup time

using the equation:

sec

m

20

F

1

.

0

C

T

SS

SS

×

µ

=

.

8

IBF

Charge Status Threshold Program. Connect this pin to an external resistor to program the

charge termination current or battery full charge current.

9

ISET

Constant Charge Current Program. Connect this pin to an external resistor to program the

charging current in CC Mode.

10

BATT

Charger Output.