MP2671 – CHARGE SYSTEM PROTECTION CIRCUIT

MP2671 Rev. 0.9

www.MonolithicPower.com

3

2/23/2009

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2009 MPS. All Rights Reserved.

Parameter

Symbol

Condition

Min

Typ

Max

Units

VB Pin Leakage Current

20

nA

Over Temperature Protection

Rising Threshold

140

°C

Over Temperature Protection

Falling Threshold

90

°C

Logic

EN

Input Logic HIGH

1.5

V

EN

Input Logic LOW

0.4

V

EN Internal Series Resistor

100

200

400

kΩ

WRN Output Logic Low

Sink 5mA current

0.35

0.8

V

WRN Output Logic High Leakage

Current

1

µA

Power MOSFET

On Resistance

Measured at 500mA,

170

280

mΩ

PIN FUNCTIONS

12-pin QFN

Name

Description

1,2

VIN

Input Power Source. VIN can withstand 30V input.

3

GND,

Exposed

Pad

System Ground. Exposed pad and GND pin must be connected to the same

ground plane.

4

WRN

Open-Drain Logic Output. This pin turns LOW when any protection event occurs.

5,6

NC

No Connect. Keep it floating.

7

EN

Enable. Leave this pin floating or pull it below 0.4V to enable the IC. Drive this pin

higher than 1.5V to disable the IC.

8

VB

Battery Voltage Monitoring Input. Connect this pin to the battery pack positive

terminal via an isolation resistor.

9

ILIM

Over-current Protection Threshold Setting. Connect a resistor between this pin

and GND to set the OCP threshold.

10,11

OUT

Output pin and input pin of the protected charger.

12

NC

No Connect. Keep it floating.