JM1188锂离子电池保护IC

BATTERY PROTECTORSOLUTION IC

No External MOSFETs Required Integrate MOSFET with Equivalent of 50mOHM Rdson

Only one external capacitor required Over temperature protection Three-step Over discharge current detection:OC1,OC2 and short circuiting Charger detection Function Delay times are generated internally -operation mode: 2uA typ -Power down mode : 0.1uA max

FEATURES

• • • • • • •

GENERAL DESCRIPTION

The JM1188 is a battery protect solution IC which is integrated with built-in the protection IC to use a lithium-ion/polymer batteries developed for one cell series. The device contains all required protection control circuits together with

very-low-resistance MOSFETs to minimize the number of external components. The protection IC is composed of three voltage detectors, over current, short detection circuit, reference voltage sources, oscillator, counter circuit and logical circuits. The device is not only targeted for digital cellular phones, but also for any other Li-ion/pol battery powered information appliances requiring long term battery life.

• Overcharge current detection • Low Current Consumption:

• • •

High accuracy voltage detection RoHS Compliant and Lead (Pb) Free Tiny SOT23-5 Package

APPLICATIONS

•

Lithium-ion/Polymer Battery Pack

B+/P+1VCCVM50.1uFB-Battery2GND3VDDVM4P -Figure1. Typical Application Circuit

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JM1188

Absolute Maximum Ratings

VCC Voltage…….... ……… -0.3V to 6V Operating Temperature Range … -40°C to +85°C VM Voltage……………….... -6V to 11V Junction Temperature(Note2) ……………..125°C VDD Voltage…………-0.3V to (VCC+0.3V) Storage Temperature Range ..…-65°C to 150°C Power Dissipation at T=25°C ………0.4W Lead Temperature(Soldering,10s) ….…..+300°C

Package/Order Information

Pin Description

PIN

1

NAME

VCC

FUNCTION

Core circuit power supply pin

2 GND Ground Pin 3 4,5

VDD VM

Positive Power Input

The negative charge input, over current detection

ORDERING INFORMATION

Part Number

Overcharge Detection

OverchargeRelease

OverdischargeDetection Voltage(Vdl)

OverdischargeRelease Voltage(Vdr)

Overcurrent Detection Current(OCD1)

2A Voltage(Vcu) Voltage(Vcr)

JM1188 4.3V 4.1V 2.4V 3.0V

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JM1188

Electrical Characteristics

(Typical and limits appearing in normal type apply for Ta=25°C.)

Parameter Conditions MIN TYP MAX unit

Overcharge Detection Voltage Overcharge Release Voltage Over discharge Detection Voltage Over discharge Release Voltage Charger Detection Voltage

Overcharge Current Detection Current

4.25 4.3 4.35 V 4.05 4.1 4.15 V 2.3 2.9

2.4 3.0

2.5 3.1

V V V A

VDD=3.5V

-0.06 -0.13 -0.2 1.0

2.0

3.0

Over discharge Current1 Detection Current VDD=3.5V Over discharge Current2 Detection Current VDD=3.5V Load Short-Circuiting Detecting Current Current Consumption in normal operation Current Consumption in power down Equivalent FET on Resistance Over Temperature Protection Over Temperature Recovery Degree Overcharge Voltage Detection Delay Time Over discharge Voltage Detection Delay Time

VDD=3.5V VDD=3.5V VDD=2V

VDD=3.6V,Ivm=1A

1.0 2.0 3.0 A 3.0 4.0 6.0 A 6.0

10 2.0 55 120 100 120 24 8 4 500

14 3.0 0.1

A uA uA

80 mohm

°C °C mS mS mS mS uS

Over discharge Current1 Detection Delay Time Over discharge Current1 Detection Delay Time Load Short circuiting Detection Delay Time

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JM1188

Functional Block Diagram

VCCVoltage divider- +- +- +Power on OverchargeOverdischargeOverchargeResetCurrent CompVoltage CompVoltage CompBandgap referenceGNDOscillatorLogic ContollerShort CircuitOverdischarge Compcurrent 2 CompOverdischarge current 1 CompSmart SwitchOver-temperature ProtectionCharge detection- +- +- +VM Figure 2. JM1188 Block Diagram

Functional Description

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