XB5353A

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XB5353A

One Cell Lithium-ion/Polymer Battery Protection IC

GENERAL DESCRIPTION

The XB5353 series product is a high integration solution for lithium-ion/polymer battery protection. XB5353 contains advanced power MOSFET, high-accuracy voltage detection circuits and delay circuits. XB5353 is put into an ultra-small SOT23-5 package and only one external component makes it an ideal solution in limited space of battery pack.

XB5353 has all the protection functions required in the battery application including overcharging, overdischarging, overcurrent and load short circuiting protection etc. The accurate overcharging detection voltage ensures safe and full utilization charging. The low standby current drains little current from the cell while in storage.

The device is not only targeted for digital cellular phones, but also for any other Li-Ion and Li-Poly battery-powered information appliances requiring long-term battery life.

FEATURES

· Protection of Charger Reverse Connection

· Protection of Battery Cell Reverse Connection

· Integrate Advanced Power MOSFET with Equivalent of 54m? RDS(ON) · Ultra-small SOT23-5 Package · Only One External Capacitor Required

· Over-temperature Protection · Overcharge Current Protection · Two-step Overcurrent Detection: -Overdischarge Current -Load Short Circuiting · Charger Detection Function · 0V Battery Charging Function - Delay Times are generated inside · High-accuracy Voltage Detection · Low Current Consumption

- Operation Mode: 2.8μA typ. - Power-down Mode: 0.1μA max. · RoHS Compliant and Lead (Pb) Free

APPLICATIONS

? One-Cell Lithium-ion Battery Pack ? Lithium-Polymer Battery Pack

Figure 1. Typical Application Circuit

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OverchargOvercharge Overdischarge Overdischarge Overcurrent

Detection Release Detection PART Packe Detection Release

Voltage Voltage Voltage Voltage Current NUMBER age

[IOV1] (A) [VCU] (V) [VCL] (V) [VDL] (V) [VDR] (V) XB5353A

SOT

23-5

4.30

4.10

2.40

3.0

3

Top Mark

5353AYW(note)

Note: “YW” is manufacture date code, “Y” means the year, “W” means the week

PIN CONFIGURATION

Figure 2. PIN Configuration

PIN DESCRIPTION

XB5353 PIN NUMBER

PIN NAME

PIN DESCRIPTION

1 V T Test pin；only for vendor not used by application 2

GND

Ground, connect the negative terminal of the battery to this pin

3 VDD Power Supply

The negative terminal of the battery pack. The internal FET switch 4,5 VM connects this terminal to GND

ABSOLUTE MAXIMUM RATINGS

(Note: Do not exceed these limits to prevent damage to the device. Exposure to absolute maximum rating conditions for long periods may affect device reliability.) VDD input pin voltage VM input pin voltage

Operating Ambient Temperature Maximum Junction Temperature -0.3 to 6 -6 to 10 -40 to 85

V V °C

PARAMETER VALUE UNIT 125 °C

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Storage Temperature Lead Temperature ( Soldering, 10 sec) Power Dissipation at T=25°C

Package Thermal Resistance (Junction to Ambient) θJA Package Thermal Resistance (Junction to Case) θJC ESD

-55 to 150

0.4

°C W

300 °C 250 °C/W 130 °C/W 2000 V ELECTRICAL CHARACTERISTICS

Typicals and limits appearing in normal type apply for TA = 25oC, unless otherwise specified

Parameter Detection Voltage Overcharge Detection Voltage

Symbol

Test Condition Min Typ Max Unit V VCU

VDD=3.5V 4.25 4.05 2.3 2.9 -0.07 4.30 4.10 2.4 3.0 -0.12 4.35 4.15 2.5 3.1 -0.2 Overcharge Release Voltage Overdischarge Detection Voltage

VCL

V V V V A A VDL VDR VCHA

Overdischarge Release Voltage Charger Detection Voltage Detection Current Overdischarge Current1 Detection Load Short-Circuiting Detection

Current Consumption Current Consumption in Normal Operation

Current Consumption in power Down

VM Internal Resistance Internal Resistance between VM and VDD

Internal Resistance between VM and GND FET on Resistance Equivalent FET on Resistance Over Temperature Protection Over Temperature Protection IIOV1

2.1 10

3 20 3.9 30

ISHORT VDD=3.5V IOPE IPDN

VDD=3.5V VM =0V VDD=2.0V

VM pin floating VDD=3.5V VM=1.0V VDD=2.0V VM=1.0V

VDD=3.6V IVM =1.0A

2.8 0.1 6

μA μA

RVMD RVMS

320

k? k?

100

54 RDS(ON)63 m?

TSHD+

120 100

Over Temperature Recovery Degree TSHD-

oC

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Detection Delay Time Overcharge Voltage Detection Delay Time

Overdischarge Voltage Detection Delay Time

Overdischarge Current DetectionDelay Time Load Short-Circuiting Detection Delay Time

tCU tDL tIOV tSHORT

VDD=3.5V VDD=3.5V 130 200 mS

40 60 mS mS

180 300 uS

15

20

Figure 3. Functional Block Diagram

FUNCTIONAL DESCRIPTION

The XB5353 monitors the voltage and current of a battery and protects it from being damaged due to overcharge voltage, overdischarge voltage, overdischarge current, and short circuit conditions by disconnecting the battery from the load or charger. These functions are required in order to operate the battery cell within specified limits.

The device requires only one external capacitor. The MOSFET is integrated and its RDS(ON) is as low as 54m? typical.

Normal operating mode

If no exception condition is detected, charging and discharging can be carried out freely. This condition is called the normal operating mode. Overcharge Condition

When the battery voltage becomes higher than the overcharge detection voltage (VCU) during charging under normal condition and the state continues for the overcharge detection delay time (tCU) or longer, the XB5353 turns the charging control FET off

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