BQ2057SN - TI

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

BQ2057SN
Manufacturer

TI
ChipWorker Part#

CW36247533
Category

Battery Management IC
Package

SOIC-8
Description

Battery Charge Management Low Dropout Linear 1-cell Li-Ion Charge Controller with AutoCompTM, 4.1V Linear Charge Management Li-Ion/Li-Pol 2000mA 4.1V 8Pin SOIC Tube
Documentation

Datasheet

BQ2057SN Global Supplier

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BQ2057SN Specifications

Attribute	Attribute Value

Part Number	BQ2057SN
Manufacturer	TI
ChipWorker Part#	CW36247533
Category	Battery Management IC
Documentation	Datasheet
Mounting Style	Surface Mount
Number of Pins	8 Pin
Case/Package	SOIC-8
Supply Voltage (DC)	15.0V (max)
Input Voltage (DC)	15.0 V
Output Voltage	4.1 V
Output Current	0.04 A
Number of Positions	8 Position
Power Dissipation	300 mW
Operating Temperature (Max)	70 ℃
Operating Temperature (Min)	-20 ℃
Power Dissipation (Max)	300 mW
Supply Voltage	4.5 V
Input Voltage	15 V
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Size-Length	4.9 mm
Size-Width	3.91 mm
Size-Height	1.58 mm
Operating Temperature	-20℃ ~ 70℃
Product Lifecycle Status	Active
Packaging	Tube
RoHS	RoHS Compliant
Lead-Free Status	Lead Free
REACH SVHC Compliance	No SVHC
REACH SVHC Compliance Edition	2015/06/15
ECCN Code	EAR99

Product Description

The BQ2057SN is an advance linear charge management Integrated Circuit for single and two cell lithium ion and lithium polymer. This IC combines high-accuracy current and voltage regulation, battery conditioning, temperature monitoring, charge termination, charge-status indication and AutoComp charge-rate. The BQ2057 continuously measures battery temperature using an external thermistor. For safety, the IC inhibits charge until the battery temperature is within user-defined thresholds. The IC then charges the battery in three phases conditioning, constant current and constant voltage. If the battery voltage is below the low-voltage threshold V(min), the IC pre-charges using a low current to condition the battery. The conditioning charge rate is approximately 10% of the regulation current. The conditioning current also minimizes heat dissipation in the external pass-element during the initial stage of the charge. After conditioning, the IC applies a constant current to the battery.
Requires small number of external components
Better than ±1% voltage regulation accuracy with pre-set voltages
AutoComp™ Dynamic compensation of battery pack"s internal impedance to reduce charge time
Optional cell-temperature monitoring before and during charge
Integrated voltage and current regulation with programmable charge-current
Integrated cell conditioning for reviving deeply discharged cells
Charge status output for single or dual led or host processor interface
Automatic battery-recharge feature
Charge termination by minimum current
Automatic low-power sleep mode when VCC is removed
EVMs Available for quick evaluation
Green product and no Sb/Br

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