BQ2057CSN - TI

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

Part No

BQ2057CSN
Manufacturer

TI
ChipWorker Part#

CW5897738
Category

Battery Management IC
Package

SOIC-8
Description

Battery Charge Management Low Dropout Linear 1-cell Li-Ion Charge Controller with AutoCompTM, 4.2V Linear Charge Management Li-Ion/Li-Pol 2000mA 4.2V 8Pin SOIC Tube
Documentation

Datasheet

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BQ2057CSN Specifications

Attribute	Attribute Value

Part Number	BQ2057CSN
Manufacturer	TI
ChipWorker Part#	CW5897738
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	4.2 V
Output Current	2 A
Number of Channels	1 Channel
Number of Positions	8 Position
Power Dissipation	300 mW
Output Voltage (Max)	4.242 V
Operating Temperature (Max)	70 ℃
Operating Temperature (Min)	-20 ℃
Power Dissipation (Max)	300 mW
Supply Voltage	4.5 V
Supply Voltage (Min)	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 BQ2057CSN is a Lithium-ion (Li-ion) and Lithium-polymer (Li-pol) linear charge-management Integrated Circuit which is designed for compact portable electronics. The BQ2057 continuously measures battery temperature using an external thermistor. For safety, the charge controller inhibits charge until the battery temperature is within user-defined thresholds. The charge controller 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 charge controller precharges 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 charge controller applies a constant current to the battery. An external sense-resistor sets the current.
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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