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Product Detailed Parameters
- Description：IC BATT CHG LI-ION 1CELL 8TSSOP
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR)
- Battery Chemistry：Lithium Ion/Polymer
- Voltage - Supply (Max)：15V
- Operating Temperature：-20°C ~ 70°C (TA)
- Mounting Type：Surface Mount
- Package / Case：8-TSSOP (0.173", 4.40mm Width)
- Supplier Device Package：8-TSSOP
- Number of Cells：1
- Current - Charging：Constant - Programmable
- Programmable Features：Current
- Fault Protection：-
- Charge Current - Max：-
- Battery Pack Voltage：4.2V
- Interface：-
- Grade：-
- Qualification：-
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Overview
The BQ2057CTSTRG4 is a low-dropout linear charge management integrated circuit designed for single and two-cell lithium-ion and lithium-polymer battery packs. It operates with an input supply voltage range of 4.5 V to 15 V and delivers a programmable constant current up to 2 A. The device features an output voltage of 4.2 V per cell, supporting up to 8.4 V for two cells. It utilizes an 8-TSSOP surface-mount package and functions within a temperature range of -20°C to +70°C.
Feature Summary
- Integrates AutoComp technology to compensate for system voltage drops during charging
- Provides fully automatic charge termination based on battery pack conditions
- Supports configurable charge current and termination thresholds via external components
Applications
- Single-cell lithium-ion battery charger systems
- Two-cell lithium-ion battery pack management
- Lithium-polymer battery charging applications
- Portable electronic devices requiring linear charge management
Procurement Notes
Verify the specific suffix 'G4' indicates lead-free compliance and RoHS3 status as documented by Texas Instruments. Confirm that the TSSOP-8 package matches the required footprint for PCB layout. Ensure the operating temperature range aligns with the target application environment specifications before finalizing procurement orders.
Selection Notes
Select this component when a linear charge solution is preferred over switching regulators for reduced electromagnetic interference. The BQ2057 series is suitable for applications where simplicity and low noise are prioritized over high efficiency at high currents. Verify that the available input voltage range accommodates the source power supply variations in the design.
Part Context
This part belongs to the BQ2057C family of advanced linear charge management ICs from Texas Instruments. The family includes variants for single and dual-cell configurations, such as the BQ2057SN and BQ2057TTSG4. These devices share common architectural features including AutoComp functionality and linear regulation topology for reliable battery charging.
Replacement Considerations
Public confirmed substitute part numbers include BQ2057CTSTRG4 for tape-and-reel packaging equivalents. Cross-reference pinouts and thermal characteristics when replacing with other BQ2057 variants to ensure compatibility.
