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- BQ2057C - TI
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Manufacturer:TI
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ManyChip's Part#:MC550510583
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RoHS:Lead free / RoHS Compliant
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Datasheet:Datasheet 3D Model
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Description:Li-Ion Low-Dropout Linear (4.2V) Charge Management IC For One-Cell Applications With AutoCompTMw
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Stock Locations:
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Availability:0 pcs In Stock
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MOQ:1 pcs
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Unit Price:$ 0
Updated at 17/06/2025 10:30:15(UTC+8)
Certifications
ManyChip is committed to product quality and safety with ISO 9001, ISO 13485, ISO 45001, UL, RoHS, CQC and REACH certifications.
Description
- The BENCHMARQ bq2057 series advanced Lithium-Ion (Li-Ion) and Lithium-Polymer (Li-Pol) linear charge-management ICs are designed for cost-sensitive and compact portable electronics. They combine high-accuracy current and voltage regulation, battery conditioning, temperature monitoring, charge termination, charge-status indication, and AutoComp charge-rate compensation in a single 8-pin IC. MSOP, TSSOP, and SOIC package options are offered to fit a wide range of end applications.
- The bq2057 continuously measures battery temperature using an external thermistor. For safety, the bq2057 inhibits charge until the battery temperature is within user-defined thresholds. The bq2057 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 bq2057 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 bq2057 applies a constant current to the battery. An external sense-resistor sets the current. The sense-resistor can be on either the high or low side of the battery without additional components. The constant-current phase continues until the battery reaches the charge-regulation voltage.
- The bq2057 then begins the constant-voltage phase. The accuracy of the voltage regulation is better than ±1% over the operating-temperature and supply-voltage ranges. For single and dual cells, the bq2057 is offered in four fixed-voltage versions: 4.1 V, 4.2 V, 8.2 V, and 8.4 V. Charge stops when the current tapers to the charge termination threshold, I(TERM). The bq2057 automatically restarts the charge if the battery voltage falls below the V(RCH) threshold.
- The designer also may use the AutoComp feature to reduce charging time. This proprietary technique allows safe and dynamic compensation for the internal impedance of the battery pack during charge.
- Ideal for Single (4.1 V or 4.2 V) and Dual-Cell (8.2 V or 8.4 V) Li-Ion or Li-Pol Packs
- Requires Small Number of External Components
- 0.3 V Dropout Voltage for Minimizing Heat Dissipation
- Better Than ±1% Voltage Regulation Accuracy With Preset Voltages
- AutoComp Dynamic Compensation of Battery Packs Internal Impedance to Reduce Charge Time
- Optional Cell-Temperature Monitoring Before and During Charge
- Integrated Voltage and Current Regulation With Programmable Charge-Current and High-or Low-Side Current Sensing
- Integrated Cell Conditioning for Reviving Deeply Discharged Cells and Minimizing Heat Dissipation During Initial Stage Of Charge
- 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
- Packaging: 8-Pin SOIC, 8-Pin TSSOP, 8-Pin MSOP
- AutoComp is a trademark of Texas Instruments.
BQ2057C Specifications
| Attribute | Attribute Value |
|---|---|
| Datasheet | Datasheet |
| 3D Model | 3D Model |
| Show | |
| RoHS | RoHS Compliant |
| Lead-Free Status | Lead Free |
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- - Carefully inspected and packed by ManyChip warehouse - Vacuum packaging - Anti-static packaging - Shockproof foam
- The terms here are for reference only, the actual terms are subject to the sales quotation. - Please confirm product specifications when ordering. - MOQ refers to the minimum order quantity required to purchase each part. - If you have special ordering instructions, please indicate them on the ordering page. - Inspection (PSI) will be performed prior to shipment.
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