BQ2057TSN Texas Instruments In Stock
The BQ2057TSN is a electronic component from Texas Instruments, available for purchase on FindMyChip with competitive pricing and worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- —
- Lifecycle
- —
- Datasheet
- N/A
- Price
- From $1.3800(MOQ 10)
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Specifications
| Charge Voltage | 4.1 / 4.2V |
| Max Charge Current | 1A |
| Input Voltage | 4.5 to 10V |
| Operating Temperature | -40 to 85C |
| Package | SOIC-8 |
| Safety Timer | 4hr |
| Chemistry | Li-Ion / Li-Polymer |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for BQ2057TSN:
Single-cell Li-Ion linear charger, SOT-23-5 package, 4.2V, up to 500mA. Smaller package, lower max current than BQ2057TSN.
TI next-gen single-cell Li-Ion charger with USB input support and enhanced safety features, upgrade path from BQ2057TSN.
Frequently Asked Questions
BQ2057TSN 的最大充电电流是多少，如何设置？
BQ2057TSN 最大充电电流可达 1A，通过外接编程电阻（ISET 引脚）精确设定。典型应用中，选择合适阻值可将充电电流设置在 100mA 至 1000mA 之间，满足不同电池容量需求。
BQ2057TSN 支持哪些封装，适用于什么场景？
BQ2057TSN 采用 SOIC-8 封装，体积小巧，适合空间受限的便携式产品，如蓝牙耳机、智能手表、手持仪器等需要单节锂电池充电管理的设计。
BQ2057TSN 的充电截止电压是多少，如何选择 4.1V 和 4.2V？
BQ2057TSN 通过 VSET 引脚电平选择充电截止电压：接 GND 为 4.1V（适用于部分老式锂电池），接 VCC 为 4.2V（现代锂电池标准）。需根据电池规格书选择，避免过充损坏电池。
BQ2057TSN 有哪些主要替代型号？
常见替代型号包括 MCP73831（Microchip，SOT-23-5，功能类似，适合超小型设计）和 TP4056（国产常用方案，SOIC-8，4.2V 固定充电电压）。选型时需核对充电电压、电流范围及安全保护特性是否满足需求。
BQ2057TSN 是否有安全保护机制？
是的，BQ2057TSN 内置安全定时器（4 小时超时保护），可在充电异常时自动终止充电，防止因电池故障或电路异常导致过热风险。此外具备过温保护和输入电压检测功能，符合 RoHS 无铅标准。
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Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 10+ | $1.6100 | $16.10 |
| 25+ | $1.5400 | $38.50 |
| 75+ | $1.3800 | $103.50 |
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