LTC3552 - LTC3552是Standalone Linear Li-Ion Battery Charger and Dual Synchronous Buck Converter

LTC3552是LINEAR凌力尔特公司的一款电池充电器和 DC-DC产品，LTC3552是LTC3552是Standalone Linear Li-Ion Battery Charger and Dual Synchronous Buck Converter，本站介绍了LTC3552的封装应用图解、特点和优点、功能等，并给出了与LTC3552相关的LINEAR元器件型号供参考。

LTC3552 - LTC3552是Standalone Linear Li-Ion Battery Charger and Dual Synchronous Buck Converter - 电池充电器和 DC-DC - 电源管理 - 凌力尔特

LTC3552 - Standalone Linear Li-Ion Battery Charger and Dual Synchronous Buck Converter

LTC3552 - Standalone Linear Li-Ion Battery Charger and Dual Synchronous Buck Converter - Linear Technology（凌力尔特）

功能描述

The LTC3552 is a complete constant-current/constantvoltage linear charger with a dual DC/DC converter for single cell lithium-ion batteries. Its DFN package and low external component count make the LTC3552 ideally suited for portable applications. Furthermore, the LTC3552 is designed to work within USB power speci? cations.

No external sense resistor or external blocking diode is required due to the internal MOSFET architecture. The charge voltage is ?xed at 4.2V and the charge current is programmed with a resistor. The charge cycle terminates when the charge current drops below the programmed termination threshold after the ?nal ?oat voltage is reached. When the input supply (wall adapter or USB supply) is removed, the LTC3552 enters a low current state dropping the battery drain current to less than 2µA. Thermal regulation maximizes charge rate without risk of overheating.

The synchronous step-down switching regulators generate adjustable output voltages from 5V down to 0.6V. The switching frequency is set at 2.25MHz, allowing the use of small surface mount inductors and capacitors.

Vout LTC3552 Adjustable (0.6V to 5V) LTC3552-1 1.8V & 1.575V

特点

高达 950mA 的可设置充电电流

完整的线性充电器和双信道 DC/DC 稳压器

0.6V 至 5V 的降压型转换器输出电压

无需 MOSFET、检测电阻器或隔断二极管

热调整功能可在无过热危险的情况下实现充电速率的最大化*

直接从一个 USB 端口进行充电

可设置充电电流终止

准确度达 ±1% 的 4.2V 预设充电电压

用于电池电量测量的充电电流监视器输出*

自动再充电