LTC3550-1 - LTC3550-1是Dual Input USB/AC Adapter Li-Ion Battery Charger with 600mA Buck Converter

LTC3550-1是LINEAR凌力尔特公司的一款电池充电器和 DC-DC产品，LTC3550-1是LTC3550-1是Dual Input USB/AC Adapter Li-Ion Battery Charger with 600mA Buck Converter，本站介绍了LTC3550-1的封装应用图解、特点和优点、功能等，并给出了与LTC3550-1相关的LINEAR元器件型号供参考。

LTC3550-1 - LTC3550-1是Dual Input USB/AC Adapter Li-Ion Battery Charger with 600mA Buck Converter - 电池充电器和 DC-DC - 电源管理 - 凌力尔特

LTC3550-1 - Dual Input USB/AC Adapter Li-Ion Battery Charger with 600mA Buck Converter

LTC3550-1 - Dual Input USB/AC Adapter Li-Ion Battery Charger with 600mA Buck Converter - Linear Technology（凌力尔特）

功能描述

The LTC3550-1 is a standalone linear charger with a 600mA monolithic synchronous buck converter. It is capable of charging a single-cell Li-Ion battery from both wall adapter and USB inputs. The charger automatically selects the appropriate power source for charging.

Internal thermal feedback regulates the battery charge current to maintain a constant die temperature during high power operation or high ambient temperature conditions. The ﬂoat voltage is ﬁxed at 4.2V and the charge currents are programmed with external resistors. The LTC3550-1 terminates the charge cycle when the charge current drops below the programmed termination threshold after the ﬁnal ﬂoat voltage is reached. With power applied to both inputs, the LTC3550-1 can be put into shutdown mode reducing the DCIN supply current to 20μA, the USBIN supply current to 10μA, and the battery drain current to less than 2μA.

The synchronous buck converter generates a ﬁxed output voltage of 1.875V. The switching frequency is internally set at 1.5MHz, allowing the use of small surface mount inductors and capacitors.

特点

Charges Single-Cell Li-Ion Batteries from Wall Adapter and USB Inputs

Automatic Input Power Detection and Selection

Charge Current Programmable Up to 950mA from Wall Adapter Input

High Efﬁciency 600mA Synchronous DC/DC Converter

No External MOSFET, Sense Resistor or Blocking Diode Needed

Thermal Regulation Maximizes Charge Rate Without Risk of Overheating*

Preset Charge Voltage with ±0.6% Accuracy

Programmable Charge Current Termination

1.5MHz Constant Frequency Operation (Step-Down Converter)

18μA USB Suspend Current in Shutdown

Independent “Power Present” Status Outputs