厂商：Freescale
类别：16位单片机
类别：Qorivva微控制器
厂商：Linear
类别：可编程增益放大器
厂商：Panasonic
类别：PhotoMOS(MOSFET输出光电耦合器)
厂商：AKM
类别：2-Way Radio
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特点Charges Single-Cell Li-Ion Battery from Wall Adapter and USB InputsAutomatic Input Power Detection and SelectionCharge Current Programmable Up to 950mA from Wall Adapter InputAdjustable Output, High Ef?ciency 600mA Synchronous DC/DC ConverterNo External MOSFET, Sense Resistor or Blocking Diode NeededThermal Regulation Maximizes Charge Rate Without Risk of OverheatingPreset Charge Voltage with ±0.6% AccuracyProgrammable Charge Current Termination1.5MHz Constant Frequency Operation (Step-Down Converter)18μA USB Suspend Current in Shutdown“Power Present” Status OutputCharge Status OutputAutomatic RechargeAvailable in a Thermally Enhanced, Low Pro?le (0.75mm) 16-Lead (5mm × 3mm) DFN Package典型应用典型应用描述Internal thermal feedback regulates the battery charge current to maintain a constant die temperature during high power operation or high ambient temperature conditions. The ?oat voltage is ?xed at 4.2V and the charge currents are programmed with external resistors. The LTC3550 terminates the charge cycle when the charge current drops below the programmed termination threshold after the ?nal ?oat voltage is reached. With power applied to both inputs, the LTC3550 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 DC/DC converter switching frequency is internally set at 1.5MHz, allowing the use of small surface mount inductors and capacitors.