Описание
The MAX8814 intelligent, stand-alone constant-current, constant-voltage (CCCV), thermally regulated linear charger is designed for charging a single-cell lithium-ion (Li+) battery. The MAX8814 controls the charging sequence from the prequalification state through constant-current fast-charge and the final constant voltage charge. The IC achieves high flexibility by providing an adjustable fast-charge current through an external resistor. It also features a booting assistant circuit that distinguishes input sources and battery connection, and provides an output signal (ABO) for system booting. The device operates over the extended temperature range (-40°C to +85°C), and is available in an 8-pin thermally enhanced 2mm x 2mm TDFN package (0.8mm max height).
- Reduces External Components and Total Cost
- Integrated Current-Sensing Circuit, MOSFET PassElement, and Thermally Regulation Circuitry
- No Reverse Blocking Diode Required
- Proprietary Die Temperature Regulation Control(+115°C) Allows Maximum Charging CurrentWithout Damaging the IC
- 4.25V to 28V Input Voltage Range with Over-Voltage Protection Above +7V to Protect AgainstUnqualified or Faulty AC Adapters
- Soft-Start Limits Inrush Current
- Programmable Fast-Charge Current: 1ARMS Max
- Charge-Current Monitor for Fuel Gauging (ISET)
- Input Power-Source Detection Output (Active-Low POK) and Charge-Enable Input (Active-Low EN)
- Output for Autobooting (ABO)
- Low Dropout Voltage (300mV at 500mA)
