The NU2119 is a 98.0% efficient, 8-A battery charging solution using a switched cap architecture. This architecture and the integrated FETs are optimized to enable a 50% duty cycle, allowing the cable current to be half the current delivered to the battery, reducing the losses over the charging cable as well as limiting the temperature rise in the application. The dual-phase architecture reduces the input cap requirements as well as reducing the output voltage ripple.
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• 98.0% Efficient at 2:1 charge mode, 99.1% Efficient at 1:1 charge mode
• Switched Cap Architecture Optimized for 50% Duty Cycle
ü Input Voltage is 2x Battery Voltage (3.5 V to 4.65v)
üOutput Current is 2x of Input Current (Up to 8 A)
üReduces Power Loss Across the Cable
• Support charge pump 2:1 and 1:1 charge mode
• Integrated Programmable Protection Features for Safe Operation
üInput Over-Voltage Protection (BUS_OVP)
üInput Over-Current Protection (BUS_OCP)
üInput Over-Voltage with External OVP FET
üBattery Over-Voltage Protection (BAT_OVP)
üOutput Over-Voltage (VOUT_OVP)
üIBAT Over-Current Protection (BAT_OCP)
• Programmable Settings for System Optimization
üIBUSREG, VBATERG and IBATERG Regulation integrated
üSTAT, FLAG, and MASK options for Interrupts
üADC Readings and Configuration
• Integrated 15-Bit Analog-to-Digital Converter (ADC)
ü±1% BUS Voltage
ü-4.5%~5% BUS current at 2.5A (0℃ to 85℃)
ü±1% VOUT Voltage
ü±0.25% BAT voltage with Differential Sensing
ü-4% ~3.5% BAT Current at 6 A with External RSENSE =2mΩ(0℃ to 85℃)
ü±4℃ Die Temperature