NU17121 - Complete Power Management ICs & Solutions: The Optimal Choice for High Efficiency & High Integration

Products Wireless Charger Wireless Charging Transmitter NU17121

NU17121

Wireless Charging Transmitter

NU17121

NU17121 is high efficiency, high integration Qi2 compliant transmitter IC for wireless charging. NU17121 integrate low Rdson Full bridge FETs and gate driver, 32bit 36MHz MCU core, 8KB SRAM and 128KB Flash, and fast charging block TCPC/PD/BC1.2/QC/FCP/ SCP. NU17121 integrate all critical functions of power system, such us low- EMI FET drivers, Bootstrap circuits for external resonant capacitor switches, 4.8V/3.3V/1.5V LDO and 5V Buck converter power supply, high-accuracy current measurement. Controllable slew rate/ dead time of gate driver and PWM frequency dither function can further reduce the EMI of power system. NU17121 support FSK communication, multi channels ASK demodulation, Q factor detection and power loss based foreign object detection. I2C and UART interface are used to communicate with other devices. NU17121 also include under voltage lockout UVLO, over voltage protection OVP, over current protection OCP and thermal shutdown

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Key Spec

Features

• Support WPC Qi2 wireless charging

• Input voltage range: 3V to 23V(NU1712X)

• Integrated 32bit 36MHz MCU core, 8KB SRAM, Up to 128KB Flash

• 144MHz clock for 2 pairs of precise phase shift PWM control with dither function

• 36MHz clock for 4 Basic PWMs

• Dedicated high-speed 4MHz ADC for magnitude-phase demodulation

• Up to 10 channels low-speed 1MHz ADC

• Integrated high-efficiency full-bridge FETs and driver optimized for low EMI

• Integrated two channel high-side drives to drive external FETs for switched capacitor

• High-accuracy input current measurement for FOD and In-band communication

• Integrated multi-channels demodulation including magnitude, phase, voltage, average current demodulation

• Integrated 4.8V&3.3V&1.5V LDO, integrated 5.0V Buck

• Robust UVLO / OVP / OCP and thermal shut down protection

• Up to 5 enhanced captures

• Up to 4 timers

• Support 2 x I2C interface: one I2C master and one I2C slave

• Support 2 x UART interface

• Up to 2 pairs of CC

• Up to 3 pairs of D+/D- interface

• Support Type-C DRP and PD 3.1 with PPS

• Support BC1.2, UFCS, QC 3.0, FCP/SCP, AFC charging sink protocols

• 4.5mmx3.5mm 35 pin QFN Package or 5mmx5mm 47pin QFN Package

Applications

• Qi2 wireless transmitter

• 3 in 1 wireless transmitter

Datasheet Download

NU17121

2025 / 08 / 22

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