Weltrend | Products

Wireless power controllers

WT7071

The WT7071 is a highly integrated wireless power transmitter controller that supports Wireless Power Consortium (WPC) v1.2.4 EPP specifications and Qualcomm^® Quick Charge ™ 3.0 technology. It is designed for wireless power charging pad applications.The WT7071 minimizes external components by integrating the circuits of voltage regulators, Quick Charge 3.0 protocol interface, ASK demodulation, FSK modulation, foreign object detection (FOD), PWM, ADC, MOSFET drivers, current sense amplifier, and an 8-bit MCU to allow small form factor and low BOM cost. Wide operation voltage range (4.25V to 21V) and a Multiple-Time-Programmable (MTP) non-volatile memory provide high reliability and allow flexible user configuration requirements.

Features

- WPC v1.2.4 compliant, supports EPP 15W, such as MP-A2 & MP-A11, coil configurations
- Embedded 1T 8051 CPU
- Multiple-Time-Programmable (MTP) nonvolatile memory: 16K Bytes
- SRAM: 256+512 Bytes
- 20 MHz internal high frequency RC Oscillator
- 30 kHz internal low frequency RC Oscillator
- FSK modulation
- Voltage and current ASK demodulation
- Foreign Object Detection (FOD)
- NMOS pre-driver
- Current source for external temperature sensing and protection (OTP)
- Low-side current sensing with amplifier
- Over Current Protection (OCP)
- Over/Under Voltage Protections (OVP/UVP)
- Programmable 12-bit high speed and 8-bit low speed PWMs
- 9 channels ADC inputs
- Programmable LED patterns
- Programmable buzzer patterns
- VCC operating voltage: 4.25V to 21V
- Package type: 40-pin QFN
- Recommended operation temperature: -20°C to +105°C

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