Richtek RT1650

Description

The RT1650 is a wireless power receiver compliant with WPC V1.1 standard. The RT1650 integrates a synchronous full-bridge rectifier, a low dropout regulator, and a Micro Controller Unit (MCU) for control and communication. The device receives AC power from a WPC compatible wireless transmitter and provides output power up to 7.5W, which could be used as a power supply for a charger of mobile or consumer devices.The MCU-based controller can support bi-direction channel communication including Frequency Shift Keying (FSK) demodulation for power signal from the transmitter and Amplitude Shift Keying (ASK) modulation for power signal to the transmitter. The RT1650 provides Foreign Object Detection (FOD) function to meet the requirement after WPC V1.1. It communicates with the transmitter for the received power to determine if a foreign object is present within the magnetic interface. This provides a higher level of safety.The RT1650 provides a programmable dynamic rectifier voltage control function to improve power efficiency, a programmable power management control for maximum power delivery, a programmable current limit for suitable load setting, a programmable temperature setting with external NTC for thermoregulation, and proper protection functions such as UVLO, OVP, and OTP.

Features

• Single-Chip WPC V1.1 Compliant Receiver
• Integrated Synchronous Rectifier Switch
• Support Output Power up to 7.5W
• High Rectifier Efficiency up to 96%
• High System Efficiency up to 80%
• Programmable Loading for Synchronous Rectifier Operation
• -Programmable Dynamic Rectifier Voltage Control for Optimized Transient Response and Power Efficiency
• High Accurate Received Power Calculation for FOD Function
• 10-bit ADC for Voltage/Current Measurement
• Coil Power Loss Modeling for Optimized Compensation
• Adaptive Power Offset Compensation
• Low Quiescent Embedded 32-bit ARM Cortex-M0 MCU
• 32KB ROM/OTP, 1KB SRAM and 272B MTP
• Easy Tuning for Communication and Control Parameters
• Support Bi-direction Channel Communication
• FSK Demodulation for Power Signal from Wireless Power Transmitter
• ASK Modulation for Power Signal to Wireless Power Transmitter
• Programmable Temperature Control
• Programmable Charge Status Packet
• Support Alignment with Transmitter
• Support Enable, Charge Complete and Fault Control Inputs
• Receiver Controlled EPT Packet
• Over Current Limit
• Over Voltage Protection
• Thermal Shutdown
• CSP 3.0mm x 3.4mm 48B (Pitch = 0.4mm)
• Low Profile (0.5mm Max.)

Typical applications

• Digital Cameras
• Cell Phones & Smart Phones
• Wireless Power Embedded Batteries
• Portable Media Players
• Hand-held Devices
• Power Banks
• WPC Compliant Receivers
• Headsets