ZHCSG63C December 2013 – July 2018
PRODUCTION DATA.
- 1 特性
- 2 應(yīng)用
- 3 說明
- 4 修訂歷史記錄
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
- 7 Specifications
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3
Feature Description
- 8.3.1 Details of a Qi Wireless Power System and bq51003 Power Transfer Flow Diagrams
- 8.3.2 Dynamic Rectifier Control
- 8.3.3 Dynamic Efficiency Scaling
- 8.3.4 RILIM Calculations
- 8.3.5 Input Overvoltage
- 8.3.6 Adapter Enable Functionality and EN1/EN2 Control
- 8.3.7 End Power Transfer Packet (WPC Header 0x02)
- 8.3.8 Status Outputs
- 8.3.9 WPC Communication Scheme
- 8.3.10 Communication Modulator
- 8.3.11 Adaptive Communication Limit
- 8.3.12 Synchronous Rectification
- 8.3.13 Temperature Sense Resistor Network (TS)
- 8.3.14 3-State Driver Recommendations for the TS-CTRL Pin
- 8.3.15 Thermal Protection
- 8.3.16 WPC v1.2 Compliance – Foreign Object Detection
- 8.4 Device Functional Modes
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12器件和文檔支持
- 13機械、封裝和可訂購信息
封裝選項
機械數(shù)據(jù) (封裝 | 引腳)
- YFP|28
散熱焊盤機械數(shù)據(jù) (封裝 | 引腳)
訂購信息
8.1.1 A Brief Description of the Wireless System
A wireless system consists of a charging pad (transmitter or primary) and the secondary-side equipment (receiver or secondary). There is a coil in the charging pad and in the secondary equipment which are magnetically coupled to each other when the secondary is placed on the primary. Power is then transferred from the transmitter to the receiver through coupled inductors (for example, an air-core transformer). Controlling the amount of power transferred is achieved by sending feedback (error signal) communication to the primary (that is, to increase or decrease power).
The receiver communicates with the transmitter by changing the load seen by the transmitter. This load variation results in a change in the transmitter coil current, which is measured and interpreted by a processor in the charging pad. Communication is done through digital-packets which are transferred from the receiver to the transmitter. Differential Biphase encoding is used for the packets. The bit rate is 2-kbps.
Various types of communication packets have been defined. These include identification and authentication packets, error packets, control packets, end power packets, and power usage packets.
The transmitter coil stays powered off most of the time. It occasionally wakes up to see if a receiver is present. When a receiver authenticates itself to the transmitter, the transmiter will remain powered on. The receiver maintains full control over the power transfer using communication packets.
