NXP公司的TDA5051A是用于ASK传输的调制解调器,数据速率600波特或1200波特,单电源5V工作,和EN50065-1兼容,主要用在家用电器控制如空调,照明,告警等,能量/热量控制以及采用家庭动力线网络的ASK数据传输.本文介绍了TDA5051A主要特性和优势,方框图,动力线绝缘和不绝缘的应用电路,以及光主从控制板主要特性,方框图和电路图.
The TDA5051A is a modem IC, specifically dedicated to ASK transmission by means of the home power supply network, at 600 baud or 1200 baud data rate. It operates from a single 5 V supply.

TDA5051A主要特性和优势:
Full digital carrier generation and shaping
Modulation/demodulation frequency set by clock adjustment, from microcontroller or on-chip oscillator
High clock rate of 6-bit D/A (Digital to Analog) converter for rejection of aliasing components
Fully integrated output power stage with overload protection
Automatic Gain Control (AGC) at receiver input
8-bit A/D (Analog to Digital) converter and narrow digital filtering
Digital demodulation delivering baseband data
Easy compliance with EN50065-1 with simple coupling network
Few external components for low cost applications
SO16 plastic package

TDA5051A应用:
Home appliance control (air conditioning, shutters, lighting, alarms and so on)
Energy/heating control
Amplitude Shift Keying (ASK) data transmission using the home power network

图1.TDA5051A方框图

图2.动力线不绝缘的TDA5051A应用电路,提高灵敏度(典型68 BμV)
 
图3.动力线绝缘的TDA5051A应用电路,提高灵敏度(典型68 BμV)

TDA5051A 光主从控制板
The TDA5051A lighting control demo consists of a master controller and a slave lighting controller. The master controller uses the High-Bay board, which consists of the LPC1114 microcontroller, the TDA5051A PLM IC, and power management circuitry. An AC-DC converter is used to provide +13 V DC supply voltage. The master employs 4 xPCF8883 capacitive proximity switches to provide On/Off, Dim Up, Dim Down, and Select outputs of the remote lighting slave controller. The slave controller consists of the High-Bay board, an AC-DC converter to provide +13 V supply voltage, and an LED array. Both the master and the slave are housed in a plastic box with 110 V AC power cords.
The TDA5051A lighting demo board is designed to let customers evaluate the TDA5051A in a realistic application. The demo board includes a the TDA5051A, an LPC1114 microcontroller, a PCA9632 I2C-bus to PWM converter, and software containing some pre-defined functions to brighten and dim the four available LED outputs from the PCA9632. The parameters used by these functions can be easily changed by changing a configuration header file with parameter values used by the pre-defined functions. To further customize the application, the driver functions used in the demo firmware can be easily modified.


图4.TDA5051A 光主从控制板外形图:上图:主控制板;下图:从控制板

图5.主控制板框图

图6.从控制板框图

图7.连接AC线和开关到主控制板

图8.连接AC线和LED到从控制板

图9.TDA5051A光控制板电路图

图10.4xPCF8883容性接近传感器开关电路图