恩智浦TDF8599B43W汽车音频D类放大方案

1、恩智浦TDF8599B43W汽车音频D类放大方案    恩智浦半导体（NXP）公司的TDF8599B是采用SOIBCDMOS技术的双BTL汽车音频D类放大器,包括有NDMOST-NDMOST输出级,采用I2C总线控制,工作电压从8V到24V,高效率和低静态电流,具有双4欧姆/2欧姆的BTL通路或单个1欧姆BTL通路,差分输入.本文介绍了TDF8599B的主要特性,方框图以及I2C总线和非I2C总线模式的双BTL应用电路图,I2C总线模式单BTL应用电路图和I2C总线模式主从应用电路图.TDF8599B:I2C-buscontrolleddualchann

2、el43W/4W,singlechannel恩智浦半导体（NXP） 公司的TDF8599B是采用SOIBCDMOS技术的双BTL汽车音频D类放大器,包括有NDMOST-NDMOST 输出级,采用I2C总线控制,工作电压从8V到24V,高效率和低静态电流,具有双4欧姆/2欧姆的BTL通路或单个1欧姆BTL通路,差分输入.本文介绍了TDF8599B的主要特性,方框图以及I2C总线和非I2C总线模式的双BTL应用电路图, I2C总线模式单BTL应用电路图和I2C总线模式主从应用电路图.TDF8599B:I2C-buscontrolled dual channel 43 W/4 W, single c

3、hannel 85 W/1 W class-D power amplifier with loaddiagnosticsThe TDF8599B is a dual Bridge-Tied Load (BTL) car audio amplifier comprising an NDMOST-NDMOST output stage based on SOI BCDMOS technology. Low power dissipation enables the TDF8599B high-efficiency, class-D amplifier to be used with a small

4、er heat sink than those normally used with standard class-AB amplifiers.The TDF8599B can operate in either non-I2C-bus mode or I2C-bus mode. When in I2C-bus mode, DC load detection results and fault conditions can be easily read back from the device. Up to 15 I2C-bus addresses can be selected depend

5、ing on the value of the external resistor connected topins ADS and MOD.When pin ADS is short circuited to ground, the TDF8599B operates in non-I2C-bus mode.Switching between Operating mode and Mute mode in non-I2C-bus mode is only possible using pins EN and SEL_MUTE.TDF8599B 主要特性:High-efficiencyLow

6、quiescent currentOperating voltage from 8 V to 24 VTwo 4ohm/2ohm capable BTL channels or one 1 ohm capable BTL channelDifferential inputsI2C-bus mode with 15 I2C-bus addresses or non-I2C-bus mode operationClip detectIndependent short circuit protection for each channelAdvanced short circuit protecti

7、on for load, GND and supplyLoad dump protectionThermal foldback and thermal protectionDC offset protectionSelectable AD or BD modulationParallel channel mode for high current drive capabilityAdvanced clocking:Switchable oscillator clock source: internal for Master mode or external for Slave modeSpre

8、ad spectrum modePhase staggeringFrequency hoppingNo pop noise caused by DC output offset voltageI2C-bus mode:DC load detectionAC load detectionThermal pre-warning diagnostic level settingIdentification of activated protections or warningsSelectable diagnostic information available using pins DIAG and CLIPQualified in accordance with AEC-Q100TDF8599B应用:Car audio图1.TDF8599B方框图图2.TDF8599B非I2C总线模