NXP 公司的TDF8599B是采用SOI BCDMOS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-bus controlled dual channel 43 W/4 W, single channel 85 W/1 W class-D power amplifier with load diagnostics
The 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 smaller 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 depending on the value of the external resistor connected to pins 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-efficiency
Low quiescent current
Operating voltage from 8 V to 24 V
Two 4ohm/2ohm capable BTL channels or one 1 ohm capable BTL channel
Differential inputs
I2C-bus mode with 15 I2C-bus addresses or non-I2C-bus mode operation
Clip detect
Independent short circuit protection for each channel
Advanced short circuit protection for load, GND and supply
Load dump protection
Thermal foldback and thermal protection
DC offset protection
Selectable AD or BD modulation
Parallel channel mode for high current drive capability
Advanced clocking:
Switchable oscillator clock source: internal for Master mode or external for Slave mode
Spread spectrum mode
Phase staggering
Frequency hopping
No ‘pop noise’ caused by DC output offset voltage
I2C-bus mode:
DC load detection
AC load detection
Thermal pre-warning diagnostic level setting
Identification of activated protections or warnings
Selectable diagnostic information available using pins DIAG and CLIP
Qualified in accordance with AEC-Q100

TDF8599B应用:
Car audio


图1.TDF8599B方框图


图2.TDF8599B非I2C总线模式的双BTL应用电路图

图3.TDF8599B I2C总线模式双BTL应用电路图

图4.TDF8599B I2C总线模式单BTL应用电路图

图5.TDF8599B I2C总线模式主从(双BTL主和单BTL从)应用电路图