NXP 公司的TDF8599A是具有負載診斷功能的2x135W或1x250W D類(lèi)音頻放大器,包括了采用SOI BCDMOS技術(shù)的NDMOST-NDMOST輸出級. TDF8599A具有低功耗高效率,和標準的AB類(lèi)放大器相比,可以采用更小型的散熱器. TDF8599A可以工作在非I2C總線(xiàn)模式或I2C總線(xiàn)模式.工作電壓從8V到35V,主要用在汽車(chē)音響.本文介紹了TDF8599A的主要特性,方框圖以及多種應用案例,包括非I2C總線(xiàn)模式的雙BTL模式, I2C總線(xiàn)模式的雙BTL模式, I2C總線(xiàn)模式的單BTL模式和2C總線(xiàn)模式的雙BTL主,單BTL從模式.

TDF8599A:I2C-bus controlled dual channel 135 W/4 ohm , single channel 250 W/2 ohm class-D power amplifier with load diagnostics

The TDF8599A 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 TDF8599A high-efficiency, class-D amplifier to be used with a smaller heat sink than those normally used with standard class-AB amplifiers.

The TDF8599A 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 TDF8599A 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.

TDF8599A主要特性:

High-efficiency

Low quiescent current

Operating voltage from 8 V to 35 V

Two 4ohm/2ohm capable BTL channels or one 1ohm 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

TDF8599A應用:

Car audio