NXP 公司的TDF8599A是具有負載診斷功能的2x135W或1x250W D類音頻放大器,包括了采用SOI BCDMOS技術的NDMOST-NDMOST輸出級. TDF8599A具有低功耗高效率,和標準的AB類放大器相比,可以采用更小型的散熱器. TDF8599A可以工作在非I2C總線模式或I2C總線模式.工作電壓從8V到35V,主要用在汽車音響.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總線模式的雙BTL模式, I2C總線模式的雙BTL模式, I2C總線模式的單BTL模式和2C總線模式的雙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
圖1.TDF8599A方框圖
圖2.TDF8599A應用案例:非I2C總線模式的雙BTL模式
圖3.TDF8599A應用案例:I2C總線模式的雙BTL模式
圖4.TDF8599A應用案例:I2C總線模式的單BTL模式
圖5.TDF8599A應用案例:I2C總線模式的雙BTL主,單BTL從模式
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