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TDF8599

I2C-bus controlled dual channel 43 W/2Ωsingle channel 85 W/1Ω class-D power amplifier with load diagnostics

NXP Semiconductors. 

TDF8599

I2C-bus controlled dual channel 43 W/2 Ω single channel

85 W/1 Ω class-D power amplifier with load diagnostics

Rev. 01 — 13 November 2008

Product data sheet

1. General description

The TDF8599 is a dual Bridge-Tied Load (BTL) car audio amplifier comprising an

NDMOST-NDMOST output stage based on SOI BCDMOS technology. Low dissipation

enables the TDF8599 high-efficiency, class-D amplifier to be used with a smaller heat sink

than those normally used with standard class-AB amplifiers.

The TDF8599 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 five I2C-bus addresses can be selected when an external resistor is

connected to pin ADS.

When pin ADS is short circuited to ground, the TDF8599 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.

2. Features

I High-efficiency

I Low quiescent current

I Operating voltage from 8 V to 18 V

I Two 4 Ω/2 Ω capable BTL channels or one 1 Ω capable BTL channel

I Differential inputs

I Supports I2C-bus mode with five I2C-bus addresses or non-I2C-bus mode operation

I Clip detect

I Independent short circuit protection for each channel

I Advanced short circuit protection for load, GND and supply

I Load dump protection

I Thermal foldback and thermal protection

I DC offset protection

I Selectable AD or BD modulation

I Parallel channel mode for high current drive capability

I Advanced clocking:

N Switchable oscillator clock source: internal (master) or external (slave)

N Spread spectrum mode

N Phase staggering

N Frequency hopping

I No ‘pop noise’ caused by DC output offset voltage

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