TDF8546_SDS_15 datasheet(2/21 Pages) PHILIPS

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TDF8546_SDS

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Product short data sheet

Rev. 8 — 27 September 2013

2 of 21

NXP Semiconductors

TDF8546

I2C-bus controlled 4

 45 W best efficiency amplifier

 Line driver mode supports engine start at a battery voltage as low as 6 V (16 dB and

mid-tap voltage 0.25

V

 Programmable clip detect: 2 %, 5 % or 10 %

 Programmable thermal pre-warning

 Pin STB can be programmed/multiplexed with second-clip detect

 Clip information of each channel can be directed separately to pin DIAG or pin STB

 Independent enabling of thermal-, clip- or load fault information (short across the load

or to VP or to ground) on pin DIAG

 Loss-of-ground and open VP safe (minimum series resistance required)

 All amplifier outputs short-circuit proof to ground, supply voltage and across the load

(channel independent)

 All pins short-circuit proof to ground

 Temperature controlled gain reduction to prevent audio holes at high junction

temperatures

 Programmable low battery voltage detection to enable 7.5 V or 6 V minimum battery

voltage operation

 Overvoltage protection (load-dump safe up to VP = 50 V) with overvoltage pre-warning

at 16 V

 Offset detection

Quick reference data

Table 1.

Quick reference data

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VP(oper)

operating supply

voltage

RL = 4 

614.4

quiescent current

no load

260

350

no load; VP = 7 V

190

output power

RL =4 ; VP = 14.4 V; maximum power;

Vi = 2 V RMS square wave

RL =4 ; VP = 15.2 V; maximum power;

Vi = 2 V RMS square wave

RL =4 ; VP = 14.4 V; THD = 0.5 %

RL =4 ; VP = 14.4 V; THD = 10 %

RL =2 ; VP = 14.4 V; THD = 10 %

RL =2 ; VP = 14.4 V; maximum power;

Vi = 2 V RMS square wave

THD

total harmonic

distortion

Po = 1 W to 12 W; fi = 1 kHz; RL =4 ; BTL mode

0.01

0.1

Po =4W; fi = 1 kHz; RL =4 ; best efficiency mode

0.03

Vn(o)

output noise voltage

filter 20 Hz to 22 kHz; RS =1 k

amplifier mode

V

line driver mode

V

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