TDF8599 datasheet(29/52 Pages) NXP

29 / 52 page

TDF8599_1

Product data sheet

Rev. 01 — 13 November 2008

29 of 52

NXP Semiconductors

TDF8599

Class-D power ampliﬁer with load diagnostics

SVRR voltage and ACGND input bias voltage in Mute and Operating modes

Vref

reference voltage

input ACGND pin

2.45 3

half supply reference SVRR pin

6.9

7.2

7.5

Ampliﬁer outputs; pins OUT1N, OUT1P, OUT2N and OUTP2

VO(offset)

output offset voltage

BTL; Mute mode

BTL; Operating mode

[3][5] --70

Stabilizer output; pins VSTAB1 and VSTAB2

output voltage

stabilizer output in Mute mode and

Operating mode

810

12V

Voltage protections

V(prot)

protection voltage

undervoltage; ampliﬁer is muted

6.8

7.2

overvoltage; load dump protection

is activated

26.2 27

VP that a POR occurs at

3.7

4.4

Current protection

IO(ocp)

overcurrent protection output

current

current limit

Temperature protection

Tprot

protection temperature

155

160

°C

Tact(th_fold)

thermal foldback activation

temperature

gain =

−1 dB

140

150

°C

Tj(AV)(warn1)

average junction temperature for

pre-warning 1

IB2[D3] = 0; non-I2C-bus mode

140

150

°C

Tj(AV)(warn2)

average junction temperature for

pre-warning 2

IB2[D3] = 1

120

130

°C

DC load detection levels: I2C-bus mode only[6]

Zth(load)

load detection threshold

impedance

for normal speaker; DB1[D4] = 0;

DB2[D4] = 0

--25

Ω

Zth(open)

open load detection threshold

impedance

DB1[D4] = 1; DB2[D4] = 1

350

Ω

AC load detection levels: I2C-bus mode only

Ith(o)det(load)AC

AC load detection output

threshold current

700

900

1100

Start-up/shut-down/mute timing

twake

wake-up time

on pin EN before ﬁrst I2C-bus

transmission is recognized

[4] -

500

µs

tdet(DCload)

DC load detection time

CON = 470 nF

[4] -

250

td(stb-mute)

delay time from standby to mute

measured from ampliﬁer enabling

to start of mute release (no DC

load detection); CSVR =47 µF

CON = 470 nF

140

td(mute-fgain)

mute to full gain delay time

CON = 470 nF

[5] -15

Table 19.

Static characteristics …continued

Vp = 14.4 V; fosc = 320 kHz; −40 °C < Tamb < +85 °C; unless otherwise speciﬁed.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

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