TDF8591TH datasheet(14/34 Pages) NXP

14 / 34 page

TDF8591TH_1

Product data sheet

Rev. 01 — 5 March 2008

14 of 34

NXP Semiconductors

TDF8591TH

× 100 W SE (4 Ω) or 1 × 310 W BTL (4 Ω) class-D ampliﬁer

10.2 Dynamic characteristics (BTL)

[1]

Rs(L) is the series resistance of inductor of low-pass LC ﬁlter in the application.

[2]

Output power is measured indirectly; based on RDSon measurement (see Section 12.2).

[3]

THD is measured in a bandwidth of 22 Hz to 20 kHz, AES brick wall. Maximum limit is guaranteed but may not be 100 % tested.

[4]

Vripple = Vripple(max) = 2 V (peak-to-peak value); RS = 0 Ω.

[5]

B = 22 Hz to 20 kHz, AES brick wall (see Section 12.4).

[6]

B = 22 Hz to 20 kHz, AES brick wall, independent on RS (see Section 12.4).

Table 9.

Dynamic characteristics (BTL)

VP = ±27 V; RL = 8 Ω; fi = 1 kHz; fosc = 310 kHz; Rs(L) < 0.1 Ω [1]; Tamb = −40 °C to +85 °C; Tj = −40 °C to +150 °C; unless

otherwise speciﬁed. See Section 12.7 for the BTL application schematics. The 2nd order demodulation ﬁlter coil is referred to

as L and the capacitor as C.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

output power

L = 10

µH,C=1 µF; T

j =85 °C; RL =4 Ω;

VP = ±18 V; THD = 0.5 %

[2] -

110

L=10

µH;C=1 µF; Tj =85 °C; RL =4 Ω;

VP = ±18 V; THD = 10 %

[2] -

139

L = 22

µH; C = 680 nF; Tj = 85 °C;

RL =4 Ω; VP = ±27 V; THD = 0.5 %

[2] -

250

L = 22

µH; C = 680 nF; Tj = 85 °C;

RL =4 Ω; VP = ±27 V; THD = 10 %

[2] -

310

IOM

peak output current

current limiting, see Section 6.4.3

--A

THD

total harmonic distortion

Po = 1 W; fi = 1 kHz

[3] -

0.02

0.2

Po = 1 W; fi = 10 kHz

[3] -

0.15

Gv(cl)

closed-loop voltage gain

SVRR

supply voltage ripple

rejection

operating; fripple = 100 Hz

[4] -68

operating; fripple = 1 kHz

[4] 50

mute; fripple = 1 kHz

[4] -68

standby; fripple = 100 Hz

[4] -80

|Zi(dif)|

differential input

impedance

measured between the input pins INxP

and INxM

Ω

Vn(o)

noise output voltage

operating; VP = ±27 V; RS = 0 Ω

[5] -

240

µV

operating; VP = ±18 V; RS = 0 Ω

[5] -

200

µV

mute; VP = ±27 V

[6] -

180

µV

mute; VP = ±18 V

[6] -

125

µV

αmute

mute attenuation

fi = 1 kHz; Vi = 1 V (RMS value)

CMRR

common mode rejection

ratio

fi(CM) = 1 kHz; Vi(CM) = 1 V (RMS value)

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