Philips TDA8559T - Manual (Page 25)

TDA8559_3 © Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Product data sheets Rev. 03 — 15 May 2006 25 of 36
Philips Semiconductors
TDA8559T
Low-voltage stereo headphone amplifier
(1) R
L
= 25
Ω
.
(2) R
L
= 32
Ω
.
f = 1 kHz.
(1) V
P
= 3 V, R
L
= 25
Ω
.
(2) V
P
= 5 V, R
L
= 25
Ω
.
Fig 26. Total worst case power dissipation as a
function of supply voltage (SE) (stereo
headphone)
Fig 27. THD as a function of P
o
(BTL mono)
0 4
V P (V)
P
(W)
8 12
1.5
0.5
0
1
mda099
(2) (1)
10 2
10
1
P
o
(W)
THD
(%)
10
− 1
10
− 2
mda130
10
− 3 10
− 2 10
− 1 1
(2) (1)
(1) V
P
= 3 V, R
L
= 25 Ω , THD = 70 mW.
(2) V
P
= 5 V, R
L
= 25 Ω , THD = 150 mW.
V
P
= 3 V, R
s
= 0 Ω , V
r
= 0.2 V (RMS).
Fig 28. THD as a function of frequency (BTL mono) Fig 29. SVRR as a function of frequency (BTL mono)
1
THD
(%)
f (Hz)
10
− 1
10
− 2
mda131
10 10 2 10 3 10 4 10 5
(2)
(1)
− 80
− 60
− 40
− 20
0
mda132
10
f (Hz)
SVRR
(dB)
10 2 10 3 10 4 10 5