2001 Apr 24
2
Philips Semiconductors
Objective specification
2
×
40 W/2
Ω
stereo BTL car radio power amplifier
with differential inputs and diagnostic outputs
TDA8566TH
FEATURES
•
Differential inputs
•
Very high Common Mode Rejection Ratio (CMRR)
•
High common mode input signal handling
•
Requires very few external components
•
High output power
•
4 and 2
Ω
load driving capability
•
Low offset voltage at output
•
Fixed gain
•
Diagnostic facility (distortion, short-circuit and
temperature pre-warning)
•
Good ripple rejection
•
Mode select switch (operating, mute and standby)
•
Load dump protection
•
Short-circuit proof to ground, to V
P
and across the load
•
Low power dissipation in any short-circuit condition
•
Thermally protected
•
Reverse polarity safe
•
Protected against electrostatic discharge
•
No switch-on/switch-off plops
•
Low thermal resistance.
GENERAL DESCRIPTION
The TDA8566TH is an integrated class-B output amplifier
contained in a 20-lead small outline plastic package. The
device contains 2 amplifiers in a Bridge-Tied Load (BTL)
configuration. The output power is 2
×
25 W in a 4
Ω
load
or 2
×
40 W in a 2
Ω
load. It has a differential input stage
and 2 diagnostic outputs. The device is primarily
developed for car radio applications.
QUICK REFERENCE DATA
ORDERING INFORMATION
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
V
P
operating supply voltage
6
14.4
18
V
I
ORM
repetitive peak output current
−
−
7.5
A
I
q(tot)
total quiescent current
−
115
−
mA
I
stb
standby current
−
0.1
10
µ
A
I
sw
switch-on current
−
−
40
µ
A
Z
i
input impedance
100
120
−
k
Ω
P
out
output power
R
L
= 4
Ω
; THD = 10%
−
25
−
W
R
L
= 2
Ω
; THD = 10%
−
40
−
W
SVRR
supply voltage ripple rejection
R
s
= 0
Ω
−
60
−
dB
α
cs
channel separation
R
s
= 10 k
Ω
−
50
−
dB
CMRR
common mode rejection ratio
−
75
−
dB
G
v
closed loop voltage gain
25
26
27
dB
V
n(o)
noise output voltage
R
s
= 0
Ω
−
−
120
µ
V
TYPE
NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
TDA8566TH
HSOP20
plastic, heatsink small outline package; 20 leads; low stand-off height
SOT418-2
