Philips Semiconductors
2 × 40 W/2 Ω stereo BTL car radio power amplifier
with differential inputs and diagnostic outputs
Objective specification
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 VP 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
SYMBOL
VP
IORM
Iq(tot)
Istb
Isw
Zi
Pout
PARAMETER
operating supply voltage
repetitive peak output current
total quiescent current
standby current
switch-on current
input impedance
output power
SVRR
αcs
CMRR
Gv
Vn(o)
supply voltage ripple rejection
channel separation
common mode rejection ratio
closed loop voltage gain
noise output voltage
CONDITIONS
RL = 4 Ω; THD = 10%
RL = 2 Ω; THD = 10%
Rs = 0 Ω
Rs = 10 kΩ
Rs = 0 Ω
MIN.
6
−
−
−
−
100
−
−
−
−
−
25
−
TYP.
14.4
−
115
0.1
−
120
25
40
60
50
75
26
−
MAX.
18
7.5
−
10
40
−
−
−
−
−
−
27
120
UNIT
V
A
mA
µA
µA
kΩ
W
W
dB
dB
dB
dB
µV
ORDERING INFORMATION
TYPE
NUMBER
TDA8566TH
NAME
HSOP20
PACKAGE
DESCRIPTION
plastic, heatsink small outline package; 20 leads; low stand-off height
VERSION
SOT418-2
2001 Apr 24
2