September 2013 Rev 2 1/17
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TDA7570
250W PWM high efficiency power audio amplifier
Features
Output power 2 x 70W / 1 x 250W @ THD<1%
PWM output
±30V supply voltage (Max)
Stand-by
Mute
Protections against short circuit across the load
Chip thermal protection
External temperature sensor possibility
Thermal warning pins
Adjustable clip detector pin
Description
The TDA7570 is a switchmode power audio
amplifier with differential inputs and PWM output.
The maximum output current and voltage swing
are depending by the output circuitry (power
supply, external power transistors and sensing
resistors). The device can work as a stereo
single-ended channels or a mono bridge power
amplifier.
HiQUAD64
Table 1. Device summary
Order code Package Packing
TDA7570 HiQUAD64 Tray
www.st.com
Contents TDA7570
2/17
Contents
1 Block and simplified application diagram . . . . . . . . . . . . . . . . . . . . . . . 3
2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.4 Notes on the electrical schematic shown in Figure 3 . . . . . . . . . . . . . . . . 11
3.4.1 Main characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4 Functions, pins and components description . . . . . . . . . . . . . . . . . . . 12
4.1 Components with critical placement and type: . . . . . . . . . . . . . . . . . . . . . 12
4.2 Input capacitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.3 Short circuit protection current calculation . . . . . . . . . . . . . . . . . . . . . . . . 12
4.4 External thermal protection network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.5 Gate driving network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.6 External connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5 Package informations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
TDA7570 Block and simplified application diagram
3/17
1 Block and simplified application diagram
Figure 1. Block and simplified application diagram
5V DIG
LEFT
CHANNEL
SIGNAL
PROCESSING
TERM.
CLIP
NTC
THWext
THWint
INTERFACE
CHANNEL LEFT
HSD +
PROTECTIONS
OUTPUT
LOWPASS
FILTER
OUTPUT
LOWPASS
FILTER
CHANNEL LEFT
LSD +
PROTECTIONS
RIGHT
CHANNEL
SIGNAL
PROCESSING
INTERFACE
CHANNEL RIGHT
HSD +
PROTECTIONS
CHANNEL RIGHT
LSD +
PROTECTIONS
40
SPI1
+25V
OUT LEFT
OUT RIGHT
-25V
-25V
D00AU1198
+25V
SPI2
GPL
GPLS
GNLS
GNL
SNL2
SNL1
46
45
29
30
31
36
37
38
REF
2.5V
MUTE
ST-BY
-2.5V
52
55
56
49
50
26,27,58,592557 60 61
-V
S
-V
S
+V
REFL
-V
S
+V
REFL
SGNDDGND -V
S
+V
REFL
SNR1
SNR2
GNR
GNRS
GPRS
GPR
SPR2
SPR1
-V
S
+5
+V
S
-5
54
CD
CDsel2
CDsel1
5V DIG
FEED L IN +V
S
-V
REF1
+V
S
+V
S
-L
OW
13
4212928
14
18
17
22
21
23
24
8
7
4
5
63
64
62
IN L+
IN L-
IN R+
IN R-
PGND
OSC
33
34
O0-15
I-OFCLK
6
15
5332
10

E-TDA7570

Mfr. #:
Manufacturer:
STMicroelectronics
Description:
Audio DSPs 250W PWM High Efficiency Power Amp
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

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