Philips TDA8586Q-N1-S421 Datasheet

DATA SH EET

Preliminary specification
Supersedes data of 1998 May 25
File under Integrated Circuits, IC01

1999 Apr 08

INTEGRATED CIRCUITS

TDA8586

Power amplifier with load detection
and auto BTL/SE selection

1999 Apr 08 2

Philips Semiconductors Preliminary specification

Power amplifier with load detection and
auto BTL/SE selection

TDA8586

FEATURES
General

• Operating voltage from 8 to 18 V

• Low distortion

• Few external components, fixed gain

• Automatic mode selection (SE or BTL) depending on

connected ‘rear’ loads

• Can be used as a stereo amplifier in Bridge-Tied Load
(BTL) or quad Single-Ended (SE) amplifiers

• Single-ended mode without loudspeaker capacitor

• Soft clipping, to guarantee good clip behaviour with

inductive loads

• Mute and standby mode with one-pin operation

• Diagnostic information for Dynamic Distortion Detector

(DDD), high temperature (140 °C) mode of operation
and short-circuit

• No switch-on/off plops when switching between standby
and mute and from mute to on

• Load detection on ‘rear’ channels when switching from
standby to mute

• Fast mute on supply voltage drops (low V

P

mute).

Protection

• Short-circuit proof to ground, positive supply voltage on
all pins and across load

• ESD protected on all pins

• Thermal protection against temperatures exceeding
150 °C

• Load dump protection

• Overvoltage protection.

GENERAL DESCRIPTION

The IC incorporates the following functions:

1. 4 × 6 W SE amplifies without SE capacitor, because of
the availability of 2 half supply voltage power buffers

2. 2 × 20 W BTL amplifiers

3. Automatic switching between 2 and 4 speaker
operation. The mode of operation is determined during
start-up.

This amplifier is protected for all general short-circuit
conditions to battery or ground, overvoltage, 45 V load
dump and short-circuits on the speaker outputs.

The IC is contained in a 20-pin power HSOP package, but
is also available in a 17-pin SIL power package. When
packaged in the 20-pin HSOP package additional
functions are available:

1. DDD level selection between 2 and 10%

2. Overrule pin for changing mode of operation
(from SE to BTL or from BTL to SE).

ORDERING INFORMATION

TYPE

NUMBER

PACKAGE

NAME DESCRIPTION VERSION

TDA8586Q DBS17P plastic DIL-bent-SIL power package; 17 leads (lead length 12 mm) SOT243-1
TDA8586TH HSOP20 heatsink small outline package; 20 leads; low stand-off SOT418-2

1999 Apr 08 3

Philips Semiconductors Preliminary specification

Power amplifier with load detection and
auto BTL/SE selection

TDA8586

QUICK REFERENCE DATA

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

V

P

operating supply voltage 8.0 − 18 V

I

q(tot)

total quiescent current VP= 14.4 V, SE mode − 140 170 mA

I

stb

standby supply current VP= 14.4 V − 1 100 µA

G

v

voltage gain SE mode 25 26 27 dB

BTL mode 31 32 33 dB

Bridge-tied load application

P

o

output power VP= 14.4 V; RL=4Ω

THD = 0.5% 14 15 − W
THD = 10% 17 21 − W

THD total harmonic distortion f

i

= 1 kHz; Po=1W;

VP= 14.4 V; RL=4Ω

− 0.05 0.15 %

V

OO

DC output offset voltage VP= 14.4 V; RL=4Ω;

mute condition

− 10 20 mV

V

P

= 14.4 V; on condition − 0 100 mV

V

n(o)

noise output voltage Rs=1kΩ; VP= 14.4 V − 100 200 µV

Single-ended application

P

o

output power VP= 14.4 V; RL=4Ω

THD = 0.5% 4 4.5 − W
THD = 10% 5 6 − W

THD total harmonic distortion f

i

= 1 kHz; Po=1W;

VP= 14.4 V; RL=4Ω

− 0.08 0.15 %

V

OO

DC output offset voltage VP= 14.4 V; RL=4Ω;

mute condition

− 10 20 mV

V

P

= 14.4 V; on condition − 0 100 mV

V

n(o)

noise output voltage Rs=1kΩ; VP= 14.4 V − 80 150 µV

1999 Apr 08 4

Philips Semiconductors Preliminary specification

Power amplifier with load detection and
auto BTL/SE selection

TDA8586

BLOCK DIAGRAM

Fig.1 Block diagram SOT243-1.

handbook, full pagewidth

MGR023

1

OUT1

ACREF

11

IN3

7

IN2

6

IN1

5

IN4

8

MSO

13

V/I

+

−

OA

+

−

4

OUT2

OA

+

−

OA

+

−

3

HVP1

V

Pn

V

Pn

60
kΩ

V/I

+

−

60
kΩ

V/I

+

−

60
kΩ

17

OUT3

V/I

+

−

OA

+

−

14

OUT4

12

DIAG

OA

+

−

OA

+

−

15

HVP2

60
kΩ

V/I

+

−

60
kΩ

BUFFER

V

Pn

30 kΩ

V/I

+

−

60
kΩ

INTERFACE DIAGNOSTIC

10

PGND2

V

P1

2

V

P2

16

9

PGND1

TDA8586Q

1999 Apr 08 5

Philips Semiconductors Preliminary specification

Power amplifier with load detection and
auto BTL/SE selection

TDA8586

Fig.2 Block diagram SOT418-2 (HSOP20 heatsink up).

handbook, full pagewidth

MGR024

17

OUT1

ACREF

6

IN3

4

IN2

3

IN1

2

IN4

5

MSO

8

n.c.

1

V/I

+

−

OA

+

−

20

OUT2

OA

+

−

OA

+

−

19

HVP1

V

Pn

V

Pn

60
kΩ

V/I

+

−

60
kΩ

V/I

+

−

60
kΩ

14

OUT3

V/I

+

−

OA

+

−

11

OUT4

7

DIAG

OA

+

−

OA

+

−

12

HVP2

60
kΩ

V/I

+

−

60
kΩ

BUFFER

V

Pn

30 kΩ

V/I

+

−

60
kΩ

INTERFACE DIAGNOSTIC

10

DDDSEL9OVERRULE

15

PGND2

V

P1

18

V

P2

13

16

PGND1

TDA8586TH

1999 Apr 08 6

Philips Semiconductors Preliminary specification

Power amplifier with load detection and
auto BTL/SE selection

TDA8586

PINNING

SYMBOL

PIN

SOT243

PIN

SOT418

DESCRIPTION

n.c. − 1 not connected
IN1 5 2 non-inverting input 1
IN2 6 3 inverting input 2
IN3 7 4 non inverting input 3
IN4 8 5 inverting input 4
ACREF 11 6 common signal input
DIAG 12 7 diagnostic output/mode fix
MSO 13 8 mode select mute, standby or on
OVERRULE − 9 mode selection overrule
DDDSEL − 10 2 or 10% dynamic distortion detection
OUT4 14 11 SE output 4 (negative)
HVP2 15 12 buffer output/BTL output 2 (negative)
V

P2

16 13 supply voltage 2
OUT3 17 14 SE output 3/BTL output 2 (positive)
PGND2 10 15 power ground 2
PGND1 9 16 power ground 1
OUT1 1 17 SE output 1/BTL output 1 (positive)
V

P1

2 18 supply voltage 1
HVP1 3 19 buffer output/BTL output 1 (negative)
OUT2 4 20 SE output 2 (negative)

1999 Apr 08 7

Philips Semiconductors Preliminary specification

Power amplifier with load detection and
auto BTL/SE selection

TDA8586

Fig.3 Pin configuration (SOT243-1).

handbook, halfpage

TDA8586Q

MGR025

OUT1

V

P1

HVP1
OUT2

IN1
IN2
IN3

IN4
PGND1
PGND2
ACREF

DIAG

MSO
OUT4
HVP2

V

P2

OUT3

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17

Fig.4 Pin configuration (SOT418-2).

handbook, halfpage

n.c.
IN1
IN2
IN3
IN4

ACREF

DIAG

MSO

OVERRULE

DDDSEL

OUT2
HVP1
V

P1

OUT1

PGND2
OUT3

PGND1

V

P2

HVP2
OUT4

1
2
3
4
5
6
7
8
9

10

11

12

20
19
18
17
16
15
14
13

TDA8586TH

MGR026

1999 Apr 08 8

Philips Semiconductors Preliminary specification

Power amplifier with load detection and
auto BTL/SE selection

TDA8586

FUNCTIONAL DESCRIPTION

The TDA8586 is a multi-purpose power amplifier with four
amplifiers and 2 buffer stages, which can be connected in
the following configurations with high output power and
low distortion:

• Dual Bridge-Tied Load (BTL) amplifiers

• Quad Single-Ended (SE) amplifiers.

In the BTL mode of operation, the 2 buffer amplifiers act as
inverting amplifiers to complete the bridge across the
‘front’ amplifiers (OUT1 and OUT3) and the ‘rear’ outputs
(OUT2 and OUT4) enter a high-impedance state.

In the SE mode of operation, the buffers act as an AC
ground path thereby eliminating the need for series
capacitors on the speaker outputs.

Diagnostics:

• While the IC is in the mute mode, the diagnostic output
will signal the mode of operation when the IC is not
overruled

• In the on mode the diagnostic output will signal any fault
in the IC or if the output of any amplifier is clipping with
a distortion of 10% (or 2% depending on selected
clip-mode).

Special attention is given to the dynamic behaviour as
follows:

• Noise suppression during engine start

• No plops when switching from standby to on

• Slow offset change between mute and on (controlled by

MSO pin)

• Low noise levels, which are independent of the supply
voltage.

Protections are included to avoid the IC being damaged at:

• Over temperature: T

j

> 150 °C

• Short-circuit of the output pin(s) to ground or supply rail.
When short-circuited, the power dissipation is limited

• ESD protection (Human Body Model 3000 V and
Machine Model 300 V).

The presence of the load is measured after the transition
between standby and mute. The IC will determine if there
is an acceptable load on both outputs (OUT2 and OUT4).
If both outputs are unloaded, the IC will switch to a
2 speaker mode of operation (BTL mode), unless it is
overruled.

There are two options to overrule:

1. Before transition from mute to on, after a load
detection, pulling the diagnostic output above 9.5 V
will force the IC into 4 speaker mode

2. TDA8586TH: pulling the OVERRULE pin according
pinning table.

Care should be taken with the OVERRULE function as it
works during the on mode. If there is a 2 or 4 speaker
mode change during the on mode a large ‘plop’ can be
heard on the speakers.

The ACREF input (common signal input) acts with the four
signal inputs (IN1 to IN4) to provide quasi differential
inputs. A capacitor must be connected to this pin of which
the ground pin should be connected to the ground at the
signal source (usually the ground at the audio signal
processor). This capacitor has a dual function. During the
speaker detection, the signal ground capacitor is used to
set the time constant of the measurement (and thus
determines the minimum required switch-on time).
The capacitor on the MSO pin allows the integrate function
to provide immunity to outside noises during load
detection.