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PDF TDA8587J Data sheet ( Hoja de datos )
| Número de pieza | TDA8587J | |
| Descripción | 4 x 25 W BTL power amplifier | |
| Fabricantes | NXP Semiconductors | |
| Logotipo |  |
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TDA8587J
www.DataSheet4U.com
4 × 25 W BTL power amplifier and multiple voltage regulator
with power switch
Rev. 01 — 23 December 2004
Preliminary data sheet
1. General description
The TDA8587J is a combination of a quad Bridge-Tied Load (BTL) power amplifier, a
multiple voltage regulator and a power switch. Several protections and diagnostic options
(e.g. DIAG, WARN) are incorporated in this design.
This device is primarily developed to cover the complete power supply and audio amplifier
requirements in low and mid-end car radio applications.
The switchable regulators (regulators 1, 3 and 4) are intended to be used as supplies for
the tuner, logic, digital or analog sound processor and CD / tape control.
The standby regulator (regulator 2) is specially designed as supply for a microcontroller. In
combination with the reset delay capacitor (pin RDC) and the reset output (pin RST), a
proper start-up sequence for the microcontroller is guaranteed. The storage capacitor
(pin STC) makes this regulator output insensitive for short battery drops (e.g. engine
start).
The power switch (pin PSW) can be used for switching e.g. an electrically powered
antenna, display unit or CD / tape driver.
The smart combination of two dynamic buffers and four amplifier output stages makes it
possible to create a full quad BTL amplifier, using only six output pins.
2. Features
2.1 General
s Protected against ElectroStatic Discharge (ESD)
s Thermal (foldback) protection to prevent overheating
s Load dump/overvoltage protection
s Single mode control pin (standby, operating: mute/on)
s Low standby current (only regulator 2 active)
s Hysteresis on internal switching levels
s Low power dissipation in any short-circuit condition
s Package with flexible leads (easy manual assembly)
s DBS27 package with low thermal resistance
1 page  
Philips Semiconductors
TDA8587J
www.DataSheet4U.com
4 × 25 W BTL power amplifier and regulator
11
IN1A
VP1
7
VP
VP2
21
VP
LOAD DUMP
LOW BATTERY
18
MODE
CONTROL
INTERFACE
standby
mute
high power
low power
TEMPERATURE
SHORT-CIRCUIT
12
IN1B
VP
VP
1×
16
IN2A
TDA8587J
VP
V
I
VP
AMPLIFIER
3
OUT1A
VP
COMMON
VP
V
I
VP VP
BUFFER
2 OUT1
VP
AMPLIFIER
5 OUT1B
VP
V
I
DIAGNOSTIC
VP
AMPLIFIER
24
DIAG
25
OUT2A
14
VREF
15
IN2B
substrate
1 27
PGND1 PGND2
VP
COMMON
VP
V
I
VP VP
BUFFER
26
OUT2
VP
AMPLIFIER
23 OUT2B
001aab560
Fig 2. Block diagram (amplifier part)
9397 750 13504
Preliminary data sheet
Rev. 01 — 23 December 2004
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
5 of 30
5 Page 
Philips Semiconductors
TDA8587J
www.DataSheet4U.com
4 × 25 W BTL power amplifier and regulator
7.11 Diagnostic output
The output of the diagnostic pin (DIAG) is open-collector and therefore must have an
external pull-up resistor (e.g. to regulator 3). This pin is active HIGH.
The diagnostic output will be activated during the following conditions:
• Clip detection: when the amplifier is AC operating (low or high power), the diagnostic
output will indicate when clipping occurs at one or more outputs; this information can
be used to drive a sound processor to attenuate the input signal and so limit the level
of distortion
• Short-circuit diagnosis: the diagnostic output will indicate when one or more amplifier
outputs have a short-circuit to ground, supply lines or across the speaker
• Thermal foldback pre-warning: before the thermal foldback starts to affect the
amplifier output signal, the diagnostic pin will give a pre-warning.
9397 750 13504
Preliminary data sheet
Rev. 01 — 23 December 2004
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
11 of 30
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| PDF Descargar | [ Datasheet TDA8587J.PDF ] | |
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