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2001 Jul 23 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) operation mode 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 device incorporates the following functions:
• 4 × 6 W SE amplifies without SE capacitor, because of
the availability of 2 half supply voltage power buffers
• 2 × 20 W BTL amplifiers
• 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 device 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:
• DDD level selection between 2 and 10%
• 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