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PDF TDA3683 Data sheet ( Hoja de datos )
| Número de pieza | TDA3683 | |
| Descripción | Multiple voltage regulator | |
| Fabricantes | NXP Semiconductors | |
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TDA3683
Multiple voltage regulator with switch and ignition buffer
Rev. 02 — 7 October 2005
Product data sheet
1. General description
• The TDA3683 is a multiple output voltage regulator with a power switch and an
ignition buffer. Several protections and diagnostic options are incorporated in this
design.
• The TDA3683 is primarily developed to cover the complete power supply
requirements in car radio applications.
• The standby regulators (regulators 1, 2 and 3) are especially designed to supply
digital circuitry that has to be permanently connected e.g. Controller Area Network
(CAN) bus, Digital Signal Processor (DSP) core and the microcontroller. In
combination with the reset delay capacitor (pin RDC1 or pin RDC2/3) and the reset
function (pin RST1 or pin RST2/3), a proper start-up sequence for a microcontroller is
guaranteed. The storage capacitor (pin STC) makes the standby regulator outputs
insensitive for short battery drops (e.g. during engine start-up).
• The switched regulators (regulators 4, 5, 6 and 7) are intended to be used as supply
for the tuner, logic, sound processor and CD / tape control.
• The power switch (pin PSW) can be used for switching the electrically powered
antenna, display unit and CD / tape drives.
• The ignition buffer is intended to produce a clean logic output signal when a polluted
ignition key signal is used as input.
2. Features
s Three enable pin controlled standby regulators:
x REG1: 5 V / 600 mA controlled by the EN1 input
x REG2: 3.3 V / 200 mA controlled by the EN2/3 input
x REG3: 1.9 V / 150 mA controlled by the EN2/3 input
s Four mode pin controlled switched regulators:
x REG4: 8.5 V / 350 mA
x REG5: 5 V / 1.8 A
x REG6: 3.3 V / 1.2 A
x REG7: 2.4 V to 10 V / 2 A adjustable using external resistor divider
s One mode pin controlled power switch; 2.2 A continuous and 3 A surge, with delayed
lower current limit so as to be less sensitive to inrush currents
s One independent ignition buffer (inverted output, open-collector) with good input
protection against high transients
s A storage capacitor is included to provide back-up supply for the standby regulators in
the event of loss of battery supply
1 page  
Philips Semiconductors
6. Pinning information
6.1 Pinning
TDA3683
Multiple voltage regulator with switch and ignition buffer
Fig 2. Pin configuration
VP1 1
IGNIN 2
PSW 3
IGNOUT 4
HOLD 5
MODE 6
REG5 7
RST2/3 8
VP2 9
RDC2/3 10
REG6 11
REG3 12
REG2 13
STC 14
REG1 15
RST1 16
REG4 17
RDC1 18
EN1 19
EN2/3 20
REG7 21
ADJ7 22
GND 23
TDA3683J
TDA3683SD
001aaa683
6.2 Pin description
Table 3:
Symbol
VP1
IGNIN
PSW
IGNOUT
HOLD
MODE
REG5
RST2/3
VP2
RDC2/3
REG6
REG3
Pin description
Pin
1
2
3
4
5
6
7
8
9
10
11
12
Description
supply voltage 1
ignition input
power switch output
ignition output
hold output
enable input for regulators 4, 5, 6, 7 and power switch
regulator 5 output
reset output for regulators 2 and 3
supply voltage 2 (for regulators 5 and 6)
reset delay capacitor for regulators 2 and 3
regulator 6 output
regulator 3 output
TDA3683_2
Product data sheet
Rev. 02 — 7 October 2005
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
5 of 31
5 Page 
Philips Semiconductors
TDA3683
Multiple voltage regulator with switch and ignition buffer
7.9 Ignition buffer
The ignition buffer (pins IGNIN and IGNOUT) is an independent inverting open-collector
output buffer circuit that can be used to sense the start line of the ignition key in a car. The
start line will only be pulled-up to the battery voltage in the event of an engine crank
resulting in a LOW at the inverting output of the ignition buffer. This output signal can be
used to immediately mute an audio amplifier during the engine crank.
To guarantee a reliable LOW output signal, even in extreme cold weather crank conditions
(the battery voltage may momentarily drop down to 3 V) a low supply latch function is
implemented.
To make the ignition buffer input robust, for possible extreme transients present on the
battery line, an input RC filter is strongly advised. A blocking diode is also recommended
to prevent substrate injection in case of negative voltage spikes at the input.
7.10 Supply voltage inputs
The supply voltage inputs (pins VP1 and VP2) are intended to be connected to the battery.
Both inputs are protected against load dump transients and reverse battery connections.
The second supply pin (VP2) is internally connected to the high current/ low output voltage
switched regulators (REG5 and REG6) and can be connected to an external DC-to-DC
downconverter for reduced power dissipation and increased power supply efficiency.
Power must be applied to pin VP1 to ensure that the circuits are functional, since the band
gaps for the switched and standby regulators are connected to this supply pin.
Rising and falling supply voltage threshold levels determine if the switched regulators and
power switch can be switched on.
The timing diagrams for various regulator functions are illustrated in Figure 4 and
Figure 5.
TDA3683_2
Product data sheet
Rev. 02 — 7 October 2005
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
11 of 31
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| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet TDA3683.PDF ] | |
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