tda3683 NXP Semiconductors, tda3683 Datasheet
tda3683
Manufacturer Part Number
tda3683
Description
Tda3683 Multiple Voltage Regulator With Switch And Ignition Buffer
Manufacturer
NXP Semiconductors
Datasheet
1.TDA3683.pdf
(31 pages)
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1. General description
2. Features
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TDA3683
Multiple voltage regulator with switch and ignition buffer
Rev. 02 — 7 October 2005
Three enable pin controlled standby regulators:
Four mode pin controlled switched regulators:
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
One independent ignition buffer (inverted output, open-collector) with good input
protection against high transients
A storage capacitor is included to provide back-up supply for the standby regulators in
the event of loss of battery supply
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.
REG1: 5 V / 600 mA controlled by the EN1 input
REG2: 3.3 V / 200 mA controlled by the EN2/3 input
REG3: 1.9 V / 150 mA controlled by the EN2/3 input
REG4: 8.5 V / 350 mA
REG5: 5 V / 1.8 A
REG6: 3.3 V / 1.2 A
REG7: 2.4 V to 10 V / 2 A adjustable using external resistor divider
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