TDA3683J
Rev. 01 — 13 December 2004
www.DataSheet4U.com
Multiple voltage regulator with switch and ignition buffer
Pre...
TDA3683J
Rev. 01 — 13 December 2004
www.DataSheet4U.com
Multiple voltage
regulator with switch and ignition buffer
Preliminary data sheet
1. General description
The TDA3683J 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 TDA3683J 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. CAN bus, DPS core and the microcontroller. In combination with the reset delay capacitor (RDC1 or RDC2/3) and the reset function (RST1 or RST2/3), a proper start-up sequence for a microcontroller is guaranteed. The storage capacitor (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 (PSW) can be used for switching the electrically powered antenna,
display unit and CD / tape drives
The ignition buffer (IGN) 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 in...