TDA3602 datasheet(2/26 Pages) PHILIPS

2 / 26 page

July 1994

Philips Semiconductors

Product speciﬁcation

Multiple output voltage regulator

TDA3602

FEATURES

• Two VP state controlled regulators (REG1 and REG2)

• Regulator 3 operates during load dump or thermal

shutdown

• Multi-function control pin

• A back-up circuit for Regulator 3 via a single capacitor

• Supply voltage of −6 V to 50 V (a voltage of −3 V on VP

does not discharge capacitor Cbu)

• Low reverse current Regulator 3

• Low quiescent current in coma mode

• HOLD output

• RESET output (LOW at load dump)

• High ripple rejection.

PROTECTIONS

• Foldback current limit protection (Regulators 1 and 2)

• Load dump protection

• Thermal protection

• DC short-circuit safe to ground and VP of all regulator

outputs

• Reverse polarity safe of pin 1 (VP). No high currents are

flowing which can damage the IC

• Capable of handling high energy on the regulator

outputs.

GENERAL DESCRIPTION

The TDA3602 is a multiple output voltage regulator,

intended for use in car radios with or without a

microprocessor. It contains two fixed voltage regulators

with foldback current protection (Regulators 1 and 2), and

one fixed voltage regulator that also operates during load

dump and thermal shutdown. This regulator can be used

to supply a microprocessor.

A back-up circuit supplies Regulator 3 during a short

period after the power is cut off (negative field decay or

engine start procedure). A state control pin (pin 4) controls

the device, which can be switched through four stages

using the information at this pin. The switching levels at

this pin contain hysteresis.

RESET and HOLD outputs can be used to interface with a

microprocessor. The RESET signal can be used to call up

or initialize a microprocessor (power-on reset). The HOLD

signal can be used to control the power stages (mute

signal in a low end application), or to generate a HOLD

interrupt (microprocessor application).

An internal Zener diode on the back-up pin allows this pin

to withstand a load dump when supplied by the pin using a

100

Ω series resistor.

The supply pin can withstand load dump pulses and

negative supply voltages.

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