TDA3609 Просмотр технического описания (PDF) - Philips Electronics

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TDA3609

Multiple voltage regulator with switch and ignition buffers

Philips Electronics 

Philips Semiconductors

Multiple voltage regulator with switch and

ignition buffers

Preliminary specification

TDA3609JR

The power switch can also be controlled by means of a

separate enable input (pin 11).

All output pins are fully protected. The regulators are

protected against load dump (regulator 1 and 3 will switch

off at supply voltages >18 V) and short-circuit (foldback

current protection).

The switch contains a current protection, but this

protection is delayed at short-circuit condition for at least

10 ms. During this time the output current is limited to a

peak value of at least 3 A and 2 A continuous (VP ≤ 18 V).

At supply voltages >17 V the switch is clamped at

maximum 16 V (to avoid external connected circuitry being

damaged by an overvoltage) and the switch will switch off

at load dump.

By means of two independent ignition Schmitt triggers and

ignition output buffers (one open collector and one

push-pull output), interfacing with the microcontroller can

be accomplished (simple full/semi on/off logic

applications). The ignition 1 output is inverted.

The total timing diagrams are shown in Figs 3 and 4.

handbook, full pagewidth

VP

7.0 V

4.5 V

≤50 V

ignition 1 ≥3.25 V

input

≤1.1 V

≥−100 V

ignition 1 5.0 V

output

VP

ignition 2

input

≤50 V

≥2.2 V

≤2.0 V

≥−100 V

ignition 2 5.0 V

output

load dump

Enable Schmitt trigger ignition 1

load dump

Enable Schmitt trigger ignition 2

Fig.3 Timing diagram ignition Schmitt triggers.

MGK611

1997 Aug 15

6

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