TLD2132-1EP datasheet(10/41 Pages) INFINEON

10 / 41 page

Datasheet

Rev. 1.10

2019-09-26

TLD2132-1EP

LITIX™ Basic+

Internal supply

This chapter describes the internal supply in its main parameters and functionality.

4.1

Description

The internal supply principle is highlighted in the concept diagram of Figure 3.

If the voltage applied at the EN/DEN pin is below VEN(th) the device enters sleep mode. In this state all internal

functions are switched off and the current consumption is reduced to IS(sleep) .

As soon as the voltage applied at the supply pin VS is above VSUV(ON) and the voltage applied at the EN/DEN pin

is above VEN(th), after the power-on reset time tPOR, the device is ready to deliver output current from the output

stage. The power on reset time tPOR has to be taken into account also in relevant application conditions, i. e.

with PWM control from VS or EN/DEN lines.

Figure 3

Internal supply

Furthermore, as soon as the voltage applied at the supply pin VS is above VSUV(ON) and the voltage applied to

the EN/DEN pin VEN is above VDEN(th), the device is ready to detect and report fault conditions via ERRN (error

network pin) as described in Chapter 6.

To program output enable and diagnosis enable via EN/DEN pin there are several possibilities, like a resistor

divider from VS to GND, a Zener diode from EN/DEN to VS and also a logic control pin (e.g. from a

microcontroller output).

OUTx

Diagnosis

Control

EN/DEN

VDEN(th)

VEN(th)

OUTx

Control

Internal

Supply

VSUV

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