TDE1708DFT Просмотр технического описания (PDF) - STMicroelectronics

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TDE1708DFT

Intelligent power switch

STMicroelectronics 

Application information

3

Application information

TDE1708DFT

The LED driver tells the output status. It can source or sink current (Iold typ = 3 mA),

according to the output configuration chosen. The thresholds, represented by the output

comparator in the block diagram, are set at about 1.5 V - 2 V.

For instance, in the high side load case of the Application Circuit, when the voltage on pin 8

(the output) differs from VCC less than 1.5 V, the output is sensed in “OFF” state and the

LED driver is disabled.

If instead pin 8 differs from VCC more than 3 V (the output comparator threshold value plus

the drop voltage on the LED), then the output is sensed “ON” and the driver will force the

current on the LED.

Figure 3. Low side driver topology

Figure 4. High side driver topology

TDE1708DFT

TDE1708DFT

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