AN2141

Common drain outputs configuration

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Common drain outputs configuration

As mentioned above, the STPxxCx05 is focused on driving high brightness LEDs. The

maximum forward current of HB LEDs can vary from 20 mA to several hundred mA.

A typical current value for super HB LEDs is 350 mA. Thanks to the common drain

configuration the outputs can be connected together as shown in Figure 5. This increases

the performance and current capability of the driver. This configuration enables the driving of

several types of HB LEDs even with the limited current-per-output.

Figure 5.

Common drain outputs configuration