LED8102S datasheet(10/20 Pages) STMICROELECTRONICS

Part #	LED8102S

Description	8-channel LED driver with direct switch control

PDF	20 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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10 / 20 page

LED current settings

The current drawn each OUTn channel is set by RSET resistor value according to the following formula:

IOUT=1.2/Rext*16

Driver headroom voltage

In order to correctly regulate the channel current, a minimum output voltage (VHEADROOM) across each current

generator must be guaranteed.

Figure 7, shows the minimum VHEADROOM slightly less than the target value (output MOS transistor in triode

region).

If the VHEADROOM is lower than the minimum recommended, the regulation of a current is lower than the expected

one. However an excess of VHEADROOM increases the power dissipation.

Figure 7. Minimum Vheadroom vs. IOUT (TJ = 25 °C)

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Vheadroom min. [mV]

LED8102S

LED current settings

DS12963 - Rev 3

page 10/20

LED8102S Datasheet(PDF) 10 Page - STMicroelectronics