LED1642GW datasheet(29/42 Pages) STMICROELECTRONICS

Part #	LED1642GW

Description	16 channel LED driver with error detection current gain control

PDF	42 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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29 / 42 page

DocID024395 Rev 6

29/42

LED1642GW

Thermal flag

The device has a thermal control logic providing a flag status when the internal temperature

exceeds 150 °C (if temperature increases over 170 °C a thermal shutdown protects the

device). This status can be read running the digital key "thermal error reading", holding the

LE high for 13 CLK rising edges (see Figure 25). If thermal alert is asserted, a 16-bit string =

"1" is sent by SDO. The error data is uploaded into EDR register and this error notification is

ready to be streamed through SDO to next 16 CLK rising edges. Hence, thermal flag status

can be:

Figure 25. Thermal flag status

Device temperature

SDO

under 150 °C

“0000 0000 0000 0000”

over 150 °C

“1111 1111 1111 1111”

Thermal

Flag Status

Previous data

13 Clock pulses with LE asserted

AM13706V1

LED1642GW Datasheet(PDF) 29 Page - STMicroelectronics