stcf03i STMicroelectronics, stcf03i Datasheet - Page 23

• Manufacturer Part Number: stcf03i
• Description: High Power White Led Driver With I2ctm Interface
• Manufacturer: STMicroelectronics

Table 15. Status register
8.10
8.11
8.12
8.13
8.14
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SHUTDOWN MODE
SUB ADD=03
RESET Value
(read mode)
STAT_REG
Power ON,
F_RUN
This bit is kept HIGH by the STCF03I during Flash mode. By checking this bit, the µP can
verify if the Flash mode is running or has been terminated by the Time Counter.
LED_F
This bit is set by the STCF03I when the voltage seen on the LED pin is V
a Torch or Flash operation. This condition can be caused by an open LED, indicating a LED
failure. The device automatically goes into Ready mode to avoid damage. Internal high
frequency filtering avoids false detections. This bit is reset by the STCF03I following a read
operation of the STAT_REG.
NTC_W
This bit is set HIGH by the STCF03I and the ATN pin is pulled down, when the voltage seen
on the pin Rx exceeds V
value at the LED measured by the NTC. The device is still operating, but a warning is sent to
the µP. This bit is reset by the STCF03I following a read operation of the STAT_REG.
NTC_H
This bit is set HIGH by the STCF03I and the ATN pin is pulled down, when the voltage seen
on the pin Rx exceeds V
value at the LED measured by the NTC. The device is put in Ready mode to avoid damaging
the LED. This bit is reset by the STCF03I following a read operation of the STAT_REG.
OT_F
This bit is set HIGH by the STCF03I and the ATN pin is pulled down, when the chip over-
temperature protection (~140°C) has put the device in Ready mode. This bit is reset by the
STCF03I following a read operation of the STAT_REG.
MSB
N/A
0
F_RUN
REF4
REF5
0
. This threshold (1.2 V) corresponds to an excess temperature
= 0.56 V. This threshold corresponds to a warning temperature
LED_F
0
NTC_W
0
NTC_H
0
OT_F
0
N/A
REF2
0
> 5.3 V during
VOUTOK_N
LSB
0