STCF05 STMicroelectronics, STCF05 Datasheet - Page 22

• Manufacturer Part Number: STCF05
• Description: HIGH POWER WHITE LED DRIVER WITH I2C INTERFACE
• Manufacturer: STMicroelectronics

Specifications of STCF05

• Flash Mode: up to 400 mA
• Torch Mode: up to 120 mA

Registers description
9.7
9.8
Figure 12. Current intensity vs. dimming value
Table 12.
9.9
22/33
SHUTDOWN MODE
SUB ADD=02
RESET Value
(write mode)
Power ON,
AUX_REG
FDIM_0~2
These 3 bits define the LED current in flash mode in 8 exponential steps. Max current value
in flash mode is 400 mA.
LDIM
Is an internal dimming register. It cannot be accessed by the user directly. The LDIM value is
determined by the TDIM and FDIM registers. The total number of dimming steps is 13,
because flash and torch current values are overlapping. See
Auxiliary register
AUXI_0~3
This 4 bits register defines the AUX LED current from 0 to 20 mA. See AUX LED Dimming
Table for reference. Loading any value between 1 and 15 also starts the AUX LED current
source timer, if enabled. The AUX LED current source is active only in ready mode, and is
deactivated in any other mode.
AUXI_3
MSB
0
400
400
360
360
320
320
280
280
240
240
200
200
160
160
120
120
80
80
40
40
0
0
0
0
AUXI_2
2
2
0
Doc ID 15257 Rev 4
4
4
AUXI_1
0
dimming steps
dimming steps
6
6
AUXI_0
8
8
0
10
10
AUXT_3
0
12
12
Table 14
AUXT_2
14
14
0
below.
AUXT_1
0
AUXT_0
STCF05
LSB
0