STCF02_07 Datasheet, PDF (3/19 Pages) STMicroelectronics – High power white led driver

STCF02
1 Application
Figure 1. Application circuit
Application
Table 1.
Symbol
R_FLASH
R_TORCH
R_MF
C_I
C_O
L
NTC
C_COMP
R_X
C1
External components
Parameter
Sensing flash current resistor - thick film type (0805)
Sensing torch current resistor - thick film type (0603)
Setting resistor for middle flash mode - thick film type (0402)
Two Input filtering capacitor TDK C1608X5R0J106MT - Ceramic
type (0603) 6.3V
Output capacitance - Ceramic type 0603 6.3V
TDKVLF5014A-4R7
INDUCTANCE
DCR
Negative thermistor - NCP18WF104J03RB - Thick film type
Compensation capacitor - 0402
Reference resistor - 0402
Ceramic Capacitor
Min. Typ. Max. Unit
0.27
Ω
6.2
Ω
8200
Ω
10 2x10 µF
4.7
µF
4.7
µH
0.12
Ω
100
kΩ
100
820 pF
15
kΩ
47
pF
Note:
- The external components proposal should be considered as a design reference guide. The
performances mentioned in the electrical characteristics table are not guaranteed for all the
possible electrical parameters of the components included in this list. On the other hand the
operation of STCF02 is not limited with the use of the external components listed above.
- The C_COMP is optional and may be used if the error amplifier bandwidth (which by default is
set to 2 KHz) has to be decreased because of an unstable driver function. Unstable operation
could be caused by using different values of inductor and output capacitor then recommended.
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