STCF03 Datasheet, PDF (11/35 Pages) STMicroelectronics – High power white LED driver with I2C™ interface

Electrical characteristics
6
Electrical characteristics
STCF03
Table 6. Electrical characteristics
(T_J = 25°C, V_I = 3.6 V, 2xC_I = 10 µF, C_O = 1 µF, L = 4.7 µH, R_FL = 0.27 Ω R_TR = 1.8 Ω, R_X = 15 KΩ,
Typ. values @25°C, unless otherwise specified).
Symbol
Parameter
Test condition
Min. Typ. Max. Unit
V_I Input operation supply voltage
2.7
5.5 V
V_{PW_ON} Power ON reset threshold
RESET
V_I rising
2.3
V
I_O Output current adjustment
range I_FLASH
FLASH MODE for V_I = 2.7 V to 5.5 V 60
(STCF03PNR)
800 mA
FLASH MODE for V_I = 2.7 V to 3.3 V 60
600
(STCF03TBR)
FLASH MODE for V_I=3.3 V to 5.5 V
60
800
(STCF03TBR)
Output current adjustment
Torch mode V_I = 2.7 V to 5.5 V
15
200
range I_TORCH
Auxiliary LED output current Ready mode, V_I = 3.3 V to 5.5 V
0
20
adjustment range I_AUXLED
V_O Regulated voltage range
2.5
5.3 V
FB1 Feedback voltage
Torch mode
30
250 mV
FB2 Feedback voltage
Flash mode
30
250 mV
ΔI_O Output current tolerance
Flash mode, I_O = 160 mV/R_FL
-10
10 %
R_{ON_} FB1-FB2 ON resistance
Torch mode, I_O = 200 mA
90
mΩ
I_Q Quiescent current in
SHUTDOWN mode
NTC_ON=0
NTC_ON=1
1
µA
1
Quiescent current in ready -
mode
1.8
mA
f_s
Frequency
V_I = 2.7 V
1.8
MHz
ν
Efficiency of the chip itself
V_I = 3.2 to 4.2 V, Flash Mode,
I_O = 800 mA
87
%
Efficiency of the whole
V_I = 3.2 to 4.2 V, Flash Mode,
76
application
I_O = 800 mA, V_O=V_{fLED_max} + V_FB2 =
5.02 V
See the typical application schematic
It is included losses of inductor and
sensing resistor
OVP Output over voltage protection V_I = 5.5 V, No Load
5.3
V
OV_HYST Over voltage hysteresis
V_I = 5.5 V, No Load
0.3
V
OTP Over temperature protection V_I = 5.5 V
140
°C
OT_HYST Over temperature hysteresis V_I = 5.5 V
20
°C
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