STCS05A Datasheet, PDF (7/18 Pages) STMicroelectronics – 0.5 A max constant current LED driver

STCS05A
5
Timing
Figure 3. PWM and output current timing
Timing
PWM
90%
Current ^10%
T_D Trise
Figure 4. Block diagram
T_D Tfall
V_CC
EN
PWM
GND
High Voltage
45 V
Preregulator
3.3 V
Enable
Input
PWM
Input
Bandgap
1.23 V
Shutdown
all blocks
75 mV
Enable,
PWM &
Slope controll
Logic
Low Voltage 3.3 V
Thermal
Shutdown
+
- _Disc
comp
H.V.
45 V
+
100 mV
Slope
Control
-
Comp
Logic
Driver
SLOPE
DISC
DRAIN
FB
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