STCS1_08 Datasheet, PDF (7/17 Pages) STMicroelectronics – 1.5 A max constant current LED driver

STCS1
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
High Voltage
45 V
Preregulator
3.3 V
Enable
Input
PWM
Input
GND
Low Voltage 3.3 V
Bandgap
1.23 V
Thermal
Shutdown
Shutdown
all blocks
75 mV
Enable
&
PWM
Logic
100 mV
+
-
Comp
+
- _Disc
comp
Logic
Driver
H.V.
45 V
DISC
DRAIN
FB
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