STCS2A STMicroelectronics, STCS2A Datasheet - Page 7

• Manufacturer Part Number: STCS2A
• Description: 1.5A MAX CONSTANT CURRENT LED DRIVER
• Manufacturer: STMicroelectronics

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