st1cc40 STMicroelectronics, st1cc40 Datasheet - Page 3

• Manufacturer Part Number: st1cc40
• Description: 3 A, 850 Khz Monolithic Synchronous Step Down Constant Current Led Driver
• Manufacturer: STMicroelectronics

ST1CC40
1
1.1
1.2
Pin settings
Pin connection
Figure 2.
Pin description
Table 1.
VFQFPN S08-BW
1
2
3
4
5
6
7
8
-
N.
Pin connection (top view)
Pin description
3
4
5
6
8
1
2
7
-
VINSW Power input voltage
AGND
PGND
Type
VINA
INH
SW
NC
FB
Unregulated DC input voltage
Inhibit control input. Logic low disables operation. Toggling this pin
with a periodic logic square wave of varying duty cycle at different
frequencies controls the brightness of LEDs. Do leave this pin
floating.
Feedback input. The control loop regulates the current in such a way
that the average voltage at the FB input is 100 mV (nominal). The
cathode of the LED and the sense resistor (R
LED current should be connected at this point. The LED current is
given by I
Ground
Regulator output switching pin
Power ground
Ground
Doc ID 18279 Rev 1
LED
= V
FB
/R
sns
Description
sns
) to ground to set the
Pin settings
3/12