cat4002a ON Semiconductor, cat4002a Datasheet - Page 3
![no-image](/images/manufacturer_photos/0/4/495/on_semiconductor_sml.jpg)
cat4002a
Manufacturer Part Number
cat4002a
Description
Constant Current Led Driver With 32 Dimming Levels And Rset
Manufacturer
ON Semiconductor
Datasheet
1.CAT4002A.pdf
(11 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
cat4002aSD-GT3
Manufacturer:
ON Semiconductor
Quantity:
2 350
Company:
Part Number:
cat4002aTD-GT3
Manufacturer:
ON Semiconductor
Quantity:
2 000
NOTE:
LED Current Setting
external resistor connected between the RSET pin and
ground. Table 5 lists standard resistor values for several
LED current settings.
becomes enabled and the LED channel current is set to the
full scale current according to the resistor RSET.
LED current ≅ 125 x V
Table 3. RECOMMENDED OPERATING CONDITIONS
Table 4. RECOMMENDED EN/DIM TIMING
V
Ambient Temperature Range
I
On the CAT400XA, the full scale LED current is set by the
When the EN/DIM is initially taken high, the CAT400XA
LED
T
IN
Symbol
PWRDWN
T
T
T
per LED pin
LED
LO
HI
Typical application circuit with external components is shown on page 1.
EN/DIM
Current
LED
EN/DIM program low time
EN/DIM program high time
LED current settling time
EN/DIM low time to shutdown
Shutdown
T
LED
RSET
/ RSET
Name
Figure 2. CAT400XA EN/DIM Dimming Timing Diagram
Parameter
T
100%
LO
(For 2.4 V ≤ V
97% 94%
http://onsemi.com
T
HI
IN
32 Levels
≤ 5.5 V, over full ambient temperature range −40°C to +85°C.)
3
Conditions
Table 5. RSET RESISTOR AND LED CURRENT
3%
LED Current [mA]
0%
Full Scale
10
15
20
25
30
40
2
5
100%
Min
0.2
0.2
T
PWRDWN
−40 to +85
Typ
2.4 to 5.5
10
3
Rating
0 to 40
Shutdown
RSET [kW]
Max
100
5
40.2
15.4
7.68
4.99
3.74
3.00
2.49
1.87
Units
Unit
mA
°C
ms
V
ms
ms
ms