EVALED7706 STMicroelectronics, EVALED7706 Datasheet - Page 19

• Manufacturer Part Number: EVALED7706
• Description: EVALUATION BOARD FOR LED7706
• Manufacturer: STMicroelectronics

Specifications of EVALED7706

• Current - Output / Channel: 30mA
• Outputs And Type: 6, Non-Isolated
• Voltage - Output: 36 V
• Features: Dimmable, Extra 5V Output
• Voltage - Input: 4.5 ~ 36 V
• Utilized Ic / Part: LED7706
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-6445

LED7706
5.2
5.2.1
Backlight driver section
Current generators
The LED7706 is a LEDs driver with six channels (rows); each row is able to drive multiple
LEDs in series (max. 36 V) and to sink up to 30 mA maximum current, allowing to manage
different kinds of LEDs.
The LEDs current can be set by connecting an external resistor (R
pin and ground. The voltage across the RILIM pin is internally set to 1.23 V and the rows
current is proportional to the RILIM current according to the following equation:
Equation 10
Where K
The graph in
choose the correct value of the resistor to set the desired row current.
Figure 13. Row current vs R
The maximum current mismatch between the rows is ± 2 % @ I
R
= 987 V.
Figure 13
35
30
25
20
15
10
5
0
0
better shows the relationship between I
50
RILIM
I
Row current vs R
ROWx
100
=
R
RILIM
R
K
RILIM
[kΩ]
R
RILIM
150
ROW
rowx
200
RILIM
and R
Operation description
= 20 mA.
) between the RILIM
RILIM
250
and helps to
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