LDS8160-002-T2 IXYS, LDS8160-002-T2 Datasheet - Page 30

• Manufacturer Part Number: LDS8160-002-T2
• Description: IC LED DVR WHT/RGB BCKLGT 16WQFN
• Manufacturer: IXYS
• Series: LED-Sense™, Power-Lite™r
• Type: Backlight, White LED, RGB (I²C Interface)r

Specifications of LDS8160-002-T2

• Topology: Linear (LDO), PWM
• Number Of Outputs: 6
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: RGB, White LED
• Frequency: 1.2MHz
• Voltage - Supply: 2.3 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 16-WQFN, 16-miniQFN
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 25mA
• Internal Switch(s): Yes
• Efficiency: 80%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Lead Free Status / Rohs Status: Details
• Other names: LDS8160-002-T2-2

LDS8160
nominal current setting for
Green
15.6 mA x 100% = 96% duty cycle. This insures
sufficient range for temperature correction. Then
the PWM Duty Cycle would be at 12.9 mA / 15.6
mA = ~ 82.7% for
62.8% for
Note: maximum
1.2 * 12.9 mA = 15.48 mA, so the maximum current
of 15.6 mA is sufficient to meet the
temperature compensation requirements.
This approach uses same static DC current to
establish the ‘base” chromaticity point of the LEDs.
Color
adjustment without any additional color shifts.
A second approach is to establish the white balance
ratio at maximum current using the static LED
current settings.
© 2009 IXYS Corp.
Characteristics subject to change without notice
Dynamic Dimming PWM level for 15 mA /
mixing
Blue
LED.
is
Red
Red
then
LED current at 5ºC would be
LED and 9.8 mA / 15.6 mA =
performed
Green
at 25ºC, set the
with
PWM
Red
30
15.6mA, while
ma x 12.9 mA =
mA / 15 mA x 9.8mA = 10.2mA. The PWM Dynamic
Dimming level could then be set at 96% Duty Cycle for
all three channels to meet the 15 mA for
25ºC. Further dimming needs could use the Global
PWM Dimming feature.
As can be seen, adjusting for white balance can
reduce overall power levels from the chosen 133 mW
(in this example). Different maximum current level
points could be chosen to increase overall luminosity
level and still meet total 133 mW power level.
These choices are user/application dependent. The
approach overviewed in the example can be applied to
other RGB LEDs.
In this approach
Red
13.4
Green
LED current would be 15.6 mA / 15
mA, and
LED current would be set for
Doc. No. 8160_DS, Rev. N1.0
Blue
LED current 15.6
Green
at