Datasheet

DMS MICROELECTRONICS LTD.,
5. Plug-in constant voltage drive mode/among all the way to the output as an example)
This mode is the case for multi-led,in fact,through the R-side output level control external NPN
transistor to drive multiple LED
Limiting resistor calculation-R=(VDD-VLED-VCE)/18mA
Work in the switch area where the transistor,VCE is the transistor saturation voltage,and
generally 0.5V-0.8V.the base resistance RB desirable 2K-5K,in front of other signal connections to
the same pattern.VLED single lamp is generally preferable to red light:1.8V-2V,green;3V-3.5V,blue
light:3V-3.5V
The model commonly used in multi-channel”first string and the” connection,in view of any one
LED in series branch circuit,it will lead to slip all the LED is off ,so the use of the connection should
follow the following principles;slip LED series number is generally 3 to6,should be more not less
parallel branches.
Jen enable clients to choose according to customer neeeds.
6. Cascade signal driver capability,and connection method
■ As chip desingn push-pullo drive circuit ,making the cascade signal drive capability have
increased significantly.Twisted pair is recommended to increase the transmission
distance.To enhance the anti-interference ability in the position near the IC input, the
addition of two 20P decoupling capacitors.
■ Proposed transmission close at DOUT and COUT mouth and then output to the lower
series resistance in order to prevent signal reflection;operating voltage in the 4.5V-12V with
resistance to 39Ω resistor,the resistance should be installed close to the IC’s output