Light Intensity Control (V2LIC Series)

Introduction

The V2LIC Series unit is a Digital Intensity Control with PWM control to drive the LED light source intensity. The world first cost effective Digital LED intensity controller with 120KHz PWM frequency.

V2LIC Series Specifications

1. Intensity control:

120 KHz PWM frequency and the duty cycle is an adjustable from (0-100%).

2. External Control:

The V2LIC unit have the interface ability to connect to:

i. Serial Control - able to interface with the PC (COM port or RS232).

ii. IO Control - able to interface with most of the industrial input/output

card with build in an opto-isolator.

3. Enable consistent image contrast:

The image capturing (grey level consistency ) with the 120 KHz PWM control. This will help to improve vision inspection results (to achieve higher accuracy typically in gauging, blob analysis and PRS system).

4. Protection:

There are two protection circuitry designs in for V2LIC series.

i. High Side- An Internal circuit cut off the current if the positive short circuit to external ground. Current will restore back to normal if short circuit is release to normal condition.

ii. Low Side- An Internal circuit limits the current if the load is short circuit.

5. Driver:

High power MOSFET is used to drive the output and guarantee to have long operating hours (100,000).

6. Intensity Linearity:

The intensity is set by digitally (soft touch switch from the panel or control through the RS232). Therefore, the output current is linear and each of the step is:

i. 32 Steps – 3.125%/step (0-100% intensity).

7. Input Voltage Requirement:

i. Normal - 12-24VDC ONLY. (V2LIC-2032-U or V2LIC-4032-U)

****Please aware on the MAX. input voltage for light head.

ii. Strobe – 12-48VDC. (V2LIC-2032-SU or V2LIC-4032-SU)

8. Option: External strobe light control. (EXT)

i. External strobe light control- trigger by external to flash the light head.

ii. Flash duration control- depends on trigger pulse duration.

iii. Intensity on external control- refers to control panel setting.

9. Serial Port Control

The V2LIC is able to control thru serial communication.

10.1 Power Up

V2LIC unit will send 3AH thru TX to PC to indicate V2LIC-X032 unit has ready to receive the control data from PC.

10.2 Data Protocol for setting the intensity

Two byte is required to send to V2LIC-4032/V2LIC-2032. The first byte is the V2LIC signature code and the second byte is indicates the intensity.

10.3 Programming Source Code

A Visual C++project example was included.