• Description
• Specification

Product Introduction

1. Adopt Taiwan imported program manufacturing, Boost structure, conversion efficiency reaches more than 92%, low device heating, product stability, with longer service life, PCB size is small, ultra-thin design, meet the most demanding requirements, accurate current control error within ±5%, Flexible and convenient current adjustment design can easily match different manufacturers, models of the screen with a little change. The design is in line with EMC requirements and has passed CE certification. High reliability, one year warranty! Can use 12V power supply, reduce the system cost!

2. This product is a constant current plate, the focus of the work is the constant current, the voltage is automatically adaptive, the backlight module of the lamp string automatically adjust the voltage, such as: the backlight module is 4 and 20 strings when the voltage is adjusted to 3.2V * 20 strings = about 64V, assuming that each string of LED current is 60mA then you only need to set the current to 240mA can point this screen.

3. Adopt iron, silicon and aluminum magnetic ring inductance winding, higher temperature coefficient, higher magnetic saturation and higher stability. Because the system conversion efficiency is very high, so the device heating is very low, the temperature rise is controlled at about 25℃ (Note: temperature rise = device surface temperature - ambient temperature), when in the environment of 25℃, the surface temperature of the element is the highest 50℃ (working conditions: in put 24V, out put 64V480mA).

Product Parameters

Limit parameters:

At 24V input: VOUT = 75V IOUT = 720mA or maximum 60W

At 12V input: VOUT = 75V IOUT = 400mA or 30W Max

The limit parameter refers to the maximum bearing capacity of the product in the application process. In actual use, please use it below the limit parameter to ensure the reliability of the product.

Backlight board common electronic symbol code is as follows:

VCC: Positive pole of power supply voltage, circuit supply voltage (usually 12V or 24V)

ON/OFF, ON, EN, ON_BL, etc.: Switching Pin, Switching Signal Pin (Voltage range usually between 2.5V and 5V)

PWM, PDIM, VDAJ, BL-PWM, etc.: brightness adjustment feet or dimming feet. (There are two dimming modes, one is digital mode PWM (the signal voltage is usually 3.3 V), the other is analog dimming-DC (the signal voltage is 0-3.3V/0-5V)

PWM is called pulse width regulation. It produces a rectangular square wave signal with a frequency of 200Hz-2KHz and a voltage amplitude of 3.3V. DIM is an English abbreviation, and DIM is the meaning of dark. The analog dimming is carried out through a DC voltage, usually directly supplying a DC voltage between 0V and 5V to the pin for brightness control purposes.

GND: Ground (Power Negative)

LED+: Light emitting diode (lamp bar) positive pole

LED-: The cathode of light emitting diode (lamp bar)

The above symbols contain most of the LCD motherboard and backlight board on the commonly used code, as long as the connection in accordance with their respective codes should be connected to the correct.

Q & A

Can the constant-current drive plate be used for TV of a certain size?

* Answer: as long as the working voltage of the lamp bar is under 80V no matter how many inches of TV, this product can light it.

Note: This is just a light, not a fit. If you need an exact answer, the best way is to provide the panel's back light module parameters (working voltage, rated current, etc.). If you can provide accurate data, we can do "private customization" like service.

* Then again, what if you can't determine the voltage of the bar?

At this time, a very simple method is to find the original machine on the surface of the const ant current drive plate to see that its output filter electrolytic capacitor voltage is how many volts? If it is 100V voltage resistant, it means that the voltage of its lamp strip will not exceed 80V. Then my product can be lit up. Just take it decsively.

* Now, there's one more thing to be aware of now that we know that voltages can be switched on and that's the current. The crystal size of LED lamp bead determines its required rated current. However, due to various reasons, the module factory will choose various specifications of lamp bead, which leads to different rated working current. To solve this problem we all suggest that if it is more than 26 inch models use our standard parameters: constant current 480mA, if it is less than 24 inch reduce the current to half, that is, 240mA, Here's the reality: 480mA is not meant to be suitable for all screens over 26 inches , but to choose a rough value for situations where the exact parameters cannot be determined. A ccording, to the data feedback from many users before, most of the current is appropriate, but occasionally there will be too bright and so on. At this time, the simplest way is to solve the problem by dimming the function foot. After raising the light foot VADJ, the brightness can be dimmed.

Installation Problem

It doesn't light up when it's installed?

1. Check whether the polarity of the connecting line is correct?

Whether the positive and negative LED poles are correct

2. Measure the power supply voltage to see if there is any voltage on the board. When the machine is turned on, measure if there is any voltage boost for LED+, which is generally higher than VCC voltage.

3. If there is no voltage boost, please measure whether there is voltage ON foot, the normal voltage should be about 3.3V.

4. If all the above conditions are normal. then measure the series resistance value between LED and GND in the case of power off. The normal value should be a small resistance value, less than 2 ohm.

After the verification of the above steps is normal, what remains is only possible to be the problem of the LED lamp bar.

The machine is on, but not bright enough?

First by remote control when the brightness to the brightest see effect, if is not enough light to measure PDIM feet, if the voltage by adjusting the need in other ways than 4V to low voltage, would try the legs dangling directly, if brightness can satisfy you can through the way of change the foot the low voltage to meet the brightness requirements.

If the brightness is not enough by breaking the pins, you need to increase the brightness by other means.