r9128d chip circuit diagram (r9128d chip data)

• 1, IC R9128DS substitution
• 2. What is the process of imaging radiation waves, what is the process of imaging data and what is the process of imaging images?
• 3, Today met a circuit diagram met CR928B this switching power chip, which master to help explain the...
• 4, Hisense 32 "TV power board circuit diagram?

IC R9128DS replacement

The

R9128D is a power management IC with a built-in oscillator, comparator, logic unit, and high-power MOS. VDD pin built-in voltage regulator, supply power to the internal circuit. As shown in the figure, this circuit is used as a step-down constant voltage mode. If you want to drive 12 LED strings instead (VFs has about 40V), you can change to constant current mode.

The output current is determined by the non-isolated slurry pressure LED driver chip, if using this chip, the current is up to 350mA, unless you replace another driver chip.

What is the process of imaging radiation waves, what is the process of imaging data and what is the process of imaging images?

1, in nature, all temperatures higher than absolute zero (-2715 ° C) of the object, all the time radiation infrared, the physical nature of infrared radiation is thermal radiation, alsoIt's an electromagnetic wave. Thermal imaging technology is to convert invisible infrared radiation into visible thermal images and convert the data into corresponding temperature images. 2, thermal imaging is a radiation source generated by the body's own temperature, through the infrared camera to collect the infrared emitted by the human body, after computer processing, the formation of infrared thermal imaging, 1800 British physicist Huxell from the perspective of heat to study the color of light, found infrared.

3, infrared thermal imager, is the use of infrared thermal imaging technology, by measuring the infrared radiation of the target object, through photoelectric conversion, signal processing and other means, willA device that converts the heat distribution data of a target object into a video image.

4, the infrared thermal imager is to convert the infrared thermal radiation into the corresponding electrical signal, and then through amplification and video processing, forming a video image that can be observed by the naked eye. Generally speaking, it is to change the invisible infrared radiation into a visible thermal image, and can reflect the temperature distribution of the target surface.

5, computer imaging is the process of converting image information into digital signals through electronic devices, and then processing and display, forming an image that can be directly observed by the human eye.

Today met a circuit diagram met CR928B this switching power chip, which master to help explain the...

1, first of all, this should be a chip without secondary feedback, 1 pin VCC function is IC power supply foot.

2, the main circuit is a switching power supply composed of 2576 (DC-DC conversion).

3, triode, DW1, R1 constitute a simple voltage regulator circuit. RN1 is the overcurrent protectionCircuit maintenance ideas, first repair, if not in the drawing. The answer to this question is as follows: ①, if the machine does not turn on the fault, first measure whether the voltage after the rectification filter is normal.

3, ①, to the Hisense LED32ec260jd power supply board on the ⅤD813 is: 1N4148W switching diode ②, to the VD812 is also: 1N4148W switching diode tube These two diodes are components in the power factor correction circuit.