Ornate Pixels (Electronics)

The RT8293AL IC is installed on the main board of some Samsung and Sony Bravia LED TVs. Moreover, the RT8293AL IC is used in routers, set-top boxes, industrial low-power systems, and various electronics applications. So, to give a clear idea about the input voltage range, output voltage, and current rate of this IC, a basic Circuit Diagram of RT8293AL IC, its pin function, and all the information is published on this page.

Features of RT8293 IC:

Input voltage range- DC 4.5 Volts to 23 Volts

Internal oscillator frequency- 340kHz

Adjustable output voltage- 0.8V to 20V

Output Current- 3 Ampere

Efficiency- 95%

System- Programmable soft start

Protection- Output under voltage, input under voltage lockout, thermal shutdown

Integration- Tow N-Channel Mosfet for the voltage output section.

The performance of this IC is versatile and durable, and it is not easily damaged.

Pinout or pin functions of RT8293 IC:

Pin1- Boot or Bootstrap high side get driver

Pin2- Vin or Voltage input pin

Pin3- Sw or Phase Node: External filter capacitor pin

Pin4- Gnd or Ground. It is connected to the IC's exposed pads for maximum power dissipation.

Pin5- FB. FB is the feedback pin, which receives the feedback voltage from the converter output section to keep the output voltage constant.

Pin6- Comp or compensation node. It is used to compensate for the regulation control loop.

Pin7- En or Enable input pin. 

Pin8- SS or soft start control pin

RT8293AL IC Schematic Circuit Diagram with pinout

Pinout or pin functions of the IC are indicated in the circuit diagram. The values ​​of some of the resistors and capacitors connected in this circuit can be changed depending on the application since the RT8293AL is an adjustable DC-to-DC converter IC. Moreover, this circuit's VIN and Vout sections can have more filter capacitors as required by the application. 

RT8293A IC Circuit Diagram

Components value of RT8292A IC Circuit Diagram for 3.3V output:

R1- 100KΩ, R2- 13KΩ, R3- 75KΩ, R4- 24KΩ

C1- 10µF, C2- 10µF, C3- 10µF, C5- 3.3µF C7- 22µF X 2

Since RT8292 is an adjustable regulator IC, the output voltage of its circuit depends on the values ​​of the inductors and resistors. Below table is recommended component selection for 1V, 1.2V, 1.5V, 2.5V, 3.3V, 5V, and 8V output from RT8293AL IC. The best results are obtained if the tolerance of the resistors is ±5%.

Below is the recommended component selection datasheet for RT8293AL IC ( instead of pdf datasheet )

Component Selection Datasheet For RT8293AL IC

RT8295AH is an 8-pin high-efficiency current mode synchronous step-down voltage regulator IC. It has a wide input voltage range of DC 4.5V to 23 volts. The RT8295AH IC has a maximum output current of 2 amps. This IC is used to power the Sony Bravia LCD TV, and it is also used in other applications whose requirements match the specifications of this IC. On this page, you will find - RT8295AH IC schematic circuit diagram, datasheet, pinout or pin configuration, input-output voltage details, and current (Ampere) related information.

Some outstanding features of RT8295AH IC:

• Soft Start – It is programmable

• Operation frequency- 340kHz fixed

• Output and input under voltage protection

• Thermal shutdown and input under-voltage lockout

• High Accuracy Feedback Voltage - ±1.5%

• Integrated N-Channel MOSFET for output current accuracy

Some essential information about RT8295AH IC for power problem solution of LED TV:

The figure below is a basic circuit diagram of RT8295AH IC. The RT8295AH circuit diagram may have a few more components depending on the input voltage load and current rate of different application circuits.

RT8295AH IC Schematic Circuit Diagram and Pinout

In the circuit diagram below, note that the input voltage (VIN) is connected to pin 2 of the RT8295AH IC. For the Sony Bravia TV, this input voltage is 19 volts. If pin-3 does not output 2 volts, check for a short circuit in the output load circuit. If the FB or feedback pin resistors are damaged, the 2V output will be interrupted. Moreover, the voltage will not be output if other components are damaged.

RT8295AH IC Schematic Circuit Diagram and Pinout

Value of components in RT8295A/H IC basic circuit diagram

(Component values may be slightly different ​​for different applications)

IC- RT8295A / RT8289AH

C1- 0.1µF, C2- 0.1µF, C3- 0.1µF, C4- 3.3nF, C5- 0.1µF

R1-100KΩ, R2- 75KΩ, R3- 13KΩ, R4- 24KΩ, L1- 10µH

Substitution or Equivalent of RT8295AH pdf

So far, I have yet to determine the information on the alternative or substitution IC of RT8295AH. I am collecting data on the IC that is precisely similar to this IC circuit, which I will update as soon as I get it.

Many of you asked on YouTube for a pdf of RT8295AH, so this page published the RT8295AH circuit diagram, pinout, and voltage details instead of a pdf.

TPS65178 or TPS65178A IC is fully programmable with DAC (Digital to Analog Converter). It can provide all bias voltages for TFT LCD TVs and monitor display panels. The TPS65178 IC features an internal 6-channel gamma buffer, VCOM reference, and dynamic gain control.

The TPS65178 IC has four synchronous buck converters, which precisely output the VCORE, HVDD, VEPI, and VCC voltages. Pins 11, 12, 13, and pin 14 of this IC are supplied with positive voltage (VIN) and separate filter capacitors. The VIN voltage range of the TPS65178 IC is 8.6 volts to 14.7 volts.

Now, let's look at the output voltages of  TPS65178 IC. The output range is slightly different for different sizes of TFT LCDs, as shown below:

Boost converter voltage VDD - 12 Volts to 19 Volts (6Bit)

Positive charge pump voltage VGH - 19 Volts to 34 Volts (4Bit)

Buck converter voltage VEPI - 0.9 Volts to 2.4 Volts (4 Bit)

Buck converter voltage VCORE - 0.9 Volts to 2.4 Volts (4 Bit)

Buck converter Voltage VCC - 3.0 Volts to 3.7 Volts (3 Bit)

Gamma voltages: What is the function of gamma voltage in LCD panel, what is the problem if gamma voltages are incorrect, and what is the gamma reference voltage with gamma output voltage? You can watch THIS VIDEO.

TPS65178 IC Schematic Circuit Diagram with Pinout

A schematic Circuit Diagram of  TPS65178 IC below shows the pinout and pin functions of the IC, so the datasheet PDF of TPS65178 IC is not published separately on this page.

TPS65178 is a programmable IC. All output voltages and currents of this IC are determined by I²C programming.

What is I2C  Programming

I²C  programming establishes communication between the microcontroller and peripheral devices by sending and receiving data over two wires (SDA and SCL). It ensures initialization, addressing, and correct start and stop conditions. It provides data transfer between connected devices.

Observe the circuit diagram of the TPS65175 IC. The pin-27 of the IC is SDA, and data is input and output through this pin. Pin-28 is SCL. The clock pulse is transferred through this pin. These two pins are connected to the SDA and SCL pins of the two T-Con memory ICs. Watch THIS VIDEO to learn how to do I2C programming in memory IC.

TPS65178 IC Schematic Circuit Diagram and Pinout

Components List and its value of TPS65178 IC Circuit Diagram:

Value of Transistors:

Q1- MMBT2907ALT1, Q2- MMBT2222A

Value of Inductors:

L1- 10µH, L2- 6.8µH, L3- 10µH, L4 2.2µH, L5- 2.2µH

Value of Diodes:

D1- SL22, D2- SL22, D3- BAT54S, D4- BAT54S, D5- BAT54S, D6- BAT54S

Value of Resistors:

R1- 33KΩ, R2- 2.2KΩ R3- 2.2KΩ,  R4- 10KΩ, R5- 47KΩ, R6- 120KΩ, R7- 100KΩ, R8- 100KΩ

Value of Capacitors:

C1- 10µF, C2- 10µF, C3- 10µF, C4- 10µF,  C5- 10µF, C6- 10µF, C7- 10µF, C8- 1µF, C9- 0.1µF, C10- 10µF, C11- 1µF, C12- 10µF, C13- 10µF, C14 and C15- 10µF, C16-C17-C18-C19- 10µF, C20- 4.7µF, C21- 4.7µF, C22- 0.22µF, C23- 0.1µF, C24- 4.7µF, C25- 0.1µF, C28- 0.22µF, C29- 4.7µF.

Content of this page-

• TP.V56.PA671 Service menu code.

• TP.V56.PA671 Resolution codes.

• TP.V56.PA671 Firmware (software).

• No Power Solution of TP.V56.PA671 LED TV Board.

TP.VA56.PA671 LCD TV combo board is outputting 12 volts properly from SMPS, but the power indicator light is not flashing. TV does not turn on when trying to turn it on by remote or key. In this situation, in some cases, by checking all the voltages of the TP.V56-PA671 circuit board, it can be seen that there is no voltage supply problem, but the TV is not working. In a word, all semiconductor devices and pre-regulator ICs and transistors on the circuit board of the TV are working correctly, but the power light is not turning on.

Not only in TP.V56.PA671 combo board, but in any brand of main board, this kind of problem can occur, and to know why such a problem arises, one must have explicit knowledge about the operating system of an LCD TV.

The motherboard of an LCD TV is precisely like a computer. This board contains input and output devices like a computer. LCD TV display is the output device. And the LCD TV remote and switchboard work like a computer keyboard.

LCD TV includes a processor, RAM, and graphics processor. The 25Q32CSIG memory IC works as RAM, with a storage capacity of 32 kilobytes. The TSUMV56RUU-Z1 IC contains the processor that controls the operating system of the LCD TV. Moreover, the graphics T-Con processor is controlled by the TSUMV56RUU-Z1 IC.

Now, let's come to the real point. The main topic of this article is the power supply of the TP.VA56.PA671 LCD TV board is fine, but the power indicator light is not flashing, and the TV does not turn on when you try to turn it on. Now, we try to understand why such problems occur.

TSUMV56RUU-Z1 processor IC is a component of digital electronics. Its function is signal processing and system control. A 24 MHz clock signal controls the input and output signals and voltages of this IC.

TP.V56.PA671 LCD TV Combo Board No Power Solution

(You can watch this VIDEO to solve the no-power problem of TP.VA56.PA671 LED TV Board)

The power indicator light is connected to the TP.V56.PA671 LCD TV motherboard does not flash due to various reasons. First, check the 12 supply on the board. Then, if the voltages shown in the image below are incorrect, the pre-regulator IC and transistor may be damaged.

The TP.VA56.PA671 board contains a 24 MHz SMD (Surface Mount Device) crystal oscillator to generate the constant clock signal. Two terminals of this crystal oscillator are connected to the ground with two 18pF capacitors.

Standby Voltage of TP.V56.PA671 LCD TV Mainboard

Both capacitors are sometimes damaged or shorted, resulting in the circuit stopping to produce the clock signal or changing the clock frequency. If this happens, the power indicator light of the LCD TV will not flash, and the TV will not turn on. In this case, changing the two 18pF capacitors can solve the problem of the LCD TV power indicator light not flashing.

TP.V56.PA671 Service Menu Code, Resolution Code, and Firmware 

The TP.V56.PA671 LCD TV board can drive LCD/LED displays with resolutions of 1366X768 pixels and 1920x180 pixels. Below is the firmware/software, service menu code, and resolution code of TP.V56.PA671 combo board.

Service Menu Code or factory setting code - Input 208

 TP.V56.PA671 Resolution Code -

Resolution 1366X768 - 81331,

Resolution 1920X1080 - 81332

TP.V56.PA671 Firmware (Software)- Download

RT6908 IC Circuit Diagram:

Application - TFT LCD Panel

This page publishes the schematic circuit diagram, pinout datasheet, voltage details, and all information about the RT6908 IC without PDF. Programmable RT6908 is a unique IC for power solutions of specific TFT LCD panels. The IC is built in the Quad Flat No-Lead (WQFN) package. Its terminal number is 40. The input voltage range of this IC is 9 volts to 16 volts.

RT6908 is a boost and buck converter IC with high current output capability; that's why it is a unique IC for power management of large-screen LCD TVs and monitor panels.

RT6908 IC Input and Output Voltage Details:

Vin: The input or operating voltage is 9 volts to 16 volts, as per the requirement of LCD panels.

AVDD: For most LCD panels, the AVDD voltage is 15.6 volts. VGH- 35.5 Volts. VI/O: 3.3 Volts.

VGL:  -6 Volts, Vcore: 1.1 Volts.

RT6908 IC Schematic Circuit Diagram and Pinout

Many of you have asked me for the schematic circuit diagram of the RT6908 IC and its datasheet in the comment section of YouTube videos and through Facebook messages. I have designed the circuit diagram to your requirements and published it here. The pin configuration or pinout of the RT6908 IC is randomly shown in the circuit diagram itself. Moreover, the values ​​of the components are mentioned below the circuit diagram.

RT9955 IC Schematic Circuit Diagram and pinout as Datasheet

RT6908 IC Circuit Diagram and pinout

Components List and its values of RT6908 IC

Capacitors:

C1- 22µF, C2- 10µF, C3- 2.2nF, C4- 4.7nF, C5- 120µF, C6- 1µF, C7- 1µF, C8- 10µF, C9- 1µF, C10-47nF, C11- 0.1µF, C12-100pF, C13- 22µF, C14- 0.22µF, C15- 0.1µF, C16- 0.22µF, C17- 22nF, C18- 10µF, C19-  , C20- 0.22µF, C21- 10µF, C22- 1nF, C23- 470pF, C24- 22µF, C25- 1µF, C26- 10pF, C26- 10pF, C27- 47nF, C28- 0.22µF, C29- 10µF.

Resistors:

R1- 100KΩ, R2- 47KΩ, R3- 15KΩ, R4- 120KΩ, R5- 1.8KΩ, R6- 1.8KΩ, R7- 6.8Ω, R8- 6.8Ω, R9- 6.8Ω, R10- 6.8Ω,  R10 for Gate of Q3- 20KΩ, R11- 10KΩ, R12- 24KΩ, R13- 1.5Ω, R14- 1.2KΩ, R15-   R16- 4.7KΩ, R17- 4.7KΩ, R18-4.7KΩ, R19- 100KΩ, R20- 6.8Ω, R21- 6.8Ω, R22-  R23- 24KΩ, R24- 33KΩ, R25- 47KΩ, R26- 15KΩ.

Inductors:

L1- 6.8µH, L2- 10µH, L3- 4.7µH.

Equivalent or substitute for RT6908 IC

I am collecting information about which IC can be used instead of RT6908 IC among LCD panels of different companies, so I will publish here as soon as possible what the alternative for RT6908 IC is.