Ornate Pixels (Electronics)

 The RT8292AH is a programmable DC-to-DC IC capable of accepting a wide range of input voltages. Since various techniques control the output voltage of this IC, its devices are highly safe for that. This IC is unique for electronic devices that carry 2 ampere currents. The RT829292AH IC's output voltage is adjustable, so this ICs output volts can be changed by increasing or decreasing the value of the resistors and inductors of its bias voltage circuit. The schematic circuit diagram of RT8292AH IC and its output voltage adjustment formula are presented in this article.

The RT8292ICAH IC's input voltage range is from a minimum of 4.5 volts to a maximum of 23 volts, and the adjustable output voltage is from 0.8 volts to 20 volts. If, for any reason, the input voltage of the RT8292AH IC is lower than the specified limit and the output voltage is high, then it will shut down. This IC works as a buck converter whose operating frequency is 340 kHz.

RT8292AH IC Schematic Circuit Diagram and Pinout

The figure below is the schematic circuit diagram of RT8292AH IC. VIN or supply voltage is input at pin1 of the IC, and voltage is output from pin3 through L1. This circuit's output voltage depends on R2, R3, R4, and L1 values. The values ​​of these three resistors and the inductor are determined according to the voltage divider formula to coordinate with the required operating voltage of various applications.

RT8292AH IC Circuit Diagram and Pinout

The above circuit diagram shows the pinout or pin configuration of the RT8292AH IC.

The values ​​of the components are recommended in the text datasheet below for taking various output voltages from the R8292AH IC.

• For 1-volt output:  R2 will be 3.6KΩ, R3- 3KΩ, R4 is 12KΩ, and L1 is 2µH

• For 1.2 volts output:  R2- 4.3KΩ,  R3- 12KΩ, R4- 24KΩ, L1- 3.6µH

• For 1.5 volts output: R2-5.6KΩ,  R3- 10.5KΩ, R4- 12KΩ,  L1- 3.6µH

• For 2.5 volts output: R2- 9.1KΩ, R3- 25.5KΩ, R4- 12KΩ, L1- 6.8µH

• For 3.3 volts output: R2- 13KΩ, R3- 75KΩ, R4- 24KΩ, L1- 10µH

• For 5 volts output:  R2- 20KΩ, R3- 62KΩ, R4- 11.8KΩ, L1 15µH

• For 8 volts output:  R2- 33KΩ, R3- 27KΩ, R4- 3KΩ, L1- 22µH

C1, C2, C3 - 10µF.  C5- 3.3µF, C7- 33µF. R2- 13KΩ

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 RT8293A 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 RT8293AL 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

To get an idea about the input and output voltage source of RT8293AL IC, watch this VIDEO.

RT8293AL IC Schematic Circuit Diagram with pinout

The circuit diagram indicates the IC's pinout or pin functions. Since the RT8293AL is an adjustable DC-to-DC converter IC, the values of some of the resistors and capacitors connected in this circuit can be changed depending on the application. 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. The table below recommends component selection for 1V, 1.2V, 1.5V, 2.5V, 3.3V, 5V, and 8V output from the 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 the pdf datasheet )

i8973 IC Schematic Circuit Diagram Datasheet pdf  HERE

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 the RT8295AH IC. Depending on the input voltage load and current rate of different application circuits, the RT8295AH circuit diagram may have a few more components.

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 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.

This kind of problem can occur not only in the TP.V56.PA671 combo board, but in any brand of main board, 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. The LCD TV display is the output device. The LCD TV remote and switchboard work like a computer keyboard.

The 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 LCD TV's operating system. Moreover, the TSUMV56RUU-Z1 IC controls the graphics T-Con processor.

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 LCD TV's power indicator light 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's 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