The i8973 IC is used in the MT3151A05-5-XC-5 LCD TV panel, as well as in several GOA panels of the HV320WHV series. Many of you have requested the schematic and datasheet for this IC via Facebook, email, and YouTube comments. After searching the internet extensively for the i8973 PDF datasheet and circuit diagram, I couldn't find a direct match. However, by analyzing several T-con boards from LCD panels, I discovered that the circuit design of the i8973 IC is identical to that of an IC with a different part number. Following rigorous testing, I confirmed that it serves as a perfect substitute. Consequently, I collected the datasheet for that alternative IC and designed the i8973 schematic for you.
i8973 is a Quad Flat No-Lead Package IC. The number of connecting terminals at the bottom of this IC is 10X4=40. This IC includes overload, short-circuit, and thermal protection circuits, so it has a long life and usually does not get damaged.
The i8973 IC contains a microcontroller section, EEPROM, digital-to-analogue converter (DAC), and I2C interface for perfect performance. This IC is controlled by data and clock pulses, which perform excellent power management and signal processing of the LCD panel.
Internal Feature of i8973 IC
• Operating voltage (VIN) - DC 8V to 14V
• Positive boost Regulator for AVDD 13.5V to 19.5 programmable output.
• Buck regulator for 2.2 to 3.7 Volts (The circuit diagram is shown as VI/O or voltage input/output).
• Positive boost voltage regulator for VGH 20V to 40V, it is also programmable.
• Switching frequency - 750KHz, which is fixed.
• Negative charge pump regulator for VGL -4.5V to -13V operated by programmable system.
• VGH temperature compensation.
• Internal 20V OPAMP with +/- 300mA short current for output.
[ Schematic Circuit Diagram of RT6908 IC ]
i8973 IC Circuit Diagram Pinout Data and Voltage Details
Below is the schematic circuit diagram of the i8973 IC, pinout, input-output voltage details, and information on the equivalent IC of the i8973 IC.
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| i8973 IC Circuit Diagram Pinout Data |
I designed this circuit diagram recalling the T-con or scalar board, where L-1 had a value of 100µH, and L-2 had a value of 4.7µH.
List of components of the i8973 IC circuit and their values.
Capacitor: C1- 22µfd, C2- 1µfd, C3- 1µfd, C4- 10µfd, C5 C6 C7 C8- 10µfd, C9- 1µfd, C10- 10µfd, C110.1µfd, C12- 10µfd, C13- 10µfd, C14- 10µfd, C15- 0.47µfd, C16- 10µfd, C17- 0.22µfd, C18- 1µfd, C19- 0.22µfd, C20- 1µfd, C21- 10µfd, CCO- 470pf.
Resistor: R1 R2- 47.7KΩ, R3- 2.2Ω, R4- 10KΩ, R5- 10KΩ, R6- 2.2Ω, R7- 1KΩ, RCO- 75KΩ, RTC1- 51KΩ, RTC2- 22KΩ, RNTC- NCP18XH103F03RB.
Input and Output Voltage of i8973 IC Circuit Board
What is the equivalent IC of i8973
The equivalent or substitute IC for the i8973 is the CS902-A-R. By closely observing two LCD T-Con boards that utilize these ICs, I found that their circuit designs are nearly identical. Therefore, the CS902-A-R can be successfully used as a direct replacement for the i8973 in LCD TV or monitor display panels. Special Note: I noticed that many people mistakenly search Google using the term '18973 IC' (with the number '1' instead of the letter 'i') while looking for the i8973 IC datasheet PDF.
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