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CS902-A-R IC pin functions and datasheet.
IC Number - CS902-A-R
Applications- LCD TV, Dextop, and Laptop Monitor LCD Power Management.
The CS902-A-R IC is used in the DC-to-DC converter circuit of the ST3151A05-F-XC-1 32-inch LCD panel. When the LED or LCD TV panel is often damaged, the datasheet of the DC to DC Converter IC is required to repair the LED TV display panel by an alternative method without a COF bonding machine. NT61237H-C6523A/A COF is used in this panel with the CS902-A-R IC.
CS902-A-R IC Pinout and Pin Functions
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| CS902-A-R IC datasheet or CS902 IC Pinout |
CS902-A-R IC datasheet (pins 1 to 20)
Pin Pin Name Description of pins (Pin function)
1 VINB1 Power Supply Input
2 VINB1 Power Supply Input
3 AVIN Analog input voltage for Analog Circuit
4 AGND Ground for Analog Circuit
5 SDA Serial data input & output
6 SCL Serial clock pulse input & output
7 AO Device address 0bit
8 HVS HVS enable
9 NC Not connected (Unused pin)
10 COMP Compensation pin for boos converter
Related Post: CS902-A-R IC Circuit Diagram
11 VL Logic regulator output for internal circuit
12 NTC Temperature compensation pin for VGH
13 PGNG Input power ground
14 PGNG Input power ground
15 LX Switch Circuit pin for boost converter
16 LX Switch Circuit pin for boost converter
17 LXI High-side switch input
18 LXO High-side switch output pin
19 LXO High-side switch output pin
20 VGL Low gate voltage output
• More LCD TV IC: SM4186 IC Datasheet Pinout
CS902 IC pinout (Pin21 to pin 40)
Pin Pin Name Description of pins ( Pin function)
21 DRVN Base driver of the external NPN transistor for the VGL Circuit
22 DEVP The base driver of the external PNP transistor for the VGH Circuit
23 AVIN Analog input voltage for Analog Circuit
24 NC Not connected
25 A1 Compatible device address bit1
26 VFLK Gate shipping control input pin
27 NC Not connected (unused pin)
28 'OGND' OPAMP ground pin, Ground of the operational amplifier circuit
29 OP_ OUT OPAMP out, the Output pin of the operational amplifier circuit
30 NEG Negative input of the operational amplifier circuit
31 POS Positive input of the operational amplifier (OPAMP)
32 VSUP Voltage supply of OPAMP
33 EN Chip Enable
34 VGH Voltage of high gate output
35 VGHM Gate shipping function switch
36 RE Discharge (Gate shipping function circuit)
37 OUTB1 Buck converter output pin
38 LXB1 Switch pin of Buck converter output
39 LXB1 Switch pin of Buck converter output
40 Boot1 Gate driver Voltage for N channel MOSFET of the buck converter
What is the function of AVDD, CKV, STV, VGH, VCOM, VGL, and VGH in LCD Panels? Click Here
CS902-A-R is a unique IC for the power management of TFT LCD panels. It can be used on various TFT panels by designing a circuit that changes the value of the resistor and PWM frequency to apply the bias supply voltage to the required pin while keeping the input voltage of this IC fixed.
Some information about CS902-A-R IC-
• The CS902 IC has a sync boost regulator circuit to output the AVDD voltage from 13 to 19 volts. It also has programmable output current control.
• Programmable VGH charge pump circuit from 20 to 40 volts (Gate shaping voltage).
• Its frequency is fixed at 750 kHz for a DC-to-DC voltage boost.
•There is a negative charge pump circuit for the VGL output. (-4.5Volts to -13.5Volts).
• Swising Frequency 750Khz
• Short Circuit Protection is available
• An excellent system of over-temperature protection.
• VGH Temperature compensation
• 6861AAQ IC Circuit Diagram
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