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ISL24201IRTZ-EVALZ 데이터시트(PDF) 5 Page - Intersil Corporation |
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ISL24201IRTZ-EVALZ 데이터시트(HTML) 5 Page - Intersil Corporation |
5 / 12 page ISL24201 5 FN7586.1 December 9, 2010 Application Information The ISL24201 provides the ability to adjust the VCOM voltage during production test and alignment, under digital control, to minimize the flicker of an LCD panel. A digitally controlled potentiometer (DCP), with 256 steps of resolution, adjusts the sink current of the OUT pin. Figure 3 shows the VCOM adjustment using a mechanical potentiometer circuit and the equivalent circuit replacement with the ISL24201. The output is connected to an external voltage divider, as shown in Figure 3, so that the ISL24201 will have the ability to reduce the voltage on the output by increasing the OUT pin sink current. The amount of current sunk is controlled by the I2C serial interface. I2C TIMING fCLK I2C Clock Frequency 400 kHz tSCH I2C Clock High Time 0.6 µs tSCL I2C Clock Low Time 1.3 µs tDSP I2C Spike Rejection Filter Pulse Width 050 ns tSDS I2C Data Set Up Time 250 ns tSDH I2C Data Hold Time 250 ns tBUF I2C Time Between Stop and Start 200 µs tSTS I2C Repeated Start Condition Set-up 0.6 µs tSTH I2C Repeated Start Condition Hold 0.6 µs tSPS I2C Stop Condition Set-up 0.6 µs CSDA SDA Pin Capacitance 10 pF CS SCL Pin Capacitance 10 pF tW EEPROM Write Cycle Time 100 ms NOTE: 6. Compliance to datasheet limits is assured by one or more methods: production test, characterization and/or design. Electrical Specifications Test Conditions: VDD = 3.3V, AVDD = 18V, RSET= 5kΩ, R1 = 10kΩ, R2 = 10kΩ, (See Figure 5); unless otherwise specified. Typicals are at TA = +25°C. Boldface limits apply over the operating temperature range, -40°C to +85°C. (Continued) SYMBOL PARAMETER TEST CONDITIONS MIN (Note 6) TYP MAX (Note 6) UNITS OUT SET ISL24201 or ISL24202 R1 R2 AVDD AVDD VCOM IOUT VDD RSET RA RC AVDD VCOM RB R1 = RA R2 = RB+RC RSET = RARB + RARC 20RB FIGURE 3. MECHANICAL ADJUSTMENT REPLACEMENT |
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