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ISL24201 датащи(PDF) 8 Page - Intersil Corporation |
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ISL24201 датащи(HTML) 8 Page - Intersil Corporation |
8 / 12 page ISL24201 8 FN7586.1 December 9, 2010 Table 1 shows the calculated results of the VCOM voltage with these values. Figure 6 is used to find the minimum saturation voltage for an IOUT maximum of 100µA, which is about 0.3V. The minimum VOUT is 6.5V, which also meets the minimum VOUT - VSET requirements specified in Equation 14: OUT Pin Leakage Current When the voltage on the OUT pin is greater than 10V, there is a leakage current flowing into the pin in addition to the ISET current. Figure 9 shows the ISET current and the OUT pin current for OUT pin voltage up to 19V. In applications where the voltage on the OUT pin will be greater than 10V, the actual output voltage will be lower than the voltage calculated by Equation 6. The graph in Figure 9 was measured with RSET = 4.99kΩ. Power Supply Sequence The recommended power supply sequencing is shown in Figure 10. When applying power, VDD should be applied before or at the same time as AVDD. The minimum time for tVS is 0µs. When removing power, the sequence of VDD and AVDD is not important. Do not remove VDD or AVDD within 100ms of the start of the EEPROM programming cycle. Removing power before the EEPROM programming cycle is completed may result in corrupted data in the EEPROM. Operating and Programming Supply Voltage and Current To program the EEPROM, AVDD must be ≥10.8V. If programming is not required, the ISL24201 will operate over an AVDD range of 4.5V to 19V. During EEPROM programming, IDD and IAVDD will temporarily be higher than their quiescent currents. Figure 11 shows a typical IDD and IAVDD current profile during EEPROM programming. The current pulses are Erase and Write cycles. The EEPROM programming algorithm is shown in Figure 12. The algorithm allows up to 4 erase cycles and 4 programming cycles, however typical parts only require 1 cycle of each, sometimes 2 when AVDD is near the minimum 10.8V limit. TABLE 1. EXAMPLE VOUT vs REGISTER VALUE REGISTER VALUE VOUT (V) 08.49 20 8.34 40 8.18 60 8.02 80 7.87 100 7.71 120 7.55 127 7.50 140 7.40 160 7.24 180 7.09 200 6.93 220 6.77 240 6.62 255 6.50 VOUTMIN 6.5V 15V 20 ---------- > 0.3V + 1.05V == (EQ. 14) 0.000 0.050 0.100 0.150 0.200 0.250 0.300 0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 OUT PinVoltage(V) OUT and SET Pin Current vs. OUT Pin Voltage Register = 255 OUT Pin Current SET Pin Current FIGURE 9. OUT PIN LEAKAGE CURRENT VDD AVDD tVS FIGURE 10. POWER SUPPLY SEQUENCE |
Аналогичный номер детали - ISL24201 |
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Аналогичное описание - ISL24201 |
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