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DS3984Z Datasheet(PDF) 3 Page - Dallas Semiconductor |
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DS3984Z Datasheet(HTML) 3 Page - Dallas Semiconductor |
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3 / 24 page  4-Channel Cold-Cathode Fluorescent Lamp Controller _____________________________________________________________________ 3 ELECTRICAL CHARACTERISTICS (continued) (VCC = +4.5V to +5.5V, TA = -40°C to +85°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS High-Level Output Voltage (GA, GB) VOH2 IOH2 = -1mA VCC - 0.4 V UVLO Threshold—VCC Rising VUVLOR 4.3 V UVLO Threshold—VCC Falling VUVLOF 3.7 V UVLO Hysteresis VUVLOH 100 mV SVM Threshold VSVMT 1.8 2.0 2.2 V SVM Hysteresis VSVMH 50 mV LCM and OVD Source Current 4µA LCM and OVD Sink Current 4µA LCM and OVD DC Bias Voltage VDCB 1.35 V LCM and OVD Input Resistance RDCB 50 k Ω Lamp Off Threshold VLOT (Note 3) 0.3 0.4 0.5 V Lamp Overcurrent Threshold VLOC (Note 3) 1.8 2.0 2.2 V Lamp Regulation Threshold VLRT (Note 3) 0.9 1.0 1.1 V OVD Threshold VOVDT (Note 3) 0.9 1.0 1.1 V Lamp Frequency Range fLF:OSC 40 80 kHz Lamp Frequency Source Frequency Tolerance fLFS:TOL LOSC resistor ±2% over temperature -5 +5 % Lamp Frequency Receiver Duty Cycle fLFR:DUTY 40 60 % DPWM Frequency Range fD:OSC 22.5 440.0 Hz DPWM Source Frequency Tolerance fDSR:TOL POSC resistor ±2% over temperature -5 +5 % DPWM Receiver Duty Cycle fDFE:DUTY 40 60 % DPWM Receiver Frequency Range fDR:OSC 22.5 440.0 Hz DPWM Receiver Minimum Pulse Width tDR:MIN (Note 4) 25 µs BRIGHT Voltage—Minimum Brightness VBMIN 0.5 V BRIGHT Voltage—Maximum Brightness VBMAX 2.0 V Gate-Driver Output Rise/Fall Time tR/tF CL = 600pF 100 ns GAn and GBn Duty Cycle (Note 5) 44 % |
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