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DS3991VR Datasheet(PDF) 3 Page - Maxim Integrated Products |
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DS3991VR Datasheet(HTML) 3 Page - Maxim Integrated Products |
3 / 16 page _______________________________________________________________________________________ 3 Note 1: All voltages are referenced to ground unless otherwise noted. Currents into the IC are positive; currents out of the IC are negative. Note 2: During fault conditions, if AC-coupled, LCM and OVD can go below ground by up to 1V for up to 1s. Note 3: Threshold voltage includes the DC bias-voltage offset. ELECTRICAL CHARACTERISTICS (continued) (VCC = +4.5V to 5.5V, TA = -40°C to +85°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Lamp Regulation Threshold VLRT (Note 3) 2.29 2.35 2.41 V OVD Threshold VOVDT (Note 3) 2.25 2.35 2.45 V Lamp Frequency LFOSCI 40 80 kHz Lamp Frequency Tolerance LFTOL LOSC resistor ±0.1% over temperature; measured from 0°C to +85°C -5 +5 % Burst-Dimming PWM Frequency PFOSCI 80 300 Hz Burst-Dimming PWM Frequency Tolerance PFTOL POSC resistor ±0.1% over temperature -5 +5 % SLOPE = 0 0 V BRIGHT Voltage: Minimum Brightness VBMIN SLOPE = 1 3.3 V SLOPE = 0 3.3 V BRIGHT Voltage: Maximum Brightness VBMAX SLOPE = 1 0 V Gate-Driver Output Rise/Fall tR/tF CL = 600pF 100 ns Typical Operating Characteristics (VCC = 5.0V, TA = +25°C, unless otherwise noted.) ACTIVE SUPPLY CURRENT vs. SUPPLY VOLTAGE SUPPLY VOLTAGE (V) 5.3 5.1 4.9 4.7 3.5 4.0 4.5 5.0 5.5 6.0 3.0 4.5 5.5 DPWM = 100% DPWM = 50% DPWM = 10% SVM TRIPPED GATE QC = 4.5nC fLOSC = 49.6kHz ACTIVE SUPPLY CURRENT vs. TEMPERATURE TEMPERATURE ( °C) 22.5 4.5 5.0 5.5 6.0 4.0 -40.0 85.0 VCC = 5.5V VCC = 5.0V VCC = 4.5V GATE QC = 4.5nC fLOSC = 49.6kHz DPWM = 100% INTERNAL FREQUENCY CHANGE vs. TEMPERATURE TEMPERATURE ( °C) 22.5 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1.0 -1.0 -40.0 85.0 DPWM FREQUENCY LAMP FREQUENCY Low-Cost CCFL Controller |
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