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LX1691 Datasheet(PDF) 6 Page - Microsemi Corporation |
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LX1691 Datasheet(HTML) 6 Page - Microsemi Corporation |
6 / 15 page Microsemi Integrated Products 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 6 Copyright © 2003 Rev. 1.0, 7/16/2004 LX1691 Enhanced Multi-Mode CCFL Controller PRODUCTION DATA SHEET TM ® ] ELECTRICAL CHA RACTERISTICS (CONTINUED) LX1691 Parameter Symbol Test Conditions Min Typ Max Units RAMP GENERATOR Max Strike / Run Frequency Ratio FRAMP_STK Ratio to run frequency, I_SNS = OV_SNS = 0V 3 Maximum Lamp Run Frequency FRAMP_RUNMAX Lamp is ignited; I_R = 20K 250 262 KHz Lamp Run Frequency FLAMP_RUN Lamp is ignited, I_R = 80.6K, TA = 25°C 63 65 67 KHz Lamp Run Frequency FLAMP_RUN Lamp is ignited, I_R = 80.6K 61 65 69 KHz Lamp Run Frequency Regulation over VDDP FLAMP_REG 3.3 < VDDP < 5.5V 0.1 % Internal Digital Dimming Burst Frequency FBURST DIM_MODE = 0V, FLAMP_RUN / 512, I_R = 80.6K 127 Hz PWM BLOCK Error Amp Transconductance GM_EAMP 60 150 µmho Error Amp Output Source Current IS_EAMP 100 µA Error Amp Output Sink Current ISK_EAMP 100 µA Error Amp Output High Voltage VH_EAMP BRITE_OUT – EA_IN = 50mV 2.5 2.9 V Error Amp Output Low Voltage VL_EAMP EA_IN – BRITE_OUT = 50mV 0.015 0.5 V Error Amp Input Offset Voltage VOS_EAMP 30 mV Max Duty Cycle DCMAX 47 % Ramp Valley Voltage RVV 100 mV Ramp Peak Voltage RPV 2.1 V DD_CLK INPUT Pull-up Resistance To VDDA 50 KΩ Input High Threshold VTH_DD_CLK Conventional Dimming 1.6 2.0 V Input Low Threshold VTL_DD_CLK Reverse Dimming 0.4 0.9 V Input High Current IIH_DD_CLK DD_CLK = 5V; VDDP=5V 45 70 µA Input Low Current IIL_DD_CLK DD_CLK = 0V; VDDP=5V -65 -100 µA DIM_MODE INPUT Low State VTL_TRI_ 0.4 0.85 V Floating State VTF_TRI 1.2 1.35 1.8 V High State VTH_TRI 2.35 2.8 V Input High Current IIH_TRI DIM_MODE = 5V 70 120 µA Input Low Current IIL_TRI DIM_MODE = 0V -25 -50 µA ANALOG DIMMER BLOCK BRITE_IN Input Current BRITE_IN II BRITE_IN = 0 to 5V -1 1 µA BRITE_IN = 0V 0 25 60 mV BRITE_IN > 2.05V 1.9 2.0 2.10 V BRITE_ IN < 0V 1.9 2.0 2.1 V Conventional Dimming BRITE_OUT BRITE_IN > 2.05V 0 25 60 mV |
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