lx1993 Microsemi Corporation, lx1993 Datasheet
lx1993
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lx1993 Summary of contents
Page 1
... LEDs in backlight or frontlight systems. Designed for maximum efficiency, reduced board size, and minimal cost, the LX1993 is ideal for PDA and digital camera applications. The LX1993 features an internal N-Channel MOSFET and control circuitry that is optimized for portable system design applications. ...
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... ASE θ ESCRIPTION for normal operation. Microsemi Integrated Products Division LX1993 P RODUCTION 0. +0. SHDN ...
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... V = 25V Control Logic A2 Shutdown Logic Microsemi Integrated Products Division LX1993 P RODUCTION ≤ 70°C except where A LX1993 Min Typ Max 1.6 6.0 1 100 0.2 0.5 275 300 325 -100 100 0.0 V ...
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... ADJ Ω µ 1206 Case Size SW IN OUT SHDN LX1993 FB ADJ CS + GND Ω Microsemi Integrated Products Division LX1993 P RODUCTION µ Ω µ Ω Page 4 ...
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... The adjustment voltage level is selectable (with limited accuracy) by implementing the voltage divider created between the external series resistor and the internal 2.5MΩ resistor. Disabling the LX1993 is achieved by driving the SHDN pin with a low-level logic signal thus reducing the device power consumption to approximately 0.5µA (typ). ...
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... IN application. connections are described in Table 1. equals 200mA, I The DC input voltage is applied to VBAT (not VCC) PK OUT however the LX1993 IC may be driven from a separate DC equals 4.7µF, V OUT IN source via the VCC input. The output current (i.e., LED brightness) is controlled by adjusting the on-board potentiometer. ) ...
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... Table 1: Input and Ouput Pin Assignments Main power supply for output. (Set external current limit to 0.5A) LX1993 power. May be strapped to VBAT or use a separate supply if VCC jumper is in the SEP position. Do not power output from VCC pin on board.. Potentiometer power. May be strapped to VBAT or use a separate supply if VPOT jumper is in the SEP position ...
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... Table 3: Factory Installed Component List for the LX1993 Evaluation Board Part Quantity Reference 1 CR1 Rectifier, Schottky, 1A, 20V, Powermite Type SMT 1 L1 Inductor, 47uH, 540mA, SMT ...
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... Note: Data taken from LXE1993 Evaluation Board 15 20 Figure 10: Efficiency vs. LED Output Current. = 100Ω 4 LED Configuration Note: Data taken from LXE1993 Evaluation Board Microsemi Integrated Products Division LX1993 P RODUCTION and Inductor Current Waveforms. OUT (AC coupled; 100mV/div) OUT = 3.0V IN 90% 85% ...
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... High Efficiency LED Driver 10mA CH2 = V , CH4 = Microsemi Integrated Products Division LX1993 P RODUCTION 1.10 1.00 0.90 0. Temperature C Figure 12: R DS(on) vs. Temperature Condition 5.0V 10mA ...
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... High Efficiency LED Driver Dim Microsemi Integrated Products Division LX1993 P RODUCTION M I ILLIMETERS NCHES MIN MAX MIN MAX 2.85 3.05 .112 .120 2.90 3.10 .114 .122 – 1.10 – ...
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... Copyright © 2000 Rev. 1.0b, 2005-03-03 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 High Efficiency LED Driver Microsemi Integrated Products Division LX1993 P RODUCTION Page 12 ...