LX1996ILQ MICROSEMI [Microsemi Corporation], LX1996ILQ Datasheet
LX1996ILQ
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LX1996ILQ Summary of contents
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... A RoHS Compliant / Pb-free - LX1996ILQ Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX1996ILQ-TR) Copyright © 2007 Rev. 1.0, 2007-12-14 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Multi-string LED Back-light Controller ® Temperature compensated LED current ...
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Supply Input Voltage (VIN), EN ........................................................................ -0.3V to 30V CS# pins .............................................................................................................. -0.3V to 28V DSEL1, DSEL2, ...
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TM Name Pin # Over Voltage Protection – Signal input. An external voltage divider sets the maximum boost voltage limit in OVP 19 case of open LED strings. Refer to applications section for functionality. PGND 20 Power Ground. Should be ...
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TM VIN 5V REGULATOR VLDO 4-bit DAC FB BOOST CONVERTER CONTROL LOGIC EN MODE DSEL1 CONTROL DSEL2 LED CURRENT TEMPRATURE OT PROFILER LED CURRENT PRG REFERENCE ANALOG DI DIMMING 0.2V/2V LIMIT PWM RT TRIANGLE WAVE GENERATOR CT CLF PLL Copyright ...
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TM Unless otherwise specified, the following specifications apply over the operating ambient temperature of -40 following test conditions: VIN=12V Parameter Symbol Power Supply Input Voltage Quiescent current Sleep Current I Logic DSEL1 Input High Voltage V DSEL1 Input ...
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TM Unless otherwise specified, the following specifications apply over the operating ambient temperature of -40 following test conditions: VIN=12V LED Short Protection Threshold CS pin Over-voltage Limit LED Current Sink Outputs LED DC Current Programming Accuracy (including string ...
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TM Unless otherwise specified, the following specifications apply over the operating ambient temperature of -40 following test conditions: VIN=12V Ultrasonic Pulse Skipping (USPS) Maximum Switching Interval Thermal Protection Over Temperature Shutdown (Note 2) Thermal Shutdown Recovery (Note 2) ...
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TM Typical Characteristics @ 25°C (Refer to Figure System Efficiency Vs Output Load Efficiency Vs Output load Analog Dimming Mode Analog dim m ...
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Analog dimming. Full load V led EN +5V 6x LED Current ...
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Line Transient Response; VIN 10V to 20V Step Boost Output LED Current VIN ...
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... Figure 1 – Typical Application – This circuit demonstrates the LX1996 and LX1972 interfacing to the LX1800, which is an SMBus ADC/DAC. This application also uses the Display Power Saving Technology (DPST) signal. LX1996ILQ = Multi-string LED Back-light Controller, Microsemi LX1800ILD = SMBus to Analog Interface, Microsemi LX1972IBC = Ambient Light Detector, Microsemi GRM188R60J475KE19 = 4 ...
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OOST ONVERTER The LX1996 uses a variable peak current variable off time hysteretic PFM converter topology where inductor peak current is digitally controlled current mode step up converter in PFM burst mode. The LX1996 ...
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NALOG TO IGITAL IMMING WITH EXTERNAL SYNC The internal dimming oscillator can be synchronized to an external clock on the PWM input. A PLL loop filter capacitor must be connected between CLF and GND pins for ...
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TM DIGITAL DIMMING MODES OF OPERATION Direct Digital Dimming Freq. Range Controller Performance • LED current will be turned On/Off directly by PWM. PWM • The maximum LED current is set by a 100Hz programmable resistor. to • Dimming ratio ...
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TM Ultra Sonic Pulse Skipping (USPS) At low LED current level, the boost frequency may go to audible range. With an USPS option (analog dimming mode only), the audible noise is completely eliminated. When this mode is enabled, maximum switching ...
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NDUCTOR URRENT ENSE ESISTOR Peak inductor current is determined by the resistor connected between SRC pin and GND, R It’s value is determined by SRC. the following equation: 112.5mV VCC = + ...
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OOST ONVERTER NDUCTOR ELECTION The LX1996 boost converter operates always in PFM mode, and in conjunction with the current sink circuit to support digital dimming mode with a minimum pulse width of 4μs. Therefore, a ...
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UTPUT APACITOR ELECTION The output capacitor is preferred to be ceramic for low ESR, small size and relatively lower cost. The capacitor value needs to be large enough to minimize the ripple voltage, which is sensed ...
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TM PCB L R AYOUT ECOMMENDATIONS ( FIGURE SCHEMATIC It is recommended that decoupling capacitors C7 and C4 be placed as close as possible to the LX1996. The Inductor current sense resistor R1 must tie directly to ...
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TM PCB LAYOUT GUIDE – OTTOM PCB LAYOUT GUIDE – ILKSCREEN Copyright © 2007 Rev. 1.0, 2007-12-14 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Multi-string LED Back-light Controller ® ...
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TM 3. Vin (6 - 28V DSEL1 PWM R8 7 GND 100k SM07B-SRSS-TB 4.95 x 8mm R7 N 4.7uF R4 4.99k Unless otherwise specified: - ...
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PRODUCTION DATA – INFORMATION CONTAINED IN THIS DOCUMENT IS PROPRIETARY TO MICROSEMI AND IS CURRENT AS OF PUBLICATION DATE. THIS DOCUMENT MAY NOT BE MODIFIED IN ANY WAY WITHOUT THE EXPRESS WRITTEN CONSENT OF MICROSEMI. ...