LX1990-03EVAL Microsemi Analog Mixed Signal Group, LX1990-03EVAL Datasheet
LX1990-03EVAL
Specifications of LX1990-03EVAL
LX1990-03EVALR
Related parts for LX1990-03EVAL
LX1990-03EVAL Summary of contents
Page 1
... IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com 5V - Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX1990ILM-TR) Copyright © 2001 Rev. 1.0d, 2005-03-14 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Dual Programmable LED Current Sink ® ...
Page 2
... Copyright © 2001 Rev. 1.0d, 2005-03-14 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Dual Programmable LED Current Sink ® θ A 41°C/W MBIENT JA x θ ESCRIPTION Microsemi Integrated Products LX1990 ISET OUTA VDD 2 GND ENA ACKAGE (Top View) 1990 xxxx LMI ...
Page 3
... LX1990 LX1990 Units Min Typ Max 2.7 5 1.25 0 300 0.1 10 0.1 30 ≤ ≤ T 85°C and the A ≤ 10V. Typical values are 25°C A LX1990 Min Typ Max 1.4 2 3.0 4 0.08 1 0.8 1.55 2 1 300 1.225 1.25 1.275 18.5 20 21.5 * 100 ...
Page 4
... Copyright © 2001 Rev. 1.0d, 2005-03-14 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Dual Programmable LED Current Sink ® 1:1 Current Mirror 1.25V REF - ISET Figure 1 – Simplified Block Diagram Microsemi Integrated Products LX1990 I I OUTA OUTB 100X 100X GND Page 4 ...
Page 5
... UNCTIONAL ESCRIPTION The LX1990 is designed to drive LED’s used in display illumination and signaling applications such as cellular telephones and PDA’s. With a 5V supply, the two independently regulated constant current outputs can drive 2 white LED’s (V < 4.5V) in parallel green or F amber LED’s (V < ...
Page 6
... ENA 2V / AOUT DIV BOUT IOUT 10mA / DIV 4.7 5.7 Microsemi Integrated Products LX1990 ENA=0.4V OUT 5. (V) OUT V vs. Current DROPOUT 30mA 25mA 20mA 15mA 10mA 5mA 0.2 0.3 0.4 0.5 0.6 0.7 0.8 Dropout (V) Enable to Output Response 10µ ...
Page 7
... Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Dual Programmable LED Current Sink ® 3.3V ON/OFF 4K O pen Collector or Open Drain Drive .1µF GRN UTB GRN I O UTA ON/OFF Microsemi Integrated Products LX1990 VDD I O UTB I ENA O UTA ISET GND .1µF + Volts LOAD I VDD O UTB I ENA O UTA ...
Page 8
... ISET GND 8.2nF 1K C SLOPE 5K PWM 2N2222A 10K 100K 1V / DIV 10µA / DIV 20µs / DIV Figure 9 – PWM – Low EMI Wide Range Microsemi Integrated Products LX1990 3V VDD I OUTB ENA I OUTA ISET GND R MIN R MAX Figure 7 – Manual Control ON / OFF I VDD OUTB ENA ...
Page 9
... TM 3.3V ON/OFF PW M 10K 100K Figure 11 – Using the LX1990 With High Voltage Supplies Copyright © 2001 Rev. 1.0d, 2005-03-14 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Dual Programmable LED Current Sink ® Optional circuit for 10 W hite higher efficiency ...
Page 10
... Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Dual Programmable LED Current Sink ® Internally Connected Note: together, but isolated from all other terminals Microsemi Integrated Products LX1990 M I ILLIMETERS NCHES Dim MIN MAX MIN A 2.90 3.10 0.114 B 2.90 3.10 0.114 C ...
Page 11
... Microsemi reserves the right to change the configuration and performance of the product and to discontinue product at any time. Copyright © 2001 Rev. 1.0d, 2005-03-14 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Dual Programmable LED Current Sink ® Microsemi Integrated Products LX1990 Page 11 ...