1 confidential high speed triple laser diode drivers ISL58315 the ISL58315 is a high-speed, triple-output laser diode driver (ldd) for laser scanning projector systems, which require three channels modulated at high speed with independent current control. each output channel provides laser-independent current control for threshold and colo r dacs. separate scale dacs allow independent scaling of both threshold and color dac output values. this allows control of projector brightness and can be used to simplify automatic power calibration (apc) for laser-based systems. pixel data information is transferred through the ldd's high-speed 10-bit or 15-bit parallel video interface. three parallel interface modes provide flexibility and allow users a trade-off among speed, power and bus width. pixel data employs a double data rate scheme, allowing video data to be transferred using both clock edges. applications ? laser-based pico projectors ? rgb scanning and field-based laser projection systems ? generic laser-based applications requiring multiple, independently controlled lasers related literature ? see application block diagram for pico projector (mems) at: http://www.intersil.com/applicat ions/picoprojector%28mems%29.asp features ? high-speed, triple-output laser diode driver supporting up to 720-pixel hd resolution ? up to 1a of peak current output ? fast output switching speeds with pulse rise/fall times of 1ns to 2ns for crisp pixels ? intersil patented laser voltage sampler function provides dynamic power management capability to dramatically minimize system power ? intersil patented smartlinearizer? dac feature provides a linear transfer function (input video code to green laser output), eliminating the need for dsp controller processing algorithms required for non-linear green lasers ? flexible 10-bit or intersil patented 15-bit rgb pixel input formats supported to reduce speed and power. 300mhz maximum data input rate supported for 10-bit rgb mode ? blanking time power reduction reduces ldd current consumption to 3ma typical ? programmable return-to-zero (rtz) function provides maximum flexibility ? integrated heater function for shg green lasers reduces external components ? single 3.3v supply and 1.8v video interface compatible for low power heater adc glue logic data interface and registers serial interface output channel 3 output channel 2 output channel 1 i out2 i out3 i out1 sclk d[14..0]* clk ce rtz mon r set htr htrref v dd a v ss a sen sdio nc v dd vss lowp v sl note: * the following data lines have alternative use, depending on register setting: d2 = en3, d4 = en2, d6 = en1, and d10 = sync figure 1. block diagram caution: these devices are sensitive to electrostatic discharge; follow proper ic handling procedures. 1-888-intersil or 1-888-468-3774 | copyright intersil americas inc. 2011. all rights reserved intersil (and design) and smartlinearizer are trademarks ow ned by intersil corporation or one of its subsidiaries. all other trademarks mentioned are the property of their respective owners. september 30, 2011 fn7543.0 get full datasheet
ISL58315 2 intersil products are manufactured, assembled and tested utilizing iso9000 quality systems as noted in the quality certifications found at www.intersil.com/design/quality intersil products are sold by description only. intersil corporat ion reserves the right to make changes in circuit design, soft ware and/or specifications at any time without notice. accordingly, the reader is cautioned to verify that data sheets are current before placing orders. information furnished by intersil is believed to be accurate and reliable. however, no responsi bility is assumed by intersil or its subsid iaries for its use; nor for any infringem ents of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of i ntersil or its subsidiaries. for information regarding intersil corporation and its products, see www.intersil.com fn7543.0 september 30, 2011 for additional products, see www.intersil.com/product_tree confidential
|
