rev. 0.1 copyright ? 2015 by si licon laboratories si88xxxiso-evb si88xxxiso-evb s i 88 xxx iso-evb u ser ? s g uide description this document describes the operation of the si88xxxiso-evb. kit contents the si88xxxiso evaluation kit contains the following items: ?? si88xxxiso-evb ?? SI88241ED-IS installed on the evaluation board. si88xxxiso-evb overview hardware overview and setup power the evb by applying a 3.0 to 5.5 v dc supply to terminal block j1. the isolated output is available at terminal block j2. test points for these are available at the upper edge of the evb. the default evb configuration has the header jp13 shorte d, so the dc-dc output powers the vddb supply (u1 pin 19) of the SI88241ED-IS. the acceptable input voltage to the vddb supply pin is 3.0 to 5.5 v. if the user chooses to generate an output voltage outside this voltage range , the jumper at jp13 must be removed and a separate supply source co nnected to vddb through jp13. to measure input supply current, clip a differential probe across jp12 to access each side of sense resistor r20. the sh input (u1 pin 7) disables the dc-dc converter function. install a jumper across jp9 to pull the sh input high and disable the dc-dc converter. if interfacing to an exte rnal controller board through the jp9 header, the controller must drive sh low for normal operation and high to disable the dc-dc. the evb has a series of header s for connecting to each digital channel . the inside conducto r of each 2x1 header is connected to the device pin and the outer conductor is tied to ground through a protection resistor. connect to each side of the si88xxxiso-evb to external controllers through a two-ro w ribbon cables wit h one row grounded.
si88xxxiso-evb 2 rev. 0.1 1. si88xxxiso-evb schematics this is an output input power supply do not connect an external power supply to j2 *2 *1 add zener protection valid range: 3.3v to 5v +/- 10% *3 *4 *5 *5 vdda vout vdda vout vdda jp11 j1 1 2 jp8 tp1 vdda r28 499 jp4 r24 499 r31 499 d21 red tp3 vout jp1 r25 499 jp9 tp5 sh r23 10k r26 499 tp2 gnda tp4 gndb jp6 d20 5.6v jp5 r27 499 r29 499 jp2 r21 10k jp10 jp7 j2 1 2 r22 10k u1 si88241 vdda gnda gndb a4 a3 a2 a1 sh b1 b2 b3 b4 vout r30 499 jp3 d22 red figure 1. si88xxxiso-evb schematic (1 of 2)
si88xxxiso-evb rev. 0.1 3 default evb converter configuration: vdda = 3.3v to 5v +/- 10% vout = 5v for vout of 3.3v, change r1 to 43.2k and r2 to 20.0k can be used to measure input current testpoint for comp pin comp comp vdda gnda vout gndb a4 a3 a2 a1 b1 b2 b3 b4 sh vout vdda vout vdda c8 100pf tp9 gndb r20 0.25 r7 49.9k c1 10uf jp12 tp6 t1_pri r8 100 c10 10uf js1 tp8 t1_sec t1 2uh 2 3 5 8 c9 0.1uf tp10 comp r5 49.9k js2 r6 13.3k tp7 vsw c2 10uf isolation u1 si88241 vdda 4 vddb 19 nc 17 vsw 2 gndp 1 a1 7 a2 8 b3 12 b4 11 a3 9 a4 10 b1 14 b2 13 vddp 3 sh 6 comp 15 gndb 20 gnda 5 vsns 16 vreg 18 jp13 c12 0.1uf c5 0.1uf d1 db2440100l c11 1.5nf c3 0.1uf figure 2. si88xxxiso-evb schematic (2 of 2)
si88xxxiso-evb 4 rev. 0.1 2. si88xxxiso-evb layout figure 3. si88xxxiso-evb layout top bottom
si88xxxiso-evb rev. 0.1 5 3. bill of materials table 1. si88xxxiso-evb bill of materials part reference description mfr mfr part number c1 c2 c10 cap, 10 f, 10 v, 10%, x7r, 1206 venkel c1206x7r100-106k c3 c5 c9 c12 cap, 0.1 f, 10 v, 10%, x7r, 0603 venkel c0603x7r100-104k c8 cap, 100 pf, 50 v, 10%, x7r, 0603 venkel c0603x7r500-101k c11 cap, 1.5 nf, 16 v, 10%, x7r, 0603 venkel c0603x7r160-152k d1 dio, fast, 40 v, 1.0a, sod-128 panasonic db2440100l d20 dio, zener, 5.6 v, 500 mw, sod123 on semi mmsz5232bt1 d21 d22 led, red, 631 nm, 20 ma, 2 v, 54mcd, 0603 lite-on ltst-c190krkt j1 j2 conn, term block 2pos, 5mm pcb phoenix contact 1729018 jp1 jp2 jp3 jp4 jp5 jp6 jp7 jp8 jp9 jp10 jp11 jp12 jp13 header, 2x1, 0.1in pitch, tin plated samtec tsw-102-07-t-s js1 js2 shunt, 1x2, 0.1in pitch, tin plating samtec snt-100-bk-t mh1 mh2 mh3 mh4 hdw, screw, 4-40 x 1/4" pan head, slotted, nylon richco plastic co nss-4-4-01 r5 r7 res, 49.9k, 1/10w, 1%, thickfilm, 0603 venkel cr0603-10w-4992f r6 res, 13.3k, 1/16w, 1%, thickfilm, 0603 venkel cr0603-16w-1332f r8 res, 100 ? , 1/16w, 1%, thickfilm, 0603 venkel cr0603-16w-1000f r20 res, 0.25 ? , 1/2w, 1%, thickfilm, 1206 venkel lcr1206-r250j r21 r22 r23 res, 10k, 1/10w, 5%, thickfilm, 0603 venkel cr0603-10w-103j r24 r25 r26 r27 r28 r29 r30 r31 res, 499 ? , 1/10w, 1%, thickfilm, 0603 venkel cr0603-10w-4990f so1 so2 so3 so4 hdw, standoff, 1/4" hex, 4-40x3/4", nylon keystone 1902d t1 transformer, power, flyback, 2.0 h primary, 100 nh leakage, 1:4, 1 tap, smt umec utb02185s tp1 tp2 tp3 tp4 tp5 tp6 tp7 tp8 tp9 tp10 testpoint, black, pth kobiconn 151-203-rc u1 ic, isolator, dc dc internal switch, sh, 4 digital ch, so20 wb silicon labs SI88241ED-IS
si88xxxiso-evb 6 rev. 0.1 4. si88xxxiso-evb ordering guide table 2. si88xxxiso-evb ordering guide ordering part number (opn) description si88xxxiso-kit si88xxx dc-dc digital isolator evaluation board kit
si88xxxiso-evb rev. 0.1 7 c ontact i nformation silicon laboratories inc. 400 west cesar chavez austin, tx 78701 tel: 1+(512) 416-8500 fax: 1+(512) 416-9669 toll free: 1+(877) 444-3032 please visit the silicon labs technical support web page: https://www.siliconlabs.com/support/pages/contacttechnicalsupport.aspx and register to submit a technical support request. patent notice silicon labs invests in research and development to help our cust omers differentiate in the market with innovative low-power, s mall size, analog- intensive mixed-signal soluti ons. silicon labs' extensive pat ent portfolio is a testament to our unique approach and world-clas s engineering team. silicon laboratories and silicon labs are trademarks of silicon laboratories inc. other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders. the information in this document is believed to be accurate in all respects at the time of publ ication but is subject to change without notice. silicon laboratories assumes no responsibili ty for errors and omissions, and disclaim s responsibility for any consequences resu lting from the use of information included herein. a dditionally, silicon laboratorie s assumes no responsibility for the functioning of und escribed fea- tures or parameters. silicon laboratories reserves the right to make changes without further notice. silicon laboratories makes no warran- ty, representation or guarantee regarding t he suitability of its products for any par ticular purpose, nor does silicon laborato ries assume any liability arising out of the application or use of any product or circuit, and specif ically disclaims any and all liability, in cluding without limitation consequential or incidental damages . silicon laboratories products are not designed, intended, or authorized for use in applica tions intend- ed to support or sustain life, or for any other application in which the failure of the silicon laboratories product could crea te a situation where personal injury or death may occur. should buyer purchase or us e silicon laboratories products for any such unintended or unaut horized application, buyer shall indemnify and hold silicon laboratories harmle ss against all claims and damages.
|
