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december 2010 doc id 17689 rev 1 1/32 AN3240 application note ultrasound hv pulser demonstration board introduction this application note describes a ll the possible demo applicatio ns helpful in carrying out a full evaluation of sthv748 functions. the sthv748 high-voltage, high-speed pulser generator features four independent channels. it is designed for medical ultrasound applications, but can also be used for other piezoelectric, capacitive, or mems transducers. the device contains a controller logic interface circuit, level translators, mosfet gate drivers, noise blocking diodes, and high-power p-channel and n-channel mosfets as output stages for each channel. there is also a clamping-to-ground circuitry, anti-leakage, an anti-memory effect block, a thermal sensor, and a hv receiver switch (hvr_sw), which guarantees a strong decoupling during the transmission phase. moreover, the sthv748 includes self-biasing and thermal shutdown blocks (see block diagram in figure 1 ). each channel can support up to five active output levels with two half bridges. the output stage of each channel is able to provide 2 a peak output current. in order to reduce power dissipation during continuous wave mode, the peak current is limited to 0.6 a (a dedicated half bridge is used). www.st.com
contents AN3240 2/32 doc id 17689 rev 1 contents 1 sthv748 - pinout configur ation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 sthv748 block diagram and truth table . . . . . . . . . . . . . . . . . . . . . . . . . 7 3 sthv748 pcb demo descrip tion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4 pcb demo description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 4.0.1 capacitances and resistances list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 5 operating supply conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 5.1 load selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 5.2 fixed sthv748 pins on pcb demo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 6 demonstration kit composition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 6.1 method 1 (flexible - based on bnc pcb adapter) . . . . . . . . . . . . . . . . . . 18 6.1.1 how to drive the sthv748 for method 1 . . . . . . . . . . . . . . . . . . . . . . . . 19 6.2 method 2 (use of the motherboard based on the stm3210e-eval) . . . . 20 6.2.1 motherboard communication setting . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 6.2.2 motherboard driving performance for the pcb demo . . . . . . . . . . . . . . 22 6.2.3 turn on demo system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 6.2.4 turn off demo system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 6.2.5 acquisition examples of pw, cw and pc mode . . . . . . . . . . . . . . . . . . 27 6.3 method 3 (labview interface - use of the hsdio pcb connector) . . . . . 29 7 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
AN3240 list of tables doc id 17689 rev 1 3/32 list of tables table 1. pinout configuration table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 table 2. sthv748 truth table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 table 3. capacitances and resistances list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 table 4. c1 head connector pin vs sthv748 pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 table 5. dc working supply conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 table 6. current consumption in cw mode, @ 5 mhz, hvp/m1=5 v, no-load . . . . . . . . . . . . . . . 15 table 7. power-up sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 table 8. special pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 table 9. stm3210e-eval pin configuration table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 table 10. document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
list of figures AN3240 4/32 doc id 17689 rev 1 list of figures figure 1. sthv748 single channel block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 figure 2. pcb demo schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 figure 3. pcb top layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 figure 4. c1 (conn1) head connector description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 figure 5. pcb demo image . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 figure 6. load configuration schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 figure 7. demonstration kit composition (pcb demo plus bnc pcb adapter) . . . . . . . . . . . . . . . . . 18 figure 8. pcb adapter image, top layout and top schematic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 figure 9. demonstration kit system image. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 figure 10. inputs set of generators for pw mode (4 cycles - tx0 pulser chx) . . . . . . . . . . . . . . . . . . 19 figure 11. diodes led status on the pcb adapter which indicates in4=1 and in3=0 . . . . . . . . . . . . 20 figure 12. demonstration kit based on the stm3210e-eval system . . . . . . . . . . . . . . . . . . . . . . . . 20 figure 13. demonstration kit based on the stm3210e-eval system image . . . . . . . . . . . . . . . . . . . 21 figure 14. stm3210e-eval pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1 figure 15. pw mode functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 figure 16. cw mode functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 figure 17. pc mode functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 figure 18. supply connection for demonstration kit with the stm3210e-eval . . . . . . . . . . . . . . . . . 23 figure 19. main menu on stm3210e-eval display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 figure 20. main menu selection on the stm3210e-eval display . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 figure 21. example of ?continuous mode? selection on the stm3210e-eval display. . . . . . . . . . . . 25 figure 22. exit the mode selected on the stm3210e-eval display . . . . . . . . . . . . . . . . . . . . . . . . . . 26 figure 23. reset key on the stm3210e-eval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 figure 24. pw mode (hvp0=60 v hvm0=-60 v 100 w//300 pf) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 figure 25. cw mode hvp1=5 v hvm1=-5 v 100 w//300 pf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 figure 26. cw mode hvp1=10 v hvm1=-10 v 100 w//300 pf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 figure 27. pc mode hvp0=60 v hvm0=-60 v 100 w//300 pf. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 figure 28. labview equipment used to develop the sthv749 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 figure 29. sthv748 labview pc control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 figure 30. sthv748 demo system for labview evaluation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
AN3240 sthv748 - pinout configuration doc id 17689 rev 1 5/32 1 sthv748 - pinout configuration table 1. pinout configuration table pin number pin name 1agnd 2 rif_hvm1_1 3hvm1_a 4hvm0_a 5hvout_a 6 hvp0_a 7 rif_hvp1_1 8 hvp1_a 9 hvp1_b 10 rif_hvp0_1 11 hvp0_b 12 hvout_b 13 hvm0_b 14 hvm1_b 15 rif_hvm0_1 16 d_ctr 17 in4 18 in1_b 19 in2_b 20 in3_b 21 vddp_1 22 gnd_pwr_3 23 xdcr_b 24 lvout_b 25 lvout_c 26 xdcr_c 27 gnd_pwr_2 28 vddm_1 29 in3_c 30 in2_c 31 in1_c 32 thsd
sthv748 - pinout configuration AN3240 6/32 doc id 17689 rev 1 33 agnd_1 34 rif_hvm1 35 hvm1_c 36 hvm0_c 37 hvout_c 38 hvp0_c 39 rif_hvp1 40 hvp1_c 41 hvp1_d 42 rif_hvp0 43 hvp0_d 44 hvout_d 45 hvm0_d 46 hvm1_d 47 rif_hvm0 48 dgnd 49 dvdd 50 in1_d 51 in2_d 52 in3_d 53 vddp 54 gnd_pwr_1 55 xdcr_d 56 lvout_d 57 lvout_a 58 xdcr_a 59 gnd_pwr 60 vddm 61 in3_a 62 in2_a 63 in1_a 64 en table 1. pinout configuration table (continued) pin number pin name
AN3240 sthv748 block diagram and truth table doc id 17689 rev 1 7/32 2 sthv748 block diagram and truth table figure 1. sthv748 single channel block diagram table 2. sthv748 truth table global per channel state thsd in4 in3 in2 in1 1 x x 0 0 clamp 10001 hvm0 10010 hvp0 1x011 hvr_sw 10101 hvm1 10110 hvp1 10111 hz 11111 hvr_sw 11001max hvm0 & hvm1 1 1 0 1 0 max hvp0 & hvp1 11101 cw hvm1
sthv748 block diagram and truth table AN3240 8/32 doc id 17689 rev 1 11110 cw hvp1 0xxxx hz table 2. sthv748 truth table (continued) global per channel state thsd in4 in3 in2 in1
AN3240 sthv748 pcb demo description doc id 17689 rev 1 9/32 3 sthv748 pcb demo description the sthv748 pcb demo can drive four transducers as 4-channel transmitters/receivers for ultrasound and other applications. the demo board consists of one sthv748 in a 64-lead 9x9x1 mm qfn package. the sthv748 can deliver up to a 2.0 a source and sink current to a capacitive transducer. it is designed for medical ultrasound imaging and ultrasound material ndt applications. the sthv748 output waveforms can be displayed directly for each channel ch a/b/c/d using an oscilloscope by connecting the scope probe to the j1, j2, j3, and j4 jumpers, moreover, the user can select whether or not to connect the onboard equivalent load, a 300 pf 200 v capacitor paralleled with a 100 , 2 w resistor (or alternatively, 200 //50 pf - 200 //250 pf - no-load). a coaxial cable can al so be used to easily connect the user transducer. in1/2/3/4, for each channel available in ic, is controlled via the 13 pins of the c1 (conn1) head connector on the board (34 pins). the main issues in this pcb design are the capacitance values, to ensure good filtering and an effective decoupling between the low voltage inputs (in1, in2, in3, in4, and en for each channel) and the hv switching signals (xdcr, hvout, etc.,) which is ensured by the layer separation used.
AN3240 pcb demo description doc id 17689 rev 1 10/32 4 pcb demo description figure 2. pcb demo schematic !-v
AN3240 pcb demo description doc id 17689 rev 1 11/32 4.0.1 capacitances and resistances list table 3. capacitances and resistances list name type value class c2chd smc0805 250 pf 100 v c3 smc1206 0.22 f 100 v c4 smc1206 0.22 f 100 v c5 smc1206 0.22 f 100 v c6 smc1206 0.22 f 100 v c7 smc1206 0.22 f 100 v c8 smc1206 0.22 f 100 v c9 smc1206 0.22 f 100 v clva smc0805 20 pf lv clvb smc0805 20 pf lv clvc smc0805 20 pf lv clvd smc0805 20 pf lv cm1 smc0603 3.5 nf lv cm2 smc0603 3.5 nf lv cm3 smc0603 3.5 nf lv cm4 smc0603 3.5 nf lv cp1 smc0603 20 nf lv cp2 smc0603 20 nf lv cp3 smc0603 20 nf lv cp4 smc0603 20 nf lv cs1 smc1206 0.22 f 100 v r1 sm0805 10 k lv r10 sm2010 50 250 mw r11 sm2010 50 250 mw r12 sm2010 50 250 mw r13 sm0805 75 lv (1) r14 sm0805 75 lv r15 sm0805 75 lv r16 sm0805 75 lv r1cha sm2512 200 2 w r1chb sm2512 200 2 w r1chc sm2512 200 2 w r1chd sm2512 200 2 w
pcb demo description AN3240 12/32 doc id 17689 rev 1 r2 sm0805 10 k lv r2cha sm2512 200 2 w r2chb sm2512 200 2 w r2chc sm2512 200 2 w r2chd sm2512 200 2 w r3 sm2010 50 250 mw r4 sm2010 50 250 mw r5 sm2010 50 250 mw r6 sm2010 50 250 mw r7 sm2010 50 250 mw r8 sm2010 50 250 mw r9 sm2010 50 250 mw rlva sm0805 200 lv rlvb sm0805 200 lv rlvc sm0805 200 lv rlvd sm0805 200 lv c1 smc1206 0.22 f 100 v c10 smc1206 0.22 f 100 v c11 smc1206 0.22 f 100 v c12 smc1206 0.22 f 100 v c13 smc1206 0.22 f 100 v c14 smc1206 0.22 f 100 v c15 smc1206 0.22 f 100 v c16 smc1206 0.22 f 100 v c17 smc0603 0.22 f lv c18 smc0603 0.22 f lv c19 smc0603 0.22 f lv c1cha smc0805 50 pf 100 v c1chb smc0805 50 pf 100 v c1chc smc0805 50 pf 100 v c1chd smc0805 50 pf 100 v c2 smc1206 0.22 f 100 v c20 smc0603 0.22 f lv c21 smc0603 0.22 f lv c22 smcvf 22 f 100 v table 3. capacitances and resistances list (continued) name type value class
AN3240 pcb demo description doc id 17689 rev 1 13/32 figure 3. pcb top layout figure 4. c1 (conn1) head connector description c23 smcvf 22 f 100 v c24 smcvf 22 f 100 v c25 smcvf 22 f 100 v c26 smcvc 22 f 16 v c27 smcvc 22 f 16 v c28 smcvc 22 f 16 v c2cha smc0805 250 pf 100 v c2chb smc0805 250 pf 100 v c2chc smc0805 250 pf 100 v 1. lv stands for low voltage class table 3. capacitances and resistances list (continued) name type value class
pcb demo description AN3240 14/32 doc id 17689 rev 1 figure 5. pcb demo image table 4. c1 head connector pin vs sthv748 pinout channel cn1-pin (head connector) sthv748 pin name sthv748 pin number a 31 in1_a 63 33 in2_a 62 14 in3_a 61 c 34 in1_c 31 23 in2_c 30 17 in3_c 29 b 9in1_b18 13 in2_b 19 15 in3_b 20 d 1 in1_d 50 5 in2_d 51 19 in3_d 52 all channel 26 in4 17
AN3240 operating supply conditions doc id 17689 rev 1 15/32 5 operating supply conditions warning: the high voltage pins must be hvp0 hvp1 and hvm1 hvm0 table 5. dc working supply conditions operating supply voltages symbol parameter min typ max value vddp positive supply voltage 2.7 3 3.6 v vddm negative supply voltage -2.7 -3 -3.6 v vdd positive logic voltage 2.4 3 min(3.6,vddp+0.3) v hvp0 tx0 high voltage positive supply 95 v hvp1 tx1 high voltage positive supply 95 v hvm0 tx0 high voltage negative supply -95 v hvm1 tx1 high voltage negative supply -95 v table 6. current consumption in cw mode, @ 5 mhz, hvp/m1=5 v, no-load current consumption symbol parameter value i vddp positive supply current 8.6 ma i vddm negative supply current 13.5 ma i dvdd positive logic current 0.11 ma i hvp1 tx1 high voltage positive supply current 14.5 ma i hvm1 tx1 high voltage negative supply current 11 ma table 7. power-up sequence power up sequence 1 vddp 2vddm or vdd 3 vdd or vddm 4hvm0 5 hvp0
operating supply conditions AN3240 16/32 doc id 17689 rev 1 note: vdd: logic voltage, 0 to 3 v (b5 conn.) vddp: positive supply voltage 0 to 3 v (b6 conn.) vddm :negative supply voltage -3 v to 0 (b7 conn.) hvm0: tx0 high voltage negative supply, (b3 conn.) hvp0:tx0 high voltage positive supply, (b1 conn.) hvm1:tx1 high voltage negative supply, (b4 conn.) hvp1:tx1 high voltage positive supply, (b2 conn.) 5.1 load selection it is possible to select the fo llowing load configuration for ea ch channel (cha/b/c/d) using j1, j2, j3, and j4: 100 // 300 pf 200 // 50 pf 200 // 250 pf no-load figure 6. load configuration schematic 6 hvm1 or hvp1 7 hvp1 or hvm1 table 7. power-up sequence (continued) power up sequence
AN3240 operating supply conditions doc id 17689 rev 1 17/32 5.2 fixed sthv748 pins on pcb demo in order to clarify some special pin behavior, a short explanation is given: en allows the minimizing of the power consumption. if en=0, the self-voltage reference is not supplied. by supplying the reference externally, the total power consumption is reduced. thsd is a thermal flag. the output stage of the thsd pin is a nch-mos open-drain, so it is necessary to connect the external pull-up resistance (r2 10 k ) to the positive low-voltage supply (see figure 2 ). if the internal temperature surpasses 160 c, thsd goes down and puts all the channels into hz state. by externally forcing thsd to a positive low-voltage supply, the thermal protection is disabled. d_ctr can be used to optimize 2nd hd performance by tuning the fall propagation delay (tdf - see the datasheet, sthv748; 5-level, 90 v, 2 a high speed pulser with four independent channels ). if d_ctr is equal to ground, tdf has the no minal value. if d_ctr is being varied from 2 v to 4.2 v, tdf can be changed from -1 ns to +600 ps, with respect to the nominal value. exposed-pad is internally connected to the subs trate. it can be floating or connected to a 100 v capacitance toward ground, in order to reduce noise during the receiving phase. the fixed configuration of the pcb application pins described is given in ta bl e 8 . table 8. special pin connections special pins on the pcb demo name description status on board en 64-pin enable pin with en=1, the ic internally generates the reference voltages on ref_hvp1/0 (7, 10, 39, 42-pin) and ref_hvm1/0 (2, 15, 34, 47-pin). these voltages are set vddp below hvp and vddp above hvm, respectively: ref_hvm# = hvm# + vddp ref_hvp# = hvp# - vddp when en=0, it is required that an external voltage is applied to ref_hvm# and ref_hvp# pins (see the sthv748 datasheet). active ? forced to 3 v through r1=10 k thsd 32-pin thermal shutdown pin active ? forced to 3 v through r2=10 k . the user can monitor the thsd status on tp1 (test point) d_ctr 16-pin delay control pin not active ? forced directly to ground exposed-pad substrate not active ? connected to ground through cs1=0.22 f
demonstration kit composition AN3240 18/32 doc id 17689 rev 1 6 demonstration kit composition there are essentially 3 methods to drive the sthv748 demo board, for each of them the user must connect a custom pcb adapter, via the c1 connector, to drive the ic pulser. 6.1 method 1 (flexible - based on bnc pcb adapter) in this case, the demo board, described in section 3 , is being connected up, via the c1 connector, to a custom pcb adapter with 8 bnc connectors. a couple of bnc are dedicated to in1 and in2 for each channel and usable for the external waveforms generator. in addition, 2 switches are dedicated to connecting in3 and in4 to 0v or vdd, in accordance with the truth table (see ta b l e 2 and figure 8 ). the composition of the demonstration kit is shown in figure 7 and 9 . figure 7. demonstration kit composition (pcb demo plus bnc pcb adapter) figure 8. pcb adapter image, top layout and top schematic !-v
AN3240 demonstration kit composition doc id 17689 rev 1 19/32 figure 9. demonstration kit system image 6.1.1 how to drive th e sthv748 for method 1 the user simply needs a clock generator (or an avg) in a way to drive pins in1 and in2 with a proper time pulse width, consequently, it is possible to fix a truth table state for xdcr using the 2 switches on the pcb adapter connected to vdd supply or gnd, which control in3 and in4. see the example diagram below ( figure 10 ): figure 10. inputs set of generators for pw mode (4 cycles - tx0 pulser chx) note: the dc generators, shown in figure 10 , are symbolic, in the truth table the vdd voltage is selected by the user through the j9 jumper on the pcb demo, which supplies the switches on the pcb adapter. in figure 10 , an example of a tx0 pulser in pw mode setting, is described. it is possible to pass easily to a tx1 pulser pw mode in the same example shown in figure 10 , in fact, it is enough to change the in3 status, through the switch on the pcb adapter, from 0 to vdd (in4=0 - not touched). this simple commutation on switch in3 allows 4 cycles for the tx1 pulser. !-v &+ &+ ,1 ,1 9'&jhqhudwru 9'&jhqhudwru ,1 ,1 ,1 ,1 ;'&5 +93 +90 7 7bfo 9 ([whuqdovhwrijhqhuhwruv iru3:prghf\fohv 9
demonstration kit composition AN3240 20/32 doc id 17689 rev 1 in the same manner the user fixes the other states, such as cw mode (in3=vdd, in4=vdd) or maxhv0 and hv1 mode (in3=0, in4=vdd), by just changing the switch position on the pcb adapter. the status of switches in3 and in4 is being monitored by two smd led diodes, for each switch, on the pcb adapter (d1 red and d2 green close to in3, d3 red and d4 green close to in4). as shown in figure 11 , the red light near the switch indicates state 1 (when vdd voltage is active, the switch button is in the left position) while the green light indicates state 0 (when 0 is active, the switch button is in the right position). figure 11. diodes led status on the pcb adapter which indicates in4=1 and in3=0 when the switch button is in the center position the status is on hz. 6.2 method 2 (use of the mother board based on the stm3210e- eval) the demo kit, in this solution, is made up of a motherboard based on the stm3210e-eval plus the pcb demo mentioned into section 3 (see figure 12 ). it doesn't require any manual driving because the stm3210e-eval microcontroller is programmed to deliver some demo patterns. figure 12. demonstration kit based on the stm3210e-eval system
AN3240 demonstration kit composition doc id 17689 rev 1 21/32 figure 13. demonstration kit based on the stm3210e-eval system image 6.2.1 motherboard communication setting the stm3210e-eval system communicates with the pcb demo through the c1 connector, following the signal setting represented in figure 14 . figure 14. stm3210e-eval pin connection table 9. stm3210e-eval pin configuration table channel gates (motherboard side) cn1-pin (motherboard side) sthv748 pin name sthv748 pin number a pa 0 3 1 i n 1 _ a 6 3 pa 1 3 3 i n 2 _ a 6 2 pc0 14 in3_a 61
demonstration kit composition AN3240 22/32 doc id 17689 rev 1 6.2.2 motherboard driving per formance for the pcb demo the stm3210e-eval demonstration board (motherboard) has been programmed to show the sthv748?s main functions. in particular, the firmware installed into the internal memory allows the pcb demo to be driven in a way that the sthv748 pulser performs an example of three work conditions: pulse wave mode (pw), (see figure 15 ) continuous wave mode (cw), (see figure 16 ) pulse cancellation mode (pc), (see figure 17 ) figure 15. pw mode functions c pa 2 3 4 i n 1 _ c 3 1 pa 3 2 3 i n 2 _ c 3 0 pc2 17 in3_c 29 b pb0 9 in1_b 18 pb1 13 in2_b 19 pc1 15 in3_b 20 d pa 6 1 i n 1 _ d 5 0 pa 7 5 i n 2 _ d 5 1 pc3 19 in3_d 52 all channel pc5 26 in4 17 table 9. stm3210e-eval pin configuration table (continued) channel gates (motherboard side) cn1-pin (motherboard side) sthv748 pin name sthv748 pin number
AN3240 demonstration kit composition doc id 17689 rev 1 23/32 figure 16. cw mode functions figure 17. pc mode functions figure 18. supply connection for demonstration kit with the stm3210e-eval
demonstration kit composition AN3240 24/32 doc id 17689 rev 1 6.2.3 turn on demo system 1. first step: connect all supplies as indicated in figure 18 based on the following power up sequence (see ta b l e 7 ): ? 1st usb connection (power supply for the motherboard and digital supply dvdd for the sthv748) ? 2nd analog low voltage connections for the daughter board (vddp=+3 v, vddm=-3 v) ? 3rd high voltage power supply connections for the daughter board (hvp0/1=+90 v, hvm0/1=-90 v) 2. second step: ? after the power supply connections, the onboard display appears as follows ( figure 19 ): figure 19. main menu on stm3210e-eval display 3. third step: ? by moving the ?joystick? key up and down the user can select one of the three modes available (pw, cw or pc mode) in the ?main menu?. when the user has selected a mode the joystick key must be pressed to descend into the mode menu (see figure 20 ).
AN3240 demonstration kit composition doc id 17689 rev 1 25/32 figure 20. main menu selection on the stm3210e-eval display ? assuming that the user has descended into the ?continuous mode? menu, it is possible to manage the pw mode. in fact, by moving the joystick key ?generate signals? can be selected (see figure 21 ). the joystick key must now be pressed to run the pw mode function. if the user wants to change the choice, it is enough to select and press ?return? to go to the main menu and choose another function, such as cw or pc. figure 21. example of ?continuous mode? selection on the stm3210e-eval display ? after having run the mode, the user can stop the ?continuous mode? and return to the previous menu just by pressing the joystick key on the board (see figure 22 ).
demonstration kit composition AN3240 26/32 doc id 17689 rev 1 figure 22. exit the mode selected on the stm3210e-eval display 6.2.4 turn off demo system 4. fourth step demo off can be executed by following the power down sequence: ? 1st high voltage power off (hvp0/1=+90 v, hvm0/1=-90 v) ? 2nd low voltage power off (vddp=+3 v, vddm=-3 v) ? 3rd unplug the usb connection (power off supply for the motherboard) figure 23. reset key on the stm3210e-eval
AN3240 demonstration kit composition doc id 17689 rev 1 27/32 6.2.5 acquisition exampl es of pw, cw and pc mode figure 24. pw mode (hvp0=60 v hvm0=-60 v 100 //300 pf) figure 25. cw mode hvp1=5 v hvm1=-5 v 100 //300 pf
demonstration kit composition AN3240 28/32 doc id 17689 rev 1 figure 26. cw mode hvp1=10 v hvm1=-10 v 100 //300 pf figure 27. pc mode hvp0=60 v hvm0=-60 v 100 //300 pf
AN3240 demonstration kit composition doc id 17689 rev 1 29/32 6.3 method 3 (labview interf ace - use of the hsdio pcb connector) the user, who has the poss ibility of using labview e quipment, as shown in figure 28 , can evaluate the sthv748 detailed functions. figure 28. labview equipment used to develop the sthv749 in this case, customized software has been developed (sthv748.vi) to manage all channels in such a way as to test them in several working conditions (see the pc display - figure 29 ). in the case of the user having the labview chain, previously mentioned, it's possible to connect the pcb demo to the labview system through a pcb connector shown in figure 30 .
demonstration kit composition AN3240 30/32 doc id 17689 rev 1 figure 29. sthv748 labview pc control panel figure 30. sthv748 demo system for labview evaluation
AN3240 revision history doc id 17689 rev 1 31/32 7 revision history table 10. document revision history date revision changes 21-dec-2010 1 initial release.
AN3240 32/32 doc id 17689 rev 1 please read carefully: information in this document is provided solely in connection with st products. stmicroelectronics nv and its subsidiaries (?st ?) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described he rein at any time, without notice. all st products are sold pursuant to st?s terms and conditions of sale. purchasers are solely responsible for the choice, selection and use of the st products and services described herein, and st as sumes no liability whatsoever relating to the choice, selection or use of the st products and services described herein. no license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. i f any part of this document refers to any third party products or services it shall not be deemed a license grant by st for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoev er of such third party products or services or any intellectual property contained therein. unless otherwise set forth in st?s terms and conditions of sale st disclaims any express or implied warranty with respect to the use and/or sale of st products including without limitation implied warranties of merchantability, fitness for a parti cular purpose (and their equivalents under the laws of any jurisdiction), or infringement of any patent, copyright or other intellectual property right. unless expressly approved in writing by an authorized st representative, st products are not recommended, authorized or warranted for use in milita ry, air craft, space, life saving, or life sustaining applications, nor in products or systems where failure or malfunction may result in personal injury, death, or severe property or environmental damage. st products which are not specified as "automotive grade" may only be used in automotive applications at user?s own risk. resale of st products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by st for the st product or service described herein and shall not create or extend in any manner whatsoev er, any liability of st. st and the st logo are trademarks or registered trademarks of st in various countries. information in this document supersedes and replaces all information previously supplied. the st logo is a registered trademark of stmicroelectronics. all other names are the property of their respective owners. ? 2010 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech republic - finland - france - germany - hong kong - india - israel - ital y - japan - malaysia - malta - morocco - philippines - singapore - spain - sweden - switzerland - united kingdom - united states of america www.st.com

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