User Manual - ErSt Electronic GmbH
Contents
1. inverse diode and a transient suppressor diode in conjunction with a fuse protect the module from inverted supply voltages and voltage transients The output voltages are generated with switching regulators working with 500kHz operating frequency and having an output current capability of 4A They are thermally and short circuit protected All output voltages are configureable with jumpers Four settings 5V 3 3V 2 5V and 1 8V resp 1 5V are fix a fifth setting is adjustable with a trim potentiometer The three output voltages are available on header and power connectors Each of the power connectors allows the connection of four wires two for ground and two for output power Each of the eight reference voltages may be selected with DIP switches among six fixed voltages 0 75V 0 8V 1 0V 1 125V 1 32V and 1 5V The reference voltages are also routed to the header connectors buffered with a source follower Four LEDs show the state of the three output voltages and the power supply The three LEDs which correspond to the three output voltages are driven by operational amplifiers connected to the voltage feedback input of the switching regulators The reason for this is that the output voltage may be well below the minimal forward voltage of an LED ErSt Electronic GmbH Z richstrasse 111 Phone 41 1 980 61 44 CH 8123 Ebmatingen Fax 41 1 980 61 30 Internet http www erst ch Power Module PWR3 User Manual 8 12 3 Technical Informatio2. l VREF6 50 l VREF7 1to12 VCCINT ste 13to38 _ GND 39 to 50 VCCO Table 3 Pin numbers and signals on the header connectors 3 3 Reference Voltages Figure 4 shows the circuit which generates the reference voltages Eight reference voltages may be selected among six fixed voltages 0 75V 0 8V 1 0V 1 125V 1 32V und 1 5V by means of DIP switches All reference voltages are derived with resistive voltage dividers from a 2 5V reference Note Only one switch of each six position switch should be in the on position If two or more switches are in the on position the voltage dividers are connected in parallel and the reference voltage assumes a wrong value The voltage dividers are buffered with an OpAmp source follower The output current of each reference voltage VREFO to VREF7 may be up to ca 10mA ErSt Electronic GmbH Z richstrasse 111 Phone 41 1 980 61 44 CH 8123 Ebmatingen Fax 41 1 980 61 30 Internet http www erst ch Power Module PWR3 User Manual 12 12 Ye VPWR R59 IS10E 1 50V 1 32V 1 125V 100V 0 80V 0 75V ls u R53 TIRSA R51 FIRSS Tesa R66 Tess R13 Tesi R32 IRSS 0 47uF 1 5k 56k 2 2k 22k 5 1k 5 6k 13 3K 5 1k I56x 5 6k 56x D10 385M 2 7 AM5 T 1 ie T R45 R46 R47 R48 R49 R50 gt 2 2k 2 2k 2 2k 2 2k rem 2 2k V R68 Sr vg J swi M UIB 1 i2 5 LM324
3. Power Module PWR3 User Manual Power Module PWR3 User Manual Fftave 1 Fhin 41 1 980 61 44 41 1 980 61 30 ErSt Electronic GmbH Z richstrasse 111 Phone CH 8123 Ebmatingen Fax Internet http www erst ch PWR3 User Manual 2 12 Manual Version PWR3 Version 1 0 July 1999 This manual describes the technical properties and the usage of the following products Power Module PWR3 Version 1 0 July 1999 ErSt Electronic GmbH 1999 The ErSt Electronic GmbH reserves the right to make changes and improvements of the product without notice Important Note The power module PWR has been designed and tested exclusively for the usage as a development tool In particular strong electromagnetic radiation may be produced The ErSt Electronic GmbH does not undertake any liability for damages which may result from an improper use of this product ErSt Electronic GmbH Z richstrasse 111 Phone 41 1 980 61 44 CH 8123 Ebmatingen Fax 41 1 980 61 30 Internet http www erst ch PWR3 User Manual 3 12 Contents I Irtroduction anna 4 2 MOORE een 5 Zeki SRY FOAUUP OS stcscscescsssceseceasoanessoaceicecssrenedsuecessennceseesesesicanasosnvesesseess 5 2 2 Function Description csccsccscsscssscccesssssssecsscsssseseesesesceseesees 7 3 Technical Information ccccsscccsssscssssecesnccssscccssccessscccssscesessees 8 3 1 Input Volta Be ss cccsscssscsescscscccsdssvecscecsvocescesvesdconssesesesssecesee
4. V 3 3V 5V Uvar Switching regulator for VCCO 1 5V 2 5V 3 3V 5V Uvar Switching regulator for VCCOPT 1 8V 2 5V 3 3V 5V Uvar Output voltages selectable with jumper Uvar is user adjustable in the range 1 3 5 2V Switching regulators are protected against short circuits and thermal overload Max 4A load current for all output voltages All output voltages available on header connectors and power connectors Output power sufficient for up to three board modules 6 reference voltages 0 75V 0 8V 1V 1 125V 1 32V and 1 5V for 8 I O banks selectable with DIP switch matrix e May be stacked with EVALXCV e Board size 86mm x 150mm gt gt 1 8V 2 5V 3 3V 5V U 1 8V 2 5V 3 3V 5V U 1 52 58 2V 5VIU _ PIERS OT LEH Figure 1 Block diagram of the power module PWR3 ErSt Electronic GmbH Z richstrasse 111 Phone 41 1 980 61 44 CH 8123 Ebmatingen Fax 41 1 980 61 30 Internet http www erst ch Power Module PWR3 User Manual 6 12 Absolute Maximum Ratings Symbol Description Unit Vin Input voltage 0 3 14 V lourvecint _ Output current for VCCINT 7 4 A loutveco _ Output current for VCCO 4 A loutvecopT TsHortout Duration of output voltage short circuit Continuous against ground TsHortrer Duration of reference voltage short circuit against ground Ambient temperature Note 1 The input is protected with an inverse diode and a transient suppressor diod
5. ation is proportional to the square of the supply voltage The commonly used technologies work with 5V and 3 3V where the structure size goes down to 0 35um Already today 0 25um processes are state of the art and in the future the semiconductor manufacturers will be able to work with 0 18um and 0 13um structure sizes The supply voltages will follow this trend and reach 2 5V 1 8V and 1 3V Integrated circuits of different technologies with different supply voltages must work together in the same system The implication of this is that a single device can not longer work with a single supply voltage Internal supplies and output driver supplies are separate from each other The power module PWR3 generates three regulated voltages in the range of 1 3 to 5V to ease the use of future digital integrated circuits In addition eight reference voltages for the support of multistandard I Os are provided Information about new products and new developments can be found on the ErSt Electronic Website http www erst ch If you have questions you may write to the following email address info erst ch We will answer as soon as possible usually within one or two days ErSt Electronic GmbH Z richstrasse 111 Phone 41 1 980 61 44 CH 8123 Ebmatingen Fax 41 1 980 61 30 Internet http www erst ch Power Module PWR3 User Manual 5 12 2 Overview D b Key Features Input power supply range 6 14V Switching regulator for VCCINT 1 8V 2 5
6. e The inverse diode starts to conduct at voltages lower than 0 3V the suppressor diode starts to conduct for voltages above 14V zum Continuous C Note 2 This is the maximal output current of the switching regulator The regulator circuit is thermally and short circuits protected Note 3 One output at a time Note 4 The maximal possible output current is reduced at high ambient temperatures Recommended Operating Conditions re Description Unit Input voltage 6 12 v nr foen ereen 3 a loutveco Output current for VCCO 3 A 3 lourvccort Output current for VCCOPT loutrer Output current of a reference voltage 0 mA Tame Ambient temperature 0 40 C Note 1 Continuous operation without additional cooling at 25 C Typical Performance Vin 10V Ta 25 C unless otherwise noted Condition lout 4A Description Quiscent current Efficiency Vour 2 5V lour 4A Efficiency Vout 3 3V lout 4A Efficienc Vout 5V lour 4A ErSt Electronic GmbH Z richstrasse 111 Phone 41 1 980 61 44 CH 8123 Ebmatingen Fax 41 1 980 61 30 Internet http www erst ch Power Module PWR3 User Manual 7 12 2 2 Function Description The power module PWR3 generates three regulated output voltages and eight reference voltages from a single unregulated power supply The input supply voltage can be in the range from 6V to 14V An
7. ir 7 TT EP 7_YREFO 3 TO _6 hi 7 y LT 5 6 TT vpwr Banko ____ to other banks Figure 4 Reference voltage generation 3 4 Indicator LEDs The three ouput voltages and the input voltage are equipped with indicator LEDs The indicator LEDs of the output voltages are placed next to the appropriate power connector As already mentioned in the function description these LEDs are driven by an operational amplifier connected to the feedback voltage input of the switching regulator The indicator LED of the input voltage is placed between the fuse and the transient suppressor diode ErSt Electronic GmbH Z richstrasse 111 Phone 41 1980 61 44 CH 8123 Ebmatingen Fax 41 1 980 61 30 Internet _ http www erst ch
8. n Figure 2 shows an overview of the placement of key components like input and output connectors fuse output voltage selection jumpers with adjustment potentiometers and DIP switches for reference voltage selection A detailed description of each of these items is given in the following sections Qa oa A Qa zz zz zz 66 66 66 Oleeoe Memo oe0e O o m O u o o E oO B sel 8 2 o g wie 8 O gt w gt O snipe S cc gt na O gt ASS 05 O NEE O Q NS Oo O gt o gt BBBSRS BBBERB ji he fea aro ei re Seas Sorten a nl N ise klet letl Boe 8 LU Jou foo fst jojo w fou foo Ist Jun oo o um a gt gt N Ko u Le mllefe meek a 7 0233 9 a a i5 Or NOW 5 Ww LL Eh See LEID o gt gt z 2 f b 2 O l lalol holo il la holo zo x oO gt gt O T So is ise y ns O S Nees 2 a IC a g o gt E O snipe O5 ON Z O oo 7 en Oo S 3 Q SI Dar 3 F iis gt gt 9 o aag 7 D 13 O 28 O Figure 2 Component placement overview ErSt Electronic GmbH Z richstrasse 111 Phone 41 1 980 61 44 CH 8123 Ebmatingen Fax 41 1 980 61 30 Internet http www erst ch Power Module PWR3 User Manual 912 3 1 Input Voltage The input voltage of the power module may be choosen in the range of 6V to 14V and is connected to a two pole power connector An inverse diode and a transie
9. nt suppressor diode in conjunction with a fuse protect the module Caution The fuse protects the module only in the case where the power supply can deliver enough current to blow the fuse immediately Normally inverse voltages or over voltages may be applied only for short durations to avoid damage to the module Due to the function principle of switching regulators the input current is higher at low input voltages than at higher input voltages It may be necessary to adjust the value of the fuse for certain operating conditions Inverse Voltage Protection VPWR Overvoltage Protection D13 30BQ040 Figure 3 Input protection circuit 3 2 Output Voltages The three ouput voltages are denoted with VCCINT VCCO and VCCOPT They are generated with switching regulators working at 500kHz Each of the regulators is capable of delivering up to 4A and is thermally and short circuit protected The value of each of the output voltages is selectable by a jumper Table 1 shows the jumper settings and the resulting output voltage values Only one jumper must be set at a time During operation the jumper settings may be changed without danger since the output voltage falls to 1 2V when all jumpers are removed ErSt Electronic GmbH Z richstrasse 111 Phone 41 1 980 61 44 CH 8123 Ebmatingen Fax 41 1 980 61 30 Internet http www erst ch Power Module PWR3 User Manual 10 12 Caution Never insert more than one jumper at
10. sseaesescsscsees 9 3 2 Output Voltages s scvsccscscccsossconssoosseoscsoscesssessseessoasseussoesstescsoocesossoos 9 3 3 Reference VOltALES 0 iscesssesssesesesceessvedconsvsesseuessedsevonsessrsoosescoeense 11 3 4 Indicator LEDS wie cisccscccsecssscscecsceossessseacseessoessecessossevosevosesdooesoeesbee 12 Figures Figure 1 Block diagram of the power module PWR3 uur2uursernnnennennes seen 5 Figure 2 Component placement overview ueeserseenseesnnennnnnnnennennnnsnnesnnnsnnn sen nme 8 Figure 3 Input protection circuit ceserseesseesseennennesnnesnnesnnnsnnnsnensnennennnennnennnnnnnnnnnen 9 Figure 4 Reference voltage generation uueseerseenseennnennesnnesnnesnnesensnensnennennnennnenn 12 Tables Table 1 Configuration of the output voltages uu22n222422n4rnnennnennennnennnennnennnennnen 10 Table 2 Potentiometer for variable setting u 2u22u022uennennnennennnennennnennne nenn 10 Table 3 Pin numbers and signals on the header connectors nenneenneenneenne en 11 ErSt Electronic GmbH Z richstrasse 111 Phone 41 1 980 61 44 CH 8123 Ebmatingen Fax 41 1 980 61 30 Internet http www erst ch Power Module PWR3 User Manual 412 1 Introduction The ongoing miniaturisation of integrated circuits leads to lower supply voltages This is due to two reasons First the dielectric streng of the insulator layers is limited Second the power dissipation can be minimised drastically dynamic power dissip
11. the same time since the output voltage may then rise well above 5V limited by the input voltage level only Jumper VCCINT Jumper _VCCO Jumper _VCCOPT J6 5V Jii J7 3 3V Ji2 __3 3V J2 33V J8 25V J83 25V J 2 5V 18V sta iw se 18V J9 __310 __variade __J15___variabe __J5 __ variable Table 1 Configuration of the output voltages In the variable setting the output voltages are adjustable with a trim potentiometer see Table 2 in the range from 1 3V to 5 2V Note The factory settings of the variable output voltages is undefined and must be adjusted to a reasonable value by the user before connecting anything to the output Potentiometer Output voltage R19 VCCINT R18 VCCO R17 VCCOPT Table 2 Potentiometer for variable setting The output voltages are routed to power connectors and to header connectors The naming and positioning of the signals on the header connectors corresponds with according connectors on board modules Table 3 shows the pins and signals on the header connectors Also refer to Figure 2 ErSt Electronic GmbH Z richstrasse 111 Phone 41 1 980 61 44 CH 8123 Ebmatingen Fax 41 1 980 61 30 Internet http www erst ch Power Module PWR3 User Manual 11 12 Connector Pin Number Signal Name 1to12 ____VCCOPT 13to25 GND 26 t042 Reserved 43 l VREFO 44 l VREF1 l ST1 45 VREF2 46 l VREF3 47 l VREF4 48 l VREF5 l 49
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