Basic Characteristics Data
Contents
1. 48 6 Implementation Mounting Method 5 VIN VOUT 6 1 Mounting method gt o MT he unit can be mounted in any direction When two or more pow RC o TRM er supplies are used side by side position them with proper inter o S vals to allow enough air ventilation The temperature around each VIN O VOUT power supply should not exceed the temperature range shown in derating curve d CHS300 MAvoid placing the DC input line pattern layout underneath the unit It will increase the line conducted noise Make sure to leave an B 41 ample distance between the line pattern layout and the unit Also avoid placing the DC output line pattern underneath the unit be cause it may increase the output noise Lay out the pattern away VIN o VOUT from the unit S Avoid placing the signal line pattern layout underneath the unit be RC i TRM o cause the power supply might become unstable o S Lay out the pattern away from the unit VIN o VOUT Avoid placing pattern layout in hatched area shown in Fig 6 1 to insulate between pattern and power supply 7 5 e CHS400 Dimensions in mm 1 EMIN l i i lv Fig 6 1 Prohibition area of pattern layout top view o RC t 2 TRM ER pm 6 2 Automatic Mounting CHS series option S MiTo mount CHS series automatically use the inductor area near the 2 1 10 output pin as an adsorption point2. 100 80 Option B e EH m Option BC cop uo 2 Others e p nang nooo nnnn S d El WN o 40 H sp UUUU Uuuu o uuu Es 20 Temperature measurement location 0 Fig 8 2 5 Temperature measurement location CHS400 40 20 0 20 40 60 80 100 120 95 Temperature of measurement location C Fig 8 1 Derating curve nnnm onan UUUU nnnn k fon TUUU TUTT ponon UUUU noon nann UUUU d UUUU nnnn UUUU UUUU Temperature measurement location Fig 8 2 6 Temperature measurement location CHS500 Temperature measurement location Fig 8 2 1 Temperature measurement location CHS60 CHS 25 CO EL Instruction Manual For option B which is used with the convection cooling forced air cooling or conduction cooling use the temperature measure ment location as shown in Fig 8 2 7 and Fig 8 2 8 Aluminum base plate Measurement point Fig 8 2 7 Measurement point CHS200 CHS300 option B and BC Aluminum base plate N Measurement point Fig 8 2 8 Measurement point CHS400 CHS500 option B WiShown the thermal curve with measuring as shown in Fig 8 3 Verify final design by actual temperature measurement Use the temperature measurement location as shown in Fig 8 2 1 to
3. 35 30 25 20 13 convection cooling 10 1m s 2m s 5 0 40 30 20 10 0 10 20 30 40 50 60 70 80 90 45 Ambient temperature C Fig 8 21 Load current vs ambient temperature CHS4004812H Vin 48V 40 35 30 25 20 CDconvection cooling 0 2m s 1m s 2m s 0 40 30 20 10 0 10 20 30 40 50 Ambient temperature C 60 70 80 90 Fig 8 22 Load current vs ambient temperature CHS5004812 Vin 48V CcO EL Instruction Manual 9 SMDtype optionS package information These are packed in a tray Fig 9 1 to Fig 9 2 Please order CHS6000 S or CHS80010 S for tray type pack aging Capacity of the tray is 15max In case of fractions the units are stored in numerical order 24 6 37 37 23 Q ap Y t 2 46 8 LS IP W IP W Jen E R FR gt gt AT SS gt NN TK oa E P p EN gt l ff
4. Fig 3 2 Reverse input voltage protection 3 2 Wiring output pin When the CHS series supplies the pulse current for the pulse load please install a capacitor Co between VOUT and VOUT pins Recommended capacitance of Co is shown in Table 3 2 3 3 Wf output current decreases rapidly output voltage rises transiently and the overvoltage protection circuit may operate In this case please install a capacitor Co Select a high frequency type capacitor Output ripple and startup waveform may be influenced by ESR ESL of the capacitor and the wiring impedance WMake sure that ripple current of Co is than its rating Table 3 2 Recommended capacitance Co CHS60 CHS80 CHS200 No Output voltage CHS60 CHS80 CHS200 1 3 3V 0 20 000uF 0 20 000uF 0 40 000uF 2 5V 0 10 000uF O 10 0004F 0 20 0004F 12V 0 2 200uF 0 1 000uF 0 2 200uF Table 3 3 Recommended capacitance Co CHS300 CHS400 CHS500 No Output voltage CHS300 CHS400 CHS500 1 5V 0 20 000uF 2 10V 0 2 200uF 0 4 000uF 3 12V 0 2 200uF 0 4 000uF 4 15V 0 2 200uF Ripple and Ripple Noise are measured as shown in the Fig 3 3 Cin is shown in Table 2 1 50mm Measuring board pM FVIN VOUT NI DC a m Cin ZZ Co Load Input RC di 22uF VIN VOUT y Oscilloscope H 1 5m500 BW 100MHz I Coaxial ca
5. When the number of units in parallel operation increases input current increase at the same time Adequate wiring design for in put circuitry is required such as circuit pattern wiring and current capacity for equipment Total number of units should be no more than 3 pieces Thick wire should be used for wiring between the power supply and load and line drop should be less than 0 3V Connect each input pin for the lowest possible impedance WWhen the number of the units in parallel operation increases inputcurrent increases Adequate wiring design for input circuitry such as circuit pattern wiring and current for equipment is re quired 1 onoo Vin Vout DC Fuse INPUT OAD l f Vin Vout pis o RC O 0 4 0o Vin Vout o Fuse Vin Vout Lo RC Fig 5 2 Examples of parallel operation 5 3 Redundancy operation Parallel operation is not possible MRedundancy operation is available by wiring as shown below h la Power Tr D gt Supply Load Power Supply Fig 5 3 Redundancy operation MEven a slight difference in output voltage can affect the balance between the values of I and l2 Please make sure that the value of la does not exceed the rated current of the power supply l3 the rated current value cO EL Instruction Manual
6. 15kO 33kQ 5kQ 4 12V 18kQ 68kQ 18kQ 33kQ 5 15V 22kQ 68kQ 22kQ 33kQ Bu Instruction Manual 2 To decrease output voltage By connecting the external resistor RD output voltage becomes adjustable to decrease The external resistor RD is calculated by the following equation 5 11 RD 10 22 kQ A A Vor Vop Vor Vor Rated output voltage V Von Output voltage needed to set up V VOUT S TRM RD S VOUT Fig 4 5 Connection to decrease output voltage 3 To increase output voltage BIBy connecting the external resistor RU output voltage becomes adjustable to increase The external resistor RU is calculated by the following equation 5 11 X Von X 14A 5 11 RU IESU A 10 22 kQ 1 225XA A A Vou Vor Vor Vor Rated output voltage V Vou Output voltage needed to set up V VOUT S RU TRM S VOUT Fig 4 6 Connection to increase output voltage CHS 21 cO EL Instruction Manual 4 Input voltage derating WWhen input voltage is 18 21 5V DC or 36 44VDC the output voltage adjustment range becomes as shown in Fig 4 7 120 SV ADJUSTMENT RANGE INPUT VOLTAGE V CHS30024 _ 120 _ 120 445 S 445 W W Q 110 9 110 105 105 5 100 5 100 Lu W 95 95 E E 5 90 E 90 4 q 80 2 80 o Ea i i oT i L p i 0 36 40 76 0 36 40 44 76 INPUT VOLTAGE V INPUT VOLTAG
7. provided by the end use equipment in accordance with the final build in condition Safety approved fuse must be externally installed on input side it Men measurement location Fig 8 2 2 Temperature measurement location CHS80 0000000 mT 0 8 Derating 7 Temperature measurement location Fig 8 2 3 Temperature measurement location CHS200 Mit is necessary to note thermal fatigue life by power cycle Please reduce the temperature fluctuation range as much as pos sible when the up and down of temperature are frequently gener E B ated g O o LS 8 1 CHS Derating o 9a O MUse with the convection cooling or the forced air cooling Make sure the temperatures at temperature measurement loca Temperature measurement location tions shown from Fig 8 2 1 to Fig 8 2 8 below are on or under the derating curve in Fig 8 1 Ambient temperature must be kept at 85 C or under Fig 8 2 4 Temperature measurement location CHS300
8. 10C Ty2 180 10 C Ty1 Ty2 120s max B 1 0 5 0 C s B Tp Max245C 10s max Tx 220 C or more 70s max C 1 0 5 0 C s Fig 6 3 Recommend Reflow Soldering Conditions e Notes to use option S WiSolder iron or other similar methods are not recommended solder ing method for option S because it may not be able to retain connection reliability between the PCB and the Pins Solder reflow is the acceptable mounting system for the option WOption S is not reusable product after soldered on any applica tion PCB CHS 24 6 4 Stress to the pins When too much stress is applied to the pins of the power supply the internal connection may be weakened As shown in Fig 6 4 avoid applying stress of more than 19 6N 2kgf to the pins horizontally and more than 39 2N 4kgf verti cally The pins are soldered on PWB internally Therefore do not pull or bend them with strong force Fix the unit on PCB using silicone rubber or fixing fittings to re duce the stress to the pins lt gt lt gt Less than V Less than Less than Less than 19 6N y 19 6N 19 6N Uu 19 6N Less than m Ed 39 2N option S Fig 6 4 Stress to the pins 6 5 Cleaning WWhen cleaning is necessary clean under the following conditions Method Varnishing ultrasonic wave and vapor Cleaning agents IPA Solvent type Total time 2 minutes or less WDo not apply
9. Fig 8 2 6 at 120 C or less __ PWB K 254m gt CHS Lo 3 7 CHS Top 5 LT a fS Measurement point for ambient temperature 12 7mm PAL N a tit 1111 Airflow Airflow 76mm Fig 8 3 Measuring method CHS 26 8 CDconvection cooling 0 2m s 6 1m s a 2m s 2 0 Load current A 3 40 30 20 10 0 10 20 30 40 50 60 70 80 90 Ambient temperature C Fig 8 4 Load current vs ambient temperature CHS60483R3 Vin 48V 6 CDconvection cooling 0 2m s 1m s 2m s Load current A O4o 30 20 10 0 10 20 30 40 50 60 70 80 90 Ambient temperature C Fig 8 5 Load current vs ambient temperature CHS604805 Vin 48V F lt 5 S 3 CDconvection cooling 0 2m s 8 2 1m s 2m s 040 30 20 10 0 10 20 30 40 50 60 70 80 90 Ambient temperature C Fig 8 6 Load current vs ambient temperature CHS604812 Vin 48V 30 25 20 convection cooling 0 2m s 10 1m s 2m s Load current A a 0 40 30 20 10 0 10 20 30 40 50 60 70 80 90 Ambient temperature C Fig 8 7 Load current vs amb
10. When the input voltage from a front end unit is supplied to multiple units install the normal blow type fuse in each unit Table 3 1 Recommended fuse Normal blow type Model CHS30024 Rated current 20A Model CHS6048 CHS8048 CHS20048 CHS30048 CHS40048 CHS50048 Rated current 5A 7A 15A 20A 30A 2 External capacitor on the input side Minstall an external capacitor Cin between VIN and VIN input pins for low line noise and for stable operation of the power sup ply Refer to Table 2 1 Ta 20 to 85 C Electrolytic or Ceramic capacitor Capacitance Ta 40 to 85 C Ceramic capacitor Cin is within 50mm for pins Make sure that ripple current of Cin is less than its rating 3 Recommendation for noise filter Wilnstall an external input filter as shown in Fig 3 1 in order to re duce conducted noise Cin is shown in Table 2 1 1mH VIN VOUT PL J DC UUU S a Zu RC ZHZ input 22uF 000 Cin E TUE Load VIN VOUT amp 0 068 4 F 0 068 4 F 0 033 4 F 0 033 u F jua 4 Fig 3 1 Recommended external input filter 4 Reverse input voltage protection MAvoid the reverse polarity input voltage It will damage the power supply It is possible to protect the unit from the reverse input voltage by installing an external diode as shown in Fig 3 2 VIN E DC IN VIN
11. gt Zr X p gt na 2 jin J l gt DC 126 J KE E lt Bt U Dimensions in mm Material Conductive PS AR a i os B UT Fig 9 1 Delivery package information CHS60 323 62X4 48 55 248 ES ES Dimensions in mm Material Conductive PS Fig 9 2 Delivery package information CHS80 CHS 29
12. 0 90 Fig 8 16 Load current vs ambient temperature CHS3004810 Vin 48V Ambient temperature C Load current A 28 24 20 x S 16 E m 1 Dconvection cooling 0 2m s S g 1m s 2m s 4 0 40 30 20 10 0 10 20 30 40 50 60 70 80 90 Fig 8 17 Load current vs ambient temperature CHS3004812 Vin 48V Ambient temperature C Load current A 28 24 ey z O o 16 3 a convection cooling 0 2m s e Q1m s 2m s 4 0 40 30 20 10 0 10 20 30 40 50 60 70 80 90 Fig 8 18 Load current vs ambient temperature CHS3004812H Vin 48V Ambient temperature C 45 40 35 o Z 30 25 5 20 E convection cooling 0 2m s q 1m s 10 2m s 5 0 40 30 20 10 0 10 20 30 40 50 60 70 80 90 Fig 8 19 Load current vs ambient temperature CHS4004810 Vin 48V CHS 28 Ambient temperature C 35 30 25 20 15 convection cooling 0 2m s i 1m s 2m s 5 0 40 30 20 10 0 10 20 30 40 50 60 70 80 90 Ambient temperature C Fig 8 20 Load current vs ambient temperature CHS4004812 Vin 48V
13. COS EL Basic Characteristics Data Basic Characteristics Data Model Circuit method en eee AS the se aie iy E f SENS orton ey kHz protection Material ann aided araon operation CHS60 Foward converter 440 1 glass fabric base epoxy resin ultilayer Yes 2 CHS80 Half bridge converter 250 1 glass fabric base epoxy resin ultilayer Yes 2 CHS200 Full bridge converter 150 1 glass fabric base epoxy resin ultilayer Yes 2 CHS300 Full bridge converter 170 1 glass fabric base epoxy resin ultlayer Yes x2 CHS400 Full bridge converter 150 x1 glass fabric base epoxy resin ultlayer Yes 2 CHS500 Full bridge converter 150 1 glass fabric base epoxy resin ultlayer Yes x2 1 Refer to Specification 2 Refer to Instruction Manual CHS 16 MARI tes Instruction Manual CO EL Pin Connection CHS 18 Connection for Standard Use CHS 18 Wiring Input Output Pin CHS 19 Soil WNE MON ONIN 22222sessscsscccsossssocesnsnnnnsnonsnnsinnnenesssseneeeanensnessee CHS 19 82 Wing CUNU JN EE CHS 19 Function CHS 19 RO O CHS 19 zo ME venvoltagesorotectone aa CHS 20 SE MAO EL O QE CHS 20 A O O CHS 20 ES 111 TO EEE CHS 20 OR US DIE OA ER CHS 21 A QE CHS 22 ALS PAMIBIUIS Manage 22 222 222ee22 see osennssceressecsssarassssasstenresensesetesessbzssosiesee CHS 22 Series and Parallel Operation CHS 22 INMI S ere sio cl on
14. E V CHS6048 CHS8048 CHS20048 CHS30048 CHS40048 CHS50048 Fig 4 7 CHS Output Voltage Adjustment Range 4 7 Isolation For a receiving inspection such as Hi Pot test gradually increase decrease the voltage to start shut down Avoid using Hi Pot tester with timer because it may generate voltage a few times higher than the applied voltage at ON OFF of a timer 4 8 PMBus interface CHS300 CHS400 This option is equipped with a digital PMBus interface Please contact us about for details 5 Series and Parallel Operation 5 1 Series operation Series operation is available by connecting the outputs of two or more power supplies as shown below Output current in series connection should be lower than the lowest rated current in each unit a b Power Power Supply Supply E 9 3 oO Oo ssl Power Supply E Power E Supply Fig 5 1 Examples of series operation CHS 22 5 2 Parallel operation P CHS400 CHS500 This option is for parallel operation Sensing and adjustment of the output voltage are not possible at the time of the use with this option BAS variance of output current drew from each power supply is maximum 10 the total output current must not exceed the value determined by the following equation Output current in parallel operation the rated current per unit x number of unit x0 9
15. LL LLL AA AAA 0 CHS 22 2 Parral lello peral omo nn E O CHS 22 5 E Glial A ee LM dE CHS 22 6 Implementation Mounting Method CHS 23 TEMO timet odd CHS 23 6 2 AutomaticiMouming CHA SS eie sio pi i CHS 23 CSS CCE e ee CHS 23 CASES SION OO CHS 24 CSC EE CHS 24 60 Storagemmethodi CHSsenes optionio E a a CHS 24 DY tress tothe ROC m eee aaa CHS 24 Safety Considerations CHS 25 Derating CHS 25 SC SIDE e 2s acsenseccencnnsnesseacassesenscassssensseasessessesansseesess CHS 25 9 SMD type optionS package information s CHS 17 CcO EL Instruction Manual 1 Pin Connection eCHS60 VIN RC o VIN CHS80 o Q o VOUT Q S TRM s VOUT VNG RCO o VIND o oO o Oo CHS200 VOUT D S TRM amp S VOUT VINO o RCO o VIND o CHS300 VIN o RC VIN o CHS400 CHS500 VINO o RC VINO o O 0000 CHS 18 Fig 1 1 Pin Connection bottom view VOUT S TRM s D VOUT VOUT D S O TRM S D VOUT VOUT Q S TRM s D VOUT Table 1 1 Pin Connection and function No Pin Connection Function O VIN DC input Qo RC Remote ON OFF O VIN DC input O VOUT DC output O S Remote sensing O TRM Adjustment of outp
16. Please see the External View a CHS60 for details of the adsorption point If the bottom dead point of a suction nozzle is too low when 5 14 mounting excessive force is applied to the inductor it could cause damage Please mount carefully VIN o VOUT A o S 6 3 Soldering RC o TRM 1 Flow Soldering 260 C 15 seconds or less o S VIN 9 VOUT 2 Soldering Iron maximum 450 C 5 seconds or less b CHS80 3 Reflow Soldering option S 37 8 WFig 6 2 shows conditions for the reflow soldering for option S of CHS series Please make sure that the temperatures of pin 5 24 terminals VIN and VOUT shown in Fig 6 2 do not exceed the temperatures shown in Fig 6 3 VIN O VOUT lf time or temperature of the reflow soldering goes beyond the o 8 conditions reliability of internal components may be compromised RC TRM Please use the unit under the recommended reflow conditions o S VIN O VOUT c CHS200 CHS 23 CO EL Instruction Manual VIN gt a CHS60 VOUT VIN gt o OoooQ H VOUT b CHS80 Fig 6 2 Temperature Measuring Points when Setting Reflow Soldering Conditions Tp Tx Ty2 Ty1 j A t A T B T m C 1 time s A 1 0 5 0 C s A Ty1 160
17. ble R 50Q C 0 01u F Fig 3 3 Measuring method of Ripple and Ripple Noise 4 Function 4 1 Overcurrent protection WOver Current Protection OCP is built in and works at 105 of the rated current or higher However use in an overcurrent situa tion must be avoided whenever possible The output voltage of the power module will recover automatically when the fault causing overcurrent is corrected When the output voltage drops after OCP works the power mod ule enters a hiccup mode where it repeatedly turns on and off at a certain frequency CHS 19 co eL DV I NN Instruction Manual 4 2 Overvoltage protection The overvoltage protection circuit is built in The DC input will be shut down if overvoltage protection is in operation The output voltage of the power module will recover automatically when the fault causing over voltage is corrected Remarks Please note that devices inside the power supply might fail when voltage more than rated output voltage is applied to output pin of the power supply This could happen when the customer tests the overvoltage performance of the unit 4 3 Thermal protection When the power supply temperature is kept above 120 C the thermal protection will be activated and simultaneously shut down the output The output voltage of the power supply will recover automatically when the unit is cool down e U WOption U means output is shut dow
18. ient temperature CHS80483R3 Vin 48V lt 2 3 s o CDconvection cooling 0 2m s 8 6 1mis 4 2m s 2 0 40 30 20 10 0 10 20 30 40 50 60 70 80 90 Ambient temperature C Fig 8 8 Load current vs ambient temperature CHS804805 Vin 48V CDconvection cooling 0 2m s m s 2 2m s Load current A A 0 40 30 20 10 0 10 20 30 40 50 60 70 80 90 Ambient temperature C Fig 8 9 Load current vs ambient temperature CHS804812 Vin 48V 60 Load current A wo o 20 CDconvection cooling 0 2m s 1m s 10 2m s 0 40 30 20 10 0 10 20 30 40 50 60 70 80 90 Ambient temperature C Fig 8 10 Load current vs ambient temperature CHS200483R3 Vin 48V 45 IN o a N a N e convection cooling 0 2m s 1m s 2m s a a Load current A EN o a 0 40 30 20 10 0 10 20 30 40 50 60 70 80 90 Ambient temperature C Fig 8 11 Load current vs ambient temperature CHS2004805 Vin 48V ES o A a Dconvection cooling 0 2m s m s 4 2m s L
19. n when the abovementioned protection circuit is activated If this happens protection circuit can be inactivated by cycling the DC input power off for at least 1 second or toggling Remote ON OFF signal 4 4 Remote ON OFF llRemote ON OFF circuit is built in on the input side RC The ground pin of input side remote ON OFF circuit is VIN pin Table 4 1 1 Specification of Remote ON OFF CHS80 CHS200 ON OFF Output Between RC and VIN logic voltage L level 0 0 8V or short ON Standard Negative Tevel 2 0 7 0Vyoropan OFF e L level 0 0 8V or short OFF Optional R Positi prona OSO TH level 2 0 7 0V or open ON When RC is Low level fan out current is 0 1mA typ When Vcc is applied use 2 0 lt Vcc lt 7 0V Table 4 1 2 Specification of Remote ON OFF CHS60 CHS300 CHS400 CHS500 ON OFF Output Between RC and VIN logic voltage L level 0 0 8V or short ON Standard Negative ao v OV aropen OFF 7 L level 0 0 8V or short OFF Optional R Positi sa OSIIVO LH level 4 0 7 0V or open ON When RC is Low level fan out current is 0 1mA typ When Vcc is applied use 4 0 lt Vcc lt 7 0V CHS 20 When remote ON OFF function is not used please short between RC and VIN R open between RC and VIN Vec 20SVccS7 0V RC RC VIN VIN Transistor RC to RC E M VIN VIN IC Relay Photo coupler Fig 4 1 RC connec
20. oad current A 0 40 30 20 10 0 10 20 30 40 50 60 70 80 90 Ambient temperature C Fig 8 12 Load current vs ambient temperature CHS2004812 Vin 48V 45 40 35 E an e 25 3 20 8 CDconvection cooling 0 2m s S 15 1m s 10 2m s 5 Vo 30 20 10 0 10 20 30 40 50 60 70 80 90 Ambient temperature C Fig 8 13 Load current vs ambient temperature CHS3002405 Vin 24V 18 16 14 X 12 E S 10 O 3 a 8 CDconvection cooling 0 2m s A 8 Q1m s 4 2m s 2 Vo 30 20 10 0 10 20 30 40 50 60 70 80 90 Ambient temperature C Fig 8 14 Load current vs ambient temperature CHS3002412 Vin 24V Load current A CDconvection cooling 0 2m s 4 1m s 2m s 2 0 40 30 20 10 0 10 20 30 40 50 60 70 80 90 Ambient temperature C Fig 8 15 Load current vs ambient temperature CHS3002415 Vin 24V CHS 27 CO EL Instruction Manual 32 28 24 20 CDconvection cooling 0 2m s Load current A gt Load current A 12 m s 5 2m s 4 0 40 30 20 10 0 10 20 30 40 50 60 70 8
21. pressure to the lead and name plate with a brush or scratch it during the cleaning After cleaning dry them enough 6 6 Storage method CHS series option S MiTo stock unpacked products in your inventory it is recommended to keep them under controlled condition 5 30 C 60 RH and use them within a year 24 hour baking is recommended at 125 C if unpacked products were kept under uncontrolled condition which is 30 C 60 RH or higher Original trays are not heat resistant Please move them to heat resistant trays in preparation to bake To check moisture condition in the pack Silica gel packet has some moisture condition indicator particles Indicated blue means good Pink means alarm to bake it Notification The tray will be deformed and the power supply might be damaged if the vacuum pressure is too much to reseal 6 7 Stress to the product IICHS series transformer core and choke coil core are attached by glue There is a possibility that the core will be removed and power sup ply will be damaged when they receive stress by the fall or some kind of stress CO EL Instruction Manual 7 Safety Considerations pile a WTo apply for safety standard approval using this power supply the following conditions must be met This unit must be used as a component of the end use equipment The equipment must contain basic insulation between input and output If double or reinforced insulation is required it has to be
22. tentiometer WWhen the output voltage adjustment is used note that the over voltage protection circuit operates when the output voltage is set too high Wif the output voltage drops under the output voltage adjustment range the Low voltage protection operates By connecting the external potentiometer VR1 and resistors R1 R2 output voltage becomes adjustable as shown in Fig 4 4 Recommended external parts are shown in Table 4 2 The wiring to the potentiometer should be as short as possible The temperature coefficient could become worse depending on the type of a resistor and potentiometer Following parts are rec ommended for the power supply Resistor Metal film type coefficient of less than 100ppm C Potentiometer Cermet type coefficient of less than 300ppm C lWWhen the output voltage adjustment is not used open the TRM pin respectively The change speed of the TRM voltage should be less than 0 15V ms when changing output voltage to less than 90 of the rated VOUT S Control Amp of rated R1 voltage 1 TRM Q9 VR1 R2 5kQ 5 11kQ 4 i fee Ee eye ee eee cd M VOUT Fig 4 4 Output voltage control circuit Table 4 2 Recommended value of external potentiometer amp resistor Output adjustable range No VOUT VOUT 15 VOUT 10 R1 R2 VR1 R1 R2 VR1 1 3 3V 2 2kQ 68kQ 2 2kQ 33kQ 2 5V 4 7kQ 68kQ 5 6kQ 33kQ 3 10V 15kQ 68kQ 5kQ
23. tion example 4 5 Remote sensing 1 When the remote sensing function is not in use VOUT S S VOUT Load Short at pin root Fig 4 2 Connection when the remote sensing is not in use When the remote sensing function is not in use it is necessary to confirm that pins are shorted between S amp VOUT and between S amp VOUT WWire between S amp VOUT and between S amp VOUT as short as pos sible Loop wiring should be avoided This power supply might become unstable by the noise coming from poor wiring 2 When the remote sensing function is in use Wire as close as possible VOUT S Load S VOUT Fig 4 3 Connection when the remote sensing is in use Twisted pair wire or shield wire should be used for sensing wire WThick wire should be used for wiring between the power supply and a load Line drop should be less than 0 3V Voltage between VOUT and VOUT should remain within the output voltage adjustment range Wf the sensing patterns are short heavy current is drawn and the pattern may be damaged The pattern disconnection can be prevented by installing the pro tection parts as close as possible to a load WlOutput voltage might become unstable because of impedance of wiring and load condition when length of wire exceeds 40cm COSEL 4 6 Adjustable voltage range 1 To adjust output voltage Output voltage is adjustable by the external po
24. ut voltage o S Remote sensing VOUT DC output No Pin Connection Reference O VIN 3 1 Wiring input pin Q RC 4 4 Remote ON OFF O VIN 3 1 Wiring input pin VOUT 3 2 Wiring output pin S 4 5 Remote sensing O TRM 4 6 Adjustable voltage range D S 4 5 Remote sensing VOUT 3 2 Wiring output pin 2 Connection for Standard Use Min order to use the power supply it is necessary to wire as shown in Fig 2 1 Reference 3 Wiring Input Output Pin 8 Derating Short the following pins to turn on the power supply VINORC VOUTe S VOUTe S Reference 4 4 Remote ON OFF 4 5 Remote sensing WThe CHS series handle only the DC input Avoid applying AC input directly It will damage the power supply Fuse op VIN VOUT Cin S DC input EA RC e Load VIN VOUT 4 Cin External capacitor on the input side Fig 2 1 Connection for standard use Table 2 1 Recommended External capacitor on the input side Model CHS30024 Cin 6604F or more Model CHS6048 CHS8048 CHS20048 CHS30048 CHS40048 CHS50048 Cin 66uF or more 33uF or more 100uF or more 200uF or more CO EL Instruction Manual 3 Wiring Input Output Pin 3 1 Wiring input pin 1 External fuse WiFuse is not built in on input side In order to protect the unit install the normal blow type fuse on input side lW
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