Industrial Environment Switching Regulators 19" Fouo. PSR: Positive Switching Regulators PSL-Family Table of Contents Type Survey oo. cesses eeceeseseseeeeasecsnetecreeneteers 5-37 DeSCription 00... cece tereereeereee we Safety and Installation Instructions ....... immunity to Environmental Conditions .. Electromagnetic Compatibility EMC ...... Characteristics and Detinitions....... Electrical Input and Output Data oo eee 5-42 Standard Features oes eereecensersenetseretanee 5-44 Description of Options ... 5-44 Mechanical Data occ Type Key and Product Marking ... Type Survey Table 1: Type survey Nominal | Nominal cy Type Options | Superseded | Pe yee | {phase-out} i a PSL5A2-7R | -9,L,1.P,C.D,A | PSRSIZE7 | eee fe ee PSL SA10-7R | PSR S10E7 89% PSL 128-7R Le ek Pee . | PSL 158-77 29...80 V SOV | 92% =| PSL248-7R 42...80 V GOV | 94% PSL 368-77 See data Ao min (Min. differential voltage L4~ U4) Description The PSL family of positive swiching requiators are de- External input circuitry signed as power supply modules for electronic systems. Their major advantages include a high level of efficiency that remains virtually constant over the entire input range, high reliability, low ripple and excellant dynamic response. Modules with input up to 80 V are specially designed for secondary switched and battery driven applications. Case LO4: Aluminium, black finish and self cooling. An external capacitor (see "Application Notes") is required in rectifier mode and in DC operation mode only, if the sum of the lengths of the two input lines between source and in- put (without option L) is greater than approx. 5 m. For jong connection lines the use of option L is recommended in or- der to reduce superimposed interference voltages or cur- rents and to prevent oscillation. Tettinn 1/96 -@ Maicher AG MELCHER 5 - 37 The Power Portosws. ammi... PSL-Family Switching Regulators 19" Industrial Environment Input mm | Filter + | eee fiat L (option) ' Y : + : Control circuit ic {option ca + A (option) Up : oP i Fig. 1 } | Block diagram 3b we D (option) P (option ee ' Safety and Installation Instructions Safety If the output circuit of a switching regulator is operator-ac- _ installer or user to assure the compliance with the relevant cessible according to the IEC 950 related safety standards, and applicable safety standards. it shall be an SELV circuit (Safety Extra Low Voltage circuit, |f the following table is observed, the output of any switch- i.e. a circuit, separated from mains by at least basic insula- ing regulator is considered to be an SELV circuit up to a tion, that is so designed and protected that under normal pgminal output voltage of 36 V. and single fault conditions, the voltage between any two conductors and between any conductor and earth does not exceed 60 V DC). Note: Check for hazardous voltages: before altering any connections. Do not open the module. The. input In the following section an interpretation is provided of the i it - IEC 950 safety standard with respect to the safety status of ae oat is nacre Howton ie. the nega: the output circuit. However, it is the sole responsibility of the Table 2: Insulation concept for SELV circuits | Nominal | Minimum required grade | Maximum | Minimum required | Measures to achieve the _| Resulting safety mains ~ of isolation, to be output | safety st the. | epeeites setty tet > | status. of the "supply | provided by the AC-DC | voltage __ front end output circu EIN Out pee: | switching voltage front end, including mains} from the - a | regulator output (AC) supplied battery charger | front end : : oo earoudt None Battery supply completely <60 V SELN battery circuit | None SELV circuit Separated from mains <80 V Hazardous voltage battery | Input fuse ' and unearthed, SELV circuit circuit 2 non operator-accessible case? | Hazardous voltage battery | Input fuse ' and earthed output | Earthed SELV circuit circuit 5 and earthed or non circuit operator-accessible case ' <250V | Basic <60V_ | Earthed SELV circuit Earthed input circuit 3 SELV circuit ELM circuit Input fuse and Earthed SEL : earthed output circuit > circuit : | <80 V Hazardous voltage Input fuse ' and earthed output | Earthed SELV i secondary circuit circuit? and earthed 3 or non circuit | operator-accessible case | | Double or reinforced <60 V SELV circuit None | SELV circuit | | <80V Double or r reinforced i insu- Input fuse! and unearthed and | SELV circuit lated unearthed hazardous | non operator-accessible case 2 | voltage secondary circuit 2 | 1 The installer shail provide an approved fuse (slow blow type with lowest rating suitable for the application, max. 12.5 A) in the positive or negative input conductor directly at the input of the switching regulator. For UL's purpose, the fuse needs to be UL-listed. If option C is fitted, a suitable fuse is built-in. 2 Has to be insulated from earth by double or reinforced insulation according to the relevant safety standard, based on the maximum in- put voltage of the switching regulator (contrary to the case marking: "This apparatus must be earthed,"). 3 The earth connection has to be provided by the installer according to the relevant safety standards, e.g. IEC 950. Edition 1/96 - Melcher AG 5-38 orIndustrial Environment Standards and Approvals All Melcher power supplies are subject to manufacturing surveillance in accordance with [SO 9001 standards. All units are UL recognized as per UL 1950, UL. 1012 and CAN/CSA C22.2 No. 234-Mg0. Instaliation Instructions The connector pin allocation table defines the electrical potentials and the physical pin position on the connector. Pin no. 32 is the protective ground pin and is protruding, i.e. attaching the female connector, this pin provides electrical contact first. The modules should only be wired via the fe- male connector H11 (according to DIN 41612) to ensure requested safety! @ aT | t | | GQOODOAODDOD Fig. 2 View of male H11 connector Immunity to Environmental Conditions ee 4: Mechanical stress Switching Regulators 19" PSL-Family Protection Degree The protection degree is defined by IP 30 (equipped with any potentiometer adjustable option: IP 20). The protection degree applies only if the module is plugged-in or the fe- male connector is properly attached to the module. Table 3: H11 connector pin allocation and designation [ Electrical Determination TypeHtt Pin-No. | Design. R-input (or inhibit input) 1 2 ; Ri | Undervoltage monitor (Option D) 5 D ee Output voltage (negative) 8 | Go~ | Output voltage (negative) if] Go- Ouipui voltage(positive) 14 | Vo+ | Output voltage (positive) 17 Vor | | Input voltage (negative) 20 | Gi- | Input voltage (negative) 23 | Gi- Input voltage (positive) 26 Vie Input voltage (positive) 29 | Vit | | Protective ground (protruding pin) 32 R-input (output voltage programming) not available with option P (potentiometer) or option i {inhibit} [TestMethod =| Standard _[YestConditions | Situs t Ca_ | Damp heat DIN 40046 part Temperature: 402C Unit not | steady state iEC 68-2-3 Relative humidity: 93 +23 0% operating | i MIL-STD-810D section 507.2 | Duration: 56 days i Ea Shock | DIN 40046 part 7 Acceleration amplitude: 100 g, = 981 m/s? Unit not | ue sinusoidal) IEC 68-2-27 Bump duration: 6 ms operating MIL-STD-810D section 516.3 ) Number of bumps: 18 (3 each direction) | {| j; _ Eb a shock | DIN 40046 part 26 Acceleration amplitude: 40 gn = 392 m/s? Unit (half-sinusoidal) {EC 68-2-29 Bump duration: 6 ms | Operating | ___| MIL-STD-810D section 516.3 | Number of bumps: 6000 (1000 each direction) | | Ee | Vibration | DIN 40046 part 8 | Frequency (1 Oct/min): 10...2000 Hz | Unit | (sinusoidal) | IEC 68-2-6 | Max. vibration amplitude: 0.35 mm (10...60 Hz) | Operating | MIL-STD-810D section 514.3 | Acceleration amplitude: 5 Gn = 49 mis? (60...2000 Hz) | | Test duration: 7.5 h (2.5 h each axis) | Fda | Random vibration | DIN 40046 part 23 Accieration spectral density: 0.05 g?/Hz | Unit not | ! wide band IEC 68-2-35 | Frequency band: 20...500 Hz | operating | | feproducibility high , Acceleration magnitude: 4.9 rms | = Test duration: 3h (1 h each axis) jb | Salt mist | DIN 40046 part 105 | Concentration: 5% (30C) Unit not | cyclic | TEC 68-2-52 Duration: 2h per cycle operating | | (sodium chloride | Storage: i | NaCt solution) Storage duration: 22 h per cycle L | ; Number of cycles: 3 40C, 93% rel. humidity | Table 5: Temperature specifications | Tp mp Ui min--- Ui max Tc | Case temperature f = 0... nom Ts Storage temr temperature | Not operational Edition 1/96 - Melcher AG (m) MELCHER The Fo PONIES rn aGi. PSL-Family Switching Regulators 19" industrial Environment Table 6: MTBF and device hours | MTBF Ground Fixed ye Ground Moblie Device Hours > | T | MTBF acc. to MIL- HDBK- 217D To = 40C Te = 70C i To = 40C To = 70C | | 130'000 h 58'000 h 36'000 h 17'000 h s900'000 h_ | 1 Statistical values, based on an average of 4300 working hours per year and in general field use Electromagnetic Compatibility EMC immunity General condition: Case earthed. Table 7: Immunity type tests Phenomenon |. Stendard - \Clags| Hing |. ie Wer poo Test In. | Per- Impuise voltage | IEC 255-4 | ilt i/o, i/e, ofc 5000 Vp 1.2/50 ps 500 2 | Spos.and3neg. | no - App. E45 ti/-i impulses per (1976) coupling mode High frequency | IEC 255-4 I i/o, i/c, ofc 2500 V, | 400 damped j{ 2002 2s per yes: 1 | disturbance | App. E55 Hi 1000 V, 1 MHz waves/s coupling mode (1976) Voltage surge IEC 571-1 i/e, +141 800 Vp 100 pis 1002 | yes 2 (1890-07) 1500 Vp 50 us 1 pos. and 1 neg. valtage surge per coupling mode 3000 V, 5 us 4000 Vp tps | 7000 V, 100 ns | Electrostatic IEC 801-2 3 | contact discharge | 6000 V, 1/50 ns 330Q | 10 positive and yes | 76 | discharge (1991-04) to case 10 negative | discharges Electric field IEC 801-3 2 antenna in | 3V/m | sine wave mod- 26...1000 MHz yes | ' : (1984) imdistance ulated w. 1 kHz | Fast transient/ ~ IEC 801-4 3 ile, +i/-i 2000 V, |bursts of 5/50 ns} 50Q 1 min positive yes 136 ' burst (1988) 5 kHz rep. rate 1 min negative : transients with | bursts per i 15 ms burst coupling mode ; duration and a |_| 4 4000 V, | 300 ms period 236) Transient | 1EC 801-5 We i/c 2000 Vp 1.2/50 ps 12Q | 5pos.and5neg. | yes | 2 (Draft 1993-01) tid 1000 Vp 2Q impulses per | coupling mode Immunity to | IEC 801-6 3 | i,0,signalwires | 10Vime? 80% amplitude | 500 | AMO.15...80MHz | yes) 1 | conducted | modulated | 'disturbancies | | with 1 kHz | | 1 Normal operation, no deviation from specifications 2 Normal operation, temporary deviation from specs possible 3 With option C: manual reset 4j = input, o = output, c = case 5 In correspondance with DIN 57435 part 303 and VDE 0435 part 303 (1984-09) 6 Option L neccessary 7 Open circuit Emission For emission levels refer to Electrical Input and Output Data. 5-40 Edition 1/96 - Melcher AG G) MELCHER Phe Pry BrieIndustrial Environment Switching Regulators 19 PSL-Family Characteristics and Definitions Output Protection A voltage suppressor diode protects the output against an internally generated overvoltage, which could occur due to a failure of the control circuit, which in worst case condi- tions fails into a short circuit. The suppressor diode is not designed to withstand externally applied overvoltages. The user should ensure that systems with Melcher power sup- plies, in the event of a failure, do not result in an unsafe condition (fail-safe). Dynamic Characteristics t Fig. 3 Behaviour and characteristics under varying load condi- tions. Temperature When a converter is located in free, quasi-stationary air ata temperature Ts = 71C and is operated at its nominal output power, the case temperature Tc will be about 95C after the warm-up phase measured at the measuring point of case temperature Tc (see "Mechanical Data"). Under practical operating conditions, the ambient tempera- ture T, may exceed 71C, provided additional measures are taken to ensure that the case temperature Tc; does not exceed its maximum value of 95C ( heat sink, fan, etc.). Example: Sufficient forced cooling allows Ts max = 85C. A simple check of the case temperature Tc (Tc < 95C) at full load ensures correct operation of the system Py Ml Py max (forced cooling) ~~ (convection cooling) ~~~ 70 ' I 20 20 + 10 : L i 4 50 60 90 4 -~40 100 Fig. 4 Output power derating versus ambient temperature Parallel and Series Connection Outputs of equal nominal voltages can be parallel-con- nected. However, the use of a single unit with higher output power, because of its power dissipation, is always a better solution. in parallel-connected operation, one or several outputs may operate continuously at their current limit knee-point which will cause an increase of the case temperature. Con- sequently, the max. ambient temperature value should be reduced by 10 K. Outputs can be series-connected with any other module. In series-connection the maximum output current is limited by the lowest current limitation. Gafvanically separated source voltages are needed for each module! Short circuit behaviour A constant current limitation circuit holds the output current almost constant whenever an overload or a short circuit is applied to the regulators output. It acts self-protecting and recovers - in contrary to the fold back method - automati- cally after removal of the overload or short circuit condition. UUg ram 12 1.0 0.8 0.6 0.4 0.2 0 & ~2 folly nom 0.2 04 #06 O08 10 12 1.4 Fig. 5 Overload, short-circuit behaviour Uy versus |, ne Ta PC] Edition 1/96 - Melcher AG i M ae ELCHER r Baetoe rs N 6a. PSI_-Family Switching Regulators 19" Industrial Environment Electrical Input and Output Data Genera! Conditions Ta = 25C, unless T is specified. With R or option P, output voltage Up = Uo nom at fo nom Table 8a: Input and output data Characteristics : Conditions) -PSLBAI2 | cb 5 PSL 128 Unit be ee I typ oma ot Spot typ cornea fs: Output ae a oe ee Us nam Output voltage Usnoms fo nom 5.07 5.13 | 5.07 5.13 11.92 1207 | v fonom | Output current U min... Ui max 12.0 10.0 8.0 A fa. | Output current Te min: Te max 12.0 156 | 10.0 130 | 80 10.4 | limitation response | jo Up | Ripple at output | Ui nom 50 35 50 80 150 MV pp | (BW = 20 MHz) lonom | AU. u | Static control deviation | Ubmin...Uk max 45 | 30 45 50. 75 mv | | _ versus input valtage U | fo nom | | AU,, | Static control deviation | Us nom 25 20.25 28-35 versus output current fo | fo = 0...f6 nom L Usa Dynamic control Ui nom 130 130 130 deviation ' lonom? fs f \ | ro nom oO nom po L {| t Dynamic load transient 40 50 60 + ps time recovery | | Gyo. Temperature coefficient} U min-Ui max to! +1 +2 | mViK/ AU ATS To min... To max i lL fy = O...fo nom +0.02 | +0,02 +0.02 \ SK . Input : oe | U | Input voltage [6 = O..fo nom 7 40 8 80 15 80 (VDC | Te min... Te max _ ee a Aig min} Minimum differential 2 3 3 Vv voltage Uj- Up? Uo Undervoltage cut-out 6.3 ' 7.3 7.3 f No load h=0 45 40 35 mA input current UY, min--- Ui max ihm Peak value of U oom : 150 250 250 A inrush current & : : a ff hs | Risetime 3 / 5 5 5 ps tr | Tail half value time? 40 40 40 him Peak value of Ui nom T 250 350 350 A inrush current $ with option L tis Rise time 3 25 25 25 us | by Tail half value time ? 125 125 125 Un | RFllevel atinput,4 | VDE 0871 (6.78)! B B B eB) 0.01...30 MHz Unom b nom L I i 7" : : 5 : ; : a a | Efficiency : ; n Efficiency /Uinom fonom a 83 I 76 | 89 L% Us ' Isolation test voltage _| Inputs/outputs 750 | 750 | 750 ivDC ' _ electronics to case interconnected | | i 1 See "Dynamic characteristics" 2 The minimum differential voltage AUy min between input and output increases linearly from 0 to 1 V at Ta = 46C and 71C (To = 70C and 95C) 3 Definitions according to VDE 0433, part 3 4 With option L and additional external input capacitor Ce = 120 1 F/100 V, e.g. Nichicon, PF(M) series, or equivalent Edition 1/96 - Melcher AGIndustrial Environment Switching Regulators 19" PSL-Family Table 8b: Input and output data Characteristics >; LConditions 2 PSL 968 Unit Cee ee nee in min yp max | Us nom | Output voltage Usnom, fo nom 14.91 15.09 23.85 2414 | 35.78 36.22 Vv Jonom | Output current Us min--- U4 max 8.0 8.0 8.0 A fot, Output current Te min. TC max 8.0 10.4 8.0 10.4 8.0 10.4 : i imitation response- Uo _| Ripple at output Urom 80-150 100 250 150 300 | mV pp (BW = 20 MHz) fa nom { | AUsu | Static control deviation | Us min-..Ut max 70 100 | 150 220 | 200 270 | mv versus input voltage Ui | fo nom AU, | Static control deviation | U nom 33 45 i 120 160 125 160 versus output current fy | 4 = 0..4o nom Uo g Dynamic control U; nom 130 150 220 deviation ' lo nom? 3 fo nom t | Dynamic load transient 60 80 100 ps | time recovery ' | Quo Temperature coefficient! U min-.-Ui max +3 +5 +8 Imv/K \ | AU)/ATe Tomine Tomax 9) fy = 0...o nom +0.02 +0.02 +0.02 | %/K ! Ui Jinput voltage f= 0...lonom | 19 80 29 80 42 go iVDC Te min--- Tc max _ | AUsg nin} Minimum differential 4 5 6 v voltage Ui- Us? | io Undervoltage cut-out 7.3 12 [ 19 ho |Noload '=0 35 35 Cd 40. | ma input current Ui min. Uj max bm Peak value of U nom 250 250 250 A inrush current 3 itis Rise time 3 5 5 5 ps $j - ae en fr, Tailhaltvaluetime> | ee 400 40 _ him Peak value of Us nom 350 350 350 A inrush current ? with option L ts Rise time 3 25 25 L 25 ris ; t, __| Tail half value time 125 125 125 uci | RFI level at input, 4 VDE 0871 (6.78) | B B B BBuVY) (9.01...30 MHz Ubnom: fo nom | q | Efficiency [U, nom; fo rom { 30 | 92 | 94 | % , ui Isolation test voltage _| Inputs/outputs 750 750 750 VDC | electronics to case interconnected ee ee to 1 See Dynamic characteristics" 2 The minimum differential voltage AUio min between input and output increases linearly from 0 to 1 V at Ta = 46C and 71C (Te = 70G and 95C) 3 Definitions according to VDE 0433, part 3 4 With option L and additional external input capacitor Cz = 120 i F/100 V, e.g. Nichicon, PF(M) series, or equivalent Edition 1/96 - Melcher AG MELCHER 5-43 The Power Partacrs | a| O.. PSL-Family Switching Regulators 19" Industrial Environment Standard Features R External Output Voltage Adjustment Note: With open R input, Uo = Ub nom- (For superseded PSR types, Up = 1.08 Up nom) R-input together with option i or option P cannot be supported simultaneously. The output voltage U, can either be adjusted with an exter- nal resistor (A, or Az) or with an external voltage (U,,). The adjustment range is 0...1.08 of Up nom. The minimal differen- tial voltage AU min between input and output should be maintained (see data). Min. input = Undervoltage cut-out. Vo+ tee OP ' 4000 0 [ ' EBS + ' ' oT my 1 ae OS ce Fig. 6 feces see Voltage adjustment with Up, [V] between R and G (Go-): a) Un = Usx Yornorn_ (User = 2.5 V 44%) Ubet To prevent damage U,, should not exceed : thei; nor be negative: Description of Options Option i Inhibit Note: With open i-input, output is enabled (U, = on). Inhibit excludes R function! The inhibit input allows the switching regulators to be disa- bled via a control signal. In systems with several units, this feature can be used, for example, to control the activation sequence of the regulators by a logic signal (TTL, C-MOS, etc.). An output voltage overshoot will not occur when the units are switched on or off. Fig. 7 Voltage adjustment with external resistor R, or Re [Q] b) Uo =0...100% Us nom, using A; between R and G (Go-): A Yo= Uonom* 4000 , 4000+ U U nom 7 Uy R, C) Up = Up nom... Uo max, using A between R and Vo+: Us max = Uo nom + 8% = e Re _ Uret Uo = User Fy (Rez + 4000) - 4000 k= Uo nom Up * (1-k) = eS =2, +4% Fr = 4000 * U, = te (Uses = 2.5 V 44%) Ail formulae give approximate values only. Fig. 8 Definition of linn aNd Vinn Finn [mA] usu, nom 5 1 4 ( 04 | sk 0 Cs TT : 2 Vinn 1 t 1 U,on U, off \ U inn VI . o- t 60 -40 -30 -20 -10 0 10 20 30 40 50 Fig. 9 function of inhibit sianal Fig. 10 Output response as a function of inhibit signa Inhibit current linn versus inhibit voltage Uinn Data Table 9: Inhibit characteristics Characteristics - Conditions min. typ mek Unit Yin Inhibit input voltage to keep | U, =on ; Ui min. Ui max | __50 - +0.8 VDC regulator output voltage... Up =ott Tl Fo min.-- To max 124 +50 t, Switch-on time after inhibit command U= Unom _ 5 ae _ ms ty Switch-off time after inhibit command FL = Un nom Mo nom 10 | L t or 4 Hott | Input current when inhibited 4 = 0, U=U nom 10 mA 5-44 MELCHER Edition 1/96 - Melcher AG The Power PartnersIndustrial Environment Switching Re gulators 19" PSL-Family Option -9 Extended Temperature Range The operational ambient temperature range is extended to Ta = 40...71C. Option L input filter Option L is recommended to reduce superimposed inter- ference voltages, and to prevent oscillations, if input lines exceed approx. 5 m in total length. The fundamental wave (approx. 120 kHz) of the reduced interference voltage be- tween Vi+ and Gi- has, with an input line inductance of 5 pH a maximum magnitude of 4 MVims. The input impedance of the switching regulator at 120 kHz is about 50 mQ. The harmonics are small in comparison with the fundamental wave. See also data: RFI. With option L, the maximum permissible additionally super- imposed ripple u, of the input voltage (rectifier mode) at a specified input frequency f; has the following values: Input voltage up to 40 V: Ui max = 12 Vpp at 100 Hz or Vpp = 1200 H2/fi* 1V Input voltage up to 80 V: Ui max = 22 Vpp at 100 Hz Or Vpp = 2200 H2/fie 1V Option Thyristor Crowbar This option is recommended to protect the load against power supply malfunction, but it is not designed to sink ex- ternal currents. A fixed-value monitoring circuit checks the output voltage Up. When the trigger voltage Uo. is reached, the thyristor crowbar triggers and disables the output. It may be deacti- vated by removal of the input voltage. In case of a switching transistor defect, an internal fuse prevents excess current. Table 10: Crowbar trigger levels Option P Potentiometer Option P and the R-function cannot be supported simulta- neously. The output voltage U, can be adjusted with a screwdriver in the range from 0.92...1.08 of the nominal out- put voltage Us nom. However, the minimum differential voltage AU, 9 min between input and output voltages as specified in "Electrical Input and Output Data" should be maintained. Option U Ambient Temp. Range acc. UL Recognition Underwriters Laboratories (UL) have approved the PSL family as recognized components up to an ambient tem- perature of Ty max 10 K given by the upper temperature limit of the standard PCB material. If the full maximum am- bient temperature T, , is required with UL approval, op- tion U should be requested. It consists of an alternative PCB material with a higher maximum temperature specifi- cation. The European approval boards have in contrast to UL ac- cepted the standard PCB material to be operated up to Tx max = 71C without any further precautions. Note: As a central overvoltage protection device, the crow- bar is usuaily connected to the external load via distributed inductance of the lines. For this reason, the overvoltage at the load can temporarily exceed the trigger voltage Upc. Depending on the application, further decentralized over- voltage protection elements may have to be used addition- ally. | Shatioen Comaitions 51V qv | 4ey pave | sev. Unt | me, Oe fb amin max} min mex fp omin max | min max | min max | | Yee Trigger vottage | Umin-.-Umax 58 68/1135 16/165 19 | 27 31 | 40 455 | vi 2 0..sbonom | el Lt | Delaytime | Temn-Tome | 18 | 5 | 1H | Ks Option D (Save Data, input undervoltage monitor) Note: Output instead of input undervoltage monitor is available on request (option D1). If the input voltage LU, is below the adjustable threshold volt- age U, the control circuit for terminal D has low impedance. Terminal D and Go- are connected to a self-conducting field effect transistor (FET). A 0.5 W Zener diode provides protection against overvoltages. Fig. 11 Test circuit with definition of voltage Up and current Ip on Terminal D. The voltage U, can be externally adjusted with a trim poten- tiometer by means of a screwdriver. The hystersis Uy of U, is <2%. Terminal D stays low for a minimum time tow mins in order to prevent any oscillation. U, can be set toa value between U min and Umax according to fig. 10. It is im- portant to note that the FET can become conductive again when Up > Ui - Uy Up high I | U, bette Up low a a A A ret Ef ur Fig. 12 Definition of U, and Uy Edition 1/96 - Melcher AG MELCHER y Partners a@.. PSL-Family Switching Regulators 19" Industrial Environment Data Table 11: Option D data Characteristics | Conditions a eee ae Up ee ESS eee : | Upiow | Voltage - Terminal D at low impedance | U,< U, p<2.5 mA 0.8 Vv Upngn | Voltage - Terminal D at high impedance =. U> U+ Ub, p> 25pA 4.75 | How min | Minimum duration Up iow 30 L ms lor Response time to Ub iow 1 ps | fomac | Maximum current - Terminal D a 20 +s Application examples a) The signal Up can be utilized in battery powered systems to provide a warning in case of low batteries. b) In case of power failure, the signal can serve to initiate data save routines. Option A Test sockets Test sockets (pin @ = 2 mm) for measuring the output volt- age are located at the front panel of the module. The output voltage is measured internally directly at the connector pins. Mechanical Data SS] Dimensions in mm. Tolerances +0.3 mm unless otherwise indicated. European Projection 168.5 405 17.4 10.9 459.4 jes / 4.9 2TE Test sockets (option A) \ LED output voltage indicator Potentiometer {option P) al. + a| = +s al al N Qo S uw oO 15 173.7 205 | Mounting Plane of Measuring point of ; connector H11 Potentiometer (option D) ' case temperature Te slut | un | . ole Fig. 13 Case L04 (weight 550 g) oo CHER Edition 1/96 - Melcher AG 5-46 MEL Wwe MOTE T NEESIndustrial Environment Switching Regulators 19" PSL-Family Type Key and Product Marking Type Key PSL 128-7LiIRPCDA L | i Nominal output voltage in voit (5A > 5.1} Nominal output current in ampere ...... eee Ambient temperature range Ty = 25 TVS occ cect eteneneeneeseeeerimeeneneaey | Ty = 40...71C .. Input filter oe reeeeeeneteeeneeenteeeseeecaesanteneesneeenenees 4 InniDIt MPU cesses eseesstesseessesseseessceseesssessseessseensecsenies ! External output voltage adjustMent............ cee R Potentiometer oo. eee cccesceseeesseenctenrceeseeeaneeatearecsarennties P Thyristor-Crowball occ ccccessseecseesescnecsunereeeeneteceareeaaees "Save Data" undervoltage monitor .. Test SOCKCtS oo. ce cs eeteeetteee tenses ceerereneenaterneregseeseenennees Example:PSL 128-7LiPC = A positive switching regulator with a 12 V, 8 A output, ambient temperature range of ~25...71C, input filter, inhibit input, potentiometer and thyristor-crowbar. Produkt Marking Main face: Family designation, applicable safety approval and recognition marks, warnings, pin allocation, Melcher pat- ent nos. and company logo. Front plate: Identification of LED, optional test sockets and potentiometers. Back plate: Specific type designation, input voltage range, nominal output voltage and current, pin allocation of options and auxiliary functions and degree of protection. Rear side: Label with batch no., serial no. and data code comprising production site, modification status of the main PCB and production date. Edition 1/96 - Melcher AG MELCHER on Poriners | m