MDA922-1 (suicon) thru MDA922-9 Designers Data Sheet ee - SINGLE-PHASE MINIATURE INTEGRAL DIODE ASSEMBLIES FULL-WAVE BRIDGE . . passivated, diffused-silicon dice interconnected and transfer 1.8 AMPERES molded into voidiess hybrid rectifier circuit assemblies. 25 1000 VOLTS @ Large Inrush Surge Capability 100 A (For 1.0 Cycle) Efficient Thermal Management Provides Maximum Power Handling in Minimum Space Designers Data for Worst Case Conditions The Designers DataSheet permits the design of most circuits entirely from the information presented. Limit curves representing boundaries on device characteristics are given to facilitate worst case design. MAXIMUM RATINGS Rating (Per Leg) Symbol |-1]-2|-3 |-4 |-5 ]/-6 |-7 |-8 | -9 [Unit Peak Repetitive Reverse Voltage| VaR Working Peak Reverse Voltage | VRwM | 255011001200 1300 |400|600|800 {1000} Voits IOC Blocking Voltage VR IDC Output Voltage Resistive Load Vde 15 130| 62 |124 (185 |250/380/500 ; 620 | Volts Capacitative Load Vde 25}50| 100 {200 |300 {400/600 [800 |1000) Voits Sine Wave AMS Input Voltage | VA(RMS} 118135 | 70 11401210 }280|420 {560 | 700 Volts Average Rectified Forward Current (single phase bridge Ig 18 Amp| resistive load, 60 Hz, see Figure 6, Ta = 55C) INon--Repetitive Peak Surge Current, (see Figure 2) rated | Tye lesm 60 (for 1 cycle} Amp no road, 7) 225C. 100 (tor 1 eyele) L [7 At KE ie renee renege | Ta Ta $510475 | |p ft ELECTRICAL CHARACTERISTICS | - \- Characteristic Symboi Max Unit I FE Maximum instantaneous Forward Voltage Drop Ve 4.1 Volts SEATING PLANE (Per Leg) (Ip = 0.75 Amp, Ty = 25C) Figure 1 Maximum Reverse Current {Rated de Voltage ip 20 BA across ac terminals, Ty = 25C) THERMAL CHARACTERISTICS) Characteristic Symbol Max Unit Thermal Resistance, Junction to Ambient {Full-Wave Bridge Operation, Resa 40 cw Typical Printed Circuit Board Mounting) MECHANICAL CHARACTERISTICS CASE: Transfer-moided plastic encapsulation. MOUNTING POSITION: Any POLARITY: Terminal-designation ernbossed WEIGHT: 1.0 gram (approx) on case +DC output TERMINALS: Readily solderable ~DC output connections, corrosion resistant. CASE 216 ~AC input 262 MDA922-1 thru MDA922-9 (continued) FIGURE 1 FORWARD VOLTAGE (PER LEG) Ty = 250C Ig, INSTANTANEDUS FORWARD CURRENT (AMP) 05 10 15 2.0 25 3.0 3.5 4.0 Ve, INSTANTANEOUS FORWARD VOLTAGE (VOLTS) FIGURE 4 TYPICAL THE TYPICAL PRINTED a 25 ~ CIRCUIT BOARD EN MOUNTING. LEAD zz 0.2 LENG = 1/4 INCH Se we o) a= au aio = = 0.05 ah =e SG ye S 2 nN 0.01 0.002 0.02 0.05 0.2 0.005 0.01 0.1 06 1, TIME OR PULSE 263 FIGURE 2 - MAXIMUM SURGE CAPABILITY APPLIED AT NO LOAD CONDITIONS (Ty = VeRM APPLIED AFTER SURGE SURGE APPLIED AT RATED LOAD CONDITIONS (Ty = 175C) VRRM APPLIED AFTER SURGE IgM, PEAK SURGE CURRENT (AMP) 2.0 5.0 10 20 50 100 NUMBER QF CYCLES AT 60 Hz FIGURE 3 ~ FORWARD VOLTAGE TEMPERATURE COEFFICIENT TYPICAL RANGE COEFFICIENT (mvV/C) , O01 0.2 o5 610 2.0 5.0 iG 20 50 100 Ip. INSTANTANEOUS FORWARD CURRENT (AMP} RMAL RESPONSE Raja = WTYP RJA = 40CW MAX RugAcn = dt) Raga Tyipk} TA = Ry Jal Lat 20 5.0 20 56 100 200 WIOTH (SECONDS) MDA922-1 thru MDA922-9 (continued) FIGURE 5 POWER DISSIPATION RESISTIVE INDUCTIVE LOADS FULL WAVE BRIDGE OPERATION (la = 1g) Pr, TOTAL POWER DISSIPATION (WATTS} Q 0.4 0.8 1.2 1.6 2.0 24 28 3.2 No, avg), DC OUTPUT CURRENT (AMP) FIGURE 6 CURRENT DERATING FULL WAVE OPERATION (la = Ip) Ig, DC OUTPUT CURRENT (AMP) GQ 2040 60 80 6100 6120 +=:140:160)=S 180.200 Ta, AMBIENT TEMPERATURE (C) FIGURE 7 BASIC CIRCUIT USES FOR BRIDGE RECTIFIERS CIRCUIT A CIRCUIT B APPLICATION NOTE The Data of Figure 4 applies for typical wire terminal or printed circuit board mounting conditions in still air. Under these or simi- tar conditions, the thermal resistance between the diode junctions and the leads at the edge of the case is a small fraction of the ther- mal resistance from junction to ambient. Consequently, the lead temperature is very close to the junction temperature, Therefore, it is recommended that the lead termperature be measured when the diodes are operating in prototype equipment, in order to determine if operation is within the diode temperature ratings. The lead having the highest thermal resistance to the ambient will yield readings closest to the jynction temperature. By measuring temperature as outlined, variations of junction to ambient thermal resistance, caused by the amount of surface area of the terminals or printed circuit board and the degree of air convection, as well as proximity of other heat sources cease to be important design considerations. Bridge rectifiers are used in two basic circuit configurations as shown by circuits A and B of Figure 7. The current derating data of Figure 6 appiies to the standard bridge circuit (A), where ta = Ig. The derating data considers the thermal response of the junction and is based upon the criteria that the junction temperature must not exceed rated Ty(max) when peak reverse voltage is applied. However, because of the slow thermal response and the close ther- ma! coupling between the individual semiconductor die in the MBA922 assembly, the maximum ambient temperature is given closely by Ta = Ty(max) Raga PT where Py is the total average power dissipation in the assembly. For the circuit of Figure B, use of the above formula will yield suitable rating information, For example to determine Taimax) for the conditions: Ip, = 2.0A, pK = 8.0 bayg 1p = 1.0A, pK = 18 tayg From Figure 5: For la, read Ppa = 4.2W For Ip, read Pty = 2.2W Pr = (Pra t+ Pg) + 2=3.2W (Division by 2 is necessary as data from Figure 5 is for full wave bridge operation.) .. Ta(max) = 175 - (40) (3.2) = 47C, MDAQ922-1 thru MDA922-9 (continued) TYPICAL DYNAMIC CHARACTERISTICS (PER LEG} FIGURE 8 FORWARD RECOVERY TIME 20 Ty = 250 f SP 2s am Oo Vir= 1.0V Ss bw Se nu tir, FORWARD RECOVERY TIME {us} 01 04 a2 03 05 0.7 10 20 3.0 $0 7.0 10 Ig, FORWARD CURRENT (AMP) FIGURE 10 ~ RECTIFICATION WAVEFORM EFFICIENCY 1.0 OATA NORMALIZED 07 TO 1.0 kHz VALUE RED DATA = Ty = 1750 CURRENT INPUT WAVEFORM 0.2 o, EFFICIENCY FACTOR .0 7.0 10 Gt 1.0 2.0 3.0 20 30) 60-70 100 200 REPETITION FREQUENCY (kHz) ty, REVERSE RECOVERY TIME (us) C, CAPACITANCE (pF) FIGURE 9 REVERSE RECOVERY TIME cit =a Ty = 259C Q1<Ip <1 Ir 01 a2 03 05 0.7 1.0 20 3.0 5.0 7.0 10 In/e, GRIVE CURRENT RATIO FIGURE 11 CAPACITANCE RECJIFIER EFFICIENCY NOTE FIGURE 12 SINGLE-PHASE FULL-WAVE BRIDGE RECTIFIER CIRCUIT \ The rectification efficiency factor a shown in Figure 10 was calculated using the formula: V2, (de) Pidel Ri o= - =a Pirms) v2q(rms) _ V2 (de) -~- + 100% (1) V2olac) + V2 (de) Rt For a sine wave input Vm sin (wt) to the diode, assumed lossless, the maximum theoretical efficiency factar becomes: 265 05 61.0 5.0 20 50 100 VR, REVERSE VOLTAGE (VOLTS) 4V2m r2Ry 8 F(sine) = > 100% = -- 100% = 81.2% (2) v2, n2 2R l V2 For a square wave input of amplitude Vip, _ RL - / the efficiency factor ?(square) = a + 100% = 100% (3) becomes: Vem RL As the frequency of the input signal is increased, the reverse recovery time of the diode (Figure 9} becomes significant, result- ing in an increasing ac voltage component across RL which is opposite in polarity to the forward current, thereby reducing the vatue of the efficiency factor a, as shown on Figure 10. It should be emphasized that Figure 10 shows waveform effi- ciency only; it does not provide a measure of diode losses, Data was obtained by measuring the ac component of Vo with a true rms ac voltmeter and the dc component with a dc voltmeter. The data was used in Equation 1? to abtain points for Figure ta.