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1N5300 Datasheet(PDF) 3 Page - Motorola, Inc |
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1N5300 Datasheet(HTML) 3 Page - Motorola, Inc |
3 / 5 page 1N5283 through 1N5314 Motorola TVS/Zener Device Data 9-4 1.5 Watt DC Power Data Sheet 5 4 3 2 1 0 –20 –40 –60 –80 –100 300 250 200 150 100 50 10 7 5 3 2 1 0.7 0.5 0.3 0.2 0.1 –2 –1 0 20 40 60 80 100 120 140 160 0 0.2 0.4 0.6 0.8 1 0.1 0.2 0.3 0.5 0.7 1 2 3 5 7 10 20 30 50 70 100 REVERSE FORWARD ANODE CATHODE + – ZK @ VK VL @ IL POV IP & ZT @ VT VAK, ANODE-CATHODE VOLTAGE (VOLTS) L, LEAD LENGTH (INCHES) POINT OF LEAD TEMPERATURE MEASUREMENT (MOST HEAT CONDUCTION IS THROUGH THE CATHODE LEAD) L L 1N5313 1N5309 1N5305 1N5298 1N5290 TJ = 25°C POV = 100 V (DATA OBTAINED FROM PULSE TESTS) VAK, ANODE-CATHODE VOLTAGE (VOLTS) Diode Current. Limiting Current: 80% of IP minimum used to determine Limiting voltage, VL. Pinch-off Current: Regulator current at specified Test Voltage, VT. Peak Operating Voltage: Maximum voltage to be applied to device. Current Temperature Coefficient. Anode-to-cathode Voltage. Knee Impedance Test Voltage: Specified voltage used to establish Knee Impedance, ZK. Limiting Voltage: Measured at IL, VL, together with Knee AC Impedance, ZK, indicates the Knee characteristics of the device. Test Voltage: Voltage at which IP and ZT are specified. Knee AC Impedance at Test Voltage: To test for ZK, a 90 Hz signal VK with RMS value equal to 10% of test voltage, VK, is superimposed on VK: ZK = VK/iK where iK is the resultant ac current due to VK. To provide the most constant current from the diode, ZK should be as high as possible; therefore, a minimum value of ZK is specified. AC Impedance at Test Voltage: Specified as a minimum value. To test for ZT, a 90 Hz signal with RMS value equal to 10% of Test Voltage VT, is superimposed on VT. SYMBOLS AND DEFINITIONS APPLICATION NOTE As the current available from the diode is temperature dependent, it is necessary to determine junction temperature, TJ, under specific operating conditions to calculate the value of the diode current. The following procedure is recommended: Lead Temperature, TL, shall be determined from: TL = θLA PD + TA where θLA is lead-to-ambient thermal resistance and PD is power dissipation. θLA is generally 30–40°C/W for the various clips and tie points in common use, and for printed circuit-board wiring. Junction Temperature, TJ, shall be calculated from: TJ = TL + θJL PD where θJL is taken from Figure 2. For circuit design limits of VAK, limits of PD may be estimated and extremes of TJ may be computed. Using the information on Figures 4 and 5, changes in current may be found. To improve current regulation, keep VAK low to reduce PD and keep the leads short, especially the cathode lead, to reduce θJL. Figure 1. Typical Current Regulator Characteristics Figure 2. Typical Thermal Resistance Figure 3. Typical Forward Characteristics ID — IL — IP — POV — θl — VAK — VK — VL — VT — ZK — ZT — |
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