BU941ZP BU941ZPFI High voltage ignition coil driver NPN power Darlington transistors Features Very rugged bipolar technology Built in clamping Zener High operating junction temperature Fully insulated package (U.L. compliant) for easy mounting 3 Applications 2 1 High ruggedness electronic ignitions Description TO-247 Figure 1. TO-3PF Internal schematic diagram The devices are bipolar Darlington transistors manufactured using Multi-Epitaxial Planar technology. They have been properly designed to be used in Automotive environment as electronic ignition power actuators. Table 1. Device summary Order code Marking Packages Packaging BU941ZP BU941ZP TO-247 Tube BU941ZPFI BU941ZPFI TO-3PF Tube January 2008 Rev 7 1/11 www.st.com 11 Absolute maximum ratings 1 BU941ZP BU941ZPFI Absolute maximum ratings Table 2. Absolute maximum ratings Value Symbol Parameter Unit BU941ZP VCEO Collector-emitter voltage (IB = 0) VEBO 350 V Emitter-base voltage (IC = 0) 5 V Collector current 15 A Collector peak current (tp < 5ms) 30 A Base current 1 A IBM Base peak current (tp < 5ms) 5 A Ptot Total dissipation at Tc 25 C Visol Insulation withstand voltage (RMS) from all three leads to external heatsink Tstg Storage temperature IC ICM IB TJ Table 3. Symbol Rthj-case 2/11 BU941ZPFI 155 65 W 2500 V -65 to 175 -65 to 175 C 175 175 C Max. operating junction temperature Thermal data Parameter Thermal resistance junction-case __max TO-247 TO-3PF Unit 0.97 2.3 C/W BU941ZP BU941ZPFI 2 Electrical characteristics Electrical characteristics (Tcase = 25C; unless otherwise specified) Table 4. Electrical characteristics Symbol Parameter Test conditions Collector cut-off current VCE = 300 V (IB = 0) VCE = 300 V Emitter cut-off current (IC = 0) VEB = 5 V VClamp(1) Clamping voltage IC = 100 mA (1) Collector-emitter saturation voltage ICEO IEBO VCE(sat) VBE(sat) (1) hFE(1) ts tf VF 350 IB = 100 mA IC = 10 A IB = 250 mA IC = 12 A IB = 300 mA IC = 8 A IB = 100 mA IC = 10 A IB = 250 mA IC = 12 A IB = 300 mA DC current gain IC = 5 A VCE = 10 V Functional test VCC = 24 V Figure 13. L = 7 mH Inductive load Storage time Fall time Diode forward voltage VCC = 12 V L = 7 mH VBE(off) = 0 V R BE = 47 VClamp = 300 V IC = 7 A IB1 = 70 mA IF = 10 A Typ. Tj = 125 C IC = 8 A Collector-emitter base voltage Min. Max. Unit 100 A 0.5 mA 20 mA 500 V 1.8 1.8 2 V V V 2.2 2.5 2.7 V V V 300 10 A 15 s 0.5 s 2.5 V 1. Pulsed duration = 300 s, duty cycle 1.5%. 3/11 Electrical characteristics 2.1 4/11 BU941ZP BU941ZPFI Electrical characteristic (curves) Figure 2. Safe operating area Figure 3. Derating curve Figure 4. DC current gain Figure 5. DC current gain Figure 6. Collector-emitter saturation voltage Figure 7. Base-emitter saturation voltage BU941ZP BU941ZPFI Figure 8. Electrical characteristics Base-emitter saturation voltage Figure 9. Base-emitter saturation voltage Figure 10. Collector-emitter saturation voltage 2.2 Test circuit Figure 11. Functional test circuit 5/11 Electrical characteristics Figure 12. Functional test waveforms Figure 13. Switching time test circuit 6/11 BU941ZP BU941ZPFI BU941ZP BU941ZPFI 3 Package mechanical data Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK(R) packages. These packages have a Lead-free second level interconnect . The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com 7/11 Package mechanical data BU941ZP BU941ZPFI TO-247 Mechanical data mm. Dim. A Min. 4.85 A1 2.20 2.60 b 1.0 1.40 b1 2.0 2.40 b2 3.0 3.40 c 0.40 0.80 D 19.85 20.15 E 15.45 15.75 e Max. 5.15 5.45 L 14.20 14.80 L1 3.70 4.30 L2 18.50 oP 3.55 oR 4.50 S 8/11 Typ 3.65 5.50 5.50 BU941ZP BU941ZPFI Package mechanical data TO-3PF mechanical data DIM. A C D D1 E F F2 G G1 H L L2 L3 L4 L5 L6 L7 N R Dia min. 5.30 2.80 3.10 1.80 0.80 0.65 1.80 10.30 mm. typ max. 5.70 3.20 3.50 2.20 1.10 0.95 2.20 11.50 5.45 15.30 9.80 22.80 26.30 43.20 4.30 24.30 14.60 1.80 3.80 3.40 10 15.70 10.20 23.20 26.70 44.40 4.70 24.70 15 2.20 4.20 3.80 7627132_C 9/11 Revision history BU941ZP BU941ZPFI 4 Revision history Table 5. 10/11 Document revision history Date Revision 03-Feb-2005 6 22-Jan-2008 7 Changes Package change from TO-218 to TO-247 and from ISOWATT218 to TO-3PF. 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