BU941 BU941P High voltage ignition coil driver NPN power Darlington transistors Features ■ Very rugged Bipolar technology ■ High operating junction temperature ■ Integrated antiparallel collector-emitter diode Applications ■ 1 3 2 High ruggedness electronic ignitions 2 1 TO-3 Description 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. Figure 1. Internal schematic diagrams for TO-3 Table 1. TO-247 for TO-247 Device summary Order codes Marking Package Packaging BU941 BU941 TO-3 Tray BU941P BU941P TO-247 Tube November 2008 Rev 3 1/12 www.st.com 12 Content BU941, BU941P Content 1 Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.1 Electrical characteristics (curves) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3 Test circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2/12 BU941, BU941P 1 Electrical ratings Electrical ratings Table 2. Absolute maximum ratings Value Symbol Parameter Unit BU941 BU941P VCES Collector-emitter voltage (VBE = 0) 500 V VCEO Collector-emitter voltage (IB = 0) 400 V VEBO Emitter-base voltage (IC = 0) 5 V Collector current 15 A Collector peak current 30 A Base current 1 A Base peak current 5 A IC ICM IB IBM PTOT Total dissipation at Tc = 25 °C Tstg Storage temperature TJ Table 3. Symbol 180 155 -65 to 200 -65 to 175 200 175 W °C Max. operating junction temperature Thermal data Parameter Rthj-case Thermal resistance junction-case max. Value Unit 0.97 °C/W 3/12 Electrical characteristics 2 BU941, BU941P Electrical characteristics (Tcase = 25 °C; unless otherwise specified) Table 4. Symbol Electrical characteristics Parameter Min. Typ. Max. Unit ICES Collector cut-off current (VBE = 0) VCE = 500 V VCE = 500 V TC = 125 °C 100 0.5 µA mA ICEO Collector cut-off current (IB = 0) VCE = 450 V VCE = 450 V TC = 125 °C 100 0.5 µA mA IEBO Emitter cut-off current (IC = 0) VEB = 5 V 20 mA VCEO(sus)(1) IC = 10 mA Collector-emitter Vclamp = 400 V sustaining voltage (IB = 0) see Figure 12 VCE(sat) (1) Collector-emitter saturation voltage IC = 8 A IC = 10 A IC = 12 A IB = 100 mA IB = 250 mA IB = 300 mA 1.6 1.8 2 V V V VBE(sat) (1) Base-emitter saturation voltage IC = 8 A IC = 10 A IC = 12 A IB = 100 mA IB = 250 mA IB = 300 mA 2.2 2.5 2.7 V V V DC current gain IC = 5 A VCE = 10 V Diode forward voltage IF = 10 A 2.5 V Functional test VCC = 24 V Vclamp = 400 V see Figure 9 Inductive Load Storage time Fall time Vclamp = 300 V IC = 7 A L = 7 mH IB = 70 mA VBE = 0 RBE = 47 Ω VCC = 12 V see Figure 11 hFE(1) VF ts tf 1. Pulsed duration = 300 µs, duty cycle ≤1.5% 4/12 Test conditions L = 10 mH 400 V 300 L = 7 mH 10 A 15 0.5 µs µs BU941, BU941P Electrical characteristics 2.1 Electrical characteristics (curves) Figure 2. Safe operating area Figure 3. DC current gain Figure 4. DC current gain Figure 5. Collector-emitter saturation voltage Figure 6. Collector-emitter saturation voltage Figure 7. Base-emitter saturation voltage 5/12 Electrical characteristics Figure 8. 6/12 Switching time inductive load BU941, BU941P BU941, BU941P 3 Test circuits Figure 9. Functional test circuit Figure 11. Switching time test circuit Test circuits Figure 10. Functional test wafeforms Figure 12. Sustaining voltage test circuit 7/12 Package mechanical data 4 BU941, BU941P Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK® 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 8/12 BU941, BU941P Package mechanical data TO-3 mechanical data mm. DIM. min. typ max. A 11.00 13.10 B 0.97 1.15 C 1.50 1.65 D 8.32 8.92 E 19.00 20.00 G 10.70 11.10 N 16.50 17.20 P 25.00 26.00 R 4.00 4.09 U 38.50 39.30 V 30.00 30.30 0015923C 9/12 Package mechanical data BU941, BU941P TO-247 Mechanical data mm. Dim. A Min. 4.85 A1 2.20 Max. 5.15 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 e 15.75 5.45 L 14.20 14.80 L1 3.70 4.30 L2 18.50 øP 3.55 3.65 øR 4.50 5.50 S 10/12 Typ 5.50 BU941, BU941P 5 Revision history Revision history Table 5. Document revision history Date Revision 21-Jun-2004 2 18-Nov-2008 3 Changes Package changed from TO-218 to TO-247 for BU941P. 11/12 BU941, BU941P Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such third party products or services or any intellectual property contained therein. UNLESS OTHERWISE SET FORTH IN ST’S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. UNLESS EXPRESSLY APPROVED IN WRITING BY AN AUTHORIZED ST REPRESENTATIVE, ST PRODUCTS ARE NOT RECOMMENDED, AUTHORIZED OR WARRANTED FOR USE IN MILITARY, AIR CRAFT, SPACE, LIFE SAVING, OR LIFE SUSTAINING APPLICATIONS, NOR IN PRODUCTS OR SYSTEMS WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY, DEATH, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE. ST PRODUCTS WHICH ARE NOT SPECIFIED AS "AUTOMOTIVE GRADE" MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER’S OWN RISK. Resale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever, any liability of ST. ST and the ST logo are trademarks or registered trademarks of ST in various countries. Information in this document supersedes and replaces all information previously supplied. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners. © 2008 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com 12/12