BD235 BD237 NPN power transistors Features ■ . NPN transistors Applications ■ Audio, power linear and switching application Description 3 The devices are manufactured in Planar technology with “Base Island” layout. The resulting transistor shows exceptional high gain performance coupled with very low saturation voltage. The PNP types are BD236 and BD238 respectively. Table 1. 2 1 SOT-32 (TO-126) Figure 1. Internal schematic diagram Device summary Order code Marking Package Packaging BD235 BD237 BD235 BD237 SOT-32 SOT-32 Tube Tube July 2007 Rev 2 1/9 www.st.com 9 Absolute maximum ratings 1 Absolute maximum ratings Table 2. Absolute maximum ratings Symbol Value Parameter Unit BD235 BD237 VCBO Collector-base voltage (IE = 0) 60 100 V VCER Collector-emitter voltage (RBE = 1KΩ) 60 100 V VCEO Collector-emitter voltage (IB = 0) 60 80 V VEBO Emitter-base voltage (IC = 0) 5 V Collector current 2 A ICM Collector peak current (tp < ms) 6 A PTOT Total dissipation at Tcase = 25°C 25 W Tstg Storage temperature -65 to 150 °C 150 °C IC TJ 2/9 BD235 BD237 Max. operating junction temperature BD235 BD237 2 Electrical characteristics Electrical characteristics (Tcase = 25°C; unless otherwise specified) Table 3. Electrical characteristics Symbol ICBO IEBO Parameter Test Conditions Min. Typ. Max. Unit Collector cut-off current VCB = rated VCBO 0.1 mA (IE = 0) VCB = rated VCBO TC= 150°C 2 mA Emitter cut-off current (IC = 0) VEB = 5V 1 mA Collector-emitter VCEO(sus)(1) sustaining voltage (IB = 0) IC = 100mA for BD235 for BD237 60 80 V V Collector-emitter saturation voltage IC = 1A __ IB = 0.1A 0.6 V VBE(1) Base-emitter voltage IC = 1A ___ V CE = 2V 1.3 V hFE(1) DC current gain IC = 150mA _ VCE = 2V VCE = 2V IC = 1A_ VCE(sat)(1) 40 25 1. Pulsed duration = 300 ms, duty cycle ≥1.5%. 3/9 Electrical characteristics 2.1 4/9 BD235 BD237 Electrical characteristic (curves) Figure 2. Safe operating area Figure 3. Derating curves Figure 4. DC current gain Figure 5. DC current gain Figure 6. Collector-emitter saturation voltage Figure 7. Base-emitter saturation voltage BD235 BD237 2.2 Electrical characteristics Figure 8. Base-emitter on voltage Figure 9. Resistive load switching time Figure 10. Resistive load switching time Figure 11. Capacitance curves Test circuit Figure 12. Resistive load switching test circuit 1) Fast electronic switch 2) Non-inductive resistor 5/9 Package mechanical data 3 BD235 BD237 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 6/9 BD235 BD237 Package mechanical data SOT-32 (TO-126) mechanical data DIM. A mm. MIN. TYP 2.4 MAX. 2.9 B 0.64 0.88 B1 0.39 0.63 D 10.5 11.05 E 7.4 7.8 e 2.04 2.29 2.54 e1 4.07 4.58 5.08 L 15.3 P 2.9 Q Q1 16 3.2 3.8 1 1.52 H2 2.15 I 1.27 0016114E 7/9 Revision history BD235 BD237 4 Revision history Table 4. 8/9 Revision history Date Revision Changes 11-Feb-2003 1 Initial Release 09-Jul-2007 2 Figures: 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and figure 12 have been added. BD235 BD237 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. 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