BD235_09

BD235 BD237 Low voltage NPN power transistors Features ■ ■ Low saturation voltage NPN transistors Applications ■ Audio, power linear and switching applications 3 2 1 Description 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 type is BD238. Figure 1. SOT-32 (TO-126) Internal schematic diagram Table 1. Device summary Marking BD235 BD237 Package SOT-32 SOT-32 Packaging Tube Tube Order codes BD235 BD237 June 2009 Doc ID 4189 Rev 3 1/9 www.st.com 9 Absolute maximum ratings BD235, BD237 1 Absolute maximum ratings Table 2. Symbol VCBO VCER VCEO VEBO IC ICM PTOT Tstg TJ Absolute maximum ratings Value Parameter BD235 Collector-base voltage (IE = 0) Collector-emitter voltage (RBE = 1 kΩ) Collector-emitter voltage (IB = 0) Emitter-base voltage (IC = 0) Collector current Collector peak current (tp < ms) Total dissipation at Tcase = 25°C Storage temperature Max. operating junction temperature 60 60 60 5 2 6 25 -65 to 150 150 BD237 100 100 80 V V V V A A W °C °C Unit 2/9 Doc ID 4189 Rev 3 BD235, BD237 Electrical characteristics 2 Electrical characteristics (Tcase = 25°C; unless otherwise specified) Table 3. Symbol ICBO IEBO Electrical characteristics Parameter Collector cut-off current (IE = 0) Emitter cut-off current (IC = 0) (1) Test conditions VCB = rated VCBO VCB = rated VCBO TC= 150°C VEB = 5V IC = 100mA for BD235 for BD237 IC = 1A __ IC = 1A ___ IC = 150mA _ IC = 1A_ IB = 0.1A VCE = 2V VCE = 2V VCE = 2V Min. Typ. - Max. 0.1 2 1 Unit mA mA mA - VCEO(sus) Collector-emitter sustaining voltage (IB = 0) Collector-emitter saturation voltage Base-emitter on voltage DC current gain 60 80 - V V 0.6 1.3 V V VCE(sat)(1) VBE(on)(1) hFE(1) 40 25 - 1. Pulsed duration = 300 µs, duty cycle = 1.5 %. 2.1 Electrical characteristic (curves) Figure 2. Safe operating area Figure 3. Derating curves Doc ID 4189 Rev 3 3/9 Electrical characteristics Figure 4. DC current gain (VCE = 2 V) Figure 5. BD235, BD237 DC current gain (VCE = 4 V) Figure 6. Collector-emitter saturation voltage Figure 7. Base-emitter saturation voltage Figure 8. Base-emitter on voltage Figure 9. Resistive load switching time (on) 4/9 Doc ID 4189 Rev 3 BD235, BD237 Figure 10. Resistive load switching time (off) Electrical characteristics 2.2 Test circuit Figure 11. Resistive load switching test circuit 1. Fast electronic switch 2. Non-inductive resistor Doc ID 4189 Rev 3 5/9 Package mechanical data BD235, BD237 3 Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark. 6/9 Doc ID 4189 Rev 3 BD235, BD237 Package mechanical data Doc ID 4189 Rev 3 7/9 Revision history BD235, BD237 4 Table 4. Revision history Document revision history Revision 1 2 3 Initial release. Added: figures 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12. Minor text changes. Changes Date 11-Feb-2003 09-Jul-2007 03-Jun-2009 8/9 Doc ID 4189 Rev 3 BD235, BD237 Please Read Carefully: Information in this document is provided solely in connection with ST products. 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