BU508DFI high voltage fast-switching npn power transistor n stmicroelectronics preferred salestype n high voltage capability ( > 1500 v ) n npn transistor with integrated freewheeling diode n fully insulated package (u.l. compliant) for easy mounting applications: n horizontal deflection for colour tv up to 25" description the BU508DFI is manufactured using multiepitaxial mesa technology for cost-effective high performance and uses a hollow emitter structure to enhance switching speeds. internal schematic diagram april 2002 absolute maximum ratings symbol parameter value unit v ces collector-emitter voltage (v be = 0) 1500 v v ceo collector-emitter voltage (i b = 0) 700 v v ebo emitter-base voltage (i c = 0) 10 v i c collector current 8 a i cm collector peak current (t p < 5 ms) 15 a i b base current 5 a i bm base peak current (t p < 5 ms) 8 a p tot total dissipation at t c = 25 o c50w v isol insulation withstand voltage (rms) from all three leads to exernal heatsink 2500 v t stg storage temperature -65 to 150 o c t j max. operating junction temperature 150 o c isowatt218 1 2 3 ? 1/6
thermal data r thj-case thermal resistance junction-case max 2.5 o c/w electrical characteristics (t case = 25 o c unless otherwise specified) symbol parameter test conditions min. typ. max. unit i ces collector cut-off current (v be = 0) v ce = 1500 v v ce = 1500 v t j = 125 o c 1 2 ma ma i ebo emitter cut-off current (i c = 0) v eb = 5 v 300 ma v ceo(sus) * collector-emitter sustaining voltage (i b = 0) i c = 100 m a 700 v v ce(sat) * collector-emitter saturation voltage i c = 4.5 a i b = 2 a 1 v v be(sat) * base-emitter saturation voltage i c = 4.5 a i b = 2 a 1.3 v t s t f inductive load storage time fall time i c = 4.5 a h fe = 2.5 v cc = 140 v l c = 0.9 mh l b = 3 m h (see figure 1) 7 550 m s ns v f diode forward voltage i f = 4 a 2 v f t transition frequency i c = 0.1 a v ce = 5 v f = 5 mhz 7 mhz * pulsed: pulse duration = 300 m s, duty cycle 1.5 % safe operating area thermal impedance BU508DFI 2/6
derating curve collector emitter saturation voltage switching time inductive load dc current gain base emitter saturation voltage switching time inductive load BU508DFI 3/6
figure 1: inductive load switching test circuit. switching time percentance vs. case BU508DFI 4/6
dim. mm inch min. typ. max. min. typ. max. a 5.35 5.65 0.211 0.222 c 3.30 3.80 0.130 0.150 d 2.90 3.10 0.114 0.122 d1 1.88 2.08 0.074 0.082 e 0.75 0.95 0.030 0.037 f 1.05 1.25 0.041 0.049 f2 1.50 1.70 0.059 0.067 f3 1.90 2.10 0.075 0.083 g 10.80 11.20 0.425 0.441 h 15.80 16.20 0.622 0.638 l 9 0.354 l1 20.80 21.20 0.819 0.835 l2 19.10 19.90 0.752 0.783 l3 22.80 23.60 0.898 0.929 l4 40.50 42.50 1.594 1.673 l5 4.85 5.25 0.191 0.207 l6 20.25 20.75 0.797 0.817 n 2.1 2.3 0.083 0.091 r 4.6 0.181 dia 3.5 3.7 0.138 0.146 p025c/a isowatt218 mechanical data - weight : 4.9 g (typ.) - maximum torque (applied to mounting flange) recommended: 0.8 nm; maximum: 1 nm - the side of the dissipator must be flat within 80 m m BU508DFI 5/6
information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsib ility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectroni cs. specifi cation mentio ned in this publication are subject to change without notice. this publication supersedes and replaces all in formation previou sly supplied. stmicroe lectron ics products are not authorized for use as critical components in life support devices or systems without express written approval of stmicroelectron ics. the st logo is a trademark of stmicroelectronics ? 2002 stmicroelectronics C pr inted in italy C all rights reserved stmicroelectronics group of companies australia - brazil - canada - china - finland - france - germany - hong kong - india - israel - italy - japan - malaysia - malt a - morocco - singapore - spain - sweden - switzerland - united kingdom - united states. http://www.st.com BU508DFI 6/6
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