HIGH VOLTAGE FAST-SWITCHING POWER DARLINGTON STMicroelectronics P

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HIGH VOLTAGE FAST-SWITCHING POWER DARLINGTON STMicroelectronics P

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BU808DFI
HIGH VOLTAGE FAST-SWITCHING POWER DARLINGTON
STMicroelectronics PREFERRED SALESTYPE DARLINGTON WITH INTEGRATED ANTIPARALLEL COLLECTOR-EMITTER DIODE HIGH VOLTAGE CAPABILITY HIGH CURRENT GAIN U.L. RECOGNISED ISOWATT218 PACKAGE (U.L. FILE E81734 (N)) BASE-DRIVE REQUIREMENTS COST SPACE SAVING.
APPLICATIONS HORIZONTAL DEFLECTION COLOUR DESCRIPTION BU808DFI manufactured using Multiepitaxial Mesa technology cost-effective high performance.
ISOWATT218
INTERNAL SCHEMATIC DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Collector-Base Voltage Collector-Emitter Voltage Emitter-Base Voltage Collector Current Collector Peak Current Base Current Base Peak Current Total Dissipation orage Temperature Max. Operating Junction Temperature Value 1400
November 1998
BU808DFI
THERMAL DATA
hj-ca Thermal Resistance Junction-case
ELECTRICAL CHARACTERISTICS (Tcase unless otherwise specified)
Symb CE(sat BE(s Parameter Collector Cut-off Current Collector Cut-off Current -5V) Emitter Cut-off Current Collector-Emitter Saturation Voltage Base-Emitt Saturation Voltage Current Gain INDUCTIVE Storage Time Fall Time INDUCTIVE Storage Time Fall Time Test Cond ition 1400 1000 Min. Max.
VBEoff VBEoff
Diode orward Voltage
Pulsed: Pulse duration duty cycle
Safe Operating Area
Thermal Impedance
BU808DFI
Derating Curve Current Gain
Collector Emitter Saturation Voltage
Base Emitter Saturation Voltage
Power Losses
Switching Time Inductive Load 16KHz
BU808DFI
Switching Time Inductive Load 16KHZ Reverse Biased
BASE DRIVE INFORMATION order saturate power switch reduce conduction losses, adequate direct base current provided lowest gain (line scan phase). other hand, negative base current must provided turn power transistor (retrace phase). Most dissipation, deflection application, occurs switch-off. Therefore essential determine value which minimizes power losses, fall time and, consequently, curves have been defined give total power losses, function both scanning frequencies choosing optimum negative drive. test circuit illustrated figure Inductance serves control slope negative base current recombine excess carrier collector when base current still present, this would avoid tailing phenomenon collector current. values calculated from following equations: (IC)2 (VCEfly)2 Where operating collector current, VCEfly= flyback voltage, frequency oscillation during retrace.
BU808DFI
Figure Inductive Load Switching Test Circuits.
Figure Switching Waveforms Deflection Circuit
BU808DFI
ISOWATT218 MECHANICAL DATA
DIM. MIN. 5.35 1.88 0.75 1.05 10.8 15.8 20.8 19.1 22.8 40.5 4.85 20.25 TYP. MAX. 5.65 2.08 1.25 11.2 16.2 21.2 19.9 23.6 42.5 5.25 20.75 MIN. 0.210 0.130 0.114 0.074 0.029 0.041 0.425 0.622 0.818 0.752 0.897 1.594 0.190 0.797 0.137 0.082 0.181 inch TYP. MAX. 0.222 0.149 0.122 0.081 0.039 0.049 0.441 0.637 0.834 0.783 0.929 1.673 0.206 0.817 0.145 0.090
P025C
BU808DFI
Information furnished believed accurate reliable. However, STMicroelectronics assumes responsibility consequences such information infringement patents other rights third parties which result from use. license granted implication otherwise under patent patent rights STMicroelectronics. Specification mentioned this publication subject change without notice. This publication supersedes replaces information previously supplied. STMicroelectronics products authorized critical components life support devices systems without express written approval STMicroelectronics. logo registered trademark STMicroelectronics 1998 STMicroelectronics Printed Italy Rights Reserved STMicroelectronics GROUP COMPANIES Australia Brazil Canada China France Germany Italy Japan Korea Malaysia Malta Mexico Morocco Netherlands Singapore Spain Sweden Switzerland Taiwan Thailand United Kingdom U.S.A. http://www.st.com

HIGH VOLTAGE FAST-SWITCHING POWER DARLINGTON STMicroelectronics P

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