State-of-the-art technology: Diffused collector "Enhanced generation"
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BU508AF
State-of-the-art technology: Diffused collector "Enhanced generation" Stable performances versus operating temperature variation base-drive requirement Tight range operating collector current High ruggedness Fully insulated power package U.L. compliant
ISOWATT218FX
Applications
Horizontal deflection output Switch mode power supplies
Figure
Internal schematic diagram
Description
BU508AF manufactured using diffused collector planar technology adopting enhanced high voltage structure updated performance horizontal deflection stage.
Table
Device summary
Marking BU508AF Package ISOWATT218FX Packaging Tube
Order code BU508AF
August 2007
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www.st.com
Content
BU508AF
Content
Electrical ratings Electrical characteristics
Electrical characteristics (curves) Test circuits
Package mechanical data Revision history
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BU508AF
Electrical ratings
Electrical ratings
Table
Symbol VCES VCEO VEBO PTOT Vins Tstg
Absolute maximum rating
Parameter Collector-emitter voltage (VBE Collector-emitter voltage Collector-base voltage Collector current Collector peak current 5ms) Base current Total dissipation 25°C Insulation withstand voltage (RMS) from three leads external heatsink Storage temperature Max. operating junction temperature Value 1500 2500 Unit
Table
Symbol
Thermal data
Parameter Value Unit °C/W
Rthj-case Thermal resistance junction-case _max
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Electrical characteristics
BU508AF
Electrical characteristics
(Tcase 25°C unless otherwise specified) Table
Symbol ICES IEBO
Electrical characteristics
Parameter Collector cut-off current (VBE Emitter cut-off current Test conditions 1500V 1500V; 125°C Min. Typ. Max. Unit
Collector-emitter VCEO(sus) sustaining voltage VCE(sat) VBE(sat) Collector-emitter saturation voltage Base-emitter saturation voltage current gain Inductive load Storage time Fall time
100mA
4.5A 4.5A 0.1A 4.5A 4.5A
1.6A IB(on) 0.5A
VBE(off) -2.7V 16KHz LBB(off) 4.5µH
Pulsed: Pulse duration duty cycle
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BU508AF
Electrical characteristics
Electrical characteristics (curves)
Figure Safe operating area Figure Derating curve
Figure
current gain
Figure
current gain
Figure
Collector-emitter saturation voltage
Figure
Base-emitter saturation voltage
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Electrical characteristics Figure Output characteristics
BU508AF
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BU508AF
Electrical characteristics
Test circuits
Figure Power losses inductive load switching
Figure Reverse biased safe operating area
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Package mechanical data
BU508AF
Package mechanical data
order meet environmental requirements, offers these devices ECOPACK® packages. These packages have Lead-free second level interconnect. category second level interconnect marked package inner label, compliance with JEDEC Standard JESD97. maximum ratings related soldering conditions also marked inner label. ECOPACK trademark. ECOPACK specifications available www.st.com
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BU508AF
Package mechanical data
ISOWATT218FX mechanical data
Dim. Min. 15.30 22.80 26.30 43.20 4.30 24.30 14.60 1.80 3.80 3.40 5.30 2.80 3.10 1.80 0.80 0.65 1.80 10.30
Max. 5.70 3.20 3.50 2.20 1.10 0.95 2.20 11.50
5.45 15.70 10.20 23.20 26.70 44.40 4.70 24.70 2.20 4.20 3.80
7627132
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Revision history
BU508AF
Revision history
Table
Date 02-Mar-2007 14-Aug-2007
Document revision history
Revision Initial release Complete document, added curves (2.1: Electrical characteristics (curves) Changes
10/11
BU508AF
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