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BUL743STN/a50avaiHigh voltage fast-switching NPN power transistor


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C25P20FR , LOW FORWARD VOLTAGE DROP
C25P40FR , LOW FORWARD VOLTAGE DROP
C2611 , Collector-emitter Voltage: V(BR)CEO=400V, Collector Current: IC=0.2A
C2611 , Collector-emitter Voltage: V(BR)CEO=400V, Collector Current: IC=0.2A
C2611 , Collector-emitter Voltage: V(BR)CEO=400V, Collector Current: IC=0.2A
C2625 , 700/800 WATTS (AC) DC/D CSINGLE OUTPUT


BUL743
High voltage fast-switching NPN power transistor

BUL743

High voltage fast-switching
NPN power transistor
Features
Low spread of dynamic parameters High voltage capability Minimum lot-to-lot spread for reliable operation Very high switching speed
Applications
Electronic ballast for fluorescent lighting up to
256 W (8 x 32 W) Switch mode power supplies
Description

The device is manufactured using the diffused
collector in planar technology adopting new and
enhanced high voltage structure. It has an
intrinsic ruggedness which enables the transistor
to withstand an high collector current level during
breakdown condition, without using the transil
protection usually necessary in typical converters
for lamp ballast.

Figure 1. Internal schematic diagram
Table 1. Device summary

Electrical ratings BUL743
1 Electrical ratings
Table 2. Absolute maximum ratings
Table 3. Thermal data
BUL743 Electrical characteristics

2 Electrical characteristics

(Tcase = 25 °C unless otherwise specified)
Table 4. Electrical characteristics
Pulsed duration = 300 µs, duty cycle ≤ 1.5%

Electrical characteristics BUL743
2.1 Electrical characteristics (curves)


Figure 2. Safe operating area Figure 3. Derating curve
Figure 4. DC current gain (VCE = 3 V) Figure 5. DC current gain (VCE = 5 V)
Figure 6. Collector-emitter saturation
voltage
Figure 7. Base-emitter saturation voltage
BUL743 Electrical characteristics

Figure 8. Output characteristics Figure 9. Reverse biased safe operating area
Figure 10. Resistive load switching time (on) Figure 11. Resistive load switching time (off)

Electrical characteristics BUL743
2.2 Test circuits
Figure 12. Energy rating test circuit
Figure 13. Resistive load switching test circuit
Fast electronic switch Non-inductive resistor
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