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MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

Order this document by MJE18002/D

Designer's Data Sheet

SWITCHMODE

NPN Bipolar Power Transistor

For Switching Power Supply Applications

The MJE/MJF18002 have an applications specific state±of±the±art die designed for use in 220 V line operated Switchmode Power supplies and electronic light ballasts. These high voltage/high speed transistors offer the following:

Improved Efficiency Due to Low Base Drive Requirements:

ÐHigh and Flat DC Current Gain h FE

ÐFast Switching

ÐNo Coil Required in Base Circuit for Turn±Off (No Current Tail)

Tight Parametric Distributions are Consistent Lot±to±Lot

Two Package Choices: Standard TO±220 or Isolated TO±220

MJF18002, Case 221D, is UL Recognized at 3500 VRMS: File #E69369

MAXIMUM RATINGS

Rating

 

Symbol

MJE18002

MJF18002

Unit

 

 

 

 

 

 

Collector±Emitter Sustaining Voltage

VCEO

 

450

Vdc

Collector±Emitter Breakdown Voltage

VCES

 

1000

Vdc

Emitter±Base Voltage

 

VEBO

 

9.0

Vdc

Collector Current Ð Continuous

IC

 

2.0

Adc

Ð Peak(1)

 

ICM

 

5.0

 

Base Current Ð Continuous

 

IB

 

1.0

Adc

Ð Peak(1)

 

IBM

 

2.0

 

RMS Isolated Voltage(2)

Test No. 1 Per Fig. 1

VISOL

Ð

 

4500

V

(for 1 sec, R.H. < 30%,

Test No. 2 Per Fig. 2

 

Ð

 

3500

 

TC = 25°C)

Test No. 3 Per Fig. 3

 

Ð

 

1500

 

Total Device Dissipation

(TC = 25°C)

PD

50

 

25

Watts

Derate above 25°C

 

 

0.4

0.2

W/°C

 

 

 

 

 

 

Operating and Storage Temperature

TJ, Tstg

 

± 65 to 150

°C

THERMAL CHARACTERISTICS

 

 

 

 

 

Rating

Symbol

MJE18002

MJF18002

Unit

 

 

 

 

 

Thermal Resistance Ð Junction to Case

RqJC

2.5

5.0

°C/W

Ð Junction to Ambient

RqJA

62.5

62.5

 

Maximum Lead Temperature for Soldering

TL

260

°C

Purposes: 1/8″ from Case for 5 Seconds

 

 

 

 

ELECTRICAL CHARACTERISTICS (TC = 25°C unless otherwise noted)

MJE18002* MJF18002*

*Motorola Preferred Device

POWER TRANSISTOR

2.0 AMPERES

1000 VOLTS

25 and 50 WATTS

CASE 221A±06

TO±220AB

MJE18002

CASE 221D±02

ISOLATED TO±220 TYPE

UL RECOGNIZED

MJF18002

Characteristic

 

Symbol

Min

Typ

Max

 

Unit

 

 

 

 

 

 

 

 

OFF CHARACTERISTICS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Collector±Emitter Sustaining Voltage (IC = 100 mA, L = 25 mH)

 

VCEO(sus)

450

Ð

Ð

 

Vdc

Collector Cutoff Current (VCE = Rated VCEO, IB = 0)

 

ICEO

Ð

Ð

100

 

mAdc

Collector Cutoff Current (VCE = Rated VCES, VEB = 0)

TC = 125°C

ICES

Ð

Ð

100

 

mAdc

Collector Cutoff Current (VCE = 800 V, VEB = 0)

TC = 125°C

 

Ð

Ð

500

 

 

 

 

 

Ð

Ð

100

 

 

 

 

 

 

 

 

 

 

Emitter Cutoff Current (VEB = 9.0 Vdc, IC = 0)

 

IEBO

Ð

Ð

100

 

mAdc

(1) Pulse Test: Pulse Width = 5.0 ms, Duty Cycle ≤ 10%.

 

 

 

 

 

(continued)

(2) Proper strike and creepage distance must be provided.

 

 

 

 

 

 

 

Designer's Data for ªWorst Caseº Conditions Ð The Designer 's Data Sheet permits the design of most circuits entirely from the information presented. SOA Limit curves Ð representing boundaries on device characteristics Ð are given to facilitate ªworst caseº design.

Preferred devices are Motorola recommended choices for future use and best overall value.

Designer's and SWITCHMODE are trademarks of Motorola, Inc.

REV 1

Motorola, Inc. 1995

MJE18002 MJF18002

ELECTRICAL CHARACTERISTICS Ð continued (TC = 25°C unless otherwise noted)

 

 

 

 

Characteristic

 

 

 

Symbol

 

Min

Typ

Max

Unit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ON CHARACTERISTICS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Base±Emitter Saturation Voltage

(IC = 0.4 Adc, IB = 40 mAdc)

 

VBE(sat)

 

Ð

0.825

1.1

Vdc

Base±Emitter Saturation Voltage

(IC = 1.0 Adc, IB = 0.2 Adc)

 

 

 

Ð

0.92

1.25

 

Collector±Emitter Saturation Voltage

 

 

 

VCE(sat)

 

 

 

 

Vdc

(IC = 0.4 Adc, IB = 40 mAdc)

 

 

@ TC = 125°C

 

 

Ð

0.2

0.5

 

(IC = 1.0 Adc, IB = 0.2 Adc)

 

 

 

 

Ð

0.2

0.5

 

 

 

@ TC = 125°C

 

 

Ð

0.25

0.5

 

 

 

 

 

 

 

 

 

 

Ð

0.3

0.6

 

 

 

 

 

 

 

 

 

 

 

 

 

DC Current Gain (IC = 0.2 Adc, VCE = 5.0 Vdc)

 

@ TC = 125°C

hFE

 

14

Ð

34

Ð

 

 

 

 

 

 

 

 

 

Ð

27

Ð

 

DC Current Gain (IC = 0.4 Adc, VCE = 1.0 Vdc)

 

@ TC = 125°C

 

 

11

17

Ð

 

 

 

 

 

 

 

 

 

 

11

20

Ð

 

DC Current Gain (IC = 1.0 Adc, VCE = 1.0 Vdc)

 

@ TC = 125°C

 

 

6.0

8.0

Ð

 

 

 

 

 

 

 

 

 

 

5.0

8.0

Ð

 

DC Current Gain (IC = 10 mAdc, VCE = 5.0 Vdc)

 

 

 

 

 

10

20

Ð

 

DYNAMIC CHARACTERISTICS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Current Gain Bandwidth (IC = 0.2 Adc, VCE = 10 Vdc, f = 1.0 MHz)

fT

 

Ð

13

Ð

MHz

Output Capacitance (VCB = 10 Vdc, IE = 0, f = 1.0 MHz)

 

 

Cob

 

Ð

35

60

pF

Input Capacitance (VEB = 8.0 V)

 

 

 

 

Cib

 

Ð

400

600

pF

Dynamic Saturation:

 

 

IC = 0.4 A

1.0 μs

 

= 125°C

VCE(dsat)

 

Ð

3.5

Ð

Vdc

 

 

 

 

@ T

 

 

Ð

8.0

Ð

 

determined 1.0 μs and

 

IB1 = 40 mA

 

C

 

 

 

 

 

 

 

 

 

 

 

 

 

Ð

1.5

Ð

 

3.0 μs after rising I

 

 

VCC = 300 V

3.0 μs

 

 

 

 

 

B1

 

 

 

 

 

@ TC = 125°C

 

 

Ð

3.8

Ð

 

reach 0.9 final IB1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ð

8.0

Ð

 

(see Figure 18)

 

 

IC = 1.0 A

1.0 μs

 

= 125°C

 

 

 

 

 

 

 

@ TC

 

 

Ð

14

Ð

 

 

 

 

 

 

 

 

 

 

 

 

 

IB1 = 0.2 A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ð

2.0

Ð

 

 

 

 

 

VCC = 300 V

3.0 μs

 

 

 

 

 

 

 

 

 

@ TC

= 125°C

 

 

Ð

7.0

Ð

 

 

 

 

 

 

 

 

 

 

 

SWITCHING CHARACTERISTICS: Resistive Load (D.C. 10%, Pulse Width = 20 μs)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Turn±On Time

 

IC = 0.4 Adc

 

@ TC = 125°C

ton

 

Ð

200

300

ns

 

 

IB1 = 40 mAdc

 

 

 

Ð

130

Ð

 

 

 

IB2 = 0.2 Adc

 

 

 

 

 

 

 

 

 

Turn±Off Time

 

 

 

 

toff

 

Ð

1.2

2.5

μs

 

VCC = 300 V

 

@ TC = 125°C

 

 

 

 

 

 

Ð

1.5

Ð

 

 

 

 

 

 

 

 

 

 

 

Turn±On Time

 

IC = 1.0 Adc

 

@ TC = 125°C

ton

 

Ð

85

150

ns

 

 

IB1 = 0.2 Adc

 

 

 

Ð

95

Ð

 

 

 

IB2 = 0.5 Adc

 

 

 

 

 

 

 

 

 

Turn±Off Time

 

 

 

 

toff

 

Ð

1.7

2.5

μs

 

 

VCC = 300 V

 

@ TC = 125°C

 

 

Ð

2.1

Ð

 

SWITCHING CHARACTERISTICS: Inductive Load (Vclamp = 300 V, VCC = 15 V, L = 200 μH)

 

 

 

 

Fall Time

 

 

IC = 0.4 Adc, IB1 = 40 mAdc,

@ TC = 125°C

tfi

 

Ð

125

200

ns

 

 

 

 

 

IB2 = 0.2 Adc

 

 

 

Ð

120

Ð

 

Storage Time

 

 

 

 

 

 

@ TC = 125°C

tsi

 

Ð

0.7

1.25

μs

 

 

 

 

 

 

 

 

 

Ð

0.8

Ð

 

Crossover Time

 

 

 

 

 

 

@ TC = 125°C

tc

 

Ð

110

200

ns

 

 

 

 

 

 

 

 

 

Ð

110

Ð

 

Fall Time

 

 

IC = 1.0 Adc, IB1 = 0.2 Adc,

@ TC = 125°C

tfi

 

Ð

110

175

ns

 

 

 

 

 

IB2 = 0.5 Adc

 

 

 

Ð

120

Ð

 

Storage Time

 

 

 

 

 

 

@ TC = 125°C

tsi

 

Ð

1.7

2.75

μs

 

 

 

 

 

 

 

 

 

Ð

2.25

Ð

 

Crossover Time

 

 

 

 

 

 

@ TC = 125°C

tc

 

Ð

200

300

ns

 

 

 

 

 

 

 

 

 

Ð

250

Ð

 

Fall Time

 

 

IC = 0.4 Adc, IB1 = 50 mAdc,

@ TC = 125°C

tfi

 

Ð

140

200

ns

 

 

 

 

 

IB2 = 50 mAdc

 

 

 

Ð

185

Ð

 

Storage Time

 

 

 

 

 

 

@ TC = 125°C

tsi

 

Ð

2.2

3.0

μs

 

 

 

 

 

 

 

 

 

Ð

2.5

Ð

 

Crossover Time

 

 

 

 

 

 

@ TC = 125°C

tc

 

Ð

140

250

ns

 

 

 

 

 

 

 

 

 

Ð

220

Ð

 

2

Motorola Bipolar Power Transistor Device Data

MJE18002 MJF18002

TYPICAL STATIC CHARACTERISTICS

 

100

 

 

 

 

100

 

 

 

 

 

TJ = 125°C

VCE = 1 V

 

 

TJ = 125°C

TJ = 25°C

VCE = 5 V

 

GAIN

 

 

 

GAIN

 

 

 

 

 

 

 

 

 

 

, DC CURRENT

 

TJ = 25°C

 

 

, DC CURRENT

TJ = ± 20°C

 

 

 

10

 

 

 

 

 

 

 

 

 

10

 

 

 

 

 

 

 

 

 

 

 

FE

 

 

 

 

FE

 

 

 

 

h

 

 

 

 

h

 

 

 

 

 

1

 

 

 

 

1

 

 

 

 

0.01

0.10

1.00

10.00

 

0.01

0.10

1.00

10.00

 

 

IC, COLLECTOR CURRENT (AMPS)

 

 

 

IC, COLLECTOR CURRENT (AMPS)

 

Figure 1. DC Current Gain @ 1 Volt

Figure 2. DC Current Gain @ 5 Volts

VCE, VOLTAGE (VOLTS)

2

 

 

 

 

10.00

 

 

 

 

TJ = 25°C

 

 

 

 

 

 

 

 

 

 

 

 

(VOLTS)

 

1.00

 

 

 

1

 

1.5 A

 

VOLTAGE,

 

 

IC/IB = 10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2 A

 

 

 

 

 

 

 

 

 

 

CE

0.10

 

 

 

 

 

 

 

 

 

 

 

 

 

1 A

 

V

 

 

 

 

 

 

 

 

 

 

 

IC/IB = 5

 

 

 

 

0.4 A

 

 

 

 

 

TJ = 25°C

 

 

 

 

 

 

 

 

 

0

IC = 0.2 A

 

 

 

 

0.01

 

 

TJ = 125°C

0.001

0.010

0.100

1.000

 

 

0.01

0.10

1.00

10.00

 

IB, BASE CURRENT (mA)

 

 

 

 

IC, COLLECTOR CURRENT (AMPS)

 

Figure 3. Collector Saturation Region

Figure 4. Collector±Emitter Saturation Voltage

VBE, VOLTAGE (VOLTS)

1.1

 

 

 

 

1000

 

 

 

1.0

 

 

 

 

 

 

Cib

TJ = 25°C

 

 

 

 

 

 

 

0.9

 

 

 

(pF)

100

 

 

f = 1 MHz

 

 

 

 

 

 

 

 

 

 

 

CAPACITANCE

 

 

 

0.8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TJ = 25°C

 

 

 

 

 

 

 

 

0.7

 

 

 

 

 

 

 

 

0.6

 

 

 

C,

10

 

 

 

 

 

 

 

 

 

Cob

TJ = 125°C

 

 

 

 

 

 

 

0.5

 

 

IC/IB = 10

 

 

 

 

 

0.4

 

 

IC/IB = 5

 

1

 

 

 

0.01

0.10

1.00

10.00

 

1

10

100

1000

 

IC, COLLECTOR CURRENT (AMPS)

 

 

 

VCE, COLLECTOR±EMITTER (VOLTS)

 

Figure 5. Base±Emitter Saturation Region

Figure 6. Capacitance

Motorola Bipolar Power Transistor Device Data

3

MJE18002 MJF18002

TYPICAL SWITCHING CHARACTERISTICS (IB2 = IC/2 for all switching)

 

2500

 

 

 

 

 

 

 

 

 

 

IB(off) = IC/2

 

 

 

 

 

 

 

2000

VCC = 300 V

 

 

 

 

 

 

 

 

PW = 20 μs

 

 

 

 

 

 

(ns)

1500

 

 

 

 

TJ = 125°C

 

(ns)

 

 

 

 

 

 

t, TIME

1000

 

IC/IB = 5

 

 

 

 

 

t, TIME

 

 

 

IC/IB = 10

 

 

 

 

TJ = 25°C

 

 

 

 

 

 

 

 

 

 

 

500

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

IC, COLLECTOR CURRENT (AMPS)

4500

 

 

 

 

 

 

 

 

4000

 

 

IC/IB = 5

 

 

IB(off) = IC/2

 

3500

 

 

 

 

VCC = 300 V

 

 

 

 

 

 

PW = 20

μ

 

 

 

 

 

 

 

s

 

3000

 

 

 

 

 

 

 

 

2500

 

 

 

 

 

TJ = 25°C

 

2000

 

 

 

 

 

TJ = 125°C

 

IC/IB = 10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1500

 

 

 

 

 

 

 

 

1000

 

 

 

 

 

 

 

 

500

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

 

 

IC, COLLECTOR CURRENT (AMPS)

 

 

Figure 7. Resistive Switching, ton

Figure 8. Resistive Switching, toff

 

3000

 

 

 

 

 

 

 

 

 

 

IB(off) = IC/2

 

 

 

 

 

 

 

 

2500

VCC = 15 V

 

 

 

IC/IB = 5

 

 

 

 

 

VZ = 300 V

 

 

 

 

 

 

 

2000

LC = 200 μH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(ns)

 

 

 

 

 

 

 

 

 

t, TIME

1500

 

 

 

 

 

 

 

 

1000

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

500

 

I

/I = 10

 

 

 

TJ = 25°C

 

 

 

 

 

C B

 

 

 

TJ = 125°C

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

 

 

 

IC, COLLECTOR CURRENT (AMPS)

 

 

 

2500

 

 

 

 

 

 

 

 

IC = 1 A

 

IB(off) = IC/2

 

 

2000

 

 

 

VCC = 15 V

 

(ns)

 

 

 

 

VZ = 300 V

 

 

 

 

 

LC = 200 μH

 

TIME

 

 

 

 

 

1500

 

 

 

 

 

 

 

 

 

 

 

, STORAGE

1000

 

 

 

 

 

 

 

 

 

 

 

si

 

 

 

 

 

 

t

500

IC = 0.4 A

 

 

 

 

 

TJ = 25°C

 

 

 

 

 

 

TJ = 125°C

 

 

0

 

 

 

 

 

 

5

7

9

11

13

15

 

 

 

hFE, FORCED GAIN

 

 

Figure 9. Inductive Storage Time, tsi

Figure 10. Inductive Storage Time

 

600

 

 

 

 

 

 

 

 

 

 

IB(off) = IC/2

 

 

 

 

 

 

 

500

VCC = 15 V

 

 

 

 

tc

 

 

 

VZ = 300 V

 

 

 

 

 

 

400

LC = 200 μH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(ns)

 

 

 

 

 

 

 

tfi

 

t, TIME

300

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tc

 

 

 

200

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

100

 

 

 

 

 

tfi

 

 

 

 

 

 

 

 

 

TJ = 25°C

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

TJ = 125°C

 

 

 

 

 

 

 

 

 

 

 

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

 

 

 

IC, COLLECTOR CURRENT (AMPS)

 

 

 

450

IB(off) = IC/2

 

 

 

 

 

 

 

400

 

 

 

tc

 

 

 

VCC = 15 V

 

 

 

 

 

 

350

VZ = 300 V

 

 

 

 

tfi

 

 

300

LC = 200 μH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(ns)

250

 

TJ = 25°C

 

 

 

 

 

 

TIME

200

 

TJ = 125°C

 

 

 

 

 

 

t,

 

 

 

 

 

 

 

 

 

 

150

 

 

 

 

 

 

tc

 

 

100

 

 

 

 

tfi

 

 

 

 

50

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

IC, COLLECTOR CURRENT (AMPS)

Figure 11. Inductive Switching, tc & tfi, IC/IB = 5

Figure 12. Inductive Switching, tc & tfi, IC/IB = 10

4

Motorola Bipolar Power Transistor Device Data

MJE18002 MJF18002

TYPICAL SWITCHING CHARACTERISTICS (IB2 = IC/2 for all switching)

 

180

 

 

 

 

 

 

 

 

 

 

250

 

 

 

 

 

 

 

 

 

IB(off) = IC/2

 

230

 

160

 

 

 

 

 

 

 

VCC = 15 V

 

210

 

 

 

 

 

 

 

 

 

VZ = 300 V

(ns)

 

140

 

 

 

 

 

 

 

LC = 200 μH

190

(ns)

 

 

 

 

 

 

 

 

 

TIME

170

 

 

 

 

IC = 0.4 A

 

 

 

 

FALL, TIME

120

 

 

 

 

 

 

 

-OVER

150

 

 

 

 

 

 

 

 

 

100

 

 

 

 

 

 

 

 

 

130

 

 

 

 

 

 

 

 

IC = 1 A

 

fi

 

 

 

 

 

 

 

 

 

CROSS

110

t

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

,

 

 

 

 

TJ = 25°C

 

 

 

 

 

 

C

90

 

80

 

 

 

 

 

 

 

T

 

 

 

 

 

 

 

 

 

 

 

 

 

TJ = 125°C

 

 

 

 

 

 

 

70

 

60

 

 

 

 

 

 

 

 

 

 

50

 

5

6

7

8

9

10

11

12

13

14

15

 

 

 

IC = 1 A

 

 

 

 

IB(off) = IC/2

 

 

 

 

 

 

 

VCC

= 15 V

 

 

 

 

 

 

 

 

 

VZ = 300 V

 

 

 

 

 

 

 

 

 

LC = 200 μH

 

 

IC = 0.4 A

 

 

 

 

 

 

 

 

 

 

TJ = 25°C

 

 

 

 

 

 

 

 

 

TJ = 125°C

 

 

 

 

 

 

 

5

6

7

8

9

10

11

12

13

14

15

hFE, FORCED GAIN

hFE, FORCED GAIN

Figure 13. Inductive Fall Time

Figure 14. Inductive Crossover Time

GUARANTEED SAFE OPERATING AREA INFORMATION

 

10.00

 

 

50 μs

10 μs 1 μs

 

 

5 ms

1 ms

(AMPS)

 

DC (MJE18002)

 

 

 

 

 

 

 

 

CURRENT

1.00

 

 

 

 

 

DC (MJF18002)

 

 

 

 

 

 

 

 

, COLLECTOR

0.10

 

 

 

 

 

 

 

 

 

C

 

 

 

 

I

 

 

 

 

 

 

0.01

 

 

 

 

 

10

 

100

 

1000

 

 

VCE, COLLECTOR±EMITTER VOLTAGE (VOLTS)

 

2.5

 

 

 

 

 

 

 

(AMPS)

2.0

 

 

 

TC 125°C

 

 

 

 

IC/IB 4

 

 

 

 

 

LC = 500 μH

 

CURRENT

 

 

 

 

 

1.5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COLLECTOR

1.0

 

 

 

 

 

 

 

0.5

 

 

 

V

BE(off)

= 0.5 V

 

,

 

 

 

 

 

 

 

C

 

 

 

0 V

 

 

 

 

I

 

 

 

 

 

 

 

 

 

 

 

 

±1.5 V

 

 

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

200

400

600

800

1000

1200

VCE, COLLECTOR±EMITTER VOLTAGE (VOLTS)

Figure 15. Forward Bias Safe Operating Area

Figure 16. Reverse Bias Switching Safe

 

Operating Area

 

1.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SECOND

 

FACTOR

0.8

 

 

 

 

 

BREAKDOWN

 

 

 

 

 

 

 

DERATING

 

0.6

 

 

 

 

 

 

 

DERATING

 

 

 

 

 

 

 

0.4

 

 

 

 

 

 

 

POWER

0.2

 

 

 

THERMAL

 

 

 

 

 

 

 

DERATING

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

20

40

60

80

100

120

140

160

 

 

 

TC, CASE TEMPERATURE (°C)

 

 

Figure 17. Forward Bias Power Derating

There are two limitations on the power handling ability of a transistor: average junction temperature and second breakdown. Safe operating area curves indicate IC±VCE limits of the transistor that must be observed for reliable operation; i.e., the transistor must not be subjected to greater dissipation than the curves indicate. The data of Figure 15 is based on TC = 25°C; TJ(pk) is variable depending on power level. Second breakdown pulse limits are valid for duty cycles to 10% but must be derated when TC > 25°C. Second breakdown limitations do not derate the same as thermal limitations. Allowable current at the voltages shown on Figure 15 may be found at any case temperature by using the appropriate curve on Figure 17. TJ(pk) may be calculated from the data in Figures 20 and 21. At any case temperatures, thermal limitations will reduce the power that can be handled to values less the limitations imposed by second breakdown. For inductive loads, high voltage and current must be sustained simultaneously during turn±off with the base to emitter junction reverse biased. The safe level is specified as a reverse biased safe operating area (Figure 16). This rating is verified under clamped conditions so that the device is never subjected to an avalanche mode.

Motorola Bipolar Power Transistor Device Data

5

Источник: https://studfile.net/preview/16503854/