Fairchild Semiconductor FQA70N08 Datasheet

FQA70N08

FQA70N08

80V N-Channel MOSFET

August 2000

QFET

QFET

QFETQFET

TM

General Description

These N-Channel enhancement mode power field effect
transistors are produced using Fairchild’s proprietary,
planar stripe, DMOS technology.
This advanced technology has been especially tailored to
minimize on-state resistance, provide superior switching
performance, and withstand high energy pulse in the
avalanche and commutation mode. These devices are well
suited for low voltage applications such as automotive, high
efficiency switching for DC/DC converters, and DC mo tor
control.

G

SD

Absolute Maximum Ratings T

Symbol Parameter FQA70N08 Units

V

DSS

I

D

I

DM

V

GSS

E

AS

I

AR

E

AR

dv/dt Peak Diode Recovery dv/dt
P

D

T

, T

J

STG

T

L

Drain-Source Voltage 80 V
Drain Current

Drain Current - Pulsed
Gate-Source Voltage ± 25 V
Single Pulsed Avalanche Energy
Avalanche Current
Repetitive Avalanche Energy

Power Dissipation (TC = 25°C)

Operating and Storage Temperature Range -55 to +175 °C
Maximum lead temperature for soldering purposes,
1/8" from case for 5 seconds

- Continuous (T

- Continuous (T

- Derate above 25°C 1.27 W/°C

TO-3P

FQA Series

= 25°C unless otherwise noted

C

= 25°C)

C

= 100°C)

C

Features

• 77.5A, 80V, R

• Low gate charge ( typical 75 nC)

• Low Crss ( typical 180 pF)

• Fast switching

• 100% avalanche tested

• Improved dv/dt capability

• 175°C maximum junction temperature rating

(Note 1)

(Note 2)
(Note 1)
(Note 1)
(Note 3)

= 0.017Ω @VGS = 10 V

DS(on)

D

!

!

"

"

"

"

!

!

"

!

!

G

"
"

"

!

!

S

77.5 A

54.8 A
310 A

1150 mJ

77.5 A

19 mJ

6.5 V/ns

190 W

300 °C

Thermal Characteristics

Symbol Parameter Typ Max Units

R

θJC

R

θCS

R

θJA

©2000 Fairchild Semiconductor International

Thermal Resistance, Junction-to-Case -- 0.79 °C/W
Thermal Resistance, Case-to-Sink 0.24 -- °C/W
Thermal Resistance, Junction-to-Ambient -- 40 °C/W

Rev. A, August 2000

FQA70N08

Electrical Characteristics T

= 25°C unless otherwise noted

C

Symbol Parameter Test Conditions Min Typ Max Units

Off Characteristics

BV

DSS

∆BV

DSS

/ ∆T
I

DSS

I

GSSF

I

GSSR

Drain-Source Breakdown Voltage
Breakdown Voltage Temperature

Coefficient

J

Zero Gate Voltage Drain Current
Gate-Body Leakage Current, Forward

Gate-Body Leakage Current, Reverse

= 0 V, ID = 250 µA

V

GS

I

= 250 µA, Referenced to 25°C

D

V

= 80 V, VGS = 0 V

DS

V

= 64 V, TC = 150°C

DS

V

= 25 V, VDS = 0 V

GS

= -25 V, VDS = 0 V

V

GS

80 -- -- V

-- 0.08 -- V/°C

-- -- 1 µA

-- -- 10 µA

-- -- 100 nA

-- -- -100 nA

On Characteristics

V
R

g

FS

GS(th)

DS(on)

Gate Threshold Voltage
Static Drain-Source

On-Resistance
Forward Transconductance

V

= VGS, ID = 250 µA

DS

= 10 V, ID = 38.75 A

V

GS

= 30 V, ID = 38.75 A

V

DS

(Note 4)

2.0 -- 4.0 V

-- 0.013 0.017 Ω

-- 43 -- S

Dynamic Characteristics

C

iss

C

oss

C

rss

Input Capacitance
Output Capacitance -- 790 1030 pF
Reverse Transfer Capacitance -- 180 230 pF

= 25 V, VGS = 0 V,

V

DS

f = 1.0 MHz

-- 2100 2700 pF

Switching Characteristics

t

d(on)

t

r

t

d(off)

t

f

Q
Q
Q

g
gs
gd

Turn-On Delay Time
Turn-On Rise Time -- 300 610 ns
Turn-Off Delay Time -- 90 190 ns
Turn-Off Fall Time -- 145 3 0 0 n s
Total Gate Charge
Gate-Source Charge -- 14 -- nC
Gate-Drain Charge -- 37 -- nC

= 40 V, ID = 70 A,

V

DD

= 25 Ω

R

G

V

= 64 V, ID = 70 A,

DS

V

GS

= 10 V

(Note 4, 5)

(Note 4, 5)

-- 25 60 ns

-- 75 98 nC

Drain-Source Diode Characteristics and Maximum Ratings

I

S

I

SM

V

SD

t

rr

Q

rr

Notes:

1. Repetitive Rating : Pulse width limited by maximum junction temperature

2. L = 0.265mH, IAS = 77.5A, VDD = 25V, RG = 25 Ω, Starting TJ = 25°C

3. ISD ≤ 70A, di/dt ≤ 300A/µs, VDD ≤ BV

4. Pulse Test : Pulse width ≤ 300µs, Duty cycle ≤ 2%

5. Essentially independent of operating temperature

©2000 Fairchild Semiconductor International

Maximum Continuous Drain-Source Diode Forward Current -- -- 77.5 A
Maximum Pulsed Drain-Source Diode Forward Current -- -- 310 A

= 0 V, IS = 77.5 A

Drain-Source Diode Forward Voltage
Reverse Recovery Time
Reverse Recovery Charge -- 250 -- nC

Starting TJ = 25°C

DSS,

V

GS

= 0 V, IS = 70 A,

V

GS

/ dt = 100 A/µs

dI

F

-- -- 1.5 V

-- 84 -- ns

(Note 4)

Rev. A, August 2000

Typical Characteristics

FQA70N08

V

GS

Top : 15.0 V

10.0 V

8.0 V

2

10

7.0 V

6.0 V

5.5 V

5.0 V
Bottom : 4.5 V

1

10

, Drain Current [A]

D

I

0

10

-1

10

0

10

※

Notes :

1. 250μs Pulse Te st

2. TC = 25

VDS, Drain - S ou r ce V o lta g e [V ]

0.06

0.05

0.04

],

Ω

[

0.03

DS(on)

R

0.02

Drain-Source On-Resistance

0.01

0.00
0 70 140 210 280 350

VGS = 10V

VGS = 20V

ID , Drai n Curren t [A]

※

℃

10

Note : T

2

10

1

℃

175

10

℃

25

0

10

, Drain Current [A]

D

I

-1

1

10

246810

℃

-55

※

Notes :

1. V

= 30V

DS

2. 250μs Pulse Test

VGS, Gate-Source V oltage [V]

Figure 2. Transfer CharacteristicsFigure 1. On-Region Char act er i stic s

2

10

1

℃

= 25

J

10

0

10

℃

175

, Reverse Drain Current [A]

DR

I

-1

10

0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8

℃

25

※

Notes :

= 0V

1. V

GS

2. 250μs Pulse Test

VSD, Sou r c e-Drain voltage [V]

Figure 3. On-Resistance Variati on vs.

Drain Current and Gate Voltage

Figure 4. Body Diode Forward Voltage

Variation vs. Source Current

and Temperature

VDS = 40V

VDS = 64V

※

Note : I

C

= Cgs + Cgd (Cds = shorted)

6000

5000

4000

3000

2000

Capacitance [pF]

1000

0

-1

10

0

10

iss

= Cds + C

C

oss

gd

C

= C

rss

gd

※

Notes :

= 0 V

1. V

10

1

GS

2. f = 1 MHz

C

iss

C

oss

C

rss

VDS, Drain-Source Voltage [V]

12

10

8

6

4

, Ga te - Sourc e Vo lta ge [V]

2

GS

V

0

0 1020304050607080

QG, Tota l Gate C harge [n C]

Figure 5. Capacitance C haracteristics Figure 6. Gate Charge Characteristics

D

= 70A

Rev. A, August 2000©2000 Fairchild Semiconductor International