Fairchild Semiconductor IRFS720B, IRF720B Datasheet

IRF720B/IRFS720B

400V N-Channel MOSFET

IRF720B/IRFS720B

November 2001

General Description

These N-Channel enhancement mode power field effect
transistors are produced using Fairchild’s proprietary,
planar, 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

Features

• 3.3A, 400V, R

• Low gate charge ( typical 14 nC)

• Low Crss ( typical 11 pF)

• Fast switching

• 100% avalanche tested

• Improved dv/dt capability

= 1.75Ω @VGS = 10 V

DS(on)

suited for high efficiency switch mode power supplies and
electronic lamp ballasts based on half bridge.

D

G

G

SD

TO-220

IRF Series

GSD

TO-220F

IRFS Series

S

Absolute Maximum Ratings T

= 25°C unless otherwise noted

C

Symbol Parameter IRF720B IRFS720B Units

V

DSS

I

D

I

DM

V

GSS

E

AS

I

AR

E

AR

dv/dt Peak Diode Recovery dv/dt
P

D

Drain-Source Voltage 400 V
Drain Current

- Continuous (T

- Continuous (T

Drain Current - Pulsed

= 25°C)

C

= 100°C)

C

(Note 1)

3.3 3.3 * A

2.1 2.1 * A

13.2 13.2 * A
Gate-Source Voltage ± 30 V
Single Pulsed Avalanche Energy
Avalanche Current
Repetitive Avalanche Energy

Power Dissipation (TC = 25°C)

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

240 mJ

3.3 A

4.9 mJ

5.5 V/ns

49 33 W

- Derate above 25°C 0.39 0.27 W/°C

T

, T

J

STG

T

L

* Drain current limited by maximum junction temperature

Operating and Storage Temperature Range -55 to +150 °C
Maximum lead temperature for soldering purposes,
1/8" from case for 5 seconds

300 °C

Thermal Characteristics

Symbol Parameter IRF720B IRFS720B Units

R

θJC

R

θCS

R

θJA

©2001 Fairchild Semiconductor Corporation

Thermal Resistance, Junction-to-Case Max. 2.57 3.74 °C/W
Thermal Resistance, Case-to-Sink Typ. 0.5 -- °C/W
Thermal Resistance, Junction-to-Ambient Max. 62.5 62.5 °C/W

Rev. A, November 2001

IRF720B/IRFS720B

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

= 400 V, VGS = 0 V

DS

V

= 320 V, TC = 125°C

DS

V

= 30 V, VDS = 0 V

GS

= -30 V, VDS = 0 V

V

GS

400 -- -- V

-- 0.4 -- V/°C

-- -- 10 µA

-- -- 100 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 = 1.65 A

V

GS

= 40 V, ID = 1.65 A

V

DS

(Note 4)

2.0 -- 4.0 V

-- 1.4 1.75 Ω

-- 2.8 -- S

Dynamic Characteristics

C

iss

C

oss

C

rss

Input Capacitance
Output Capacitance -- 55 72 pF
Reverse Transfer Capacitance -- 11 15 pF

= 25 V, VGS = 0 V,

V

DS

f = 1.0 MHz

-- 460 600 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 -- 35 80 ns
Turn-Off Delay Time -- 35 80 ns
Turn-Off Fall Time -- 35 80 ns
Total Gate Charge
Gate-Source Charge -- 2.7 -- nC
Gate-Drain Charge -- 5.6 -- nC

= 200 V, ID = 3.3 A,

V

DD

= 25 Ω

R

G

V

= 320 V, ID = 3.3 A,

DS

V

GS

= 10 V

(Note 4, 5)

(Note 4, 5)

-- 10 3 0 ns

-- 14 1 8 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 = 39mH, IAS = 3.3A, VDD = 50V, RG = 25 Ω, Starting TJ = 25°C

3. ISD ≤ 3.3A, di/dt ≤ 300A/µs, VDD ≤ BV

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

5. Essentially independent of operating temperature

©2001 Fairchild Semiconductor Corporation

Maximum Continuous Drain-Source Diode Forward Current -- -- 3.3 A
Maximum Pulsed Drain-Source Diode Forward Current -- -- 13.2 A

= 0 V, IS = 3.3 A

Drain-Source Diode Forward Voltage
Reverse Recovery Time
Reverse Recovery Charge -- 1.36 -- µC

Starting TJ = 25°C

DSS,

V

GS

= 0 V, IS = 3.3 A,

V

GS

/ dt = 100 A/µs

dI

F

-- -- 1.5 V

-- 220 -- ns

(Note 4)

Rev. A, November 2001

Typical Characteristics

IRF720B/IRFS720B

V

1

Top : 1 5 .0 V

10.0 V

8.0 V

7.0 V

6.5 V

6.0 V

5.5 V
Botto m : 5.0 V

0

-1

-1

10

GS

!

Note s :

1. 25 0$s Pulse Test

"

2. TC = 25

0

10

1

10

10

10

, Drain Current [A]

D

I

10

VDS, Drain-Source Voltage [V]

7

6

5

],

#

[

4

DS(ON)

R

3

Drain-Source On-Resistance

2

1

036912

VGS = 10V

VGS = 20V

!

Note : T

"

= 25

J

ID, Drain Current [A]

1

10

150oC

0

10

25oC

, Drain Current [A]

D

I

-1

10

246810

-55oC

!

Note s :

= 40V

1. V

DS

2. 25 0$s Pulse Test

VGS, Gate-Source Voltage [V]

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

1

10

0

10

"

150

"

, Reverse Drain Current [A]

DR

I

-1

10

0.2 0.4 0.6 0.8 1.0 1.2 1.4

25

!

Note s :

= 0V

1. V

GS

2. 250$s Pulse Te st

VSD, Source-Drain voltage [V]

Figure 3. On-Resistance Variation vs

Drain Current and Gate Voltage

Figure 4. Body Diode Forward Voltage

Variation with Source Current

and Temperature

1000

800

600

400

Capacitance [pF]

200

0

-1

10

VDS, Drain-Source Voltage [V]

C

= Cgs + Cgd (Cds = shorted)

iss

C

= Cds + C

oss

gd

C

= C

rss

gd

C

iss

C

oss

C

rss

0

10

10

1

!

Note s :

= 0 V

1. V

GS

2. f = 1 MHz

12

10

8

6

4

, Gate-Source Voltage [V]

GS

2

V

0

0 3 6 9 12 15

QG, Tota l G a te C h a rg e [n C ]

VDS = 80V

VDS = 200V

VDS = 320V

!

Note : I

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

= 3.3 A

D

Rev. A, November 2001©2001 Fairchild Semiconductor Corporation