Fairchild FQT7N10L service manual

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FQT7N10L

100V LOGIC N-Channel MOSFET

FQT7N10L

May 2001

TM

QFET

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 high efficiency

Features

• 1.7A, 100V, R

• Low gate charge ( typical 4.6 nC)

• Low Crss ( typical 12 pF)

• Fast switching

• Improved dv/dt capability

• Low level gate drive requirments allowing
direct operationfrom logic drives

= 0.35Ω @VGS = 10 V

DS(on)

switching DC/DC converters, and DC motor control.

D

!

!

!

!

"

"

"

"

"

"
"

"

!

!

S

D

G

Absolute Maximum Ratings T

S

SOT-223

FQT Series

= 25°C unless otherwise noted

C

!

!

G

Symbol Parameter FQT7N10L 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 100 V
Drain Current

- Continuous (T

- Continuous (T

Drain Current - Pulsed

= 25°C)

C

= 70°C)

C

(Note 1)

1.7 A

1.36 A

6.8 A
Gate-Source Voltage ± 20 V
Single Pulsed Avalanche Energy
Avalanche Current
Repetitive Avalanche Energy

Power Dissipation (TC = 25°C)

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

50 mJ

1.7 A

0.2 mJ

6.0 V/ns

2.0 W

- Derate above 25°C 0.016 W/°C

T

, T

J

STG

T

L

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 Typ Max Units

R

θJA

* When mounted on the minimum pad size recommended (PCB Mount)

Thermal Resistance, Junction-to-Ambient * -- 62.5 °C/W

Rev. A, May 2001©2001 Fairchild Semiconductor Corporation

FQT7N10L

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

= 100 V, VGS = 0 V

DS

V

= 80 V, TC = 125°C

DS

V

= 20 V, VDS = 0 V

GS

= -20 V, VDS = 0 V

V

GS

100 -- -- V

-- 0.1 -- 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

V

= 10 V, ID = 0.85 A

GS

= 5 V, ID = 0.85 A

V

GS

V

= 30 V, ID = 0.85 A

DS

(Note 4)

1.0 -- 2.0 V

0.275

--

0.300

0.35

0.38

-- 2.75 -- S

Dynamic Characteristics

C

iss

C

oss

C

rss

Input Capacitance
Output Capacitance -- 55 72 pF
Reverse Transfer Capacitance -- 12 15 pF

= 25 V, VGS = 0 V,

V

DS

f = 1.0 MHz

-- 220 290 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 -- 100 210 ns
Turn-Off Delay Time -- 17 45 ns
Turn-Off Fall Time -- 50 110 ns
Total Gate Charge
Gate-Source Charge -- 1.0 -- nC
Gate-Drain Charge -- 2.6 -- nC

= 50 V, ID = 7.3 A,

V

DD

= 25 Ω

R

G

= 80 V, ID = 7.3 A,

V

DS

V

GS

= 5 V

(Note 4, 5)

(Note 4, 5)

-- 9 30 ns

-- 4.6 6.0 nC

Ω

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 = 26mH, IAS = 1.7A, VDD = 25V, RG = 25 Ω, Starting TJ = 25°C

3. ISD ≤ 7.3A, 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 -- -- 1.7 A
Maximum Pulsed Drain-Source Diode Forward Current -- -- 6.8 A

= 0 V, IS = 1.7 A

Drain-Source Diode Forward Voltage
Reverse Recovery Time
Reverse Recovery Charge -- 140 -- nC

Starting TJ = 25°C

DSS,

V

GS

= 0 V, IS = 7.3 A,

V

GS

/ dt = 100 A/µs

dI

F

-- -- 1.5 V

-- 70 -- ns

(Note 4)

Rev. A, May 2001

Typical Characteristics

FQT7N10L

V

GS

Top : 1 0 .0 V

8.0 V

6.0 V

5.0 V

4.5 V

4.0 V

3.5 V
Botto m : 3.0 V

0

10

, Dra in Curre n t [A ]

D

I

-1

10

-1

10

0

10

"

1. 250#s Pulse Te st

2. TC = 25

VDS, Drain-Source Voltage [V]

1.5

1.2

0.9

],

$

[

0.6

DS(ON)

R

0.3

VGS = 5V

VGS = 10V

Drain-Source On-Resistance

0.0
0 5 10 15 20

ID, Drain Current [A]

Note s :

"

10

Note : T

!

1

10

!

25

, Dra in Curre n t [A ]

D

I

-1

10

0246810

!

-55

"

Note s :

1. V

= 30V

DS

2. 250#s Pulse Tes t

!

150

0

VGS , Ga te -S ource V o ltag e [V ]

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

0

!

= 25

J

10

, Reverse Drain Current [A]

DR

I

-1

10

0.2 0.4 0.6 0.8 1.0 1.2 1.4

!

150

!

25

"

Note s :

= 0V

1. V

GS

2. 250#s Pulse Test

VSD , Source-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 = 50V

VDS = 80V

"

Note : I

600

500

400

300

200

Capacitance [pF]

100

0

-1

10

C

= Cgs + Cgd (Cds = shorted)

iss

= Cds + C

C

oss

gd

C

= C

rss

gd

"

10

1

Notes :

= 0 V

1. V

GS

2. f = 1 MH z

C

iss

C

oss

C

rss

0

10

VDS, Drain-Source Voltage [V]

12

10

8

6

4

, Gate-Source Voltage [V]

2

GS

V

0

012345678

QG, Tota l Gate Charge [n C]

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

= 7.3 A

D

Rev. A, May 2001©2001 Fairchild Semiconductor Corporation