International Rrectifier 47CTQ020, 47CTQ020S, 47CTQ020-1 User Manual

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PD-20540 rev. E 10/99

47CTQ020
47CTQ020S
47CTQ020-1

SCHOTTKY RECTIFIER

Major Ratings and Characteristics

Characteristics Values Units

I

Rectangular 40 A

F(AV)

waveform

V

RRM

@ tp = 5 µs sine 1000 A

I

FSM

V

@ 20 Apk, TJ= 125 °C 0.34 V

F

T

J

20 V

- 55 to 150 °C

40 Amp

Description/Features

This center tap Schottky rectifier has been optimized for ultra
low forward voltage drop specifically for 3.3V output power
supplies. The proprietary barrier technology allows for reliable
operation up to 150 °C junction temperature. Typical
applications are in parallel switching power supplies,
converters, reverse battery protection, and redundant power
subsystems.

150 °C T

Center tap configuration

Optimized for 3.3V application

Ultra low forward voltage drop

High frequency operation

Guard ring for enhanced ruggedness and long term
reliability

High purity, high temperature epoxy encapsulation for
enhanced mechanical strength and moisture resistance

operation

J

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Case Styles

47CTQ020 47CTQ020S 47CTQ020-1

2

TO-220 D

PAK TO-262

1

47CTQ020, 47CTQ020S, 47CTQ020-1

PD-20540 rev. E 10/99

Voltage Ratings

Part number 47CTQ020, ..020S, ..020-1

VRMax. DC Reverse Voltage (V) @ 125° C

Max. DC Reverse Voltage (V) @ 150° C

V

R

20

10

Absolute Maximum Ratings

Parameters 47CTQ Units Conditions

I

Max. Average Forward (Per Device) 40 A 50% duty cycle @ TC = 135°C, rectangular wave form

F(AV)

Current (Per Leg) 20

Max. Peak One Cycle Non-Repetitive 1000 5µs Sine or 3µs Rect. pulse

I

FSM

A

Surge Current (Per Leg) 250 10ms Sine or 6ms Rect. pulse

EASNon-Repetitive Avalanche Energy 18 mJ T

= 25 °C, I

J

=3 Amps, L =3 mH

AS

(Per Leg)

I

Repetitive Avalanche Current 3 A Current decaying linearly to zero in 1 µsec

AR

(Per Leg) Frequency limited by T

J

Following any rated
load condition and with

rated Vrrm

max. VA = 1.5 x VR typical

Electrical Specifications

Parameters 47CTQ Units Conditions

VFMMax. Forward Voltage Drop 0.45 V @ 20A

(Per Leg) (1) 0.51 V @ 40A

0.34 V @ 20A

0.44 V @ 40A

0.31 V @ 20A

0.42 V @ 40A

Max. Reverse Leakage Current 3 mA TJ = 25 °C

I

RM

(Per Leg) (1) 310 mA T

60 mA T

45 mA T

= 125 °C

J

= 125 °C VR = 5V

J

= 125 °C VR = 3.3V

J

306 mA TJ = 150 °C VR = 10V

Threshold Voltage 0.188 V TJ = TJ max.

V

F(TO)

r

Forward Slope Resistance 5.9 mΩ

t

Max. Junction Capacitance (Per Leg) 3000 pF VR = 5VDC, (test signal range 100Khz to 1Mhz) 25°C

C

T

L

Typical Series Inductance (Per Leg) 5.5 nH Measured lead to lead 5mm from package body

S

dv/dt Max. Voltage Rate of Change 10,000 V/ µs

(Rated V

)

R

Thermal-Mechanical Specifications

Parameters 47CTQ Units Conditions

TJMax. Junction Temperature Range -55 to 150 °C

T

Max. Storage Temperature Range -55 to 150 °C

stg

R

Max. Thermal Resistance Junction 1.5 °C/W DC operation

thJC

to Case (Per Leg)

Max. Thermal Resistance Junction 0.75 °C/W DC operation

R

thJC

to Case (Per Package)

Typical Thermal Resistance, Case 0.50 °C/W Mounting surface , smooth and greased

R

thCS

to Heatsink (only for TO-220)

wt Approximate Weight 2 (0.07) g (oz.)

T Mounting Torque Min. 6 (5)

Max. 12 (10)

Kg-cm
(Ibf-in)

TJ = 25 °C

= 125 °C

T

J

TJ = 150 °C

VR = rated V

(1) Pulse Width < 300µs, Duty Cycle <2%

R

applied

2

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47CTQ020, 47CTQ020S, 47CTQ020-1

10000

Jun ction Capacitan ce - C (pF)

10

Thermal Impedanc e Z (°C/W)

1000

Reverse Current - I (mA)

1000

Instantaneous Forward Current - I (A)

PD-20540 rev. E 10/99

T = 150°C

J

100

R

10

125°C

100°C

75°C

1

100

F

0.1

50° C

25° C

0.01
0 4 8 12 16 2 0

T = 150°C

J

T = 125°C

J

T = 25°C

J

10

1

0 0.2 0.4 0.6 0. 8 1 1.2 1.4

Forward Voltage Drop - V (V)

FM

Fig. 1 - Max. Forward Voltage Drop Characteristics

(Per Leg)

T

Reverse Voltage - V (V)

Fig. 2 - Typical Values Of Reverse Current

Vs. Reverse Voltage (Per Leg)

T = 25°C

J

1000

0246810121416182022

Reverse Voltage - V (V)

Fig. 3 - Typical Junction Capacitance

Vs. Reverse Voltage (Per Leg)

R

R

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thJC

0.1

D = 0.50
D = 0.33
D = 0.25
D = 0.20

Single Pulse

(Th e rm a l Re si sta n c e )

P

DM

t

1

t

DM

2

1

thJC

Notes:

1. Duty factor D = t / t

2. Pe ak T = P x Z + T

J

D = 0.75

1

0.01

0.00001 0.0001 0.001 0.01 0.1 1 10 100
t , Rectang ular Pulse Duration (Seco n ds)

1

Fig. 4 - Max. Thermal Impedance Z

Characteristics (Per Leg)

thJC

2

C

3