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 31DQ03, 31DQ04
Vishay High Power Products
Schottky Rectifier, 3.3 A
FEATURES
* Low profile, axial leaded outline * High frequency operation * Very low forward voltage drop
Cathode Anode
* High purity, high temperature epoxy encapsulation for enhanced mechanical strength and moisture resistance * Guard ring for enhanced ruggedness and long term reliability * Lead (Pb)-free plating * Designed and qualified for industrial level
C-16
PRODUCT SUMMARY
IF(AV) VR 3.3 A 30/40 V
DESCRIPTION
The 31DQ.. axial leaded Schottky rectifier has been optimized for very low forward voltage drop, with moderate leakage. Typical applications are in switching power supplies, converters, freewheeling diodes, and reverse battery protection
MAJOR RATINGS AND CHARACTERISTICS
SYMBOL IF(AV) VRRM IFSM VF TJ tp = 5 s sine 3 Apk, TJ = 25 C CHARACTERISTICS Rectangular waveform VALUES 3.3 30/40 450 0.57 - 40 to 150 UNITS A V A V C
VOLTAGE RATINGS
PARAMETER Maximum DC reverse voltage Maximum working peak reverse voltage SYMBOL VR VRWM 31DQ03 30 31DQ04 40 UNITS V
ABSOLUTE MAXIMUM RATINGS
PARAMETER Maximum average forward current See fig. 4 Maximum peak one cycle non-repetitive surge current See fig. 6 Non-repetitive avalanche energy Repetitive avalanche current SYMBOL IF(AV) TEST CONDITIONS 50 % duty cycle at TL = 117 C, rectangular waveform 5 s sine or 3 s rect. pulse IFSM 10 ms sine or 6 ms rect. pulse EAS IAR TJ = 25 C, IAS = 1.0 A, L = 12 mH Current decaying linearly to zero in 1 s Frequency limited by TJ maximum VA = 1.5 x VR typical Following any rated load condition and with rated VRRM applied VALUES 3.3 450 90 6.0 1.0 mJ A A UNITS
Document Number: 93319 Revision: 06-Nov-08
For technical questions, contact: diodes-tech@vishay.com
www.vishay.com 1
31DQ03, 31DQ04
Vishay High Power Products Schottky Rectifier, 3.3 A
ELECTRICAL SPECIFICATIONS
PARAMETER SYMBOL 3A Maximum forward voltage drop See fig. 1 VFM (1) 6A 3A 6A Maximum reverse leakage current See fig. 4 Typical junction capacitance Typical series inductance Maximum voltage rate of charge Note (1) Pulse width < 300 s, duty cycle < 2 % IRM (1) CT LS dV/dt TJ = 25 C TJ = 125 C TEST CONDITIONS TJ = 25 C VALUES 0.57 0.71 0.51 0.62 1 20 190 9.0 10 000 mA pF nH V/s V UNITS
TJ = 125 C VR = Rated VR
VR = 5 VDC (test signal range 100 kHz to 1 MHz) 25 C Measured lead to lead 5 mm from package body Rated VR
THERMAL - MECHANICAL SPECIFICATIONS
PARAMETER Maximum junction and storage temperature range Maximum thermal resistance, junction to ambient Typical thermal resistance, junction to lead Approximate weight SYMBOL TJ
(1),
TEST CONDITIONS
VALUES - 40 to 150
UNITS C
TStg DC operation Without cooling fin With fin 20 mm x 20 mm (0.79" x 0.79") 1.0 mm (0.04") thickness
RthJA RthJL
80 C/W 15 1.2 0.042 g oz. 31DQ03 31DQ04
Marking device Note
(1)
Case style C-16
dP tot 1 ------------ < ------------- thermal runaway condition for a diode on its own heatsink dT J R thJA
www.vishay.com 2
For technical questions, contact: diodes-tech@vishay.com
Document Number: 93319 Revision: 06-Nov-08
31DQ03, 31DQ04
Schottky Rectifier, 3.3 A Vishay High Power Products
100
Junction Capacitance - CT (pF)
1000
T = 25C J
100
Instantaneous Forward Current - IF (A)
10
10 0 40 80 120 160 200
Reverse Voltage - VR (V)
Fig. 3 - Typical Junction Capacitance vs. Reverse Voltage
TJ = 150C TJ = 125C
150
Allowable Lead Temperature (C)
DC
1
TJ = 25C
130
110
90 80% Rated Vr applied
see note (1)
Square wave (D = 0.50)
0.1 0 0.3 0.6 0.9 1.2
70 0 1 2 3 4 5
Average Forward Current - IF(AV) (A)
Forward Voltage Drop - VFM (V)
Fig. 1 - Maximum Forward Voltage Drop Characteristics
Fig. 4 - Maximum Allowable Lead Temperature vs. Average Forward Current
2.5
100
T J = 150C
Average Power Loss (Watts)
10
Reverse Current - IR (mA)
2
D = 0.20 D = 0.25 D = 0.33 D = 0.50 D = 0.75 RMS Limit DC
1
125C
1.5
0.1
1
0.01
25C
0.5
0.001 0 10 20 30 40
Reverse Voltage - VR (V)
0 0 1 2 3 4 5
Average Forward Current - IF(AV) (A)
Fig. 2 - Typical Values of Reverse Current vs. Reverse Voltage
Fig. 5 - Forward Power Loss Characteristics
Note (1) Formula used: T = T - (Pd + Pd C J REV) x RthJC; Pd = Forward power loss = IF(AV) x VFM at (IF(AV)/D) (see fig. 6); PdREV = Inverse power loss = VR1 x IR (1 - D); IR at VR1 = 80 % rated VR
Document Number: 93319 Revision: 06-Nov-08
For technical questions, contact: diodes-tech@vishay.com
www.vishay.com 3
31DQ03, 31DQ04
Vishay High Power Products Schottky Rectifier, 3.3 A
1000
Non-Repetitive Surge Current - IFSM (A)
100
At Any Rated Load Condition And With Rated VRRM Applied Following Surge
10 10
100
1000
10000
Square Wave Pulse Duration - tp (microsec)
Fig. 6 - Maximum Non-Repetitive Surge Current
ORDERING INFORMATION TABLE
Device code
31
1 1 2 3 4 5 -
D
2
Q
3
04
4
TR
5
31 = 3.1 A (axial and small packages - current is x 10) D = DO-201 package Q = Schottky Q.. series 04 = Voltage ratings TR = Tape and reel package ( 1200 pcs) None = Box package (500 pcs) 03 = 30 V 04 = 40 V
LINKS TO RELATED DOCUMENTS Dimensions Part marking information Packaging information http://www.vishay.com/doc?95242 http://www.vishay.com/doc?95304 http://www.vishay.com/doc?95309
www.vishay.com 4
For technical questions, contact: diodes-tech@vishay.com
Document Number: 93319 Revision: 06-Nov-08
Legal Disclaimer Notice
Vishay
Disclaimer
All product specifications and data are subject to change without notice. Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, "Vishay"), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein or in any other disclosure relating to any product. Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any information provided herein to the maximum extent permitted by law. The product specifications do not expand or otherwise modify Vishay's terms and conditions of purchase, including but not limited to the warranty expressed therein, which apply to these products. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by any conduct of Vishay. The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications. Product names and markings noted herein may be trademarks of their respective owners.
Document Number: 91000 Revision: 18-Jul-08
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