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PD -20352F
SCHOTTKY RECTIFIER
HIGH EFFICIENCY SERIES
20CLQ045
20A, 45V
Major Ratings and Characteristics Characteristics IF(AV) Rectangular waveform VRRM (Per Leg) IFSM @ tp = 8.3ms half-sine (Per Leg) VF @ 10Apk, TJ =125C (Per Leg) 20CLQ045 Units 20 45 250 A V A
Description/Features The 20CLQ045 center tap Schottky rectifier has been expressly designed to meet the rigorous requirements of hi-rel environments. It is packaged in the hermetic surface mount SMD-1 ceramic package. The device's forward voltage drop and reverse leakage current are optimized for the lowest power loss and the highest circuit efficiency for typical high frequency switching power supplies and resonent power converters. Full MIL-PRF-19500 quality conformance testing is available on source controlled drawings to TX, TXV and S levels. * * * * * Hermetically Sealed Center Tap Low Forward Voltage Drop High Frequency Operation Guard Ring for Enhanced Ruggedness and Long Term Reliability * Surface Mount * Lightweight
0.48
V
TJ, Tstg Operating and storage -55 to 150
C
CASE STYLE
(ISOLATED BASE)
2
1
3
ANODE COMMON ANODE CATHODE
Case Outline and Dimensions SMD-1
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1
12/03/03
20CLQ045
Voltage Ratings
Part number
VR Max. DC Reverse Voltage (V) (Per Leg) VRWM Max. Working Peak Reverse Voltage (V) (Per Leg)
20CLQ045 45
Absolute Maximum Ratings
Parameters
IF(AV) Max. Average Forward Current See Fig. 5 I FSM Max. Peak One Cycle Non - Repetitive Surge Current (Per Leg) 250 A @ tp = 8.3 ms half-sine
Limits
20
Units
A
Conditions
50% duty cycle @ TC = 100C, rectangular waveform
Electrical Specifications
Parameters
V FM Max. Forward Voltage Drop (Per Leg) See Fig. 1Q
Limits
0.57 0.69 0.48 0.61
Units
V V V V mA mA pF nH @ 10A @ 20A @ 10A @ 20A TJ = 25C TJ = 125C
Conditions
TJ = 25C TJ =1 25C VR = rated VR
I RM CT LS
Max. Reverse Leakage Current (Per Leg) See Fig. 2 Q Max. Junction Capacitance (Per Leg) Typical Series Inductance (Per Leg)
0.5 15 900 5.9
VR = 5VDC ( 1MHz, 25C ) Measured from center of cathode pad to center of anode pad
Thermal-Mechanical Specifications
Parameters
TJ Tstg Max.Junction Temperature Range Max. Storage Temperature Range to Case (Per Leg) RthJC Max. Thermal Resistance, Junction to Case (Per Package) wt Weight (Typical) Die Size Case Style 2.6 125X125 SMD-1 g mils 0.83 C/W DC operation
Limits Units
-55 to 150 -55 to 150 1.67 C C C/W DC operation
Conditions
RthJC Max. Thermal Resistance, Junction
See Fig. 4
Q Pulse Width < 300s, Duty Cycle < 2%
2
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20CLQ045
100
TJ = 175C
10
150C 125C 75C 50C
1
0.1
0.01
0.001
25C
A
0 5 10 15 20 25 30 35 40 45
0.0001
Fig. 2 - Typical Values of Reverse Current Vs. Reverse Voltage (Per Leg)
Fig. 1 - Max. Forward Voltage Drop Characteristics (Per Leg)
Fig. 3 - Typical Junction Capacitance Vs. Reverse Voltage (Per Leg)
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20CLQ045
10
Thermal Response (Z thJC )
1
D = 0.50 0.20 0.10
0.1
0.05 0.02 0.01 SINGLE PULSE (THERMAL RESPONSE)
0.01 0.00001
Notes: 1. Duty factor D = t 1 / t 2 2. Peak TJ = P DM x Z thJC + TC 0.1 1 0.01 10
P DM t1 t2
0.0001
0.001
t1 , Rectangular Pulse Duration (sec)
Fig. 4 - Max. Thermal Impedance ZthJC Characteristics (Per Leg)
20CLQ045
R thJC (DC) = 0.83C/W
Fig. 5 - Max. Allowable Case Temperature Vs. Average Forward Current
IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105 IR LEOMINSTER : 205 Crawford St., Leominster, Massachusetts 01453, USA Tel: (978) 534-5776 TAC Fax: (310) 252-7903 Visit us at www.irf.com for sales contact information. Data and specifications subject to change without notice. 12/03
4
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