ETC 1N5820/D

1N5820, 1N5821, 1N5822
1N5820 and 1N5822 are Preferred Devices
Axial Lead Rectifiers
. . . employing the Schottky Barrier principle in a large area
metal–to–silicon power diode. State–of–the–art geometry features
chrome barrier metal, epitaxial construction with oxide passivation
and metal overlap contact. Ideally suited for use as rectifiers in
low–voltage, high–frequency inverters, free wheeling diodes, and
polarity protection diodes.
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• Extremely Low VF
• Low Power Loss/High Efficiency
• Low Stored Charge, Majority Carrier Conduction
SCHOTTKY BARRIER
RECTIFIERS
3.0 AMPERES
20, 30, 40 VOLTS
Mechanical Characteristics:
• Case: Epoxy, Molded
• Weight: 1.1 gram (approximately)
• Finish: All External Surfaces Corrosion Resistant and Terminal
Leads are Readily Solderable
• Lead and Mounting Surface Temperature for Soldering Purposes:
220°C Max. for 10 Seconds, 1/16″ from case
• Shipped in plastic bags, 500 per bag
• Available Tape and Reeled, 1500 per reel, by adding a “RL’’ suffix to
the part number
• Polarity: Cathode indicated by Polarity Band
• Marking: 1N5820, 1N5821, 1N5822
AXIAL LEAD
CASE 267–03
STYLE 1
MAXIMUM RATINGS
Please See the Table on the Following Page
MARKING DIAGRAM
1N582x
1N582x = Device Code
x
= 0, 1 or 2
ORDERING INFORMATION
Device
Package
Shipping
1N5820
Axial Lead
500 Units/Bag
1N5820RL
Axial Lead
1500/Tape & Reel
1N5821
Axial Lead
500 Units/Bag
1N5821RL
Axial Lead
1500/Tape & Reel
1N5822
Axial Lead
500 Units/Bag
1N5822RL
Axial Lead
1500/Tape & Reel
Preferred devices are recommended choices for future use
and best overall value.
 Semiconductor Components Industries, LLC, 2000
October, 2000 – Rev. 3
1
Publication Order Number:
1N5820/D
1N5820, 1N5821, 1N5822
MAXIMUM RATINGS
Symbol
1N5820
1N5821
1N5822
Unit
Peak Repetitive Reverse Voltage
Working Peak Reverse Voltage
DC Blocking Voltage
Rating
VRRM
VRWM
VR
20
30
40
V
Non–Repetitive Peak Reverse Voltage
VRSM
24
36
48
V
VR(RMS)
14
21
28
V
RMS Reverse Voltage
Average Rectified Forward Current (Note 1.)
VR(equiv) 0.2 VR(dc), TL = 95°C
(RθJA = 28°C/W, P.C. Board Mounting, see Note 5.)
IO
Ambient Temperature
Rated VR(dc), PF(AV) = 0
RθJA = 28°C/W
TA
Non–Repetitive Peak Surge Current
(Surge applied at rated load conditions, half wave, single phase
60 Hz, TL = 75°C)
Operating and Storage Junction Temperature Range
(Reverse Voltage applied)
Peak Operating Junction Temperature (Forward Current applied)
3.0
90
85
A
80
°C
IFSM
80 (for one cycle)
A
TJ, Tstg
65 to +125
°C
TJ(pk)
150
°C
*THERMAL CHARACTERISTICS (Note 5.)
Characteristic
Thermal Resistance, Junction to Ambient
Symbol
Max
Unit
RθJA
28
°C/W
Unit
*ELECTRICAL CHARACTERISTICS (TL = 25°C unless otherwise noted) (Note 1.)
Characteristic
Symbol
Maximum Instantaneous Forward Voltage (Note 2.)
(iF = 1.0 Amp)
(iF = 3.0 Amp)
(iF = 9.4 Amp)
VF
Maximum Instantaneous Reverse Current
@ Rated dc Voltage (Note 2.)
TL = 25°C
TL = 100°C
iR
1N5820
1N5821
1N5822
0.370
0.475
0.850
0.380
0.500
0.900
0.390
0.525
0.950
V
mA
2.0
20
1. Lead Temperature reference is cathode lead 1/32″ from case.
2. Pulse Test: Pulse Width = 300 µs, Duty Cycle = 2.0%.
*Indicates JEDEC Registered Data for 1N5820–22.
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2
2.0
20
2.0
20
1N5820, 1N5821, 1N5822
NOTE 3. — DETERMINING MAXIMUM RATINGS
use in common rectifier circuits, Table 1. indicates
suggested factors for an equivalent dc voltage to use for
conservative design, that is:
VR(equiv) = V(FM) F
(4)
The factor F is derived by considering the properties of the
various rectifier circuits and the reverse characteristics of
Schottky diodes.
Reverse power dissipation and the possibility of thermal
runaway must be considered when operating this rectifier at
reverse voltages above 0.1 VRWM. Proper derating may be
accomplished by use of equation (1).
TA(max) = TJ(max) RθJAPF(AV) RθJAPR(AV)(1)
where TA(max) = Maximum allowable ambient temperature
TJ(max) = Maximum allowable junction temperature
(125°C or the temperature at which thermal
runaway occurs, whichever is lowest)
PF(AV) = Average forward power dissipation
PR(AV) = Average reverse power dissipation
RθJA = Junction–to–ambient thermal resistance
EXAMPLE: Find TA(max) for 1N5821 operated in a
12–volt dc supply using a bridge circuit with capacitive filter
such that IDC = 2.0 A (IF(AV) = 1.0 A), I(FM)/I(AV) = 10, Input
Voltage = 10 V(rms), RθJA = 40°C/W.
Step 1. Find VR(equiv). Read F = 0.65 from Table 1. ,
Figures 1, 2, and 3 permit easier use of equation (1) by
taking reverse power dissipation and thermal runaway into
consideration. The figures solve for a reference temperature
as determined by equation (2).
TR = TJ(max) RθJAPR(AV)
VR(equiv) = (1.41) (10) (0.65) = 9.2 V.
Step 2. Find TR from Figure 2. Read TR = 108°C
@ VR = 9.2 V and RθJA = 40°C/W.
Step 3. Find PF(AV) from Figure 6. **Read PF(AV) = 0.85 W
(2)
Substituting equation (2) into equation (1) yields:
@
TA(max) = TR RθJAPF(AV)
(3)
I (FM)
10 and I F(AV) 1.0 A.
I (AV)
Step 4. Find TA(max) from equation (3).
TA(max) = 108 (0.85) (40) = 74°C.
Inspection of equations (2) and (3) reveals that TR is the
ambient temperature at which thermal runaway occurs or
where TJ = 125°C, when forward power is zero. The
transition from one boundary condition to the other is
evident on the curves of Figures 1, 2, and 3 as a difference
in the rate of change of the slope in the vicinity of 115°C. The
data of Figures 1, 2, and 3 is based upon dc conditions. For
**Values given are for the 1N5821. Power is slightly lower
for the 1N5820 because of its lower forward voltage, and
higher for the 1N5822. Variations will be similar for the
MBR–prefix devices, using PF(AV) from Figure 6.
Table 1. Values for Factor F
Circuit
Half Wave
Full Wave, Bridge
Full Wave,
Center Tapped*†
Load
Resistive
Capacitive*
Resistive
Capacitive
Resistive
Capacitive
Sine Wave
0.5
1.3
0.5
0.65
1.0
1.3
Square Wave
0.75
1.5
0.75
0.75
1.5
1.5
*Note that VR(PK) 2.0 Vin(PK). †Use line to center tap voltage for Vin.
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1N5820, 1N5821, 1N5822
20
125
15
10
115
105
TR , REFERENCE TEMPERATURE (° C)
TR , REFERENCE TEMPERATURE (° C)
125
8.0
RJA (°C/W) = 70
50
95
40
28
85
75
2.0
3.0
4.0
5.0
7.0
15
10
R JL , THERMAL RESISTANCE
JUNCTION-TO-LEAD (° C/W)
TR , REFERENCE TEMPERATURE (° C)
40
28
85
3.0
4.0
5.0
7.0
15
10
30
20
10
8.0
RJA (°C/W) = 70
40
85
7.0
10
30
25
20
15
10
BOTH LEADS TO HEAT SINK,
EQUAL LENGTH
5.0
28
5.0
MAXIMUM
TYPICAL
35
15
75
4.0
r(t), TRANSIENT THERMAL RESISTANCE
(NORMALIZED)
50
95
40
50
15
20
30
0
40
0
1/8
2/8
3/8
4/8
5/8
6/8
7/8
VR, REVERSE VOLTAGE (VOLTS)
L, LEAD LENGTH (INCHES)
Figure 3. Maximum Reference Temperature
1N5822
Figure 4. Steady–State Thermal Resistance
The temperature of the lead should be measured using a ther
mocouple placed on the lead as close as possible to the tie point.
The thermal mass connected to the tie point is normally large
enough so that it will not significantly respond to heat surges
generated in the diode as a result of pulsed operation once
steady-state conditions are achieved. Using the measured val
ue of TL, the junction temperature may be determined by:
TJ = TL + TJL
1.0
LEAD LENGTH = 1/4″
Ppk
tp
Ppk
TIME
t1
DUTY CYCLE = tp/t1
PEAK POWER, Ppk, is peak of an
equivalent square power pulse.
∆TJL = Ppk • RθJL [D + (1 - D) • r(t1 + tp) + r(tp) - r(t1)] where:
∆TJL = the increase in junction temperature above the lead temperature.
r(t) = normalized value of transient thermal resistance at time, t, i.e.:
r(t1 + tp) = normalized value of transient thermal resistance at time
t1 + tp, etc.
0.05
0.03
0.02
0.01
RJA (°C/W) = 70
Figure 2. Maximum Reference Temperature
1N5821
95
0.1
105
Figure 1. Maximum Reference Temperature
1N5820
105
0.2
8.0
VR, REVERSE VOLTAGE (VOLTS)
20
0.3
10
VR, REVERSE VOLTAGE (VOLTS)
115
0.5
15
115
75
20
125
1.0
20
0.2
0.5
1.0
2.0
5.0
10
20
50
t, TIME (ms)
100
200
Figure 5. Thermal Response
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4
500
1.0 k
2.0 k
5.0 k
10 k
20 k
PF(AV) , AVERAGE POWER DISSIPATION (WATTS)
1N5820, 1N5821, 1N5822
10
7.0
5.0
NOTE 4. – APPROXIMATE THERMAL CIRCUIT MODEL
SINE WAVE
I
(FM)
(ResistiveLoad)
I
(AV)
3.0
2.0
1.0
0.7
0.5
Capacitive
Loads
RθS(A)
0.3
0.5 0.7 1.0
2.0
3.0
5.0 7.0 10
IF(AV), AVERAGE FORWARD CURRENT (AMP)
Figure 6. Forward Power Dissipation 1N5820–22
TC(A)
TJ
Mounting Method 1
P.C. Board where available
copper surface is small.
NOTE 5. — MOUNTING DATA
Data shown for thermal resistance junction–to–ambient (RθJA)
for the mountings shown is to be used as typical guideline values
for preliminary engineering, or in case the tie point temperature
cannot be measured.
TYPICAL VALUES FOR RθJA IN STILL AIR
TC(K)
TL(K)
1/8
1/4
1/2
3/4
RθJA
1
50
51
53
55
°C/W
2
58
59
61
63
°C/W
28
É
ÉÉÉÉÉÉÉ
É
ÉÉÉÉÉÉÉ É
É
É
ÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉ
L
L
Mounting Method 3
P.C. Board with
2–1/2″ x 2–1/2″
copper surface.
L = 1/2″
Mounting Method 2
Lead Length, L (in)
Mounting
Method
3
TA(K)
Use of the above model permits junction to lead thermal
resistance for any mounting configuration to be found. For
a given total lead length, lowest values occur when one side
of the rectifier is brought as close as possible to the heat sink.
Terms in the model signify:
TA = Ambient Temperature
TC = Case Temperature
TL = Lead Temperature
TJ = Junction Temperature
RθS = Thermal Resistance, Heat Sink to Ambient
RθL = Thermal Resistance, Lead to Heat Sink
RθJ = Thermal Resistance, Junction to Case
PD = Total Power Dissipation = PF + PR
PF = Forward Power Dissipation
PR = Reverse Power Dissipation
(Subscripts (A) and (K) refer to anode and cathode sides,
respectively.) Values for thermal resistance components
are:
RθL = 42°C/W/in typically and 48°C/W/in maximum
RθJ = 10°C/W typically and 16°C/W maximum
The maximum lead temperature may be found as follows:
TL = TJ(max) TJL
where TJL RθJL · PD
TJ ≈ 125°C
0.2
RθS(K)
SQUARE WAVE
0.2
0.1
RθL(K)
RθJ(K)
PD
TL(A)
5.0
10
20
RθJ(A)
TA(A)
dc
0.3
0.1
RθL(A)
L
L
VECTOR PUSH-IN
TERMINALS T-28
°C/W
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5
BOARD GROUND
PLANE
1N5820, 1N5821, 1N5822
100
IFSM , PEAK HALF-WAVE CURRENT (AMP)
50
30
20
TJ = 100°C
7.0
5.0
25°C
3.0
50
TL = 75°C
f = 60 Hz
30
20
1 CYCLE
SURGE APPLIED AT RATED LOAD CONDITIONS
10
2.0
1.0
2.0
20
5.0 7.0 10
30
50 70 100
Figure 8. Maximum Non–Repetitive Surge
Current
1.0
100
0.7
50
0.5
20
TJ = 125°C
10
0.3
0.2
0.1
0.07
0.05
3.0
NUMBER OF CYCLES
IR , REVERSE CURRENT (mA)
i F, INSTANTANEOUS FORWARD CURRENT (AMP)
10
70
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4
100°C
5.0
2.0
75°C
1.0
0.5
0.2
25°C
0.1
0.05
vF, INSTANTANEOUS FORWARD VOLTAGE (VOLTS)
1N5820
1N5821
1N5822
0.02
Figure 7. Typical Forward Voltage
0.01
4.0
0
8.0
12
16
20
24
28
32
36
40
VR, REVERSE VOLTAGE (VOLTS)
C, CAPACITANCE (pF)
500
Figure 9. Typical Reverse Current
1N5820
300
NOTE 6. — HIGH FREQUENCY OPERATION
200
1N5821
TJ = 25°C
f = 1.0 MHz
Since current flow in a Schottky rectifier is the result of
majority carrier conduction, it is not subject to junction
diode forward and reverse recovery transients due to minority carrier injection and stored charge. Satisfactory circuit
analysis work may be performed by using a model consisting of an ideal diode in parallel with a variable capacitance.
(See Figure 10.)
100
1N5822
70
0.5 0.7 1.0
2.0
3.0
5.0 7.0
10
20
30
VR, REVERSE VOLTAGE (VOLTS)
Figure 10. Typical Capacitance
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6
1N5820, 1N5821, 1N5822
PACKAGE DIMENSIONS
AXIAL LEAD
CASE 267–03
ISSUE G
K
D
A
1
2
B
K
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
DIM
A
B
D
K
INCHES
MIN
MAX
0.370
0.380
0.190
0.210
0.048
0.052
1.000
---
MILLIMETERS
MIN
MAX
9.40
9.65
4.83
5.33
1.22
1.32
25.40
---
STYLE 1:
PIN 1. CATHODE (POLARITY BAND)
2. ANODE
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1N5820, 1N5821, 1N5822
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1N5820/D