CDIDI DCR257, DCR256, DCR255, DCR254, DCR253 Datasheet
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CURRENT REGULATOR DIODES |
DCR250 |
• CONSTANT CURRENT OVER WIDE VOLTAGE RANGE |
thru |
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HIGH SOURCE IMPEDANCE |
DCR257 |
•METALLURGICALLY BONDED
•DOUBLE PLUG CONSTRUCTION
MAXIMUM RATINGS
Operating Temperature: -65°C to +175°C
Storage Temperature: -65°C to +175°C
DC Power Dissipation: 500 mW @ +50°C @ T L = 3/8”
Power Derating: 4 mW / °C above +50°C
ELECTRICAL CHARACTERISTICS |
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@ 25°C, unless otherwise specified |
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MINIMUM |
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MINIMUM |
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DYNAMIC |
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KNEE |
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MAXIMUM |
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TYPE |
REGULATOR CURRENT |
IMPEDANCE |
IMPEDANCE |
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LIMITING |
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PEAK |
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NUMBER |
l p |
(mA) @ V S = 25V |
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@V |
S |
= 25V |
@V |
K = 6.0 V |
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VOLTAGE |
OPERATING |
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(Note 1) |
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Z S (KΩ ) |
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ZK(KΩ ) |
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@ l L = 0.8 l p (min) |
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VOLTAGE |
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FIGURE 1 |
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NOM |
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MIN |
MAX |
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(Note 2) |
(Note 3) |
V |
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L |
(VOLTS) |
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VOLTS |
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DCR250 |
5.10 |
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4.59 |
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5.61 |
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100 |
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4.0 |
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3.67 |
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80 |
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DCR251 |
5.60 |
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5.04 |
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6.16 |
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90 |
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4.0 |
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4.03 |
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80 |
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DCR252 |
6.20 |
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5.58 |
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6.82 |
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80 |
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3.0 |
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4.46 |
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70 |
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DCR253 |
6.80 |
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6.12 |
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7.48 |
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70 |
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2.0 |
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4.90 |
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70 |
DESIGN |
DATA |
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DCR254 |
7.50 |
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6.75 |
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8.25 |
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50 |
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1.5 |
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5.40 |
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60 |
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DCR255 |
8.20 |
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7.38 |
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9.02 |
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30 |
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1.5 |
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5.90 |
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60 |
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DCR256 |
9.10 |
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8.19 |
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10.01 |
20 |
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1.0 |
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6.55 |
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50 |
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DCR257 |
10.00 |
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9.00 |
11.10 |
10 |
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1.0 |
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7.20 |
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50 |
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CASE: |
Hermetically sealed glass case. |
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DO-7 outline. |
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LEAD MATERIAL: |
Copper clad steel. |
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LEAD FINISH: |
Tin / Lead |
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NOTE 1 |
Pulse measurement @ 1% duty cycle, 10 milliseconds maximum. |
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NOTE 2 |
ZS |
is derived by superimposing |
A 90Hz RMS signal equal to 10% of V |
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S on V S |
THERMAL RESISTANCE: ( |
R |
O |
JEC ): |
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250 ˚C/W maximum at L = .375 inch |
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NOTE 3 |
ZK is derived by superimposing |
A 90Hz RMS signal equal to 10% of V |
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K on V K |
THERMAL IMPEDANCE: ( |
Z |
O |
JX ): 25 |
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˚C/W maximum |
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POLARITY: |
Diode to be operated with |
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the banded (cathode) end negative. |
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MOUNTING POSITION: |
Any |
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22 COREY |
STREET, MELROSE, MASSACHUSETTS |
02176 |
PHONE (781) |
665-1071 |
FAX (781) 665-7379 |
WEBSITE: http://www.cdi-diodes.com |
E-mail: mail@cdi-diodes.com |
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