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CHENMKO ENTERPRISE CO.,LTD
SURFACE MOUNT
SCHOTTKY BARRIER DIODE VOLTAGE 25 Volts CURRENT 1 Ampere
APPLICATION
* Low power recification for switching power supply
CH491DPT
FEATURE
* Small surface mounting dual element linear type. (SC-59/SOT-346) * Ultra low VF. (Vf=0.40V typ. at 1A) * IF=1.0A guaranteed despite size
1.90.2 (3) 0.1 0.40.05 (1) 1.6 0.2 0.1 (2) 0.95
SC-59/SOT-346
2.90.2 0.95
CONSTRUCTION
* Silicon epitaxial planar
MARKING
* 10T
0.15 0.1 0.06 0.3~0.6 (2) (1) 2.80.2 0.2 1.1 0.1 0.80.1 0~0.1
CIRCUIT
(3)
Dimensions in millimeters
SC-59/SOT-346
MAXIMUM RATINGES ( At TA = 25oC unless otherwise noted ) RATINGS Maximum Recurrent Peak Reverse Voltage Maximum RMS Voltage Maximum DC Blocking Voltage Maximum Average Forward Rectified Current Peak Forward Surge Current at 8.3 mSec single half sine-wave Typical Junction Capacitance between Terminal (Note 1) Maximum Operating Temperature Range Storage Temperature Range SYMBOL VRRM VRMS VDC IO IFSM CJ TJ TSTG CH491DPT 25 18 20 1.0 3.0 30 +125 -40 to +125 UNITS Volts Volts Volts Amps Amps pF
o
C C
o
ELECTRICAL CHARACTERISTICS ( At TA = 25oC unless otherwise noted ) CHARACTERISTICS Maximum Instantaneous Forward Voltage at IF= 1A Maximum Average Reverse Current at VR= 20V NOTES : 1. Measured at 1.0 MHZ and applied reverse voltage of 10 volts. 2. ESD sensitive product handling required. SYMBOL VF IR CH491DPT 0.45 200 UNITS Volts uAmps 2002-5
RATING CHARACTERISTIC CURVES ( CH491DPT )
FIG. 1 - FORWARD CHARACTERISTICS 10 1 REVERSE CURRENT, (mA) FORWARD CURRENT, (A) 1000 100 10
o 75 C o Ta=125 C
FIG. 2 - REVERSE CHARACTERISTICS
100m 10m 1m 0.1m 0
=1 Ta
75
25
o
C
C
o
1 100u 10u 1u 0.1u 0 10 20 30 40 50 60 70
o 25 C
25 o C
-25 o C
o -25 C
0.1
0.2
0.3
0.4
0.5
0.6
FORWARD VOLTAGE, (V)
REVERSE VOLTAGE, (V)
FIG. 3 - TYPICAL JUNCTION CAPACITANCE FORWARD POWER DISSIPATION, (W) 10000 JUNCTION CAPACITANCE , (pF)
f=1MHz
0.7 0.6
FIG. 4 - FORWARD POWER DISSIPATION CHARACTERISTICS
D=0.8 D=0.5 sine D=0.3 D=0.2 D=0.1 D=0.05 DC
1000
0.5 0.4 0.3 0.2 0.1 0 0 0.2
100
10
IF IO Tp T D=Tp/T Tj=Tj Max.
1 0 5 10 15 20 25 30 35 40 REVERSE VOLTAGE, (V)
0.4
0.6
0.8
1.0
1.2
1.4
1.6
AVERAGE FORWARD CURRENT, (A)
FIG. 5 - DERATING CURVE BY AMBIENT AVERAGE FORWARD CURRENT, (A) 1.5
DC D=0.8 sine Tp D=0.5 D=0.3 D=0.2 IF IO T D=Tp/T VR=VRM/2
1.0
0.5 D=0.1
D=0.05
0 0 25 50 75 100 125 AMBIENT TEMPERATURE, (oC)

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