DIOTECH LL4448

LL4148 / LL4448
SMALL SIGNAL SWITCHING DIODE
FEATURES
MINI MELF (LL-34)
Silicon epitaxial planar diode
● Fast switching diodes
● 500mw power dissipation
● High temperature soldering guaranteed
250℃/10S at terminals
●
0.063(1.6)
0.055(1.4) DIA.
MECHANICAL DATA
Case: MINI MELF glass sealed envelope.
Terminals: Plated axial leads, solderable per MIL-STD-750,
Method 2026
Polarity: Color band denotes cathode end
Mounting Position: Any
Weight:0.002 ounce, 0.05 grams
Maximum Ratings (
0.020(0.5)
0.012(0.3)
0.020(0.5)
0.012(0.3)
0.146(3.7)
0.130(3.3)
Dimensions in inches and (millimeters)
TA=25 C Unless otherwise noted)
Symbol
Characteristic
LL4148 / LL4448
Unit
Non-Repetitive Peak Voltage
VRM
100
V
Peak Repetitive Reverse Voltage
Working Peak Reverse Voltage
DC Blocking Voltage
VPWM
VRWM
VR
75
V
IO
150
mA
IFSM
2.0
A
Pd
500
mW
RθJA
300
K/W
TJ,TSTG
-65 to +175
C
Average Rectified Output Current (1)
Non-Repetitive Peak Forward Surge Current
@t=1.0us
Power Dissipation
Thermal Resistance Junction to Ambient
Operating and Strorage Temperature Range
Electrical Characteristics
( TA=25 C Unless otherwise noted)
Symbol
Min
V(BR)R
100
Forward Voltage
IF=10 mA
LL4148
LL4448
IF=5 mA
IF=100 mA
VF
0.62
1.0
0.72
1.0
Leakage Current
VR =20V
VR =75V
VR =75V, Tj=150 C
IR
-
25
5
50
Junction Capacitance
Cj
-
4
PF
Reverse Recovery Time
IF=10 mA, IR=1mA, VR =6V, RL=100Ω
TRR
-
4
nS
Characteristic
Reverse Breakdown Voltage
IR = 100ua
Note: 1.Valid Provided that device Terminals are Kept at Ambient Temperature.
Max
-
Unit
V
V
µA
LL4148 / LL4448
FIG. 2-REVERSE CURRENT VERSUS CONTINUOUS
REVERSE VOLTAGE (TYPICAL VALUES)
FIG. 1-ADMISSIBLE POWER DISSIPATION
VERSUS AMBIENT TEMPERATURE
800
INSTANTANEOUS REVERSE CURRENT,
MICROAMPERES
P,POWER DISSIPATION,MILLIWATTS
RATINGS AND CHARACTERISTIC CURVES
700
600
500
400
300
200
100
0
0
100
200℃
AMBIENT TEMPERATURE,℃
1
0.1
0.01
TJ=25 C
0.001
0.0001
40
60
80
100
120
PERCENT OF PEAK REVERSE VOLTAGE,%
FIG. 3-FORWARD CHARACTERISTICS
FIG. 4-RELATIVE CAPACTANCE VERSUS
REVERSE VOLTAGE
Ctot(vR)
RELATIVE CAPACTANCE
Ctot(0v)
14
12
10
8
6
4
2
0
0
1
2V
INSTANTANEOUS FORWARD VOLEAGE,
V0LTS
1.2
1.0
0.8
0.6
0.4
0
5
10V
REVERSE VOLTAGE,VOLTS.
FIG. 5-ADMISSIBLE REPETITIVE PEAK FORWARD CURRENT VERSUS PULSE DURATION
IFRM,PEAK FORWARD CURRENT,AMPERES
INSTANTANEOUS FORWARD
CURRENT,MILLIAMPERES
16
100
n=tp/T
V=tp/T T=1/fp
tp
10
IFRM
n=0
0.1
T
0.2
1
0.5
0.1
0.01
0.1
1
tp,PULSE DURATION,ms
10
100
1000ms