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SEMICONDUCTOR
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KCR405T
Constant-Current LED Driver Transistor
TECHNICAL DATA
LED Drive Application. FEATURES
Supplies stable bias current even at low battery voltage. Ideal for stabilizing bias current of LEDs. Negative temperature coefficient protects LEDs against thermal overload.
G A F 1 6 K
E B K
2
5 4 D
DIM A B C D E
F G H I
3
MILLIMETERS _ 0.2 2.9 + 1.6+0.2/-0.1 _ 0.05 0.70 + _ 0.1 0.4 + 2.8+0.2/-0.3 _ 0.2 1.9 +
0.95 _ 0.05 0.16 + 0.00-0.10 0.25+0.25/-0.15 0.60 0.55
G
EQUIVALENT CIRCUIT
6 5 4
MARKING
C L
J K L J J H I
6
5
4
Lot No. Type Name
A B
1 2 3
1. GND 2. Output Current 3. Output Current 4. Source Voltage 5. Output Current 6. Rext
1
2
3
TS6
MAXIMUM RATING (Ta=25
)
SYMBOL VS IO VO VR PD* Tj Tstg 0.8§® ) RATING 40 65 38 0.5 900 150 -55 150 UNIT V mA V V mW
CHARACTERISTIC Source Voltage Output Current Output Voltage Reverse Voltage Between All Terminals Power Dissipation Junction Temperature Storage Temperature Range *Package mounted on a ceramic board (600§±¡¿
2009. 7. 7
Revision No : 0
1/3
KCR405T
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ELECTRICAL CHARACTERISTICS (Ta=25 )
CHARACTERISTIC Collector-Emitter Breakdown Voltage Supply Current DC Current Gain Internal Resistor Output Current Voltage Drop (VS-VE) Lowest Sufficient Battery Voltage Overhead Output Current Change Versus Ta Output Current Change Versus VS SYMBOL BVCEO IS hFE Rint IO VDrop VSmin IO/IO IO/IO TEST CONDITION IC=1mA, IB=0 VS=10V IC=50mA, VCE=1V IRint=50mA VS=10V IO=50mA IO>18mA VS=10V VS=10V MIN. 40 340 100 13 45 0.75 TYP. 420 220 17 50 0.8 1.4 -0.15 1 MAX. 500 470 22 55 0.85 mA V V %/K %/V UNIT V
APPLICATION CIRCUIT
+VS
4
Rext
6
1
2, 3, 5
LED
LED
2009. 7. 7
Revision No : 0
2/3
KCR405T
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IO - VS
100 2.0
56 Ohm
IS - VS
1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 50 0 0 5 10 15 20 25 30 35 40 45 50
80 C 20 C -40 C
Output Current IO (mA)
82 Ohm open
10
VS-VO=1.4V
0
5
10
15
20
25
30
35
40
45
Source Voltage VS (V)
Supply Current IS (mA)
Source Voltage VS (V)
IO - VS
100 100
IO - V S
Output Current IO (mA)
Output Current IO (mA)
VS-VO=1.2V,2V VS-VO=1V
-40 C 20 C 80 C
10
Ta=25 C
0
5
10
15
20
25
30
35
40
45
50
10
VS-VO=1.4V
0
5
10
15
20
25
30
35
40
45
50
Source Voltage VS (V)
Source Voltage VS (V)
IO - Rext
100
80 C 20 C -40 C
Output Current IO (mA)
10 10
VS=10V VS-VO=1.4V
100
External Resistor Rext (Ω)
2009. 7. 7
Revision No : 0
3/3
.