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STLD20D-DEF Datasheet(PDF) 11 Page - STMicroelectronics

Part # STLD20D-DEF
Description  White LED power supply
Download  31 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STLD20D-DEF Datasheet(HTML) 11 Page - STMicroelectronics

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STLD20D
Typical performance characteristics
11/31
6
Typical performance characteristics
Figure 4.
4 LEDs efficiency measurement
Figure 5.
LED current vs input voltage
Figure 6.
Feedback voltage
Figure 7.
Boost switch resistance (STLD20D-
C8)
Figure 8.
Boost switch resistance (STLD20D-
DEF)
Figure 9.
Efficiency vs input voltage
(ILED=20mA; TA=25°C)
70.0
80.0
90.0
2.5
3.0
3.5
4.0
4.5
LQH32CN100K33
LPO04815-103
CRDH2D14-100
Shielded TDK
VLF3010AT-100MR49
V (V)
IN
Efficiency (%)
I
= 20mA,
LED
n.V
= 16V, DC = 100%
LED
T = 25°C
a
V (V)
IN
I
(mA)
LED
19.00
19.20
19.40
19.60
19.80
20.00
20.20
20.40
20.60
20.80
21.00
2.5
3
3.5
4
4.5
5
T = 25°C
a
290.0
295.0
300.0
305.0
310.0
2.5
3.0
3.5
4.0
4.5
T = 85°C
a
T = 25°C
a
T = -40°C
a
V (V)
IN
V
(mV)
FB
0.2
0.3
0.4
0.5
0.6
0.7
0.8
2.5
3.0
3.5
4.0
4.5
T = 85°C
a
T = 25°C
a
T = -40°C
a
V (V)
IN
RDSon( )
Ω
0.2
0.3
0.4
0.5
0.6
0.7
0.8
2.5
3.0
3.5
4.0
4.5
T = 85°C
a
T = 25°C
a
T = -40°C
a
V (V)
IN
RDSon( )
Ω
78
79
80
81
82
83
84
85
86
87
88
2.5
3
3.5
4
4.5
5
Input voltage (V
)
DC
Efficiency (%)


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