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ZXLD1374 Datasheet(PDF) 6 Page - Diodes Incorporated

Part # ZXLD1374
Description  60V HIGH ACCURACY 1.5A BUCK/BOOST/BUCK-BOOST LED DRIVER CONVERTER
PDF  35 Pages
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Manufacturer  DIODES [Diodes Incorporated]
Direct Link  http://www.diodes.com
Logo DIODES - Diodes Incorporated

ZXLD1374 Datasheet(HTML) 6 Page - Diodes Incorporated

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ZXLD1374
ZXLD1374
Document number: DS35032 Rev. 1 - 2
Page 6 of 35
www.diodes.com
October 2010
© Diodes Incorporated
A Product Line of
Diodes Incorporated
Typical Characteristics
0
0.5
1
1.5
2
2.5
3
6
12
18
24
30
3642
4854
60
Supply Voltage (V)
Figure 1. Supply Current vs. Supply Voltage
0
250
500
750
1000
1250
1500
0
0.5
1
1.5
2
2.5
0
150
300
450
600
750
900
ADJ Voltage (V)
Figure 2. Buck LED Current, Switching Frequency vs. VADJ
ILED
Switching
Frequency
T = 25C
V
= V
= 12V
2LEDs
L = 33 H
R = 300m
A
AUX
IN
S
µ
Ω
0
50
100
150
200
250
300
350
400
450
500
550
600
650
700
0
0.5
1
1.5
2
2.5
0
200
400
600
800
1000
1200
1400
ADJ Voltage
Figure 3. Buck-Boost LED C urrent, Switching Frequency vs. VADJ
Switching
Frequenc y
I
LED
T = 25 C
V
= V
= 24V
8LEDs
L = 33 H
GI = 0. 23
R = 300m
A
AUX
IN
S
°
µ
Ω
0
50
100
150
200
250
300
350
400
450
500
550
600
650
700
0
0.25 0.5 0.75 1
1.25 1.5 1.75
2
2.25 2.5
0
100
200
300
400
500
600
700
ADJ Voltage
Figure 4. Boost LED Current, Sw itching Frequency vs. V
ADJ
Switching
Frequency
ILED
T = 25C
V
= V
= 12V
12 LEDs
L = 33 H
R = 300m
A
AUX
IN
S
µ
Ω
V
= 24V
I
= 100Hz
IN
PWM
T = 25 C
A
°
0
250
500
750
1000
1250
1500
0
10
2030
40
50
60
70
8090 100
PWM Duty Cycle (%)
Figure 5. I
vs. PWM Duty C ycle
LED
ILED
Figure 6. ILED vs time - PWM pin transient response



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