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PDF ZXLD1366 Data sheet ( Hoja de datos )
| Número de pieza | ZXLD1366 | |
| Descripción | 60V LED driver | |
| Fabricantes | Zetex Semiconductors | |
| Logotipo |  |
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A Product Line of
Diodes Incorporated
ZXLD1366
High accuracy 1A, 60V LED driver with internal switch
Description
The ZXLD1366 is a continuous mode
inductive step-down converter, designed for
driving single or multiple series connected
LEDs efficiently from a voltage source higher
than the LED voltage. The device operates
from an input supply between 6V and 60V and
provides an externally adjustable output
current of up to 1A. Depending upon supply
voltage and external components, this can
provide up to 48 watts of output power.
The ZXLD1366 includes the output switch and
a high-side output current sensing circuit,
which uses an external resistor to set the
nominal average output current.
Output current can be adjusted above, or
below the set value, by applying an external
control signal to the 'ADJ' pin.
Features
• Typically better than 0.8% output current
accuracy
• Available in thermally enhanced DFN
package
• Simple and with low part count
• Single pin on/off and brightness control
using DC voltage or PWM
• PWM resolution up to 1000:1
• High efficiency (up to 97%)
• Wide input voltage range: 6V to 60V
• Inherent open-circuit LED protection
Pin connections
LX 1
5 VIN
LX
GND 2
GND
ADJ 3
4 ISENSE ADJ
TSOT23-5
Top view
DFN633
Top view
VIN
GND
ISENSE
The ADJ pin will accept either a DC voltage or a
PWM waveform. Depending upon the control
frequency, this will provide either a continuous
(dimmed) or a gated output current. Soft-start
can be forced using an external capacitor from
the ADJ pin to ground.
Applying a voltage of 0.2V or lower to the ADJ
pin turns the output off and switches the device
into a low current standby state.
Applications
• Low voltage halogen replacement LEDs
• Automotive lighting
• Low voltage industrial lighting
• LED back-up lighting
• Illuminated signs
• Emergency lighting
• SELV lighting
• LCD TV backlighting
• Refrigeration lights
Typical application circuit
D1
VIN (24V)
Rs
0.2⍀
C1 4.7F
100nF
GND
VIN
ADJ
L1
ISENSE
ZXLD1366
GND
LX
Issue 2 - September 2008
© Diodes Incorporated 2008
1
www.zetex.com
www.diodes.com
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
www.DataSheet.co.kr
ZXLD1366
D1
VIN
RS L1
5 VIN
4 ISENSE
1 LX
C1
4.7F
5V R1
Voltage
regulator
0.2V
-
+
Adj
3
R4 R5
50K 20K
600KHz
R2
D1
1.25V
Gnd
2
-
+
1.35V
R3
-
+ Low voltage
detector
MN
-
+
Figure 1 Block diagram - Pin connection for TSOT package
Issue 2 - September 2008
© Diodes Incorporated 2008
5
www.zetex.com
www.diodes.com
Datasheet pdf - http://www.DataSheet4U.net/
5 Page 
www.DataSheet.co.kr
Typical operating conditions
500
450
400
350
300
250
200
150
100
50
0
0
01 LEDs
03 LEDs
05 LEDs
07 LEDs
09 LEDs
11 LEDs
13 LEDs
15 LEDs
10
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
0
01 LEDs
03 LEDs
05 LEDs
07 LEDs
09 LEDs
11 LEDs
13 LEDs
15 LEDs
10
ZXLD1366 Switching Frequency
L=68μH
20 30 40
Supply Voltage (V)
ZXLD1366 Duty Cycle
L=68μH
50
20 30 40
Supply Voltage (V)
50
ZXLD1366
60
60
Issue 2 - September 2008
© Diodes Incorporated 2008
11
www.zetex.com
www.diodes.com
Datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet ZXLD1366.PDF ] | |
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