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PDF ZXLD1362 Data sheet ( Hoja de datos )

Número de pieza ZXLD1362
Descripción 1A LED driver
Fabricantes Zetex Semiconductors 
Logotipo Zetex Semiconductors Logotipo



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ZXLD1362
1A LED driver with internal switch
Description
The ZXLD1362 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 ZXLD1362 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
• Simple low parts count
• Internal 60V NDMOS switch
• Up to 1A output current
• Single pin on/off and brightness control
using DC voltage or PWM
• PWM resolution up to 3000:1
• Soft start capability
• High efficiency (up to 95%)
• Wide input voltage range: 6V to 60V
• 65V transient capability
• Low power shutdown
• Up to 1MHz switching frequency
• Inherent open-circuit LED protection
• Typical 4% output current accuracy
Pin connections
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
Typical application circuit
LX 1
5 VIN
VIN (24V)
Rs
0.1
GND 2
ADJ 3
4 ISENSE
TSOT23-5
Top view
C1 4.7F
D1
L1 68H
100nF
GND
VIN
ADJ
ISENSE
ZXLD1362
GND
LX
Provisional version B - July 2007
© Zetex Semiconductors plc 2007
1
www.zetex.com
Datasheet pdf - http://www.DataSheet4U.net/

1 page




ZXLD1362 pdf
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Block diagram
VIN
ZXLD1362
D1
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
-
+
Provisional version B - July 2007
© Zetex Semiconductors plc 2007
5
www.zetex.com
Datasheet pdf - http://www.DataSheet4U.net/

5 Page





ZXLD1362 arduino
www.DataSheet.co.kr
ZXLD1362
Typical operating conditions
1100
1090
1080
1070
1060
1050
1040
1030
1020
1010
1000
0
10%
8%
6%
4%
2%
0%
0
-2%
-4%
-6%
-8%
-10%
100.0%
90.0%
80.0%
70.0%
60.0%
50.0%
0
ZXLD1362 Output Current
L=100µH
10
1 LED
9 LED
20
2 LED
10 LED
30 40
Supply Voltage (V)
3 LED
11 LED
4 LED
12 LED
5 LED
13 LED
50
6 LED
14 LED
7 LED
15 LED
60
8 LED
16 LED
ZXLD1362 Output Current
L=100µH
10 20 30 40 50 60
1 LED
9 LED
2 LED
10 LED
Supply Voltage (V)
3 LED
11 LED
4 LED
12 LED
5 LED
13 LED
6 LED
14 LED
7 LED
15 LED
8 LED
16 LED
ZXLD1362 Efficiency
L=100µH
10
1 LED
9 LED
20
2 LED
10 LED
30 40
Supply Voltage (V)
3 LED
11 LED
4 LED
12 LED
5 LED
13 LED
50
6 LED
14 LED
7 LED
15 LED
60
8 LED
16 LED
Provisional version B - July 2007
© Zetex Semiconductors plc 2007
11
70
70
70
www.zetex.com
Datasheet pdf - http://www.DataSheet4U.net/

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