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A Product Line of
Diodes Incorporated
ZXLD1362
Pin Description
Name
LX
GND
ADJ
I SENSE
V IN
Pin No.
1
2
3
4
5
Function
Drain of NDMOS switch
Ground (0V)
Multi-function On/Off and brightness control pin:
? Leave floating for normal operation.(V ADJ = V REF = 1.25V giving nominal average output current
I OUTnom = 0.1/RS)
o
? Drive to voltage below 0.2V to turn off output current
? Drive with DC voltage (0.3V < V ADJ < 2.5V) to adjust output current from 25% to 200% of I OUTnom
? Connect a capacitor from this pin to ground to increase soft-start time.
? Soft-start time increases approximately 200μs/nF.
Connect resistor R S from this pin to V IN to define nominal average output current I OUTnom = 0.1/R S
(Note: R SMIN = 0.1 ? with ADJ pin open circuit)
Input voltage (6V to 60V). Decouple to ground with 4.7μF of higher X7R ceramic capacitor close to device.
Block Diagram
V IN
D1
R S
L1
`
5V
5 V IN
R1
4 I SENSE
1 LX
C1
4.7μF
Voltage
regulator
0.2V
Low voltage
detector
ADJ
3
GND
MN
R4
R5
50k
20k
R2
D1
1.25V
R3
1.35V
GND
GND
2
Figure 1. Block Diagram
ZXLD1362
Document number: DS33472 Rev. 5 - 2
2 of 24
www.diodes.com
May 2012
? Diodes Incorporated
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