ZXLD1356ET5TA Diodes Zetex, ZXLD1356ET5TA Datasheet - Page 2

• Manufacturer Part Number: ZXLD1356ET5TA
• Description: IC LED DRIVR WHITE BCKLGT TSOT-5
• Manufacturer: Diodes Zetex
• Type: Backlight, White LEDr

Specifications of ZXLD1356ET5TA

• Topology: PWM, Step-Down (Buck)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Automotive, Backlight
• Type - Secondary: High Brightness LED (HBLED), White LED
• Frequency: 500kHz
• Voltage - Supply: 6 V ~ 60 V
• Voltage - Output: 60V
• Mounting Type: Surface Mount
• Package / Case: TSOT-23-5, TSOT-5, TSOP-5
• Operating Temperature: -40°C ~ 125°C
• Current - Output / Channel: 550mA
• Internal Switch(s): Yes
• Efficiency: 97%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: ZXLD1356ET5TR

Block Diagram
ZXLD1356
Document number: DS33470 Rev. 3 - 2
Name
I
GND
SENSE
ADJ
Pad
V
LX
IN
TSOT23-5
V
1
2
3
4
5
-
IN
DFN3030-6
C1
4.7μF
Figure 1. Block diagram – Pin connections shown for TSOT23-5 package
2, 5
Pad
1
3
4
6
Gnd
Adj
3
2
1.25V
Ground (0V)
Multi-function On/Off and brightness control pin:
Connect resistor R
I
Input voltage (6V to 60V). Decouple to ground with 4.7µF of higher X7R ceramic capacitor
close to device
Exposed pad (EP) - connected to device substrate.
To improve thermal impedance of package the EP must be connected to power ground
but should not be used as the 0V (GND) current path.
It can be left floating but must not be connected to any other voltage other than 0V.
Drain of NDMOS switch
OUTnom
50K
D1
•
•
•
•
R4
Leave floating for normal operation.(V
output current
o I
Drive to voltage below 0.2V to turn off output current
Drive with DC voltage (0.3V<V
of I
Connect a capacitor from this pin to ground to define soft-start time.
Soft-start time is approx.0.2ms/nF
regulator
= 0.2/R
Voltage
20K
OUTnom
OUTnom
R5
S
= 0.2V/R
5V
www.diodes.com
(Note: R
S
1.35V
600KHz
from this to V
+
2 of 29
-
+
-
0.2V
S
)
SMIN
R3
R1
R2
=0.36V with ADJ pin open circuit)
5
V
IN
IN
to define nominal average output current
ADJ
Description
<2.5V) to adjust output current from 24% to 200%
R
S
+
-
+
-
ADJ
Diodes Incorporated
4
= V
A Product Line of
I
SENSE
REF
D1
Low voltage
=1.25V giving nominal average
detector
L1
1
LX
MN
© Diodes Incorporated
ZXLD1356
December 2010