ZXLD1366ET5TA Diodes Zetex, ZXLD1366ET5TA Datasheet - Page 25

• Manufacturer Part Number: ZXLD1366ET5TA
• Description: IC LED DRIVR WHITE BCKLGT TSOT-5
• Manufacturer: Diodes Zetex
• Type: Backlight, White LEDr

Specifications of ZXLD1366ET5TA

• 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: 1A
• Internal Switch(s): Yes
• Efficiency: 97%
• Operating Supply Voltage (typ): 9/12/15/18/24V
• Operating Temperature (min): -40C
• Operating Temperature (max): 125C
• Operating Temperature Classification: Automotive
• Package Type: TSOT-23
• Pin Count: 5
• Mounting: Surface Mount
• Power Dissipation: 1.8W
• Operating Supply Voltage (min): 6V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: ZXLD1366E5TA; ZXLD1366E5TR; ZXLD1366E5TR

Application Information
Thermal considerations
When operating the device at high ambient temperatures, or when driving maximum load current, care must be taken to
avoid exceeding the package power dissipation limits. The graph below gives details for power derating. This assumes the
device to be mounted on a 25mm2 PCB with 1oz copper standing in still air.
Note that the device power dissipation will most often be a maximum at minimum supply voltage. It will also increase if the
efficiency of the circuit is low. This may result from the use of unsuitable coils, or excessive parasitic output capacitance on
the switch output.
In order to maximize the thermal capabilities of the DFN3030-6 and the SO-8EP packages thermal vias should be
incorporated into the PCB. See figures 7 and 8 for examples used in the ZXLD1366 evaluation boards.
ZXLD1366
Document number: DS31992 Rev. 6 - 2
2.5
1.5
0.5
2
1
0
-40
Figure 7. Suggested layout for DFN3030-6 package
(Continued)
-25
DFN3030-6
-10
Maximum power dissipation
5
Ambient temperature (°C)
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25 of 30
35
SO-8EP
50
TSOT23-5
65
80
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ZXLD1366
March 2011