ZXLD1366ET5TA Diodes Zetex, ZXLD1366ET5TA Datasheet - Page 20

• 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
Soft-start
An external capacitor from the ADJ pin to ground will provide a soft-start delay, by increasing the time taken for the voltage on
this pin to rise to the turn-on threshold and by slowing down the rate of rise of the control voltage at the input of the
comparator. Adding capacitance increases this delay by approximately 0.2ms/nF. The graph below shows the variation of
soft-start time for different values of capacitor.
Actual operating waveforms [V
Soft-start operation. LX voltage (CH2) and Output current (CH3) using a 22nF external capacitor on the ADJ pin.
ZXLD1366
Document number: DS31992 Rev. 6 - 2
(Continued)
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14
12
10
-2
8
6
4
2
0
IN
0
=60V, R
Soft Start Time vs Capacitance from ADJ pin to Ground
20
S
=0.2Ω, L=68μH, 22nF on ADJ]
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40
20 of 30
Capacitance (nf)
60
80
100
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ZXLD1366
March 2011