ZXLD1356ET5TA Diodes Zetex, ZXLD1356ET5TA Datasheet

ZXLD1356ET5TA
Manufacturer Part Number	ZXLD1356ET5TA
Description	IC LED DRIVR WHITE BCKLGT TSOT-5
Manufacturer	Diodes Zetex
Type	Backlight, White LED
ZXLD1356ET5TA datasheets	1. ZXLD1356ET5TA.pdf (29 pages)

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Warranty: 60 days

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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

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Description

The ZXLD1356 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 550mA. Depending upon supply

voltage and external components, this can provide up to

30 watts of output power.

The ZXLD1356 has been qualified to AECQ100 Grade 1

enabling operation in ambient temperatures from -40 to

125°C

Output current can be adjusted above, or below the set

value, by applying an external control signal to the 'ADJ' pin.

Enhanced output current dimming can be achieved by

applying a PWM signal to the ‘ADJ’ pin.

Features

• Typically better than 0.8% output current accuracy

• Simple and with low part count

• Single pin on/off and brightness control using DC voltage

or PWM

• PWM resolution up to 1000:1

• High efficiency (up to 97%)

• Wide input voltage range: 6V to 60V

• Inherent open-circuit LED protection

• Available in thermally enhanced packages

DFN3030-6

44° C/W

TSOT23-5

82° C/W

• Available in Green molding (no Br, Sb) with lead free

finish/RoHS compliant

• Qualified to AEC-Q100 Grade 1

TSOT23-5

ZXLD1356ET5TA

Applications

• Low voltage halogen replacement LEDs

• Automotive lighting

• Low voltage industrial lighting

• LED back-up lighting

• Illuminated signs

• Emergency lighting

• SELV lighting

• Refrigeration lights

ZXLD1356

Document number: DS33470 Rev. 3 - 2

A Product Line of

Diodes Incorporated

60V 550mA LED DRIVER with AEC-Q100

Pin Assignments

GND

ADJ

TSOT23-5

Top View

(TOP VIEW)

GND

ADJ

DFN3030-6

Typical Application Circuit

(24V)

4.7µF

ADJ

100nF

GND

1 of 29

www.diodes.com

ZXLD1356

SENSE

GND

SENSE

0.36V

SENSE

ZXLD1356

GND

December 2010

Download datasheet (525Kb)

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ZXLD1356ET5TA Summary of contents
Page 1 ... TSOT23-5 82° C • Available in Green molding (no Br, Sb) with lead free finish/RoHS compliant • Qualified to AEC-Q100 Grade 1 TSOT23-5 ZXLD1356ET5TA o Applications • Low voltage halogen replacement LEDs • Automotive lighting • Low voltage industrial lighting • LED back-up lighting • Illuminated signs • Emergency lighting • ... Page 2 Block Diagram 4.7μF Adj 3 1.25V Gnd 2 Figure 1. Block diagram – Pin connections shown for TSOT23-5 package Name TSOT23-5 DFN3030 Drain of NDMOS switch GND Ground (0V) Multi-function On/Off ... Page 3 Absolute Maximum Ratings Symbol Parameter V Input Voltage Voltage SENSE SENSE V LX Output Voltage LX V Adjust Pin Input Voltage ADJ I Switch Output Current LX Power Dissipation P (Refer to Package thermal de-rating curve on ... Page 4 Electrical Characteristics (Test conditions: V Symbol Parameter V Internal regulator start-up threshold SU V Internal regulator shutdown threshold SD I Quiescent supply current with output off INQoff Quiescent supply current with output switching I INQon (Note 3) Mean current sense ... Page 5 Device Description The device, in conjunction with the coil (L1) and current sense resistor (R converter. Device operation (refer to Figure 1 - Block diagram and Figure 2 Operating waveforms voltage SENSE voltage Coil ... Page 6 Device Description (Continued) Switching thresholds With the ratios of R1, R2 and R3 define an average V ADJ REF pin with respect The average output current 200mV/R OUTnom S ... Page 7 Actual operating waveforms [V =15V Normal operation. Output current (Ch3) and LX voltage (Ch2) Actual operating waveforms [V =30V Normal operation. Output current (Ch3) and LX voltage (Ch2) Actual operating waveforms [V =60V Normal ... Page 8 Typical Operating Conditions 0.640 0.620 0.600 0.580 0.560 0.540 0.520 0.500 0 1 LED 10 -2% -4% -6% -8% -10 LED 100% 95% 90% 85% 80% 75% 70% 65% 60% 55% 50% ... Page 9 Typical Operating Conditions 700 600 500 400 300 200 100 LED 100 LED ZXLD1356 Document number: DS33470 Rev (Cont.) ZXLD1356 Switching ... Page 10 Typical Operating Conditions 0.640 0.620 0.600 0.580 0.560 0.540 0.520 0.500 0 1 LED 10 -2% -4% -6% -8% -10 LED 100% 95% 90% 85% 80% 75% 70% 65% 60% 55% 50% ... Page 11 Typical Operating Conditions 700 600 500 400 300 200 100 LED 100 LED ZXLD1356 Document number: DS33470 Rev (Cont.) ZXLD1356 Switching ... Page 12 Typical Operating Conditions 0.640 0.620 0.600 0.580 0.560 0.540 0.520 0.500 0 1 LED 10 -2% -4% -6% -8% -10 LED 100% 95% 90% 85% 80% 75% 70% 65% 60% 55% ... Page 13 Typical Operating Conditions 700 600 500 400 300 200 100 LED 100 LED ZXLD1356 Document number: DS33470 Rev (Cont.) ZXLD1356 ... Page 14 Typical Operating Conditions 0.640 0.620 0.600 0.580 0.560 0.540 0.520 0.500 0 1 LED 10 -2% -4% -6% -8% -10 LED 100% 95% 90% 85% 80% 75% 70% 65% 60% 55% 50% ... Page 15 Typical Operating Conditions 700 600 500 400 300 200 100 LED 100 LED 3 LEDs ZXLD1356 Document number: DS33470 Rev ... Page 16 Typical Operating Conditions 600 500 400 300 200 100 0 0 800 700 600 500 400 300 Output transistor not fully enhanced 200 100 0 0 1.243 1.2425 1.242 1.2415 1.241 1.2405 1.24 1.2395 1.239 1.2385 1.238 ... Page 17 Typical Operating Conditions 2.5 2 1 1.262 1.26 1.258 1.256 1.254 1.252 1.25 1.248 1.246 1.244 -50 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0 -50 ZXLD1356 Document number: DS33470 Rev ... Page 18 Application Information Setting nominal average output current with external resistor R The nominal average output current in the LED(s) is determined by the value of the external current sense resistor (R connected between V and I and is given by: ... Page 19 Application Information (Continued) Output Current Adjustment by PWM Control Directly driving ADJ input A Pulse Width Modulated (PWM) signal with duty cycle D current to a value above or below the nominal average value set by resistor R PWM ... Page 20 Application Information (Continued) Shutdown Mode Taking the ADJ pin to a voltage below 0.2V for more than approximately 100µs will turn off the output and supply current to a low standby level of 65µA nominal. Note that the ADJ pin ... Page 21 Application Information (Continued) V Capacitor Selection IN A low ESR capacitor should be used for input decoupling, as the ESR of this capacitor appears in series with the supply source impedance and lowers overall efficiency. This capacitor has to supply ... Page 22 Application Information (Continued) Inductor Selection Recommended inductor values for the ZXLD1356 are in the range 68 µH to 220 µH. Higher values of inductance are recommended at higher supply voltages in order to minimize errors due to switching delays, which ... Page 23 Application Information (Continued) Diode selection For maximum efficiency and performance, the rectifier (D1) should be a fast low capacitance Schottky diode* with low reverse leakage at the maximum operating voltage and temperature. They also provide better efficiency than silicon diodes, ... Page 24 Application Information (Continued) 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 ... Page 25 Application information (Continued) Layout Considerations LX pin The LX pin of the device is a fast switching node, so PCB tracks should be kept as short as possible. To minimize ground 'bounce', the ground pin of the device should be ... Page 26 Application Information (Continued) Dimming Output Current Using PWM Low frequency PWM mode When the ADJ pin is driven with a low frequency PWM signal (eg 100Hz), with a high level voltage VADJ and a low level of zero, the output ... Page 27 ... Ordering Information Part Package Device mark Code ZXLD1356DACTC 1356 DAC ZXLD1356ET5TA 1356 ET5 Package Outline Dimensions TSOT23-5 ZXLD1356 Document number: DS33470 Rev Reel size Reel width Packaging (inches) (mm) (Note 4) DFN3030 TSOT23 www.diodes.com A Product Line of Diodes Incorporated ZXLD1356 Part Quantity per reel ... Page 28 Package Outline Dimensions DFN3030-6 PIN 1 DOT BY MARKING SIDE VIEW Millimeters Inches DIM Min. Max. Min. A 0.700 0.800 0.0275 A1 0.000 0.050 0.000 A3 0.203 REF 0.008 b 0.300 0.400 0.0118 D 2.950 3.050 0.116 ZXLD1356 Document number: ... Page 29 DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY ...

ZXLD1356ET5TA Summary of contents

Page 1
... TSOT23-5 82° C • Available in Green molding (no Br, Sb) with lead free finish/RoHS compliant • Qualified to AEC-Q100 Grade 1 TSOT23-5 ZXLD1356ET5TA o Applications • Low voltage halogen replacement LEDs • Automotive lighting • Low voltage industrial lighting • LED back-up lighting • Illuminated signs • Emergency lighting • ...
Page 2
Block Diagram 4.7μF Adj 3 1.25V Gnd 2 Figure 1. Block diagram – Pin connections shown for TSOT23-5 package Name TSOT23-5 DFN3030 Drain of NDMOS switch GND Ground (0V) Multi-function On/Off ...
Page 3
Absolute Maximum Ratings Symbol Parameter V Input Voltage Voltage SENSE SENSE V LX Output Voltage LX V Adjust Pin Input Voltage ADJ I Switch Output Current LX Power Dissipation P (Refer to Package thermal de-rating curve on ...
Page 4
Electrical Characteristics (Test conditions: V Symbol Parameter V Internal regulator start-up threshold SU V Internal regulator shutdown threshold SD I Quiescent supply current with output off INQoff Quiescent supply current with output switching I INQon (Note 3) Mean current sense ...
Page 5
Device Description The device, in conjunction with the coil (L1) and current sense resistor (R converter. Device operation (refer to Figure 1 - Block diagram and Figure 2 Operating waveforms voltage SENSE voltage Coil ...
Page 6
Device Description (Continued) Switching thresholds With the ratios of R1, R2 and R3 define an average V ADJ REF pin with respect The average output current 200mV/R OUTnom S ...
Page 7
Actual operating waveforms [V =15V Normal operation. Output current (Ch3) and LX voltage (Ch2) Actual operating waveforms [V =30V Normal operation. Output current (Ch3) and LX voltage (Ch2) Actual operating waveforms [V =60V Normal ...
Page 8
Typical Operating Conditions 0.640 0.620 0.600 0.580 0.560 0.540 0.520 0.500 0 1 LED 10 -2% -4% -6% -8% -10 LED 100% 95% 90% 85% 80% 75% 70% 65% 60% 55% 50% ...
Page 9
Typical Operating Conditions 700 600 500 400 300 200 100 LED 100 LED ZXLD1356 Document number: DS33470 Rev (Cont.) ZXLD1356 Switching ...
Page 10
Typical Operating Conditions 0.640 0.620 0.600 0.580 0.560 0.540 0.520 0.500 0 1 LED 10 -2% -4% -6% -8% -10 LED 100% 95% 90% 85% 80% 75% 70% 65% 60% 55% 50% ...
Page 11
Typical Operating Conditions 700 600 500 400 300 200 100 LED 100 LED ZXLD1356 Document number: DS33470 Rev (Cont.) ZXLD1356 Switching ...
Page 12
Typical Operating Conditions 0.640 0.620 0.600 0.580 0.560 0.540 0.520 0.500 0 1 LED 10 -2% -4% -6% -8% -10 LED 100% 95% 90% 85% 80% 75% 70% 65% 60% 55% ...
Page 13
Typical Operating Conditions 700 600 500 400 300 200 100 LED 100 LED ZXLD1356 Document number: DS33470 Rev (Cont.) ZXLD1356 ...
Page 14
Typical Operating Conditions 0.640 0.620 0.600 0.580 0.560 0.540 0.520 0.500 0 1 LED 10 -2% -4% -6% -8% -10 LED 100% 95% 90% 85% 80% 75% 70% 65% 60% 55% 50% ...
Page 15
Typical Operating Conditions 700 600 500 400 300 200 100 LED 100 LED 3 LEDs ZXLD1356 Document number: DS33470 Rev ...
Page 16
Typical Operating Conditions 600 500 400 300 200 100 0 0 800 700 600 500 400 300 Output transistor not fully enhanced 200 100 0 0 1.243 1.2425 1.242 1.2415 1.241 1.2405 1.24 1.2395 1.239 1.2385 1.238 ...
Page 17
Typical Operating Conditions 2.5 2 1 1.262 1.26 1.258 1.256 1.254 1.252 1.25 1.248 1.246 1.244 -50 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0 -50 ZXLD1356 Document number: DS33470 Rev ...
Page 18
Application Information Setting nominal average output current with external resistor R The nominal average output current in the LED(s) is determined by the value of the external current sense resistor (R connected between V and I and is given by: ...
Page 19
Application Information (Continued) Output Current Adjustment by PWM Control Directly driving ADJ input A Pulse Width Modulated (PWM) signal with duty cycle D current to a value above or below the nominal average value set by resistor R PWM ...
Page 20
Application Information (Continued) Shutdown Mode Taking the ADJ pin to a voltage below 0.2V for more than approximately 100µs will turn off the output and supply current to a low standby level of 65µA nominal. Note that the ADJ pin ...
Page 21
Application Information (Continued) V Capacitor Selection IN A low ESR capacitor should be used for input decoupling, as the ESR of this capacitor appears in series with the supply source impedance and lowers overall efficiency. This capacitor has to supply ...
Page 22
Application Information (Continued) Inductor Selection Recommended inductor values for the ZXLD1356 are in the range 68 µH to 220 µH. Higher values of inductance are recommended at higher supply voltages in order to minimize errors due to switching delays, which ...
Page 23
Application Information (Continued) Diode selection For maximum efficiency and performance, the rectifier (D1) should be a fast low capacitance Schottky diode* with low reverse leakage at the maximum operating voltage and temperature. They also provide better efficiency than silicon diodes, ...
Page 24
Application Information (Continued) 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 ...
Page 25
Application information (Continued) Layout Considerations LX pin The LX pin of the device is a fast switching node, so PCB tracks should be kept as short as possible. To minimize ground 'bounce', the ground pin of the device should be ...
Page 26
Application Information (Continued) Dimming Output Current Using PWM Low frequency PWM mode When the ADJ pin is driven with a low frequency PWM signal (eg 100Hz), with a high level voltage VADJ and a low level of zero, the output ...
Page 27
... Ordering Information Part Package Device mark Code ZXLD1356DACTC 1356 DAC ZXLD1356ET5TA 1356 ET5 Package Outline Dimensions TSOT23-5 ZXLD1356 Document number: DS33470 Rev Reel size Reel width Packaging (inches) (mm) (Note 4) DFN3030 TSOT23 www.diodes.com A Product Line of Diodes Incorporated ZXLD1356 Part Quantity per reel ...
Page 28
Package Outline Dimensions DFN3030-6 PIN 1 DOT BY MARKING SIDE VIEW Millimeters Inches DIM Min. Max. Min. A 0.700 0.800 0.0275 A1 0.000 0.050 0.000 A3 0.203 REF 0.008 b 0.300 0.400 0.0118 D 2.950 3.050 0.116 ZXLD1356 Document number: ...
Page 29
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY ...

ZXLD1356ET5TA

ZXLD1356ET5TA

Shipping terms

Payment terms

Specifications of ZXLD1356ET5TA

Related parts for ZXLD1356ET5TA

ZXLD1356ET5TA Summary of contents

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