ZXLD1356ET5TA Diodes Inc, ZXLD1356ET5TA Datasheet

LED Drivers 550mA, 60V LED Drver, Int Swtch

ZXLD1356ET5TA

Manufacturer Part Number
ZXLD1356ET5TA
Description
LED Drivers 550mA, 60V LED Drver, Int Swtch
Manufacturer
Diodes Inc
Datasheet

Specifications of ZXLD1356ET5TA

Operating Supply Voltage
6 V to 60 V
Maximum Supply Current
550 mA
Maximum Power Dissipation
1 W
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
Package / Case
TSOT-23-5
Minimum Operating Temperature
- 40 C
Led Driver Application
Automotive Lighting, Illuminated Signs
Topology
Buck
No. Of Outputs
1
Output Current
550mA
Output Voltage
60V
Input Voltage
6V To 60V
Dimming Control Type
PWM / DC
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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ZXLD1356ET5TA
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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
• 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
• Available in Green molding (no Br, Sb) with lead free
• Qualified to AEC-Q100 Grade 1
• Low voltage halogen replacement LEDs
• Automotive lighting
• Low voltage industrial lighting
• LED back-up lighting
• Illuminated signs
• Emergency lighting
• SELV lighting
• Refrigeration lights
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.
Applications
ZXLD1356
Document number: DS33470 Rev. 3 - 2
or PWM
o
o
finish/RoHS compliant
o
DFN3030-6
TSOT23-5
TSOT23-5
ZXLD1356ET5TA
θ
θ
JA
JA
44° C/W
82° C/W
www.diodes.com
1 of 29
Pin Assignments
Typical Application Circuit
 
V
IN
(24V)
GND
C1
100nF
GND
ADJ
4.7µF
60V 550mA LED DRIVER with AEC-Q100
LX
GND
Diodes Incorporated
ADJ
LX
A Product Line of
1
2
3
ADJ
(TOP VIEW)
V
TSOT23-5
DFN3030-6
IN
Top View
D1
0.36V
Rs
ZXLD1356
I
6
5
4
SENSE
GND
I
V
GND
SENSE
IN
V
I
SENSE
IN
© Diodes Incorporated
L1
ZXLD1356
December 2010
LX

Related parts for ZXLD1356ET5TA

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

... 0.2/R (Note: R =0.36V with ADJ pin open circuit) OUTnom S SMIN www.diodes.com A Product Line of Diodes Incorporated ZXLD1356 SENSE Low voltage detector =1.25V giving nominal average ADJ REF <2.5V) to adjust output current from 24% to 200% December 2010 © Diodes Incorporated ...

Page 3

... V (65V for 0.5 sec) +0 -0.3 to +60 V (65V for 0.5 sec 1.8 -55 to 150 °C 150 °C Rating Unit DFN3030 °C °C °C/W Min Max Units 800 ns 800 ns 625 kHz 0.01 0.99 -40 125 °C December 2010 © Diodes Incorporated ...

Page 4

... V . threshold and output current REF SENSE externally driven to 2.5V, ratio 10.1. REF December 2010 © Diodes Incorporated Unit V V µ µA V ppm/° kΩ A Ω µA ms kHz kHz ...

Page 5

... The supply referred voltage V SENSE www.diodes.com A Product Line of Diodes Incorporated ZXLD1356 200mV V SENSE- V SENSE+ I +15% OUTnom I OUTnom I -15% OUTnom 0.15V ADJ is forced across internal resistor SENSE ), the comparator output ADJ . ADJ . The current decays at a rate determined IN December 2010 © Diodes Incorporated ) ADJ ...

Page 6

... Quiescent supply current during shutdown is nominally 60µA and switch leakage is below 5µA. ZXLD1356 Document number: DS33470 Rev Product Line of Diodes Incorporated switching threshold of 200mV (measured on the I SENSE is then defined by this voltage and R OUTnom www.diodes.com ZXLD1356 SENSE according to: S December 2010 © Diodes Incorporated ...

Page 7

... Normal operation. Output current (Ch3) and LX voltage (Ch2) Actual operating waveforms [V =60V Normal operation. Output current (Ch3) and LX voltage (Ch2) ZXLD1356 Document number: DS33470 Rev Diodes Incorporated =0.36V, L=68µH] S =0.36V, L=68µH] S =0.36V, L=68µ www.diodes.com A Product Line of ZXLD1356 December 2010 © Diodes Incorporated ...

Page 8

... ZXLD1356 Output Current Deviation (Normalized 68µ Supply Voltage (V) 3 LEDs 5 LEDs 7 LEDs 9 LEDs ZXLD1356 Efficiency L = 68µ Supply Voltage (V) 3 LEDs 5 LEDs 7 LEDs 9 LEDs www.diodes.com A Product Line of Diodes Incorporated ZXLD1356 LEDs 13 LEDs 15 LEDs LEDs 13 LEDs 15 LEDs LEDs 13 LEDs 15 LEDs December 2010 © Diodes Incorporated ...

Page 9

... ZXLD1356 Switching Frequency L = 68µ Supply Voltage (V) 3 LEDs 5 LEDs 7 LEDs 9 LEDs ZXLD1356 Duty Cycle L = 68µ Supply Voltage (V) 3 LEDs 5 LEDs 7 LEDs 9 LEDs www.diodes.com A Product Line of Diodes Incorporated ZXLD1356 LEDs 13 LEDs 15 LEDs LEDs 13 LEDs 15 LEDs December 2010 © Diodes Incorporated ...

Page 10

... Supply Voltage (V) 3 LEDs 5 LEDs 7 LEDs 9 LEDs ZXLD1356 Efficiency L = 100µ Supply Voltage (V) 3 LEDs 5 LEDs 7 LEDs 9 LEDs www.diodes.com A Product Line of Diodes Incorporated ZXLD1356 LEDs 13 LED s 15 LED LEDs 13 LED s 15 LED LEDs 13 LEDs 15 LEDs December 2010 © Diodes Incorporated ...

Page 11

... ZXLD1356 Switching Frequency L = 100µ Supply Voltage (V) 3 LEDs 5 LEDs 7 LEDs 9 LEDs ZXLD1356 Duty Cycle L = 100µ Supply Voltage (V) 3 LEDs 5 LEDs 7 LEDs 9 LEDs www.diodes.com A Product Line of Diodes Incorporated ZXLD1356 LEDs 13 LEDs 15 LEDs LEDs 13 LEDs 15 LEDs December 2010 © Diodes Incorporated ...

Page 12

... ZXLD 1356 Output Current Deviation (Normalized 150µ Supply Voltage (V) 3 LEDs 5 LEDs 7 LEDs 9 LEDs ZXLD1356 Efficiency L = 150µ Supply Voltage (V) 3 LEDs 5 LEDs 7 LEDs 9 LEDs www.diodes.com A Product Line of Diodes Incorporated ZXLD1356 LEDs 13 LEDs 15 LEDs LEDs 13 LEDs 15 LEDs LEDs 13 LEDs 15 LEDs December 2010 © Diodes Incorporated ...

Page 13

... ZXLD1356 Switching Frequency L = 150µ Supply Voltage (V) 3 LEDs 5 LEDs 7 LEDs 9 LEDs ZXLD1356 Duty Cycle L = 150µ Supply Voltage (V) 3 LEDs 5 LEDs 7 LEDs 9 LEDs www.diodes.com A Product Line of Diodes Incorporated ZXLD1356 LEDs 13 LED s 15 LED LEDs 13 LEDs 15 LEDs December 2010 © Diodes Incorporated ...

Page 14

... ZXLD1356 Output Current Deviation (N ormalized 220µ Supply Voltage (V) 3 LEDs 5 LEDs 7 LEDs 9 LEDs ZXLD1356 Efficiency L = 220µ Supply Voltage (V) 3 LEDs 5 LEDs 7 LEDs 9 LEDs www.diodes.com A Product Line of Diodes Incorporated ZXLD1356 LEDs 13 LEDs 15 LEDs LEDs 13 LEDs 15 LEDs LEDs 13 LEDs 15 LEDs December 2010 © Diodes Incorporated ...

Page 15

... ZXLD1356 Switching Frequency L = 220µ Supply Voltage (V) 3 LEDs 5 LEDs 7 LEDs 9 LEDs ZXLD1356 Duty Cycle L = 220µ Supply Voltage (V) 5 LEDs 7 LEDs 9 LEDs www.diodes.com A Product Line of Diodes Incorporated ZXLD1356 LEDs 13 LEDs 15 LEDs LEDs 13 LED s 15 LEDs December 2010 © Diodes Incorporated ...

Page 16

... Document number: DS33470 Rev (Cont.) LED Current vs Vadj 1 2 ADJ Pin Voltage (V) R=0.36Ω R=0.56Ω R=1.33Ω Supply current Output transistor fully enhanced Supply voltage (V) Vref Supply voltage (V) Shutdown current Supply voltage ( www.diodes.com A Product Line of Diodes Incorporated ZXLD1356 December 2010 © Diodes Incorporated ...

Page 17

... Lx on-resistance vs supply voltage ltag Vadj vs Temperature 0 50 100 Temperature (C) Lx on-resistance vs die temperature 0 50 100 Die Temperature ( www.diodes.com A Product Line of Diodes Incorporated ZXLD1356 - 125 12V 20V 30V 150 200 7V 9V 12V 20V 30V 150 200 December 2010 © Diodes Incorporated ...

Page 18

... V . When driving the ADJ pin above 1.25V, R ADJ REF and 14.2kΩ ±25% for voltages above V REF www.diodes.com A Product Line of Diodes Incorporated ZXLD1356 ) in the S (=1.25V). Note that R = 0.36V is the REF S must be increased in S +100mV. REF December 2010 © Diodes Incorporated ) S ...

Page 19

... If the NMOS transistor within the microcontroller has high Gate / Drain capacitance, this arrangement can inject a negative spike into ADJ input of the ZXLD1356 and cause erratic operation but the addition of a Schottky clamp diode (eg Diodes Inc. SD103CWS) to ground and inclusion of a series resistor (3.3k) will prevent this. See the section on PWM dimming for more details of the various modes of control using high frequency and low frequency PWM signals ...

Page 20

... Soft-start operation. LX voltage (Ch2) and Output current (Ch3) using a 22nF external capacitor on the ADJ pin. ZXLD1356 Document number: DS33470 Rev Soft Start Time vs Capacitance from ADJ pin to Ground Capacitance (nf) =0.36V, L=68µH, 22nF on ADJ www.diodes.com A Product Line of Diodes Incorporated ZXLD1356 will increase output current above the REF 100 120 December 2010 © Diodes Incorporated ...

Page 21

... V A suitable capacitor would be NACEW100M1006.3x8TR13F (NIC Components). The following web sites are useful when finding alternatives: www.murata.com www.niccomp.com www.kemet.com ZXLD1356 Document number: DS33470 Rev pin as possible www.diodes.com A Product Line of Diodes Incorporated ZXLD1356 voltage: December 2010 © Diodes Incorporated ...

Page 22

... Legend 14 68uH 13 100uH 12 150uH 11 220uH Figure 3. ZXLD1356 Minimum Recommended Inductor ZXLD1356 Document number: DS33470 Rev Diodes Incorporated pins. IN Minimum Recommended Inductor 2% Accuracy, <60°C Case Temperature Supply Voltage ( www.diodes.com A Product Line of ZXLD1356 50 60 December 2010 © Diodes Incorporated ...

Page 23

... If a silicon diode is used, care should be taken to ensure that the total voltage appearing on the LX pin including supply ripple, does not exceed the specified maximum value. *A suitable Schottky diode would be B1100B (Diodes Inc). Reducing Output Ripple Peak to peak ripple current in the LED(s) can be reduced, if required, by shunting a capacitor, Cled, across the LED(s) as shown ...

Page 24

... The output of the sensing network can be used to drive the ADJ pin in order to reduce output current with increasing temperature. ZXLD1356 Document number: DS33470 Rev Maximum Power Dissipation DFN3030 Ambient Temperature (° www.diodes.com A Product Line of Diodes Incorporated ZXLD1356 95 110 125 140 December 2010 © Diodes Incorporated ...

Page 25

... ZXLD1356 evaluation boards are available on request, which have connection terminals that allow customers to connect their own LED products to the board. ZXLD1356 Document number: DS33470 Rev Product Line of Diodes Incorporated directly to one end of R and Isense directly to the opposite end ZXLD1356 GND www.diodes.com ZXLD1356 with S December 2010 © Diodes Incorporated ...

Page 26

... This mode is preferable if optimum LED 'whiteness' is required. It will also provide the widest possible dimming range (approx. 1000:1) and higher efficiency at the expense of greater output ripple. ZXLD1356 Document number: DS33470 Rev Low frequency PWM operating waveforms www.diodes.com A Product Line of Diodes Incorporated ZXLD1356 December 2010 © Diodes Incorporated ...

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

... BSC E 2.950 3.050 0.0157 E2 1.150 1.250 0.0452 0.120 e1 1.900REF L 0.450 0.550 0.0177 www.diodes.com A Product Line of Diodes Incorporated ZXLD1356 PIN #1 IDENTIFICATION CHAMFER 0.300X45° e Inches Min. Max. 0.0807 0.0374 BSC 0.116 0.120 0.0492 0.0748 0.0216 December 2010 © Diodes Incorporated ...

Page 29

... Any Customer or user of this document or products described herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated website, harmless against all damages. ...

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