ZXLD1366EN8TC Diodes Inc, ZXLD1366EN8TC Datasheet

Current & Power Monitors & Regulators LED DRVR W/ INT SW 1A 60V

ZXLD1366EN8TC

Manufacturer Part Number
ZXLD1366EN8TC
Description
Current & Power Monitors & Regulators LED DRVR W/ INT SW 1A 60V
Manufacturer
Diodes Inc
Datasheet

Specifications of ZXLD1366EN8TC

Product
Current Monitors
Operating Temperature Range
- 40 C to + 125 C
Mounting Style
SMD/SMT
Sense Voltage (max)
0.3 V
Supply Voltage (max)
60 V
Supply Voltage (min)
6 V
Package / Case
SO-8-EP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ZXLD1366EN8TC
Manufacturer:
Diptronics
Quantity:
60 000
Part Number:
ZXLD1366EN8TC
Manufacturer:
ZETEX
Quantity:
20 000
Company:
Part Number:
ZXLD1366EN8TC
Quantity:
1 055
ZXLD1366
Document number: DS31992 Rev. 6 - 2
The ZXLD1366 has been qualified to AECQ100 Grade 1
enabling operation in ambient temperatures from -40 to
125°C
Features
Description
The ZXLD1366 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 1A.
The ZXLD1366 uses a high-side output current sensing
circuit which uses an external resistor to set the nominal
average output current. The 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 resolution can be achieved by applying a PWM
signal to the ‘ADJ’ pin.
Soft-start can be forced using an external capacitor from the
ADJ pin to ground. Applying a voltage of 0.2V or lower to
the ADJ pin turns the output off and switches the device into
a low current standby state.
Applications
Typically better than 0.8% output current accuracy
Available in thermally enhanced packages
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 Green molding (no Br, Sb) with lead free
finish/RoHS compliant
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
o
o
o
o
o
SO-8EP
DFN3030-6
TSOT23-5
SO-8EP
TSOT23-5
ZXLD1366ET5TA
ZXLD1366EN8TC
θ
θ
θ
JA
JA
JA
44° C/W
45° C/W
82° C/W
www.diodes.com
HIGH ACCURACY 1A, 60V LED DRIVER WITH AEC-Q100
1 of 30
Pin Assignments
Typical Application Circuit
V
IN
(24V)
GND
C1
GND
ADJ
100nF
Diodes Incorporated
LX
4.7µF
GND
ADJ
A Product Line of
GND
GND
ADJ
LX
LX
1
2
3
(TOP VIEW)
1
2
3
(TOP VIEW)
1
4
2
3
TSOT23-5
DFN3030-6
ADJ
(TOP VIEW)
V
IN
SO-8EP
D1
0.2V
Rs
ZXLD1366
5
4
6
I
SEN SE
GND
8
6
5
7
5
4
I
GND
V
SENSE
GND
GND
I
V
SENSE
V
I
IN
© Diodes Incorporated
IN
SENSE
IN
ZXLD1366
March 2011
L1
LX

Related parts for ZXLD1366EN8TC

ZXLD1366EN8TC Summary of contents

Page 1

... High efficiency (up to 97%) • Wide input voltage range 60V • Inherent open-circuit LED protection • Available in Green molding (no Br, Sb) with lead free finish/RoHS compliant • Qualified to AEC-Q100 Grade 1 SO-8EP ZXLD1366EN8TC o TSOT23-5 ZXLD1366ET5TA o Applications • Low voltage halogen replacement LEDs • Automotive lighting • ...

Page 2

... It can be left floating but must not be connected to any other voltage other than 0V www.diodes.com A Product Line of Diodes Incorporated ZXLD1366 SENSE Low voltage dete ctor Description = V = 1.25V giving ADJ REF = 0.2V/R ) OUTnom S < 2.5V) to adjust output current ADJ to define nominal average output IN March 2011 © Diodes Incorporated ...

Page 3

... Rating Unit SO-8EP DFN3030 °C Min Max Units 6 60 800 800 625 kHz 0.01 0.99 0.3 0.7 -40 125 March 2011 © Diodes Incorporated °C ...

Page 4

... V . Threshold and output current SENSE externally driven to 2.5V, ratio 10:1. REF March 2011 © Diodes Incorporated Ω V ...

Page 5

... SENSE is then defined by this voltage and R OUTnom switching threshold and adjust the output current www.diodes.com A Product Line of Diodes Incorporated ZXLD1366 is forced across internal SENSE ), the ADJ ADJ . The current decays at a rate IN according to: S March 2011 © Diodes Incorporated . ...

Page 6

... Comparator V input voltage ADJ 5V Comparator output 0V Figure 2. Theoretical Operating Waveforms ZXLD1366 Document number: DS31992 Rev Toff Ton 230mV 170mV ADJ www.diodes.com A Product Line of Diodes Incorporated ZXLD1366 200mV V SENSE- V SENSE+ I +15% OUTnom I OUTnom I -15% OUTnom 0.15V ADJ March 2011 © Diodes Incorporated ...

Page 7

... Actual operating waveforms [V IN Normal operation. Output current (Ch3) and LX voltage (Ch2) ZXLD1366 Document number: DS31992 Rev =15V, R =0.2Ω, L=68µH] S =30V, R =0.2Ω, L=68µH] S =60V, R =0.2Ω, L=68µ www.diodes.com A Product Line of Diodes Incorporated ZXLD1366 March 2011 © Diodes Incorporated ...

Page 8

... LEDs 75% 70% 65% 60% 55% 50 ZXLD1366 Document number: DS31992 Rev Product Line of Diodes Incorporated ZXLD1366 Output Current L=68µ Supply Voltage (V) ZXLD1366 Output Current Deviation L=68µ Supply Voltage (V) ZXLD1366 Efficiency L=68µ Supply Voltage ( www.diodes.com ZXLD1366 March 2011 © Diodes Incorporated ...

Page 9

... LEDs 40% 05 LEDs 07 LEDs 30% 09 LEDs 11 LEDs 20% 13 LEDs 15 LEDs 10 ZXLD1366 Document number: DS31992 Rev (cont.) ZXLD1366 Switching Frequency L=68µ Supply Voltage (V) ZXLD1366 Duty Cycle L=68µ Supply Voltage ( www.diodes.com A Product Line of Diodes Incorporated ZXLD1366 March 2011 © Diodes Incorporated ...

Page 10

... ZXLD1366 Document number: DS31992 Rev (cont.) ZXLD1366 Output Current L=100µ Supply Voltage (V) ZXLD1366 Output Current Deviation L=100µ Supply Voltage (V) ZXLD1366 Efficiency L=100µ Supply Voltage ( www.diodes.com A Product Line of Diodes Incorporated ZXLD1366 March 2011 © Diodes Incorporated ...

Page 11

... LEDs 05 LEDs 30% 07 LEDs 09 LEDs 20% 11 LEDs 13 LEDs 10% 15 LEDs ZXLD1366 Document number: DS31992 Rev (cont.) ZXLD1366 Switching Frequency L=100µ Supply Voltage (V) ZXLD1366 Duty Cycle L=100µ Supply Voltage ( www.diodes.com A Product Line of Diodes Incorporated ZXLD1366 March 2011 © Diodes Incorporated ...

Page 12

... ZXLD1366 Document number: DS31992 Rev (cont.) ZXLD1366 Output Current L=150µ Supply Voltage (V) ZXLD1366 Output Current Dev iation L=150µ Supply Voltage (V) ZXLD1366 Efficiency L=150µ Supply Voltage ( www.diodes.com A Product Line of Diodes Incorporated ZXLD1366 March 2011 © Diodes Incorporated ...

Page 13

... LEDs 05 LEDs 30% 07 LEDs 09 LEDs 20% 11 LEDs 13 LEDs 10% 15 LEDs ZXLD1366 Document number: DS31992 Rev (cont.) ZXLD1366 Switching Frequency L=150µ Supply Voltage (V) ZXLD1366 Duty Cycle L=150µ Supply Voltage ( www.diodes.com A Product Line of Diodes Incorporated ZXLD1366 March 2011 © Diodes Incorporated ...

Page 14

... ZXLD1366 Document number: DS31992 Rev (cont.) ZXLD1366 Output Current L=220µ Supply Voltage (V) ZXLD1366 Output Current Deviation L=220µ Supply Voltage (V) ZXLD1366 Efficiency L=220µ Supply Voltage ( www.diodes.com A Product Line of Diodes Incorporated ZXLD1366 March 2011 © Diodes Incorporated ...

Page 15

... LEDs 30% 05 LEDs 07 LEDs 20% 09 LEDs 11 LEDs 10% 13 LEDs 15 LEDs ZXLD1366 Document number: DS31992 Rev (cont.) ZXLD1366 Switching Frequency L=220µ Supply Voltage (V) ZXLD1366 Duty Cycle L=220µ Supply Voltage ( www.diodes.com A Product Line of Diodes Incorporated ZXLD1366 March 2011 © Diodes Incorporated ...

Page 16

... Document number: DS31992 Rev (cont.) LED Current vs Vadj 1 2 ADJ Pin Voltage (V) R=200mΩ R=300mΩ R=680mΩ Supply current Output transistor fully enhanced Supply voltage (V) Vref Supply voltage (V) Shutdow n current Supply voltage ( www.diodes.com A Product Line of Diodes Incorporated ZXLD1366 March 2011 © Diodes Incorporated ...

Page 17

... Supply Voltage (V) Vadj vs Temperature 0 50 100 150 Temperature (C) Lx on-resistance vs die temperature 0 50 100 Die Temperature ( www.diodes.com A Product Line of Diodes Incorporated ZXLD1366 -40C 20C 150C 12V 20V 30V 200 7V 9V 12V 20V 30V 150 200 March 2011 © Diodes Incorporated ...

Page 18

... V . When driving the ADJ pin above 1.25V, R ADJ REF exceeding 1A maximum. REF www.diodes.com A Product Line of Diodes Incorporated ZXLD1366 (=1.25V). Note that R = 0.2Ω is the REF S must be S and 14.2kΩ ±25% for voltages above March 2011 © Diodes Incorporated ) REF ...

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 ZXLD1366 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. ZXLD1366 Document number: DS31992 Rev Soft Start Time vs Capacitance from ADJ pin to Ground Capacitance (nf) =0.2Ω, L=68μH, 22nF on ADJ www.diodes.com A Product Line of Diodes Incorporated ZXLD1366 100 120 March 2011 © Diodes Incorporated ...

Page 21

... For detailed performance characteristics for the inductor values 68, 100, 150 and 220μH see graphs on pages 10-17. ZXLD1366 Document number: DS31992 Rev 10μF, an electrolytic capacitor can be used provided that a suitable 1µF IN pin as possible www.diodes.com A Product Line of Diodes Incorporated ZXLD1366 voltage: IN March 2011 © Diodes Incorporated ...

Page 22

... Figure 4. ZXLD1366 Minimum recommended inductor (DFN3030-6) ZXLD1366 Document number: DS31992 Rev Minimum Recommended Inductor 2% Accuracy, <60°C Case Temperature Supply Voltage ( Accuracy, <60°C C ase T em perature 20.00 30.00 40.00 Supply Voltage ( www.diodes.com A Product Line of Diodes Incorporated ZXLD1366 50 60 50.00 60.00 March 2011 © Diodes Incorporated ...

Page 23

... The higher forward voltage and overshoot due to reverse recovery time in silicon diodes will increase the peak voltage on the LX output 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 B3100 (Diodes Inc). ZXLD1366 Document number: DS31992 Rev ...

Page 24

... Document number: DS31992 Rev LED SENSE ZXLD1366 Figure 6. Reduced Output Ripple ) the drive to the output transistor is turned off to prevent device operation SD and 17V care must be taken to avoid excessive power www.diodes.com A Product Line of Diodes Incorporated ZXLD1366 Cled March 2011 © Diodes Incorporated ...

Page 25

... PCB. See figures 7 and 8 for examples used in the ZXLD1366 evaluation boards. Figure 7. Suggested layout for DFN3030-6 package ZXLD1366 Document number: DS31992 Rev Maximum power dissipation SO-8EP DFN3030-6 TSOT23-5 - Ambient temperature (° www.diodes.com A Product Line of Diodes Incorporated ZXLD1366 80 95 110 125 March 2011 © Diodes Incorporated ...

Page 26

... This resistor will provide filtering for low frequency noise and provide protection against high voltage transients. ZXLD1366 Document number: DS31992 Rev Its best to connect V directly to one end and V as this may give an apparent higher measure of current than is actual www.diodes.com A Product Line of Diodes Incorporated ZXLD1366 and I directly to the S SENSE March 2011 © Diodes Incorporated ...

Page 27

... Figure 9. Low frequency PWM operating waveforms ZXLD1366 Document number: DS31992 Rev ZXLD1366 GND , causing the input to the shutdown circuit to fall ADJ proportional to the PWM duty cycle. OUTavg Ton Toff www.diodes.com A Product Line of Diodes Incorporated ZXLD1366 and a low level of ADJ 0.2/Rs IOUTavg March 2011 © Diodes Incorporated ...

Page 28

... Ordering Information   Part Number ZXLD1366 Part Device Mark ZXLD1366DACTC 1366 ZXLD 1366 ZXLD1366EN8TC YYWW ZXLD1366ET5TA 1366 Where YY stands for last 2 digits of year - 10, 11 and WW stands for week number Package Outline Dimensions 1) TSOT23-5   Millimeters Dim. Min. Max 1.00 A1 0.01 0. ...

Page 29

... A1 0.00 0. 0.30 0.50 0.40 C 0.15 0.25 0.20 D 4.85 4.95 4.90 E 3.80 3.90 3.85 E0 3.85 3.95 3.90 E1 5.90 6.10 6. 1.27 F 2.75 3.35 3.05 H 2.11 2.71 2.41 L 0.62 0.82 0. 0.35 Q 0.60 0.70 0.65 All Dimensions in mm March 2011 © Diodes Incorporated ...

Page 30

... 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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