ZXLD1370EST16TC Diodes Inc, ZXLD1370EST16TC Datasheet

LED Drivers 6V TO 60V 11uA

ZXLD1370EST16TC

Manufacturer Part Number
ZXLD1370EST16TC
Description
LED Drivers 6V TO 60V 11uA
Manufacturer
Diodes Inc
Datasheet

Specifications of ZXLD1370EST16TC

High Level Output Current
18 mA
Operating Supply Voltage
6 V to 60 V
Maximum Supply Current
11 uA
Maximum Operating Temperature
+ 125 C
Package / Case
TSSOP-16 EP
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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ZXLD1370EST16TC
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Note 1:
Description
The ZXLD1370 is an LED driver controller IC for driving
external MOSFETs to drive high current LEDs. It is a
multi-topology controller enabling it to efficiently control
the current through series connected LEDs. The multi-
topology enables it to operate in buck, boost and buck-
boost configurations.
The 60V capability coupled with its multi-topology
capability enables it to be used in a wide range of
applications and drive in excess of 15 LEDs in series.
The ZXLD1370 is a modified hysteretic controller using a
patent pending control scheme providing high output
current accuracy in all three modes of operation. High
accuracy dimming is achieved through DC control and
high frequency PWM control.
The ZXLD1370 uses two pins for fault diagnosis. A flag
output highlights a fault, while the multi-level status pin
gives further information on the exact fault.
Features
Typical Application Circuit
ZXLD1370
Document number: DS32165 Rev. 4 - 2
o
o
Buck-boost diagram utilizing thermistor and T
0.5% typical output current accuracy
6 to 60V operating voltage range
LED driver supports Buck, Boost and Buck-boost
configurations
Wide dynamic range dimming
Up to 1MHz switching
High temperature control of LED current using TADJ
AEC-Q100 Grade 1
Available in “Green” Molding Compound (No Br, Sb)
with lead Free Finish/ RoHS Compliant (Note 1)
EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions
applied. Please visit our website at
http://www.diodes.com/products/lead_free.html.
20:1 DC dimming
1000:1 dimming range at 500Hz
60V HIGH ACCURACY BUCK/BOOST/BUCK-BOOST LED DRIVER-CONTROLLER WITH AEC-Q100
ADJ
www.diodes.com
1 of 36
Pin Assignments
100%
10%
I
LED
Thermal network response in Buck configuration with:
Curve showing LED current vs. T
Rth = 2kΩ and TH1=10kΩ (beta =3900)
Diodes Incorporated
A Product Line of
TSSOP-16EP
70˚C
85˚C
T
LED
© Diodes Incorporated
ZXLD1370
LED
March 2011
TH1
Rth
TAD
REF

Related parts for ZXLD1370EST16TC

ZXLD1370EST16TC Summary of contents

Page 1

... Diodes Incorporated Pin Assignments Curve showing LED current vs. T ADJ I LED 100% 10% Thermal network response in Buck configuration with: Rth = 2kΩ and TH1=10kΩ (beta =3900 www.diodes.com ZXLD1370 TSSOP-16EP LED REF Rth TAD TH1 70˚C 85˚C T LED March 2011 © Diodes Incorporated ...

Page 2

... Type refers to whether or not pin is an Input, Output, Input/Output or Power supply pin. ZXLD1370 Document number: DS32165 Rev Product Line of Diodes Incorporated Description < 2.5V) to adjust output current from 10% to 200% of ADJ , or auxiliary supply from 6V to 15V supply to reduce internal power www.diodes.com ZXLD1370 IN March 2011 © Diodes Incorporated ...

Page 3

... Document number: DS32165 Rev VIN S VAUX VIN ISENSE Error report Fast current monitor Error amp Reference Frequency & hysteresis control + COMPIN - SGND www.diodes.com A Product Line of Diodes Incorporated ZXLD1370 D LOAD L Accurate current monitor - Demand current source VAUX Gate driver PGND March 2011 © Diodes Incorporated ...

Page 4

... Min Max 6.3 6.3 60 ≤ 2.5 0 450 ADJ 0.125 2.5 1 300 1000 0 V REF 100 500 100 1000 0.002 10 2 5.5 0 0.4 -40 125 0.20 0.50 voltages, but to avoid false operation; a voltage should March 2011 © Diodes Incorporated Unit kHz °C ...

Page 5

... March 2011 © Diodes Incorporated Units µA µA µ µ µA µA ms ºC ºC µ ...

Page 6

... IN >12V, GATE is clamped AUX exceeds t , the switch will OFF STALL March 2011 © Diodes Incorporated V µA V kΩ µ µA ...

Page 7

... Input Voltage ( 24.5 29 33.5 38 Input Voltage (V) 20 24.5 29 33.5 38 Input Voltage (V) Figure 3: Efficiency vs. Input & Number of LED www.diodes.com A Product Line of Diodes Incorporated ZXLD1370 = 1.5A LED 13 LEDs 15 LEDs 42.5 47 51 42.5 47 51.5 56 60.5 42.5 47 51.5 56 60.5 March 2011 © Diodes Incorporated ...

Page 8

... Figure 6: Efficiency vs. Input Voltage & Number of LED www.diodes.com A Product Line of Diodes Incorporated ZXLD1370 = 750mA LED T = 25° AUX IN 11 LEDs 13 LEDs 15 LEDs 42.5 47 51.5 56 60.5 13 LEDs 15 LEDs 42.5 47 51.5 56 60.5 μ 13 LEDs 15 LEDs 42.5 47 51.5 56 60.5 March 2011 © Diodes Incorporated ...

Page 9

... Figure 9: Efficiency vs. Input Voltage & Number of LED www.diodes.com A Product Line of Diodes Incorporated ZXLD1370 = 150mΩ – 0.23 S RATIO T = 25° LEDs 14 LEDs 16 LEDs 34.5 38 41.5 45 48.5 12 LEDs 14 LEDs 16 LEDs 34.5 38 41.5 45 48.5 12 LEDs 14 LEDs 16 LEDs T = 25° 34.5 38 41.5 45 48.5 March 2011 © Diodes Incorporated ...

Page 10

... L EDs 5 L EDs 6 L EDs 9.5 11 12.5 Input Voltage (V) Figure 12: Efficiency vs. Input Voltage & Number of LED www.diodes.com A Product Line of Diodes Incorporated ZXLD1370 = 350mA - GI = 0.23 LED RATIO 7 LEDs 8 LEDs 14 15 LEDs 8 LEDs 14 15 EDs 8 L EDs 14 15.5 17 March 2011 © Diodes Incorporated ...

Page 11

... Gate Voltage V VIN ISM Voltage Coil /LED current 225mV /R s ZXLD1370 Document number: DS32165 Rev via IN . When the coil IN ~ VIN -225mV OFF ON Figure 14. Operating waveforms (Buck mode www.diodes.com A Product Line of Diodes Incorporated ZXLD1370 Figure 13. Buck configuration March 2011 © Diodes Incorporated ...

Page 12

... Document number: DS32165 Rev Figure 15. Boost and Buck-Boost configuration and R . The peak LED current is equal to the peak coil current. The control GI1 GI2 VIN OFF ON = average /(R LED COIL GI1 GI1 www.diodes.com A Product Line of Diodes Incorporated ZXLD1370 +R ) GI2 March 2011 © Diodes Incorporated ...

Page 13

... Figure 18. Boost and Buck-boost connection REF www.diodes.com A Product Line of Diodes Incorporated ZXLD1370 . define the nominal 100% LED current. The R S VIN ISM REF ADJ GI SGND Figure 17. Buck configuration R S VIN ISM REF ADJ R GI2 GI R GI1 SGND March 2011 © Diodes Incorporated ...

Page 14

... For example the typical application circuit, in order to get LED ADJ ZXLD1370 Document number: DS32165 Rev and MAX Ω ≤ ≤ Ω 200 350mA with IRS=1.5A the ratio has to be set as: LED ≈ www.diodes.com A Product Line of Diodes Incorporated ZXLD1370 March 2011 © Diodes Incorporated ...

Page 15

... ZXLD1370 Buck Mode 1.5A Minimum Recommended Inductor Target Switching Frequency - 400kHz L=33µH L=22µ Supply Voltage ( www.diodes.com A Product Line of Diodes Incorporated ZXLD1370 L=47µ March 2011 © Diodes Incorporated ...

Page 16

... LEDs), with a load current of 1.5A; if the target frequency is around IN ZXLD1370 Buck Mode 750mA Minimum Recommended Inductor Target Switching Frequency 400kHz L=68µH L=47µ Supply Voltage ( www.diodes.com A Product Line of Diodes Incorporated ZXLD1370 L=47µ L=100µ March 2011 © Diodes Incorporated ...

Page 17

... Target Switching Frequency > 500kHz L=68µH L=47µH L=33µ Supply Voltage (V) ZXLD1370 Buck-Boost Mode 350mA Minimum Recommended Inductor Target Switching Frequency - 400kHz L=47µH L=33µ Supply Voltage ( www.diodes.com A Product Line of Diodes Incorporated ZXLD1370 L=100µ March 2011 © Diodes Incorporated ...

Page 18

... ZXLD1370 Buck-Boost Mode 350mA Minimum Recommended Inductor Target Switching Frequency > 500kHz L=47µH L=33µ Supply Voltage (V) ZXLD1370 Boost Mode 350mA Minimum Recommended Inductor Target Switching Frequency - 400kHz L=47µH L=33µ Supply Voltage ( www.diodes.com A Product Line of Diodes Incorporated ZXLD1370 March 2011 © Diodes Incorporated ...

Page 19

... I D MOSFET RMS LED ZXLD1370 Document number: DS32165 Rev ZXLD1370 Boost Mode 350mA Minimum Recommended Inductor Target Switching frequency > 500kHz L=47µH L=33µ Supply Voltage ( LED www.diodes.com A Product Line of Diodes Incorporated ZXLD1370 The current rating is March 2011 © Diodes Incorporated ...

Page 20

... ZXLD1370 in the whole spectrum of frequencies recommended for the device (from 300kHz to 1MHz). Example 2) Using the ZXMN6A09K (V = 60V, I DS(MAX 29nC 10V G GS ZXLD1370 I = 300mA PEAK 300 mA PEAK ZXLD1370 Document number: DS32165 Rev − LOAD = 60V 8.5A): D(MAX) = 1.43MHz PERIOD = 12.2A): D(MAX www.diodes.com A Product Line of Diodes Incorporated ZXLD1370 March 2011 © Diodes Incorporated ...

Page 21

... Figure 27. Power derating curve for ZXLD1370 mounted on test board according to JESD51 ZXLD1370 Document number: DS32165 Rev 515kHz PERIOD + I Q-IN Q-AUX < 15V AUX + f • Qg) consists of the static supply current (IQ) and the current required to charge and - Ambient temperature (° www.diodes.com A Product Line of Diodes Incorporated ZXLD1370 80 95 110 125 March 2011 © Diodes Incorporated ...

Page 22

... Drain of the external MOSFET silicon diode is used, care should be taken to ensure that the total voltage appearing on the Drain of the external MOSFET, including supply ripple, does not exceed the specified maximum value. *A suitable Schottky diode would be PDS3100 (Diodes Inc). OUTPUT CAPACITOR An output capacitor may be required to limit interference or for specific EMC purposes ...

Page 23

... Buck-boost D = − CIN RMS LED − ZXLD1370 Document number: DS32165 Rev Product Line of Diodes Incorporated as follows: IN-PP Use D = 0.5 as worst case Use worst case MAX use D=0.5 as worst case Use D=D as worst case MAX www.diodes.com ZXLD1370 March 2011 © Diodes Incorporated ...

Page 24

... PWM transitions, as shown in the Boost/ Buck-Boost section. ZXLD1370 Document number: DS32165 Rev Buck m ode - L=33uH - Rs = 150m Ω 1kHz PWM PWM @ 1kHz Error Buck m ode - L=33uH - Rs = 150m Ω 100Hz PWM PWM @ 100Hz Error www.diodes.com A Product Line of Diodes Incorporated ZXLD1370 10 100 10 100 March 2011 © Diodes Incorporated ...

Page 25

... GND while the FLAG and REF pins will stay at their nominal values. ZXLD1370 Document number: DS32165 Rev Figure 31. PWM dimming from MCU Gate 0V PWM 0V Figure 32. PWM dimming minimum and maximum pulse Fig 33. Stand-by state from PWM signal www.diodes.com A Product Line of Diodes Incorporated ZXLD1370 2µs < < 2µs March 2011 © Diodes Incorporated ...

Page 26

... Document number: DS32165 Rev pin and reduces output current if the voltage on this pin falls ADJ to REF. ADJ at which the current must start to decrease threshold threshold Figure 34. Thermal feedback network = 70˚ 3.3kΩ @ 70˚ www.diodes.com A Product Line of Diodes Incorporated ZXLD1370 March 2011 © Diodes Incorporated ...

Page 27

... VIN UVLO - STALL - OUT of REG 2.7V 1.8V Over Temperature 0. SEVERITY Figure 35. Status levels <=V . ADJ REF www.diodes.com A Product Line of Diodes Incorporated ZXLD1370 FLAG Nominal STATUS voltage H 4.5 L 4.5 L 3.6 L 3.6 L 3.6 L 1.8 L 0.9 Over Current 3 4 March 2011 © Diodes Incorporated ...

Page 28

... Document number: DS32165 Rev Product Line of Diodes Incorporated Fig 36. Diagnostic during Start-up when the input supply voltage at V AUX is at the minimum value of 6V. In the case of a low IN pin to less than 60V. AUX www.diodes.com ZXLD1370 below 8V. IN March 2011 © Diodes Incorporated ...

Page 29

... Take care of the max voltage drop on the Q2 MOSFET gate. ZXLD1370 Document number: DS32165 Rev Product Line of Diodes Incorporated Figure 38. OVP circuit +10% where V is maximum LED chain voltage. LEDMAX LEDMAX www.diodes.com ZXLD1370 for longer than 20ms then Z March 2011 © Diodes Incorporated ...

Page 30

... This LED driver is suitable for applications which require high LED current such as LED projector, automatic LED lighting etc. ZXLD1370 Document number: DS32165 Rev Product Line of Diodes Incorporated Figure 39: Circuit Layout www.diodes.com ZXLD1370 SHP pin AUX decoupling March 2011 © Diodes Incorporated ...

Page 31

... SMD 0805/0603 Generic SMD1206 Generic SMD1210 Generic SMD1206 Generic SMD1206 Generic SMD 0805/0603 Generic LED Current vs Input Voltage 3000 2500 2000 1500 1000 1 LED 2 LED 500 www.diodes.com A Product Line of Diodes Incorporated ZXLD1370 Input Voltage (V) Figure 42. Line regulation March 2011 © Diodes Incorporated ...

Page 32

... Diodes Inc ZXMN6A25G Diodes Inc 2N7002A Diodes Inc PDS3100-13 Diodes Inc BZT52C47 Diodes Inc 744771168 Wurth Electronik SMD 0805/0603 Generic SMD1210 Generic SMD1206 Generic SMD1206 Generic SMD 0805/0603 Generic SMD 0805/0603 Generic SMD 0805/0603 Generic www.diodes.com ZXLD1370 March 2011 © Diodes Incorporated ...

Page 33

... Figure 46. Application circuit - 700mA Buck-Boost LED driver ZXLD1370 Document number: DS32165 Rev 450 400 350 300 250 200 150 100 www.diodes.com A Product Line of Diodes Incorporated ZXLD1370 LED Current vs Input Voltage Input Voltage Figure 45. Line regulation March 2011 © Diodes Incorporated 32 ...

Page 34

... Generic SMD 0805/0603 Generic SMD 0805/0603 Generic SMD 0805/0603 Generic SMD 0805/0603 Generic 800 700 600 500 400 300 200 100 www.diodes.com A Product Line of Diodes Incorporated ZXLD1370 LED Current vs Input Voltage Input Voltage Figure 48. Line regulation March 2011 © Diodes Incorporated 20 ...

Page 35

... Ordering Information Device Packaging ZXLD1370EST16TC TSSOP-16EP Where YY is last two digits of year and WW is two digit week number Package Data TSSOP-16EP ZXLD1370 Document number: DS32165 Rev Product Line of Diodes Incorporated Part Reel Status Marking Quantity ZXLD Active 1370 2500 YYWW www.diodes.com ...

Page 36

... 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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