|
|
PDF ZXLD1360Q Data sheet ( Hoja de datos )
| Número de pieza | ZXLD1360Q | |
| Descripción | AUTOMOTIVE GRADE 30V 1A LED DRIVER | |
| Fabricantes | Diodes | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de ZXLD1360Q (archivo pdf) en la parte inferior de esta página. Total 22 Páginas | ||
|
No Preview Available !
ZXLD1360Q
AUTOMOTIVE GRADE 30V 1A LED DRIVER
Description
The ZXLD1360Q is a continuous mode inductive step-down
converter with integrated switch and high side current sense.
It operates from an input supply from 7V to 30V driving single or
multiple series connected LEDs efficiently externally adjustable
output current up to 1mA.
The output current can be adjusted by applying a DC voltage or a
PWM waveform to the ADJ pin; 100:1 adjustment of output current is
possible using PWM control. Applying 0.2V or lower to the ADJ pin
turns the output off and switches the device into a low current
standby state.
The ZXLD1360Q has been qualified to AEC-Q100 Grade 1 and is
Automotive Grade supporting PPAPs.
Pin Assignments
(TOP VIEW)
LX 1
GND 2
5 VIN
ADJ 3
TSOT25
4 ISENSE
Features
Simple low parts count
Single pin on/off and brightness control using DC voltage or
PWM
High efficiency (up to 95%)
Wide input voltage range: 7V to 30V
40V transient capability
Up to 1MHz switching frequency
Typical 4% output current accuracy
Available in thermally enhanced Green molding packages
TSOT25
JA = +82°C/W
Totally Lead-free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Automotive Grade
Qualified to AEC-Q100 Grade 1
Supports PPAP documents (Note 4)
Typical Application Circuit
TSOT25
Notes: 1.
2.
3.
4.
No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
Automotive products are AEC-Q100 qualified and are PPAP capable. Automotive, AEC-Q100 and standard products are electrically and thermally the
same, except where specified. For more information, please refer to http://www.diodes.com/quality/product_compliance_definitions/.
ZXLD1360Q
Document number: DS37115 Rev. 1 - 2
1 of 22
www.diodes.com
September 2015
© Diodes Incorporated
1 page  
ZXLD1360Q
Device Description
The device, in conjunction with the coil (L1) and current sense resistor (RS), forms a self-oscillating continuous-mode buck converter.
Device Operation (Refer to Figure 1 - Block diagram and Figure 2 Operating Waveforms)
VIN
LX voltage
SENSE voltage
0V
VIN
230mV
Toff Ton
170mV
Coil current
Comparator
input voltage
0V
VADJ
0.15VADJ
200mV
VSENSE-
VSENSE+
IOUTnom +15%
IOUTnom
IOUTnom -15%
0.15VADJ
Comparator
output
5V
0V
Figure 2 Operating Waveforms
Operation can be best understood by assuming that the ADJ pin of the device is unconnected and the voltage on this pin (VADJ) appears
directly at the (+) input of the comparator.
When input voltage VIN is first applied, the initial current in L1 and RS is zero and there is no output from the current sense circuit. Under this
condition, the (-) input to the comparator is at ground and its output is high. This turns MN on and switches the LX pin low, causing current to
flow from VIN to ground, via RS, L1 and the LED(s). The current rises at a rate determined by VIN and L1 to produce a voltage ramp (VSENSE)
across RS. The supply referred voltage VSENSE is forced across internal resistor R1 by the current sense circuit and produces a proportional
current in internal resistors R2 and R3. This produces a ground referred rising voltage at the (-) input of the comparator. When this reaches
the threshold voltage (VADJ), the comparator output switches low and MN turns off. The comparator output also drives another NMOS switch,
which bypasses internal resistor R3 to provide a controlled amount of hysteresis. The hysteresis is set by R3 to be nominally 15% of VADJ.
When MN is off, the current in L1 continues to flow via D1 and the LED(s) back to VIN. The current decays at a rate determined by the LED(s)
and diode forward voltages to produce a falling voltage at the input of the comparator. When this voltage returns to VADJ, the comparator
output switches high again. This cycle of events repeats, with the comparator input ramping between limits of VADJ ± 15%.
Switching thresholds
With VADJ = VREF, the ratios of R1, R2 and R3 define an average VSENSE switching threshold of 100mV (measured on the ISENSE pin with
respect to VIN). The average output current IOUTnom is then defined by this voltage and RS according to:
IOUTnom = 100mV/RS
Nominal ripple current is ±15mV/RS
ZXLD1360Q
Document number: DS37115 Rev. 1 - 2
5 of 22
www.diodes.com
September 2015
© Diodes Incorporated
5 Page 
ZXLD1360Q
Typical Operating Characteristics (cont.)
ZXLD1360 Response Time vs. Temperature
Ty pical minimum LX ‘on’ and ‘off’ time
35 0
LX Switch “On” Resistance vs. Temperature
0.8 0
300 0.70
25 0
0.6 0
20 0
0.5 0
15 0
0.4 0
10 0
50 0.30
0
-55 -35 -15 5 25 45 65 85 105 125
Ambient Temperature (C)
Min LX on
Min LX of f
1.2 4
VADJ vs. Temperature
L = 470µH, RS = 0.33
0.2 0
-50
0 50 100 150
Ambient Temperature (C)
20 0
Voltage Across RSENSE (0.333) vs. Temperature
10 0.4
10 0.2
1.2 35
1.2 3
10 0
99 .8
99 .6
1.2 25
1.2 2
99 .4
99 .2
99
1.2 15
1.2 1
-55 -35 -15 5 25 45 65 85 105 125
Ambient Temperature (C)
12V, Single LED
12V, Three LED
24V, Single LED
24V, Three LED
Output Current Change vs. Temperature
VIN = 12V, L = 470µH, RS = 0.33
0.5
98 .8
98 .6
98 .4
-55 -35 -15 5 25 45 65 85 105 125
Ambient Temperature (C)
12V, Single LED
12V, Three LED
24V, Single LED
24V, Three LED
Output Current Change vs. Temperature
VIN = 24V, L = 470µH, RS = 0.33
0.4
0.4
0.2
0.3
0.2 0
0.1 -0.2
0
-0.1 -0.4
-0.2 -0.6
-0.3
-0.8
-0.4
-0.5
-55 -35 -15 5 25 45 65 85
Ambient Temperature (C)
12V, Single LED
12V, Three LED
ZXLD1360Q
Document number: DS37115 Rev. 1 - 2
105 125
11 of 22
www.diodes.com
-1
-55 -35 -15 5 25 45 65 85 105 125
Ambient Temperature (C)
24V, Single LED
24V, Three LED
September 2015
© Diodes Incorporated
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet ZXLD1360Q.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| ZXLD1360 | 1A LED driver |  Zetex Semiconductors |
| ZXLD1360Q | AUTOMOTIVE GRADE 30V 1A LED DRIVER | Diodes |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |