|
|
PDF ZXLD1374 Data sheet ( Hoja de datos )
| Número de pieza | ZXLD1374 | |
| Descripción | 60V HIGH ACCURACY 1.5A BUCK/BOOST/BUCK-BOOST LED DRIVER CONVERTER | |
| Fabricantes | Zetex Semiconductors | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de ZXLD1374 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
|
No Preview Available !
www.DataSheet.co.kr
A Product Line of
Diodes Incorporated
ZXLD1374
60V HIGH ACCURACY 1.5A BUCK/BOOST/BUCK-BOOST LED DRIVER CONVERTER
Description
The ZXLD1374 is an LED driver converter IC with integrated
1.5A low side switch to drive high current LEDs. It is a multi-
topology converter 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 16 LEDs in series.
The ZXLD1374 is a modified hysteretic converter using a
patent pending control scheme providing high output current
accuracy in all three topologies. High accuracy dimming is
achieved through DC control and high frequency PWM
control.
The ZXLD1374 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.
Pin Assignments
TSSOP-20EP
ADJ 1
REF 2
TADJ 3
SHP 4
STATUS 5
SGND 6
PGND 7
PGND 8
N/C 9
N/C 10
Thermal
Pad
ZXLD1374
20 GI
19 PWM
18 FLAG
17 ISM
16 VIN
15 VAUX
14 LX
13 LX
12 N/C
11 N/C
Features
• 0.5% typical output current accuracy
• 6.3 to 60V operating voltage range
• 1.5A integrated low side switch
• LED driver supports Buck, Boost and Buck-boost
topologies
• Wide dynamic range dimming
o 20:1 DC dimming
o 1000:1 dimming range at 500Hz
• Up to 1MHz switching
• High temperature control of LED current using TADJ
• Green mold compound (No Br, Sb) and RoHS
compatible
Typical Application Circuit
Curve showing LED current vs. TLED
ZXLD1374
Document number: DS35032 Rev. 1 - 2
Page 1 of 35
www.diodes.com
October 2010
© Diodes Incorporated
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
www.DataSheet.co.kr
A Product Line of
Diodes Incorporated
ZXLD1374
Electrical Characteristics (Test conditions: VIN = VAUX = 12V, TA = 25°C, unless otherwise specified.)
Symbol
Parameter
Conditions
Min Typ Max Units
Output Parameters
VFLAGL FLAG pin low level output voltage
Output sinking 1mA
0.5 V
IFLAGOFF FLAG pin open-drain leakage current VFLAG=40V
1 µA
Normal operation
4.2 4.5 4.8
Out of regulation (VSHP out of range)
(Note 7)
3.3
3.6
3.9
VIN under-voltage (VIN < 5.6V)
3.3 3.6 3.9
VSTATUS
STATUS Flag no-load output voltage
(Note 6)
Switch stalled (tON or tOFF> 100µs)
LX over-voltage state (VLX >60V)
3.3 3.6 3.9
2.4 2.7 3.0
V
Over-temperature (TJ > 125°C)
1.5 1.8 2.1
Excess sense resistor current
(VSENSE > 0.375V)
0.6 0.9 1.2
Excessive switch current (ISW>1.5A) 0.6 0.9 1.2
RSTATUS Output impedance of STATUS output Normal operation
10 kΩ
Low side switch output (LX pins tied together)
ILX-LG Low side switch leakage current
Output stage off, VLX = 60V (Note 8)
60
µA
RDS(ON) LX pin MOSFET on resistance
ILX = 1.5A (tON < 100µs)
0.5 0.8
Ω
tPDHL Propagation delay high-low
86 ns
tPDLH
tLXR
Propagation delay low-high
LX output rise time
VSENSE = 225mV ± 30%, CL = 680pF,
RL = 120Ω
131
208
ns
ns
tLXF LX output fall time
12 ns
tSTALL
Time to assert ‘STALL’ flag and
warning on STATUS output
(Note 9)
LX low or high
100 170 µs
LED Thermal control circuit (TADJ) parameters
VTADJH
VTADJL
ITADJ
Upper threshold voltage
Lower threshold voltage
TADJ pin Input current
Onset of output current reduction
(VTADJ falling)
Output current reduced to <10% of
set value (VTADJ falling)
VTADJ = 1.25V
560 625 690 mV
380 440 500 mV
1 µA
Notes: 6. In the event of more than one fault/warning condition occurring, the higher priority condition will take precedence. E.g.
‘Excessive coil current’ and ‘Out of regulation’ occurring together will produce an output of 0.9V on the STATUS pin. The
voltage levels on the STATUS output assume the Internal regulator to be in regulation and VADJ<=VREF. A reduction of the
voltage on the STATUS pin will occur when the voltage on VIN is near the minimum value of 6V.
7. Flag is asserted if VSHP<2.5V or VSHP>3.5V
8. With the device still in switching mode the LX pin has an over-voltage detection circuit connected to it with a resistance of
approximately 1MΩ.
9. If tON exceeds tSTALL, LX turns off and then an initiate a restart cycle occurs. During this phase, ADJ is grounded internally and
the SHP pin is switched to its nominal operating voltage, before operation is allowed to resume. Restart cycles will be repeated
automatically until the operating conditions are such that normal operation can be sustained. If tOFF exceeds tSTALL, the switch
will remain off until normal operation is possible.
ZXLD1374
Document number: DS35032 Rev. 1 - 2
Page 5 of 35
www.diodes.com
October 2010
© Diodes Incorporated
Datasheet pdf - http://www.DataSheet4U.net/
5 Page 
www.DataSheet.co.kr
A Product Line of
Diodes Incorporated
ZXLD1374
Typical Characteristics – Boost mode – RS = 150mΩ - L = 33µH – ILED = 350mA – GIRATIO = 0.23 – with bootstrap
0.3 85
0.3 68
0.3 50
0.3 33
0.3 15
6.5
8
70 0
60 0
50 0
40 0
30 0
20 0
TA = 25°C
L = 33µH
100 RS = 150mΩ
RGI1 = 36m Ω
RGI2 = 120mΩ
0
6.5 8
10 0%
95 %
11 LE Ds
13 LEDs
15 LEDs
9 LEDs
5 LEDs
7 LEDs
9.5
11
12 .5
14
Input Voltage (V)
Figure 20. Load Current vs. Input Voltage and Number of LED
TA = 2 5°C
L = 3 3µH
RS = 1 50mΩ
RGI1 = 36mΩ
RGI2 = 120mΩ
15 .5
17
5 LEDs
15 LEDs
13 LEDs
11 LED s
9 LEDs
7 LEDs
9.5 11 12.5 14
Input Voltage (V)
Figure 21. Frequency vs. Input Voltage and N umber of LED
5 LED s
15 .5
7 LED s
17
90 %
15 LEDs
85 %
80 %
9 LED s
11 LED s
13 LEDs
75 %
70 %
6.5
8
ZXLD1374
Document number: DS35032 Rev. 1 - 2
TA = 25°C
L = 33µH
RS = 150mΩ
9.5 11 12.5 14
Input Voltage (V)
Figure 22. Efficiency vs. Input Voltage and Number of LED
15 .5
Page 11 of 35
www.diodes.com
17
October 2010
© Diodes Incorporated
Datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet ZXLD1374.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| ZXLD1370 | 60V HIGH ACCURACY BUCK/BOOST/BUCK-BOOST LED DRIVER CONTROLLER |  Diodes |
| ZXLD1370Q | AUTOMOTIVE COMPLIANT 60V HIGH ACCURACY BUCK/BOOST/BUCK-BOOST LED DRIVER-CONTROLLER | Diodes |
| ZXLD1371 | 60V HIGH ACCURACY BUCK/BOOST/BUCK-BOOST LED DRIVER CONTROLLER | Diodes |
| ZXLD1371Q | AUTOMOTIVE COMPLIANT 60V HIGH ACCURACY BUCK/BOOST/BUCK-BOOST LED DRIVER-CONTROLLER | 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 |