|
|
PDF SD42527 Data sheet ( Hoja de datos )
| Número de pieza | SD42527 | |
| Descripción | 1A HIGH POWER LED DRIVER | |
| Fabricantes | Silan | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de SD42527 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
|
No Preview Available !
SD42527_Datasheet
1A HIGH POWER LED DRIVER WITH 6~60V INPUT
DESCRIPTION
The SD42527 is a step-down PWM control LED driver with a built-
in power MOSFET. It achieves 1A continuous output current in
6~60V input voltage range. It provides thermal shutdown circuit,
current limit circuit and PWM dimming circuit.
The SD42527 adopts current mode control which provides fast
transient response, excellent constant current characteristic and
simple loop stabilization design. It has high efficiency up to 96%,
and has excellent constant current characteristic. When the
input/output voltage changed, the output current change rate is
within ±1.5%.
SOP-8-225-1.27
ESOP-8-225-1.27
(with heatsink at the bottom)
FEATURES
* 6～60V input voltage range;
* Maximum 1A output current;
* 0.60Ω built-in power MOSFET;
* Integrate Jitter function;
* Thermal compensation;
* PWM dimming function;
* 300kHz fixed frequency;
* Output current accuracy between ICs: ±3%;
* High efficiency up to 96%;
* Over temperature protection;
* Cycle-by-cycle over current protection.
* Dedicated current limit
* Open-circuit detection & protection
* ADJ voltage detection
* Short-circuit protection
* 90% Maximum duty cycle operation
APPLICATIONS
* LED building illumination;
* LED street lamp.
ORDERING INFORMATION
Part No.
SD42527
SD42527TR
SD42527E
SD42527ETR
Package
SOP-8-225-1.27
SOP-8-225-1.27
ESOP-8-225-1.27
ESOP-8-225-1.27
Marking
SD42527
SD42527
SD42527E
SD42527E
Material
Pb free
Pb free
Pb free
Pb free
Packing
Tube
Tape&Reel
Tube
Tape&Reel
HANGZHOU SILAN MICROELEC TRONICS CO.,L TD
Http://www.silan.com.cn
REV:1.1
201 1.08.02
Page 1 of 13
http://www.Datasheet4U.com
1 page  
SD42527_Datasheet
IOUT
=
VIN
− VSENSE
RS
3. Current limiting
SD42527 is current mode IC with internal cycle-by-cycle current limiting function. Voltage on COMP should
be no higher than 2.2V. The current limiting comparator is adopted, so the peak current of MOS is limited
at about 1.6A.
4. Frequency jitter
SD42527 has internal frequency jitter function to improve the EMI performance of the system. The internal
frequency is hopping in a very small range to reduce the single frequency radiation which simplifies the EMI
design.
5. Thermal compensation and linear dimming function
SD42527 has linear dimming and thermal compensation functions.
Linear dimmin g function: Set the output c urrent by adju st the ratio of R1 and R2. The relation between
voltage on pin ADJ and output current Iout is shown below:
VADJ ≥ 1.22V
,
IOUT
0.1
= RS
0.08V < VADJ < 1.22V ,
IOUT
=
0.1
RS ×
VADJ
1.22
VA DJ < 0.08V ，IOUT = 0
ADJ voltage is auto measured. When it is lower than 0.08V, IOUT=0. Then LED can be well turned off in
linear dimming.
Thermal compensation function: the application circuit is show n abov e, use NTC resistor to take place of
R2 for therma l compensatio n. In normal t emperature, the voltage on R2 is higher than 1.22V, a nd 100 %
current is delivered to outp ut; when LED temperature detected by R2 is higher th an the setting value Tth ,
the voltage on R2 is lo wer than 1.22V, and output current w ill decr ease follo wing the rising temperature.
Connect NTC R2 with other resistor in series to get different LED falling curves under different current.
If thermal compensation and linear dimming are not used, connect ADJ to VDD.
HANGZHOU SILAN MICROELEC TRONICS CO.,L TD
Http://www.silan.com.cn
REV:1.1
201 1.08.02
Page 5 of 13
5 Page 
PACKAGE OUTLINE
ESOP-8-225-1.27
SD42527_Datasheet
UNIT: mm
Note:
Please soldering together of PCB copper foil and pad which is at the bottom of ESOP package, and enlarge
copper foil on PCB for heat dissipation. Better for more plated-thru holes on PCB attached to PAD.
HANGZHOU SILAN MICROELEC TRONICS CO.,L TD
Http://www.silan.com.cn
REV:1.1 201 1.08.02
Page 11 of 13
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet SD42527.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| SD42522 | 1A High Power LED Driver | Silan |
| SD42524 | 1A High Power LED Driver | Silan |
| SD42525 | HIGH-EFFICIENCY HYSTERESIS LED DRIVER |  Silan Microelectronics |
| SD42525ETR | HIGH-EFFICIENCY HYSTERESIS LED DRIVER | Silan Microelectronics |
| 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 |