|
|
PDF UC3551 Data sheet ( Hoja de datos )
| Número de pieza | UC3551 | |
| Descripción | ADVANCED PWM STEP-UP DC-DC CONVERTER | |
| Fabricantes | Unisonic Technologies | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de UC3551 (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
|
No Preview Available !
UNISONIC TECHNOLOGIES CO., LTD
UC3551
Preliminary
ADVANCED PWM STEP-UP
DC-DC CONVERTER
CMOS IC
DESCRIPTION
The UTC UC3551 is a step-up DC/DC converter with high
efficiency and low start-up voltage. It is operaded in stable
waveforms without external compensate. This device incorporates
an adaptive current mode PWM control loop in which an error
amplifier, ramp generator, comparator, switch pass element and
driver are included. Besides, this circuit provides a stable and high
efficient operation over a wide range of load currents.
The UTC UC3551 features high switching rate which is up to 450
KHz, making the external component counts less required.
Moreover, it features 17μA low quiescent current, which makes the
battery life longer. The low start-up input voltage below 1V makes
UTC UC3551 suitable for 1 to 4 battery cells applications of
providing up to 300mA output current.
Two external resistors determine the value of the output voltage.
The external power devices (NMOS or NPN) are derived by both
internal 2A switch and driver.
The UTC UC3551 is intended to be used in PDA, DSC, LCD
Panel, RF-Tags, MP3, portable instrument and wireless equipment.
FEATURES
* Low Start-up Input Voltage is as Low as 1.0V
* Efficiency up to 90%
* High Supply Capability to Deliver 3.3V 100mA with 1 Alkaline Cell
* Quiescent (Switch-off) Supply Current: 17µA
* Zero Shutdown Mode Supply Current
* Fixed Switching Frequency: 450KHz
* Both Internal and External Power Switches for Maximum Flexibility
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
UC3551L-AG6-R
UC3551G-AG6-R
Package
SOT-26
UC3551L-AG6-R
(1)Packing Type
(2)Package Type
(3)Lead Free
(1) R: Tape Reel
(2) AG6: SOT-26
(3) G: Halogen Free, L: Lead Free
Packing
Tape Reel
www.unisonic.com.tw
Copyright © 2011 Unisonic Technologies Co., Ltd
1 of 6
QW-R502-555.a
1 page  
UC3551
TEST CIRCUIT
VIN CIN
100µF
L1
3.3~10µH
EXT
Preliminary
D1
D1N5819
C2
1µF
VDD
LX
UTC UC3551
EXT
GND
EN
FB
C1 R1
102 3M
R2
1M
CMOS IC
VOUT
COUT
100µF
TYPICAL APPLICATION CIRCUIT
D1
D1N5819
C2
1µF
VIN CIN
100µF
L1
3.3~10µH
VDD
LX
UTC UC3551
EXT EXT
GND
EN
FB
C1 R1
102 3M
R2
1M
VOUT
COUT
100µF
VIN CIN
100µF
D1
D1N5819
C2
1µF
L1
3.3~10µH
LX
M1
EXT
NMOS
VDD
UTC UC3551
GND
EN
FB
C1 R1
102 3M
R2
1M
VOUT
COUT
100µF
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 6
QW-R502-555.a
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet UC3551.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| UC3550 | PWM/PFM SWITCHABLE STEP-UP DC-DC CONTROLLER | Unisonic Technologies |
| UC3551 | ADVANCED PWM STEP-UP DC-DC CONVERTER | Unisonic Technologies |
| UC3552 | PWM DC-DC CONVERTER | Unisonic Technologies |
| 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 |