|
|
PDF PT1304 Data sheet ( Hoja de datos )
| Número de pieza | PT1304 | |
| Descripción | Low-Side N-Channel DC-DC Controller | |
| Fabricantes | PowTech | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de PT1304 (archivo pdf) en la parte inferior de esta página. Total 7 Páginas | ||
|
No Preview Available !
PT1304
High Efficiency, Low-Side N-Channel
DC-DC Controller with Accurate Input Current Limit
GENERAL DESCRIPTION
The PT1304 is a current mode DC-DC controller
providing excellent AC and DC line and load regulation.
It is suitable for use in topologies requiring low side
NMOSFET, such as boost, fly-back or SEPIC. The
internal soft-start reduces the inrush current at startup.
The PT1304 provides ±2% output voltage accuracy. It
consumes only 300uA quiescent current during normal
operation and typically 0.1uA during shut down. The
PT1304 has built in fault condition protection features
such as short-circuit protection, and under voltage
lock-out. The PT1304 also has an OVLO function that
locks out the EXT when the input voltage is higher than
6.9V, although the EN, VIN, CS and EXT pins can
stand up to 18V. The PT1304 incorporates
programmable average current limiting with ±2%
accuracy, which allows accurate limiting of the average
current in the inductors, independent of peak current.
The operating input voltage range of the PT1304 is 3V
to 5.5V. Excellent EMI performance is achieved with
Powtech’s proprietary frequency jittering technique
together with soft-drive control.
The PT1304 is available in SOP8 and MSOP8
packages.
FEATURES
z High Output Voltage Accuracy: ±2%
z ±2% Programmable Average Current Limiting
z Current Mode Operation for Excellent Line and
Load Transient Response
z Frequency Jittering and Soft-Drive to Minimize
EMI
z Internal Soft Start
z 18V Capability at VIN, EN, CS and EXT pins
z 300uA Quiescent and 0.1uA Shutdown Current
z Short-Circuit Protection
z UVLO with Hysteresis
z OVLO with Hysteresis
APPLICATIONS
z Battery Chargers
z DC-DC Converters
z Li-ion and USB Powered Systems
z Portable Instruments
z Step-up/step-down and Isolated dc/dc converters
z LCD backlighting
ORDERING INFORMATION
TEMPERATURE
PACKAGE
RANGE
ORDERING PART
NUMBER
MSOP8
-40~85℃
PT1304EMSH
SOP8
-40~85℃
PT1304ESOH
Note:
xxxxxX
Assembly Factory Code
Lot Number
TRANSPORT
MEDIA
Tape and Reel
Tape and Reel
MARKING
PT1304
xxxxxX
PT1304
xxxxxX
China Resources Powtech (Shanghai) Limited
PT1304_DS Rev EN_1.0
WWW.CRPOWTECH.COM
Page 1
1 page  
PT1304
High Efficiency, Low-Side N-Channel
DC-DC Controller with Accurate Input Current Limit
ELECTRICAL CHARACTERISTICS
(VIN = 5V, TA = 25℃, unless otherwise specified.)
SYMBOL
VIN
VFB
(Note3)
△VFB
VLOADREG
(Note4)
PARAMETER
Input Voltage Range
FB Reference Voltage
Reference Voltage
Line Regulation
Output Voltage Load
Regulation
CONDITIONS
IOUT = 0
VIN=3Vto5V
ILOAD=0
to 300mA
MIN
3
1
TYP
MAX UNIT
6V
1.02 1.04 V
0.2 %
3%
FS Nominal Oscillator
300 350 400 kHz
Frequency
RF=400K
DMAX
Maximum Duty Cycle
RF=400K
95 %
IS
Input DC Bias Current
VFB=1.2V
300 500 uA
ISHD Shut Down Current
VEN=0
0.1 1 uA
VENH
EN “H” Input Threshold
1.5
V
VENL
EN “L” Input Threshold
0.3 V
VUVLO
Under Voltage LockOut
Threshold
2.1 2.3 2.5 V
△VUVLO
Under Voltage LockOut
Threshold Hysteresis
200 mV
VOVLO
Over Voltage LockOut
Threshold
6.4 6.9 7.4 V
△VOVLO
Over Voltage LockOut
Threshold Hysteresis
200 mV
TSS
VIN -VCS
(Note3,5)
Soft Start Time
Current Sense Voltage
RF=400K
94
2 ms
96 98 mV
IST Short Circuit Current VOUT=0V
150 mA
Note3: The spec of these parameters can be adjusted in a little range by changing metal layer.
Note4: The 3% regulation only applies to SEPIC applications. For the applications using boost and flyback
architectures, the load regulation should typically be 0.5%.
Note5：Average current limit technique is adopted in this IC, the average inductor current, IAVG, is calculated from
VIN and VCS according to the following formula:
I AVG
= V IN − VCS
RS
China Resources Powtech (Shanghai) Limited
PT1304_DS Rev EN_1.0
WWW.CRPOWTECH.COM
Page 5
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet PT1304.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| PT130 | Triacs |  Hutson Industries |
| PT1301 | Low Voltage Step-up DC/DC Converter | PowTech |
| PT1302 | High Efficiency Step-up DC/DC Converter | PowTech |
| PT1302B-C2 | 5mm Phototransistor |  Everlight |
| 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 |