|
|
PDF PT1115 Data sheet ( Hoja de datos )
| Número de pieza | PT1115 | |
| Descripción | 1.5A Constant Voltage and Constant Current Buck | |
| Fabricantes | Powtech | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de PT1115 (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
|
No Preview Available !
PT1115
1.5A Constant Voltage and Constant Current
Buck with Cable Resistance Compensation
GENERAL DESCRIPTION
The PT1115 is a low cost, high efficiency pulse-width
modulated (PWM) switching mode buck converter with
both constant voltage (CV) and constant current (CC)
functions. The input voltage of PT1115 can be as high
as 35V at which the over-voltage protection is triggered.
The Vin pin is capable of sustaining 48V that further
improves the reliability of the PT1115 under the
conditions of hot swap and surging voltages. In the CC
mode, the output current variation is less than ±4% of
the nominal value which can be set up to 1.5A by the
current sensing resistor. In the CV mode, the feedback
voltage is controlled within ±2%. In the PT1115, output
cable wire resistance compensation, is implemented to
offset up to 600mV voltage drop along the cable. The
amount of compensation can be programmed by an
external resistor based on the cable resistance.
The PT1115 based system can achieve better EMI
performance because of spread spectrum. The PT1115
provides protections of over-voltage, under-voltage
lockout, short-ground, peak current limit, and
over-temperature shutdown to guarantee safe
applications under extreme conditions.
The PT1115 is available in a SOP-8 package
FEATURES
z 7.2~35V operating input voltage range
z 700 kHz fixed switching frequency.
z PWM control
z ±4% output current accuracy in the CC mode
z 0.5~1.5A output current set by a small current
sensing resistor
z ±2% feedback voltage accuracy in the CV mode
z Cable wire resistance compensation.
z Input and output over voltage protection (OVP)
z Short-ground protection
z Cycle-by-cycle switching peak current limit
z Soft start for power-up
z 150oC over temperature shutdown
z under-voltage lockout (UVLO)
z Frequency dithering to reduce EMI
z 100mW no load power consumption
z SOP-8 package
APPLICATIONS
z Automobile chargers
z Step-down DC/DC conversion
z LCD TVs
z Larger current battery charging adaptors
TYPICAL APPLICATION CIRCUIT
VIN
Cin
10uF
Rc
Cc
VIN
COMP
GND
SW
BS
IS
VOUT
VFB
10uH
C1
D1
Rs VOUT
R1
Cout
22uF
R2
China Resources Powtech (Shanghai) Limited
PT1115_DSB Rev EN_0.1
WWW.CRPOWTECH.COM
Page1
1 page  
PT1115
1.5A Constant Voltage and Constant Current
Buck with Cable Resistance Compensation
APPLICATION INTRODUCTION
1. cable compensation
In the PT1115, output cable wire resistance
compensation, is implemented to offset up to
600mV voltage drop along the cable. The amount
of compensation can be programmed by an
external resistor based on the cable resistance.
(1) when constant voltage (CV mode)
Cbs=10nf, no cable compensation,
Output _Voltage = Vout,typ
C1=47nf,
Output _Voltage = Vout,typ + 1⋅ (Vis − Vout )
C1=100nf,
Output _Voltage = Vout,typ + 2 ⋅ (Vis − Vout )
C1=220nf,
Output _Voltage = Vout,typ + 3 ⋅ (Vis − Vout )
Vout,typ = 5V ,
(2) when constant current (CC mode)
Vis − Vout ≈ 0.2V , when CC change to
CV, output voltage is
C1=10nf, no cable compensation,
Output _Voltage = Vout,typ
C1=47nf,
Output _Voltage = Vout,typ + 1∗ 0.2
C1=100nf,
Output _Voltage = Vout,typ + 2 ∗ 0.2
C1=220nf,
Output _Voltage = Vout,typ + 3 ∗ 0.2
C1 is connected between bs and sw pins
China Resources Powtech (Shanghai) Limited
PT1115_DSB Rev EN_0.1
WWW.CRPOWTECH.COM
Page5
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet PT1115.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| PT111 | Melt Pressure Transducer |  HAOYING |
| PT1115 | 1.5A Constant Voltage and Constant Current Buck | Powtech |
| PT111B | Melt Pressure Transmitter | HAOYING |
| 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 |