|
|
PDF EUP2681 Data sheet ( Hoja de datos )
| Número de pieza | EUP2681 | |
| Descripción | TFT LCD DC-DC Converter | |
| Fabricantes | Eutech Microelectronics | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de EUP2681 (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
|
No Preview Available !
EUP2681
TFT LCD DC-DC Converter with Integrated
Charge Pumps, OP-AMP and HV-Switch
DESCRIPTION
The EUP2681 generates power supply rails for thin-film
transistor (TFT) liquid-crystal display (LCD) panels in
monitors and notebooks operated from 2.5V to 5.5V input
supply. The device integrates a step-up converter, positive
and negative charge pumps, a high speed VCOM buffer and a
HV-Switch.
The external compensated step-up converter features an
internal power MOSFET and high frequency operation
allowing to use small inductors and capacitors. The step up
converter uses fixed-frequency peak current mode control
architecture which provides fast load-transient response and
easy compensation. A 3.5A peak current limit for the
internal switch protects power supply fault condition.
The regulated positive and negative charge pump regulators
generate the positive and negative supply rails for the TFT
LCD gate resistive voltage-divider ICs.
The high speed VCOM buffer features 500mA short circuit
current, 20MHz bandwidth, fast slew rate 45V/µs, and
rail-to-rail inputs and outputs.
The HV-Switch circuit control provides the ability to
control the slope for the gate drive voltage. It shapes the
TFT gate high voltage to improve image quality.
The EUP2681 is available in a small (4mm× 4mm) 24 pin
TQFN package and operates over the -40ºC to +85ºC
temperature range.
FEATURES
2.5V to 5.5V Input Supply Range
1.2MHz Current Mode Step Up Converter
- Built-In 20V, 3.5A, 0.16Ω N-MOSFET
- High Efficiency Up to 90%
- Internal digital Soft-Start
- Fast Transient Response to Pulsed Load
- Over-Temperature Protection
Regulated Charge pump for TFT gate-on Supply
Regulated Charge pump for TFT gate-off Supply
High Speed High Current 18V VCOM Buffer
- 20MHz BW
- 45V/µS Slew Rate
- More than 500mA Peak Output Current
HV-Switch Circuit
- Adjustable Falling rate
- Reduction of Coupling Effect between Gate Line
and Pixel
- Flicker Compensation Circuit
Input Under Voltage Lockout and Thermal Protection
24 pin 4mm×4mm TQFN Package
RoHS Compliant and 100% Lead (Pb)-Free
Halogen-Free
APPLICATIONS
LCD Monitors
Notebook Display
LCD TVs
DS2681 Ver1.1 Aug. 2012
1
1 page  
EUP2681Tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com
Absolute Maximum Ratings (1)
VCC, CTL, RSTIN, RST to AGND ---------------------------------------------------- -0.3V to +6V
DEL, REF, COMP, FB, FBN,FBP to AGND --------------------------------- -0.3V to (VCC+0.3V)
PGND, BGND to AGND ---------------------------------------------------------------- -0.3V to +0.3V
LX to PGND ------------------------------------------------------------------------------ -0.3V to +20V
SUP to PGND ----------------------------------------------------------------------------- -0.3V to +20V
DRVN, DRVP to PGND ------------------------------------------------------ -0.3V to (VSUP + 0.3V)
SRC, COM, DRN to AGND ------------------------------------------------------------ -0.3V to + 36V
DRN to COM ----------------------------------------------------------------------------- -30V to +30V
SRC to SUP ------------------------------------------------------------------------------- 23V
REF Short Circuit to AGND ------------------------------------------------------------ Continuous
POS, NEG, OUT to AGND --------------------------------------------------- -0.3V to (VSUP + 0.3V)
DRVN, DRVP RMS Current ------------------------------------------------------------ 200mA
LX, PGND RMS Current Rating ------------------------------------------------------- 2.4A
Continuous Power Dissipation (T A= +70°C)
24-Pin TQFN (derate 27.8mW/°C above +70°C) ------------------------------------ 2222mW
Junction Temperature -------------------------------------------------------------------- +150°C
Storage Temperature Range ------------------------------------------------------------- -65°C to +160°C
Lead Temp (Soldering, 10sec) ---------------------------------------------------------- 260°C
Thermal Resistance θJA (TQFN-24) --------------------------------------------------- 45°C/W
ESD Rating
Human Body Model --------------------------------------------------------------------- 2kV
Recommend Operating Conditions (2)
Supply Voltage (VIN) ------------------------------------------------------------------ 2.5V to 5.5V
Operating Temperature Range ------------------------------------------------------- -40°C to +85°C
Note (1): Stress beyond those listed under “Absolute Maximum Ratings” may damage the device.
Note (2): The device is not guaranteed to function outside the recommended operating conditions.
Electrical Characteristics
(VVCC = 5V, Circuit of Figure 1, VAVDD = VSUP = 13V, TA = 0°C to +85°C, unless otherwise noted.
Typical values are at TA = +25°C)
PARAMETER
CONDITIONS
VCC Input Supply Range
VCC Undervoltage Lockout Threshold
VCC Shutdown Current
VCC Quiescent Current
REFERENCE
VCC rising, hysteresis(typ)=200mV
VCC = 2V
VFB = 1.3V, Not switching
VFB = 1.0V, Switching
EUP2681
MIN TYP MAX
2.5 5.5
2.05 2.25 2.45
100 200
1 1.5
45
REF Output Voltage
No external load
1.238 1.250 1.262
REF Load Regulation
REF Sink Current
0< ILOAD <50µA
In regulation
6
10
REF Undervoltage Lockout Threshold Rising edge. Hysteresis(typ)=200mV
1 1.15
OSCILLATOR and TIMING
Frequency
1000 1200 1400
Oscillator Maximum Duty Cycle
87 90 93
Duration to Trigger Fault Condition FB or FBP or FBN below threshold 47 55 65
UNIT
V
V
µA
mA
V
mV
µA
V
kHz
%
msec
DS2681 Ver1.1 Aug. 2012
5
5 Page 
Tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com
Typical Operating Characteristics (continued)
EUP2681
DS2681 Ver1.1 Aug. 2012
11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet EUP2681.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| EUP2681 | TFT LCD DC-DC Converter | Eutech Microelectronics |
| EUP2681JIR1 | TFT LCD DC-DC Converter | Eutech 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 |