|
|
PDF ADD8733 Data sheet ( Hoja de datos )
| Número de pieza | ADD8733 | |
| Descripción | Integrated TFT Panel Power Supply | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de ADD8733 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
|
No Preview Available !
Preliminary Technical Data
Integrated TFT Panel Power Supply
with Gate Modulation and VCOM
ADD8733
FEATURES
Step-up switching regulator with 3 A switch current limit
8 V to 16.5 V input voltage range
Adjustable output voltage up to 20 V
1.2 A series switch for power sequencing
Overvoltage protection (OVP)
Step-down switching regulator with 3 A switch current limit
www.DataSheet4U8.Vcotmo 16.5 V input voltage range
Adjustable output voltage down to 2.5 V
Gate pulse modulator circuitry
Independently adjustable delay and falling slope
Positive charge-pump regulator for VGH
Negative charge-pump regulator for VGL
Two VCOM amplifiers
General
Power supply sequencing
Thermal fault protection
650 kHz or 1.2 MHz PWM frequency
Soft start
Undervoltage lockout (UVLO)
48-lead RoHS compliant LFCSP
APPLICATIONS
TFT LCD panels for TVs and monitors
BLOCK DIAGRAM
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
ADD8733
STEP-UP SWITCHING REGULATOR
AND POWER SEQUENCING
STEP-DOWN SWITCHING REGULATOR
TWO VCOM AMPLIFIERS
GATE PULSE
MODULATION
X
VGH
REGULATOR
VGL
REGULATOR
X
X
UNDERVOLTAGE
X
X LOCKOUT AND
X THERMAL PROTECTION
X
CONTROL
X
Figure 1.
GENERAL DESCRIPTION
The ADD8733 is a 4-channel regulator with two VCOM
amplifiers and gate pulse modulation (GPM) that provides
all the necessary voltages for thin film transistor (TFT) liquid
crystal displays (LCD). Included is a step-up regulator, a step-
down regulator for digital logic, two VCOM amplifiers, two
charge-pump regulators for VGH and VGL, and an integrated
gate pulse modulator.
By offering a complete power integration solution optimized for
TFT LCD TVs and monitors, the ADD8733 helps to lower cost,
simplify board design, and increase performance over existing
solutions.
The ADD8733 is offered in a 48-lead RoHS compliant LFCSP
and is specified over the industrial temperature range of −40°C
to +85°C.
Rev. PrA
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2007 Analog Devices, Inc. All rights reserved.
1 page  
Preliminary Technical Data
POSITIVE CHARGE-PUMP REGULATOR SPECIFICATIONS
VNPCP_SUP = 12 V, TA = 25°C, fOSC = 650 kHz, unless otherwise noted.
Table 3.
Parameter
SUPPLY
Supply Voltage
OUTPUT
Output Current
REFERENCE
FB Regulation Voltage
Symbol
VNPCP_SUP
IVGH
VNPCP_FB
Min
8
www.DataSheet4U.com
NEGATIVE CHARGE-PUMP REGULATOR SPECIFICATIONS
VNPCP_SUP = 12 V, TA = 25°C, fOSC = 650 kHz, unless otherwise noted.
Table 4.
Parameter
SUPPLY
Supply Voltage
OUTPUT
Output Voltage
Output Current
REFERENCE
Reference Voltage
FB Regulation Voltage
Symbol
VNPCP_SUP
VGL
IVGL
VNCP_REF
VNCP_FB
Min
8
(−VNPCP_SUP + 3)
Typ
50
2.5
Typ
70
2.5
0
ADD8733
Max Unit
20 V
mA
V
Max
20
−2
Unit
V
V
mA
V
V
GATE PULSE MODULATOR SPECIFICATIONS
VSD_VIN = 12 V, VGPM_H = 28 V, VGPM_L = 12 V1, TA = 25°C, unless otherwise noted.
Table 5.
Parameter
INPUT CHARACTERISTICS
GPM_H Voltage
GPM_H Input Current
GPM_L Voltage
GPM_L Input Current
CONTROL INPUT CHARACTERISTICS
GPM_FLK Voltage Low
GPM_FLK Voltage High
GPM_FLK Input Current
GPM_DPM Voltage Low
GPM_DPM Voltage High
GPM_DPM Input Current
SWITCHING CHARACTERISTICS
GPM_OUT Discharge Current
DELAY CHARACTERISTICS
Delay Time
Symbol Conditions
VGPM__H
IGPM__H
VGPM_L
IGPM_L
GPM_FLK = GND, GPM_DPM = logic high
GPM_FLK = GPM_DPM = logic high
VLOWFLK
VHIGHFLK
IGPM_FLK
VLOWDPM
VHIGHDPM
IGPM_DPM
0.9 V ≤ GPM_FLK ≤ 3.3 V
0.9 V ≤ VGPM_DPM ≤ 3.3 V
IGPM_OUT RE = 400 Ω , GPM_L = 12 V
tDELAY
CE = 470 pF
1 Refer to Figure 6 in the Typical Application Circuit section.
Min
GPM_L + 6
5
2.2
−1
2.2
−1
Typ Max
30
TBD
GPM_H – 6
TBD
0.8
+1
0.8
+1
30
TBD
Unit
V
μs
V
μs
V
V
μA
V
V
μA
mA
μs
Rev. PrA | Page 5 of 16
5 Page 
Preliminary Technical Data
SU_EN
SD_EN
SU_OUT
SD_OUT, VGL
GPM_OUT
SU_DLY
VGL_DLY
SU_OUT
SD_OUT
VGL
www.DataSheet4U.com
GPM_DPM
GPM_FLK
Figure 4. Timing Diagram for Power-Up Sequence 1
SU_EN
SD_EN
SU_OUT
STEP_DN, VGL
GPM_OUT
SU_DLY
VGL_DLY
SU_OUT
STEP_DN
VGL
GPM_DPM
GPM_FLK
Figure 5. Timing Diagram for Power-Up Sequence 2
(HIGH)
ADD8733
Rev. PrA | Page 11 of 16
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet ADD8733.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| ADD8733 | Integrated TFT Panel Power Supply | Analog Devices |
| 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 |