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PDF DT8211 Data sheet ( Hoja de datos )
| Número de pieza | DT8211 | |
| Descripción | LCD Back Light Inverter Drive IC | |
| Fabricantes | DMB Technology | |
| Logotipo |  |
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DMB Technology
DT8211
LCD Back Light Inverter Drive IC
DT8211
LCD Back Light Inverter Drive IC
Rev1.1 – 11 July 2008
1. General description
2. Features
The DT8211 is a LCD backlight inverter controller for driving CCFL (Cold Cathode
Fluorescent Lamp). It drives a half bridge topology symmetrically and provides a
near sinusoidal current waveform. It operates at a single-stage topology, constant
frequency PWM (Pulse Width Modulation) mode. The MaxDuty technique achieves
the maximum duty ratio of about 48% and hence can provide better efficiency. A
typical operating frequency ranges from 30kHz to 300kHz, depending on the CCFL
and transformer characteristics. Features such as OLP (Open Lamp Protection) and
SCP (Short Circuit Protection) functions are included. It is available in 18-pin SOPW.
n High Efficiency Single Stage Power Conversion
n P- and N-channel MOSFET Driver Included
n Wide Input Supply Voltage Range from 7.5V to 45V
n Maximum Duty ratio of 48%
n Extremely Low Number of External Components
n Extremely Small Size of Board
n Constant Frequency PWM Operation
n High Precision Oscillator
n Analog and Burst Dimming Function Simultaneously
n Analog Dimming Polarity Selectable
n Burst Dimming Polarity Selectable
n Open Lamp Protection Circuit Included
n Output Short Circuit Protection Circuit Included
n 18 Pin SOPW
3. Applications
n LCD Backlight Inverter
n EEFL Inverter
n FFL Inverter
n Advertisement Board
Rev1.1– 11 July 2008
© 2007 DMB Tech. All Rights Reserved
1 of 10
1 page  
DMB Technology
DT8211
LCD Back Light Inverter Drive IC
8. Electrical characteristics
TA = 25°C, VCC = 15V, unless otherwise specified
Parameter
Main oscillator section
RT Voltage
CT Oscillation Frequency
Main Oscillation Frequency
Triangular High Voltage
Triangular Low Voltage
Burst oscillator section
Burst Oscillation Frequency
Triangular High Voltage
Triangular Low Voltage
Dimming section
ADIM Input Impedance
BDIM Input Impedance
ADIM Int. Bias Voltage
BDIM Int. Bias Voltage
Protection section
Init. PROT Discharging I.
PROT Charging Current
PROT Threshold Voltage
IFB Open Lamp Detect V.
ICMP Striking Mode V.
General
Enable On Voltage
Enable Off Voltage
Quiescent Current
Maximum Oscillation Duty
Output section
P-CH Output High Voltage
P-CH Output Low Voltage
N-CH Output High Voltage
N-CH Output Low Voltage
Symbol
VRT
FCT
FMAIN
VHM
VLM
FoscB
VHB
VLB
RADIM
RBDIM
VADIM,B
VBDIM,B
IPROT,INI
IPROT,CG
VPROT
VOLP,IFB
VSTK,ICMP
VEN,ON
VEN,OFF
ICC
DMAX
VPOH
VPOL
VNOH
VNOL
Conditions
when RT>20kΩ
when RT>20kΩ
when IFB<0.75V
ISINK=200μA
ISOURCE=200μA
ISINK=200μA
ISOURCE=200μA
Min Typ Max Unit
1.96 2.0
97 100
48.5 50
2.8 3.0
1.0 1.2
2.04 V
103 kHz
51.5 kHz
3.2 V
1.4 V
291 300 309 Hz
1.9 2.0 2.1 V
0.7 0.8 0.9 V
80 100 120 KΩ
80 100 120 KΩ
2.4 2.5 2.6 V
2.4 2.5 2.6 V
3 mA
0.35 0.5
0.65 μA
2.8 3.0 3.2 V
0.65 0.75 0.85 V
3.2 3.5 3.8 V
2.0 V
0.8 V
7.0 mA
48 %
VCC - 0.5
VCC - 14
10.0
0
VCC - 0.1
VCC - 12
12.0
0.1
VCC
VCC - 10
14.0
0.5
V
V
V
V
Rev1.1– 11 July 2008
© 2007 DMB Tech. All Rights Reserved
5 of 10
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet DT8211.PDF ] | |
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