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PDF AT1729 Data sheet ( Hoja de datos )
| Número de pieza | AT1729 | |
| Descripción | 3-Channel PWM Controller for LCD Bias | |
| Fabricantes | ETC | |
| Logotipo |  |
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AT1729
Preliminary
3-Channel PWM Controller for LCD Bias
Features
• Low input voltage: 2.5V to 7V
• 3-Channels PWM Control:
2 Boost Controller(CH1,CH2)
1 Inverting Controller (CH3)
• Adjustable Soft start time and maximum duty
cycle
• Built-in timer latch for short circuit protection:
Delay time=216/(Switching frequency)
• Built-in under-voltage lockout, thermal
shutdown.
• High operating frequency: 100kHz to 1MHz
General Description
The AT1729 is a PWM DC/DC converter control
IC with 3 channel outputs that can directly drive
power MOSFET. This IC ia suitable for very small
DC/DC converters because of their small and thin
package(1.1 mm max.), and high operation
frequency (up to 1.0 MHz).
Applications
• LCD Displays Bias
• Power Supply for general equipment
Block Diagram
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: [email protected]
1
1 page  
AT1729
Preliminary
3-Channel PWM Controller for LCD Bias
Charge Current of
CS1_2(Source)
Charge Current of
CS3(Sink)
Soft-Start and Duty Max. Duty of CH1,2
Section
Max. Duty of CH3
Invalid TL threshold
voltage of CS1_2
Invalid TL threshold
voltage of CS3
Threshold Voltage of
FB1,2
Timer Latch Section Threshold Voltage of
(TL) FB3
Start up count
Start up time
Thermal Shuntdown
Section
Threshold Temperature
Output Section
Rise time of OUT1,2
Rise time of OUT3
Fall time of OUT1,2
Fall time of OUT3
High Level on
Resistance of OUT1,2
Low Level on
Resistance of OUT1,2
High Level on
Resistance of OUT3
Low Level on
Resistance of OUT3
ICS1_2
ICS3
fOSC=500KHz
fOSC=500KHz
-1.0
1.0
80 87 90
80 86 90
0.3
1.32.
VTLTH1 2
1.32
VTLTH3
Count
TTL
0.3
216
105 119 137
TOH 140
tr1_2
CO =1000pF between
OUT1,2-GND
20
25
35
tr3
CO =1000pF between
VCC-OUT3
20
25
35
tf1_2
CO =1000pF between
OUT1,2-GND
20
25
35
tf3
CO =1000pF between
VCC-OUT3
20
25
35
R1_2AH IOUT1_2=-150mA
2.5 4.0 5.5
R1_2AL IOUT1_2=150mA
2.5 4.0 5.5
R3AH IOUT3=-150mA
2.5 4.0 5.5
R3AL IOUT1_2=150mA
2.5 4.0 5.5
mA
mA
%
%
V
V
V
V
ms
0C
ns
ns
ns
ns
Ω
Ω
Ω
Ω
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: [email protected]
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet AT1729.PDF ] | |
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