at1731 ETC-unknow, at1731 Datasheet

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at1731

Manufacturer Part Number
at1731
Description
2-channel Pwm Controller For Lcd Bias
Manufacturer
ETC-unknow
Datasheet
Features
• Low input voltage: 2.5V to 7V
• 2-Channels PWM Control:
• Adjustable Soft start time and maximum duty
• Built-in timer latch for short circuit protection:
• Built-in under-voltage lockout, thermal
• High operating frequency: 100kHz to 1MHz
Applications
• LCD Displays Bias
• Power Supply for general equipment
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
Fax: 886-3-563-0879
Block Diagram
1 Boost Controller(CH1)
1 Inverting Controller (CH2)
cycle
Delay time=2 16 /(Switching frequency)
shutdown.
2-Channel PWM Controller for LCD Bias
1
General Description
The AT1731 is a PWM DC/DC converter control
IC with 2 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).
WWW:
Email:
http://www.aimtron.com.tw
service@aimtron.com.tw
AT1731
Preliminary

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at1731 Summary of contents

Page 1

... Tel: 886-3-563-0878 Fax: 886-3-563-0879 2-Channel PWM Controller for LCD Bias General Description The AT1731 is a PWM DC/DC converter control IC with 2 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 ...

Page 2

... CH1 output for Nch- OUT1 MOSFET 10 CH2 output for Pch- OUT2 MOSFET 11 Don’t connect NC 12 Power Supply VCC REG 13 Regulated voltage output CT 14 Oscillator capacitor CS2 15 Sotf-start for CH2 CS1 16 Soft-star for CH1 WWW: http://www.aimtron.com.tw Email: service@aimtron.com.tw 2 AT1731 Preliminary Descript timing ...

Page 3

... TSSOP16°T a =+25:± — -30 — - — -40 — - Symbol Min. Typ 100 500 OSC T -30 +25 OP WWW: http://www.aimtron.com.tw Email: 3 AT1731 Preliminary Unit Max - 6.5 V 500 +125 C 0 +150 C 0 +300 C 0 (Ta=+25 C) Values Unit Max. ...

Page 4

... =150pF 480 fosc T C =150pF T C =150pF T Vcc=2. =-30: to +85: C =0.1ôF V 2.16 2.20 2.24 O REG Vcc=2. =-30: to +85: I -40 REG I CS1_2 WWW: http://www.aimtron.com.tw Email: service@aimtron.com.tw 4 AT1731 Preliminary Values Unit -- 7 0.5 1.5 % 3.0 3 ôA -80 2.5 3 2.0 MHz 1 ...

Page 5

... OUT1-GND C =1000pF between VCC-OUT2 I =-150mA OUT1 R 2.5 1AH I =150mA OUT1 R 2.5 1AL I =-150mA OUT2 R 2.5 2AH I =150mA OUT2 R 2.5 2AL WWW: http://www.aimtron.com.tw Email: service@aimtron.com.tw 5 AT1731 Preliminary 1 0.3 V 1.32. V 1. 119 137 ms 0 140 4.0 5 ...

Page 6

... Typical Application Circuit 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 Fax: 886-3-563-0879 2-Channel PWM Controller for LCD Bias WWW: http://www.aimtron.com.tw Email: service@aimtron.com.tw 6 AT1731 Preliminary ...

Page 7

... MAX MIN TYP 1.10 1.20 0.041 0.043 0.10 0.15 0.002 0.004 1.00 1.05 - 0.039 0.25 0.28 0.008 0.010 0.127 - - 0.005 5.075 5.10 0.193 0.1998 6.40 6.60 0.244 0.252 4.40 4.50 0.170 0.173 0.60 0.70 0.020 0.024 0. 0.026 - 0.076 - - 8q 0q WWW: http://www.aimtron.com.tw Email: 7 AT1731 Preliminary MAX 0.047 0.006 0.041 0.011 - 0.200 0.260 0.177 0.028 - 0.003 8q service@aimtron.com.tw ...

Page 8

... Pkg. Thickness <2.5mm Pkg. Thickness <2.5mm and Pkg. Volume t350 mm 3 Pkg. Volume <350 mm 3 Convection 235~240 VPR 235~240 IR/Convection 235~240 WWW: http://www.aimtron.com.tw Email: 8 AT1731 Preliminary VPR 10qC/second max. 60 seconds 219~225qC or 235~240qC 10qC/second max. and qÖ qÖ qÖ service@aimtron.com.tw ...

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