AT1731
Preliminary
2-Channel PWM Controller for LCD Bias

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: service@aimtron.com.tw
1
Features
• Low input voltage: 2.5V to 7V
• 2-Channels PWM Control:
1 Boost Controller(CH1)
1 Inverting Controller (CH2)
• Adjustable Soft start time and maximum duty
cycle
• Built-in timer latch for short circuit protection:
Delay time=2
16
/(Switching frequency)
• Built-in under-voltage lockout, thermal
shutdown.
• High operating frequency: 100kHz to 1MHz
Applications
• LCD Displays Bias
• Power Supply for general equipment
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).
Block Diagram