AT1729
Preliminary
3-Channel PWM Controller for LCD Bias 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).
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
...