AS3843 Overview
The AS3842 family of control ICs provide pin-for-pin replacement of the industry standard UC3842 series of devices. The devices are redesigned to provide significantly improved tolerances in power supply manufacturing. The 2.5 V reference has been trimmed to 1.0% tolerance.
AS3843 Key Features
- 2.5 V bandgap reference trimmed to 1.0% and temperature-pensated
- Standard temperature range extended to 105¡C
- AS3842/3 oscillations trimmed for precision duty cycle clamp
- AS3844/5 have exact 50% max duty cycle clamp
- Advanced oscillator design simplifies synchronization
- Improved specs on UVLO and hysteresis provide more predictable
- Improved 5 V regulator provides better AC noise immunity
- Guaranteed performance with current sense pulled below ground
