I Laj494p Schematic Better -

Use of the internal 5V reference (Pin 14) to bias the error amplifiers rather than the raw input voltage.

A 0.1µF ceramic capacitor placed as close to Pin 12 ( VCCcap V sub cap C cap C end-sub ) and Pin 7 (Ground) as possible. i laj494p schematic better

The best schematics for this application focus on Frequency Tuning . By choosing specific values for the timing capacitor ( CTcap C sub cap T at Pin 5) and resistor ( RTcap R sub cap T Use of the internal 5V reference (Pin 14)

Schematics that include RC compensation networks between the error amplifier outputs (Pin 3) and their inputs provide much smoother transitions and prevent the "whine" or oscillation often heard in cheap power converters. 3. Enhanced Drive Circuitry By choosing specific values for the timing capacitor

Look for designs that utilize the Dead-Time Control pin to implement a basic form of Maximum Power Point Tracking (MPPT) or over-voltage protection. Technical Checklist for a Superior IL494P Layout