NCP4353ASNT1G

Enter the world of secondary side SMPS controllers, where the NCP4353 and NCP4354 reign supreme, tailored for applications characterized by an unyielding demand for minimal no-load power consumption. Their innate ability to discern 'no load' situations and seamlessly transition into a low-consumption OFF mode sets them apart. During this mode, the primary side controller takes a backseat, allowing energy to be sourced from output capacitors, effectively nullifying the power required for regulation upkeep. Noteworthy during OFF mode is the controlled relaxation of the output voltage, adjustable to specific levels. Upon demand resurgence, the NCP4353 or NCP4354 seamlessly reactivates the primary side controller, ensuring continuous power supply. In standard operation, these controllers offer integrated voltage feedback regulation, eliminating the need for a shunt regulator. The A versions elevate functionality by integrating a current regulation loop alongside voltage regulation. Simplifying setup, both feedback control and ON/OFF signal transmission can be achieved with a single optocoupler. Highlighting the NCP4354 is its incorporation of a LED driver pin, employing an open drain MOSFET driven by a 1 kHz square wave with a 12.5% duty cycle for indication purposes. Available in SOIC-8 and TSOP-6 packages for NCP4354 and NCP4353 respectively, these controllers embody efficiency and versatility in power management

Key Features

• Supply Current <100 uA
• Constant current and constant voltage regulation (A version)
• +-1% reference voltage accuracy over temperature