ISL6268CAZ

The ISL6268CAZ is a highly integrated switched-mode power supply (SMPS) controller optimized for off-line conversion applications. This device integrates a low-power variable frequency current-mode PWM controller, a power MOSFET driver and an accuracy current sense amplifier. This integrated circuit is designed to provide excellent line and load transient performance with a minimum parts count.

ISL6268CAZ application field and working principle is mainly used in computer peripherals such as printers and multi-function printers, hard disks, power adapters and other peripheral devices, plus its simple drive and control circuit, suitable for low-cost end products.

The working principle of the ISL6268CAZ is to convert the input power supply (Vin) to a stable output voltage (Vout) by controlling the switch\'s on/off time. The ISL6268CAZ has an integrated PWM controller, power MOSFET driver and accuracy current sense amplifier, and uses Pulse Width Modulation (PWM) to detect the voltage and output current sense signal, and adjust the conduction time of the switch. The integrated synchronous rectifier control can reduce the conduction loss of the freewheeling diode in the circuit, improve conversion efficiency and reduce the cost of the design.

The characteristics of the ISL6268CAZ include programmable switching frequency from 250kHz to 500kHz, low start-up current, programmable operating frequency and temperature protection circuit. This device also features an auto-restart protection, allowing the device to intelligently control power-down, resume and restart cycle when any fault occurs in the circuit.

In addition, the ISL6268CAZ has a unique input voltage feed forward structure that can quickly detect the input voltage and output current sense signal. The output current sensing device is integrated with a high level of accuracy, allowing the output current to be precisely controlled. With a small number of external components, the ISL6268CAZ is suitable for application in a superior electrical and thermal performance DC-DC converter.

In summary, the ISL6268CAZ is suitable for modern computer peripheral products, mainly for the switching power supply of small and low-cost end products. Its quick response and excellent performance make it an ideal choice for modern applications and it is widely used indc-dcconverters, such as adapters, notebooks, etc.