ISU0305D15

Application Field and Working Principle of ISU0305D15

The ISU0305D15 is a type of DC DC converter (buck converter), which can convert input DC voltage to a pre-set DC voltage independent of the load current.

Application Field

The ISU0305D15 buck converter offers a wide range of input voltages up to 6V and output voltages between 2.7V and 5.4V. The adjustable current limit of 2.5A or 6A allows different output power levels. It offers high efficiency of up to 93.3%, excellent line and load regulation, and good thermal performance over a wide range of load and operating conditions. The inherent short circuit protection, current limit and thermal protection make it an ideal choice for applications such as Distributed Power Systems, Telecom Infrastructure, Energy Storage Systems, Automotive, Industrial Motor Drives, and High-Density Computing.

Working Principle

The working principle of ISU0305D15 is a buck converter. In this converter, an internal high-side switch is connected to the input voltage, while the output voltage is controlled by a low-side switch. The low-side switch is controlled by a pulse width modulated (PWM) signal. The input voltage, output voltage and duty cycle of the PWM signal determine the voltage conversion. When the low side switch is on, the energy stored in the magnetic element is delivered to the output, and when it is off, the energy stored in the capacitor is accumulated in the newly generated magnetic element.

The PWM unit, which is the main building block of the buck converter, also enables the self-protection features with an integration of analog control and digital control. The current limit is set by an analog signal and the over voltage protection (OVP) is triggered by digital logic when the output voltage is over the set threshold. The thermal protection (TSP) monitors the junction temperature and triggers the PWM logic to reduce the duty cycle when the junction temperature is over the set threshold.

Conclusion

The ISU0305D15 buck converter is an advanced, high-efficiency DC to DC converter suitable for a wide range of applications. It offers excellent performance with adjustable current limit, high efficiency, excellent line and load regulation, and good thermal performance. The self-protection features with analog control and digital control make it a reliable choice for industrial applications.