PQ1CG41H2FZH

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DC DC Switching Regulators

The PQ1CG41H2FZH is a DC/DC switching regulator that is used in applications requiring low noise power supply solutions. It features a wide wide input voltage range of 8V to 36V and is capable of supplying up to 1A of output current. It also offers a variety of features such as built-in soft start, user adjustable regulation voltage, adjustable output current limit, frequency foldback current limit and over temperature protection.

Working Principle

The PQ1CG41H2FZH draws power from its input voltage source and steps it down to the requisite output voltage and current. It employes a switching regulator topology using a power switch integrated into the part. This switch structurally consists of an internal MOSFET transistor. The switching regulator evaluates the output voltage, then turns the switch on to a fixed duty cycle and repeats this process as long as there is a requirement for output voltage.

The PQ1CG41H2FZH isdriven by an internal oscillator. The switching frequency is set internally and cannot be externally adjusted. This switching regulator can be synchronised to an external clock, allowing external control over the shape of the switching waveform.

Depending on user settings and the load applied, the operating frequency of the PQ1CG41H2FZH is automatically adjusted down to reduce power consumption, noise, and EMI generation. The part also features a user-selectable fixed Frequency mode, eliminating sudden reduction of switching frequency, thus allowing the user to select a compromised solution in terms of noise and efficiency.

Application Field

The PQ1CG41H2FZH is suitable for upto 1A output current applications. It is well suited for use in computers, telecommunications, business equipments and consumer electronics. In particular, it is suitable for use in products such as monitors, ATMs, vending machines, keyboards, and other applications where a vibrant display is necessary.

The PQ1CG41H2FZH is also suitable for industrial applications such as instrumentation, industrial controls, automotive, transportation, industrial power supplies, telecom systems and medical equipment. The extremely high accuracy of output voltage control, low noise operation, and high efficiency make this part suitable for use in any application with stringent noise and load regulation requirements.

The PQ1CG41H2FZH is also ideal for backlighting in displays and LED lighting due to its high efficiency profile and ability to provide the current ranges required by these systems. Additionally, the PQ1CG41H2FZH provides a high level of protection against over voltage and short circuit, so can be used in applications with stringent safety requirements.

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