SG1525AJ

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The SG1525AJ is a DC/DC switching controller integrated circuit manufactured by Sanken Electric Co., Ltd. It is categorized as a PMIC (Power Management IC) Voltage Regulator, and is specified as a DC – DC Switching Controller.

The SG1525AJ is typically used as a central controlling element in various types of power supplies such as AC adapters, switching power supplies, LED lighting, DC-ATX power supplies, portable devices, and other applications where a regulated supply of DC power is required.

The SG1525AJ features a wide operating range of 4.5 to 25VDC input, 2 to 6VDC output, and provides an adjustable frequency of operation (25kHz to 500kHz). It is also a highly efficient IC, providing low power consumption and a high efficiency rate of more than 90%. It also includes a soft-start circuit to minimize inrush current and reduce startup stress.

In terms of its external components, the SG1525AJ requires only a few external components, such as an oscillator inductor, a voltage divider for freq. and voltage adjust, a current sense resistor for current limit, a feedback resistor for output voltage adjustment, and a start resistor for soft-start.

Talking about its general operation, the SG1525AJ features an internal pulse width modulator (PWM) which controls the duty cycle (On-time) of the output voltage of the switching converter. Its wide ranging frequency of operation, including a frequency-sync pin, makes it very flexible to designs and overhead cost.

Moreover, the SG1525AJ also features a fold-back current limit circuit, which protects the IC and external components from overcurrent and power surge conditions. The current outputs of the SG1525AJ are also very precise and stable, making it suitable for critical applications.

To summarize, the SG1525AJ is a highly efficient and reliable DC-DC switching controller IC, specifically designed for a wide range of AC-DC, DC-DC, and LED lighting applications. It offers a wide range of operating frequencies, adjustable control signals for specified ramp times, current limit, and a soft-start circuit for improved system stability. Moreover, it requires minimal external components and offers long-term reliability and stability in demanding applications.

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