UC3827DW-1G4

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UC3827DW-1G4 is an integrated circuit that functions as an up-and-down-and-internal-voltage-stabilizer device. It is a member of the PMIC—Voltage Regulators—DC DC Switching Controllers category. Although this IC is intended for low power applications, it can also integrate high power components. This IC provides up to 4 switching channels that can be used for applications such as switching LEDs, motor drive, power circuit, and power management.

In addition to the four switching channels, the UC3827DW-1G4 chip already contains a voltage regulator, allowing it to control the supply voltage to the circuits it is driving, making it more versatile than a traditional voltage regulator. Additionally, the IC can provide current limit protection and thermal shutdown protection, ensuring the circuit remains safe and stable when faced with high loads or other abnormal situations.

At the heart of the UC3827DW-1G4, is 20-pin integrated circuits, which comprises of two sections, one operating on 4V to 12V input voltage range, and the other operating with 5V to 30V input voltage range. It is configured with two on-chip high-side drivers, two on-chip high-side capacitive drives, and two on-chip low-side drivers. The high-side drives have a maximum output current of 3A at 25℃, while the on-chip high-side capacitive and low-side drivers have a maximum output current of 150mA. The signals for the on-chip high-side and low-side drivers are derived from a pulse-width modulated (PWM) signal coming from the gate terminal, which can be used to generate a pulse with width varying from 0 to 10μs, with a frequency from 1kHz to 20kHz.

Furthermore, the UC3827DW-1G4 has an adjustable current limit function that can be set to the desired output current. This is set via two external resistors connected between the chip’s sense/control pins (pins 7/9) and ground. As the sensed current increases, the output voltage decreases. This provides an effective way of limiting the output current and avoid damages that can arise due to excessive current.

In its working state, the UC3827DW-1G4 functions as a DC current controller that responds to a pulse-width modulated (PWM) input signal. When enabled, the IC provides a stable and regulated output voltage across its three outputs, which can be used for direct current applications. It is important to note that the UC3827DW-1G4 can be used together with other components in a power-control circuit, such as a buck regulator.

The various features and characteristics of this PMIC—Voltage Regulators—DC DC Switching Controllers make it suitable for applications like motor-control, LED lighting, power-supply control, home appliance switch control, DC power conversion and more. Its stable and reliable output helps to ensure a robust system performance.

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