CS8151YTHA7G

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CS8151YTHA7G Application Field and Working Principle

The CS8151YTHA7G is a three-terminal non-synchronous step up voltage regulator that has been designed to drive up to five white LEDs with a constant current. It is a low-voltage, non-synchronous boost converter that features over temperature protection (OTP) and a voltage limitation function. This device is classified as a linear voltage regulator and its application field is designed for LED applications.

Features

• Step up voltage of 1.25V to 22V
• Output current up to 500mA
• Over temperature protection (OTP)
• Voltage limitation function

Mechanism

The CS8151YTHA7G is a low-voltage non-synchronous boost converter. It consists of a driver, a MOSFET switch, a bypass diode, a feedback circuit and other components. The following is a synopsis of the operation of the CS8151YTHA7G linear voltage regulator:

1. When the device is initially turned on, the MOSFET switch is closed.
2. The bypass diode is used to bypass the current during the off times of the MOSFET switch.
3. An external resistor is connected between the Adjust/Feedback pin and the output pin, so that the output voltage is always fixed.
4. A feedback circuit regulates the output voltage by controlling the duty cycle of the MOSFET switch to maintain a constant voltage on the output.
5. The current is regulated by the OTP circuit, which senses the power-dissipation and shuts off the MOSFET switch when the temperature limits are exceeded.
6. When the temperature returns to normal, the OTP will reset and enable the MOSFET switch again.

Application

The CS8151YTHA7G is ideally suited for driving up to five white LEDs with a constant current. Its features and design specifications make it suitable for driving high-brightness and ultra-bright LEDs. Its simple and compact design allows for it to be used as a direct replacement for traditional linear current sources, such as LM317 and LM321.

The CS8151YTHA7G is also available as a Component Packaged Device (CPD). CPD is an ideal way to provide enhanced protection against environmental conditions, moisture and heat. CPD is also suited for surface mount designs, making the CS8151YTHA7G the perfect choice for LED lighting applications that require a compact design and enhanced performance.

Conclusion

CS8151YTHA7G is an optimal solution for driving up to five white LEDs with a constant current. It features over temperature protection (OTP) and a voltage limitation function. With its compact size, the CS8151YTHA7G is suitable for use in small enclosed and portable device applications, as well as other lighting applications that require a linear voltage regulator.

This device classification belongs under PMIC - Voltage Regulators - Linear and offers many design benefits for LED applications.

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