CHL8214-06CRT

CHL8214-06CRT Application Field and Working Principle

The CHL8214-06CRT is an integrated synchronous buck DC-DC switchingcontrollers consisting of a MOSFET gate driver circuit and a dc controller embeddedin a single package. It is intended to be used to form an efficient, low cost synchronous buck switching regulator in low power applications (typically up to 100W).The CHL8214-06CRT is well suited for applications where lower noise, higher efficiency and precise measurements of regulated output voltage are desired, such as industrial, medical, and telecom applications.

Application Context and Uses

The CHL8214-06CRT is widely used in applications such as FPGA, ASIC, and CPU/SoC power supply, industrial power supplies, displays power supplies, backup power supplies, and mobile device power supplies. In these applications, the switching frequency and output current of the switching regulator are controlled by the controller block. The CHL8214-06CRT is ideal for high-efficiency and low-noiseswitching buck regulators due to features such as its adjustable output voltage and currentregulation, high switching frequency, an adjustable operating temperature range, anda soft start feature for a zero-voltage-transition (ZVT) start-up.

Key Features

• Adjustable output voltage (1.0V to 5.7V)
• High switching frequency (1.5 MHz – 5.5 MHz)
• High efficiency and low noise
• Adjustable operating temperature range (from -30°C to 110°C)
• High power conversion efficiency
• Soft-start feature for a zero-voltage-transition (ZVT) start-up

Working Principle

The CHL8214-06CRT operates as a synchronous buck switching regulator. Itis based on a classical Type-I buck regulator. The regulator works bycontrolling the gate of the power Mosfet and the other upper-side switch tocreate the required output voltage regulation with high efficiency.

The controller consists of a power switch MOSFET (power MOSFET) and an associated driver circuit. The buck converter configuration consists of a power MOSFET switch and a diode to create a buck converter topology.

The CHL8214-06CRT works in the following sequence: first, an input voltage is appliedto the set-up circuit that generates an enabling voltage which turns on the power MOSFET switch. When this occurs, the current quickly rises to its maximum level. When the current reaches the set-point value, the controller starts resetting the power MOSFET’s gate bybeing connected to ground, turning off the current path. At the same time, the currententers the diode, generating the output voltage. When the current reaches its minimumlevel, the gate of the power MOSFET is again turned on and the cycle starts again. Thisprocess, which continues in a cyclic manner, is called Pulse-Width Modulation (PWM).

The CHL8214-06CRT is capable of synchronization and limiting the switchingfrequency of the buck converter. The user has the ability to adjust the voltage feedback tothe control block, giving the user the ability to control the voltage output to the outputof the converter, as well as the transistor gate drive and measuring circuits. The on-chiptemperature sensor allows the user to set the maximum working temperature and providesthermal-foldback protection.

Conclusion

The CHL8214-06CRT is an ideal choice for high performance buck switching regulator solutions due to its wide range of features such as an adjustable output voltage, high switching frequency, adjustable operating temperature range, and a soft start feature. These features make the CHL8214-06CRT a leader in its class for applications where precision, efficiency, and low noise are the primary considerations.