L6726ATR

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The L6726ATR is a step-down, pulse-width modulated (PWM) switching controller used in a variety of power management applications. The L6726ATR is part of STMicroelectronics\' L6726A family of integrated power management ICs designed to offer high-efficiency design flexibility, protection, and operating temperature range while also saving valuable space.

The L6726ATR is designed to operate in both continuous conduction mode (CCM) and discontinuous conduction mode (DCM), allowing designers more flexibility. It also features protection features such as over temperature protection, power loss protection, under voltage protection, and over voltage protection. The L6726ATR is also designed for operation over a wide temperature range.

Features

• Step down PWM switching controller in CCM and DCM
• High efficiency
• Support 8 kHz to 550 kHz switching frequencies
• Integrated protection features
• Wide operating temperature range –40°C to +125°C
• Low quiescent current

Applications

• Point of load Conversion
• DC/DC converters for isolated and non-isolated configurations
• Stepper Motor Driving
• AC/DC Adaptors
• VoIP/Telecom rectifiers
• Battery Chargers

Working Principle

The working principle of the L6726ATR is to maintain a stable output voltage from an input voltage. It works by controlling the switching of a power MOSFET switch which generates a pulse width modulated (PWM) output. The PWM is used to adjust the output voltage to the desired level. The feedback of the output voltage is used to control the conduction of the power switch and maintain the stability of the output voltage.

The L6726ATR is designed to operate in two modes: continuous conduction mode (CCM) and discontinuous conduction mode (DCM). In CCM, the power switch is always turned on, while in DCM, the power switch only turns on when the feedback voltage reaches the lower threshold of the output voltage. This low voltage and current threshold of the output voltage allows the L6726ATR to behave differently than in CCM, providing greater efficiency and smaller size.

The L6726ATR is also designed for operation over a wide temperature range, from -40°C to +125°C. It also features protection features such as over temperature protection, power loss protection, under voltage protection, and over voltage protection. This allows the L6726ATR to protect the circuit from unexpected power fluctuations, as well as allow for more efficient operation.

Conclusion

The L6726ATR is a chip that is designed to offer high-efficiency design flexibility, protection, and a wide operating temperature range, all while saving valuable board space. The L6726ATR works by controlling the switching of a power MOSFET, generating a pulse width modulated (PWM) output, and using the feedback to maintain stability. It also supports 8 kHz to 550 khz switching frequencies, and features integrated protection features, making it suitable for a variety of power management applications.

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