LTC4121EUD#TRPBF

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The LTC4121EUD#TRPBF is a highly integrated, wide input voltage range synchronous buck-boost battery charger. One of the key components of PMIC – Battery Chargers, the device is a monolithic solution that can operate with input voltages spanning the range from low battery voltages to high voltage (line) inputs. As a result, the device permits an increase or decrease in output voltage compared to input voltage. This makes it an ideal choice for applications like portable product powering and charging.

The LTC4121 device operates in a Bi-directional buck-boost mode, efficiently delivering power to the system in either boost or buck modes. In boost mode, the device increases the output voltage to greater than the input voltage while in buck mode, the output voltage is reduced to a level lower than the input voltage.

The LTC4121EUD#TRPBF device utilizes a synchronous buck-boost topology with a 4th order loop and hysteretic control to accurately regulate the output voltage without need for an inductor. However, when used in combination with an external inductor, the device provides a more energy efficient efficient design. The inherent design of the device achieves low output ripple, no audible noise, and efficient current conversion with ease.

The LTC4121EUD#TRPBF device is a highly integrated solution which includes a number of features. The integrated feedback loop facilitates synchronous conversion, while cycle-by-cycle current limit, overvoltage protection, thermal protection and short-circuit protection are enabled to protect the system against fault conditions. The device also has an asynchronous (~SR) input which allows external control of the device. The device can be easily configured with a simple resistive divider and is programmable with an external resistor.

The operating frequency and loop compensation can be adjusted through external resistors and capacitors. The LTC4121EUD#TRPBF contains an enable pin that supports timing of enable and disable functions. The device can be programmed to automatically resume the charge cycle when the charge current has dropped below a specific level.

The LTC4121EUD#TRPBF device provides excellent power conversion, minimizing power loss and enabling the system to deliver the desired output voltage in a wide range of conditions. This high performance makes the device suitable for a wide range of battery charging systems, including portable product powering and charging.

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