LTC4353CDE#PBF

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PMIC - OR Controllers, Ideal Diodes is a family of semiconductor integrated circuit (IC) composed of a diode and an ideal diode controller, used to build power management systems. The LTC4353CDE#PBF is a Programmable Linear Transistor-OR Controller, perfect for applications requiring accurate, programmable current sources or current sinks. It operates as an ideal semiconductor switch, providing a magnified current flow and smoother control than the traditional transistor-or approach.

The LTC4353CDE#PBF can be programmed to a current range of 0.5 to 5A, with a programmable current resolution up to 10mA. It features a PWM (pulse width modulation) control interface, allowing it to configure the average current level with a precision of 5%. The PWM control signal has data and clock lines, as well as an enable line, allowing the controller to be easily connected to external controllers. Additionally, the LTC4353CDE#PBF also includes a programmable current limit, providing an adjustable current protection mode, high current accuracy and thermal protection.

The LTC4353CDE#PBF has a wide range of applications in power management. It can be used for DC/DC and AC/DC power supply regulation, battery charging and discharging, LED strip lighting, LED backlighting and LED dimming, automotive electronics and industrial microcontroller applications.

The working principle of the LTC4353CDE#PBF is to sense the current from the PWM control input and generate a corresponding gated binary control voltage. This voltage is applied between the source and drain terminals of a NMOS, controlling the current source better than a single N-channel MOSFET. The resulting output characteristics are ideally suited for low input voltage regulation, and greater accuracy and stability than other types of control.

The current-sense resistor forms a precision voltage drop with respect to the controlled current and the gate-source voltage of the NMOS. This voltage drop is then converted to a digital signal using an internal precision ADC. The digital output is then used as an input of the internal gain circuit, providing a precise control over current. The current can be adjusted by varying the applied PWM control voltage, allowing for precise and repeatable current control.

The LTC4353CDE#PBF is an ideal choice for those looking for a high performance and easily configurable current source/sink solution. Its wide range of applications, precise and repeatable current control, and internal protection features make it an ideal solution for building power management systems.

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