SI9110DJ-E3

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PMIC - Voltage Regulators - DC DC Switching Controllers

The SI9110DJ-E3 is a high-speed DC-to-DC switch controller designed for switching power supply systems for portable and consumer devices. This device offers an optimized control system for pulse-width modulation (PWM) and pulse-frequency modulation (PFM) operation, and supports an ultra-fast response while maintaining high efficiency.

Application field of SI9110DJ-E3:

The SI9110DJ-E3 is targeted for DC-DC switching power supplies used in battery-powered and automotive applications.The typical applications include USB Power Delivery and PD (Power Distribution), DC-DC Sync Boost, Poly-Phase, SEPIC, and Isolated DC-DC conversion. These switching controllers are suitable for a wide range of operating frequency and output voltage, and can be used to deliver up to 18W of power in a single channel or 36W in a dual-channel configuration.

Working principle of SI9110DJ-E3:

The SI9110DJ-E3 device provides integrated power supply control for both boost, buck, SEPIC, and other topologies. The output voltage is adjusted through a modulation of the duty cycle and frequency of the switching waveform. The power supply system is controlled via an internal sawtooth voltage ramp, which is compared to the peak current descending ramp. When the current descending ramp intersects with the sawtooth ramp the switching controller pulses the power FETs in an effort to match the required voltage.

The SI9110DJ-E3 is capable of operating in various modes and offers various features, including constant frequency (CFM) and variable frequency (VFM) PFM mode, hysteretic control, user selectable start up current, cycle-by-cycle current limit, programmable UVLO, undervoltage lockout, hysteresis, and temperature compensation.

Conclusion ゠

The SI9110DJ-E3 is a high-speed DC-to-DC switch controller designed for switching power supply systems for portable and consumer devices, and it is ideal for both battery-powered and automotive applications. This device offers an optimized control system for both pulse-width modulation (PWM) and pulse-frequency modulation (PFM) operation, and is capable of delivering up to 18W of power in a single channel or 36W in a dual-channel configuration. It supports a variety of features and functions, such as constant frequency (CFM) and variable frequency (VFM) PFM mode, hysteretic control, user selectable start up current, cycle-by-cycle current limit, programmable UVLO, undervoltage lockout, hysteresis, and temperature compensation. This highly efficient device is a great choice for many different switching power applications.

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