SC2442HITSTRT

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The SC2442HITSTRT device is a High voltage, high frequency, pulse-width modulation (PWM) switching controller tailored for automotive systems. This device consists of a fixed frequency control core and many peripherals, making it highly versatile for a wide range of applications. The use of auxiliary power supply (VDD2) enables the IC to handle large input voltage variations as well as power up from low system supply voltage.

The SC2442HITSTRT is ideal for applications such as buck, boosters, and SEPIC (single-ended, primary-inductor) converters, as well as battery chargers, point-of-load (POL) converters, and linear regulators in automotive systems. One of the key features that distinguish this family of devices is the Start-up Current Detector (SUCD), which seamlessly transitions the system from sleep to active states. This device also provides improved transient immunity and significantly reduced component counts.

Application Field: The SC2442HITSTRT devices are used in various automotive applications such as DC/DC power supplies, motor drives, and vehicle power management. These devices are suitable for applications requiring large input voltage variations, such as those found in automotive systems.

Working Principle: The SC2442HITSTRT is a high voltage, high frequency pulse width modulation (PWM) switching controller. It senses current through an on-chip SUCD in order to provide seamless transitions from sleep to active states. The device also provides improved transient immunity and significantly reduced component counts.

The device includes an adjustable digital pulse-width modulator (DPWM) and the necessary power-management circuits, including a voltage-controlled oscillator (VCO), synchronous rectifier (SR), SUCD, and power-on-reset (POR). The PWM modulator is programmable with adjustable regulating frequency and variable pulse-width-modulation rate, which can be set using external resistors and capacitors.

The on-chip digital current-setting resistor (RCurr) allows the output current to be controlled without the need for an external resistor. The ratio of RCurr to the magnitude of the input voltage determines the output current.

The on-chip low-side synchronous rectifier (LS SR) consists of an active low-side MOSFET, along with a gate-drive circuit and an on-chip bootstrap diode. The on-chip bootstrap diode helps maintain the gate voltage of the low side MOSFET while the gate drive circuit helps regulate the timing of the low side MOSFET during its on-state. This helps to reduce switching losses.

The on-chip start-up current detector (SUCD) senses the current flowing through its associated resistor, and reacts by adjusting the PWM output duty cycle. The SUCD can be used to sense the presence of an external load, or it can be used to monitor the closed-loop operation of the device.

The SC2442HITSTRT devices have an adjustable digital PWM modulator, enabling high-accuracy current regulation. The on-chip digital current-setting resistor (RCurr) helps minimize power dissipation and improves efficiency. The on-chip SUCD helps sense the presence of an external load and adjusts the PWM output accordingly. The integrated low side synchronous rectifier (LS SR), along with the on-chip bootstrap diode, reduces switching losses and improves performance.

The SC2442HITSTRT devices are ideal for applications such as buck, boost, and SEPIC converters, as well as battery chargers, point-of-load (POL) converters, and linear regulators in automotive systems. The versatility of this device, combined with the advanced features integrated on-chip, makes it an attractive option for automotive applications.

The specific data is subject to PDF, and the above content is for reference