SG3524DE4

Frequency - Switching:	450kHz
Base Part Number:	SG3524
Supplier Device Package:	16-SOIC
Package / Case:	16-SOIC (0.154", 3.90mm Width)
Operating Temperature:	0°C ~ 70°C (TA)
Control Features:	Current Limit, Frequency Control
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	No
Duty Cycle (Max):	45%
Series:	--
Voltage - Supply (Vcc/Vdd):	8 V ~ 40 V
Output Phases:	1
Number of Outputs:	2
Topology:	Buck, Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, Push-Pull
Output Configuration:	Positive, Isolation Capable
Function:	Step-Up, Step-Down, Step-Up/Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tube

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SG3524DE4 Application Field and Working Principle

The SG3524DE4 is a voltage regulator commonly used in DC DC switching controllers. It provides precise voltage regulation and efficient operation with high switching frequencies and low power conduction losses. It also offers critical features, such as protection against under-voltage and over-voltage, current-limiting, and thermal shutdown.

Applications

The SG3524DE4 is well suited for applications such as UPS, inverters, power converters, digital motor control, telecommunication equipment, and automotive systems. It can also be used in battery-operated devices and solar energy systems.

Features

The SG3524DE4 has several features that make it ideal for multiple applications. These include: • Built-in voltage reference.• Internal temperature sensor.• Fixed-frequency pulse-width modulation (PWM) control.• Adjustable peak current-limiting for improved load sharing.• Adjustable dead-time control for improved efficiency.• Adjustable reference voltage from 0.8V to 2V.• On-chip logic for simplified system design.

Working Principle

The SG3524DE4 is an integrated pulse width modulation (PWM) controller, designed to switch a high-current load at a constant frequency. When an input voltage is applied, the output voltage of the regulator is set by the internal voltage reference. The voltage reference, along with the two comparators and two error amplifiers, form a closed loop control system. The sensing circuit monitors the output voltage and compares it to the reference voltage. Any deviations are fed back to the error amplifier, which then adjusts the PWM generator duty cycle and adjusts the output current to hold the output voltage at a constant level.The resistors and capacitor connected to pins 7 and 8 set the oscillator frequency and the dead-time, while the resistors connected to pins 12 and 13 adjust the peak current-limit level. The SG3524DE4 also includes an on-chip temperature sensor and a thermal shutdown circuit that can trip when the thermistor temperature reaches a certain level.

Conclusion

The SG3524DE4 is a powerful and flexible voltage regulator that is suitable for a variety of applications. Its wide range of features, including adjustable dead-time and peak current-limit, make it easy to customize for a variety of applications. Its integrated thermal shutdown circuitry provides a safe and reliable operation under high temperature environments. With its efficient switching capability and precise voltage regulation, the SG3524DE4 is the ideal voltage regulator for a variety of applications.

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