Overview
The STMicroelectronics SG3524N is a dual PWM (Pulse Width Modulation) controller integrated on a single monolithic chip. It is designed to incorporate all the necessary functions for constructing regulating power supplies, inverters, or switching regulators. The SG3524N is versatile and can be used in various applications, including switching regulators of either polarity, transformer-coupled DC-to-DC converters, transformerless voltage doublers, and polarity converter applications. It employs fixed-frequency, pulse-width modulation techniques and supports both single-ended and push-pull configurations.
Key Specifications
| Attribute | Value |
|---|---|
| Brand | STMicroelectronics |
| Maximum Switching Frequency | 300 kHz (typical), 722 kHz (maximum) |
| Output Voltage | 4.6 V to 5.4 V |
| Output Current | 50 mA |
| Control Method | Voltage Mode |
| Number of Outputs | 2 |
| Mounting Type | Through Hole |
| Fall Time | 100 ns |
| Rise Time | 200 ns |
| Package Type | PDIP, PDSO, SOIC |
| Topology | Boost, Buck, Fly-back, Forward, Push-Pull |
| Pin Count | 16 |
| Maximum Duty Cycle | 45% |
| Dimensions | 20 x 7.1 x 5.1 mm (PDIP) |
| Minimum Operating Temperature | 0 °C |
| Minimum Operating Supply Voltage | 8 V |
| Maximum Operating Temperature | +70 °C |
| Maximum Operating Supply Voltage | 40 V |
Key Features
- On-chip reference, error amplifier, programmable oscillator, pulse-steering flip flop, two uncommitted output transistors, high-gain comparator, and current-limiting and shut-down circuitry.
- Supports fixed-frequency, pulse-width modulation techniques.
- Can be used in single-ended or push-pull applications.
- Wide operating supply voltage range: 8V to 40V.
- Programmable oscillator frequency using a timing resistor (RT) and a timing capacitor (CT).
- Available in 16-pin PDIP, PDSO, and SOIC packages.
Applications
- Switching regulators of either polarity.
- Transformer-coupled DC-to-DC converters.
- Transformerless voltage doublers and polarity converters.
- Desktop PCs.
- Microwave ovens.
- Server power supplies.
- Solar micro-inverters and solar power inverters.
- Washing machines (low-end and high-end).
- E-bikes.
- Telecom/server AC/DC supplies.
- Smoke detectors.
Q & A
- What is the SG3524N used for?
The SG3524N is used for constructing regulating power supplies, inverters, or switching regulators, and it supports various applications including DC-to-DC converters, voltage doublers, and polarity converters.
- What is the operating supply voltage range of the SG3524N?
The operating supply voltage range of the SG3524N is from 8V to 40V.
- What are the available package types for the SG3524N?
The SG3524N is available in 16-pin PDIP, PDSO, and SOIC packages.
- What is the maximum switching frequency of the SG3524N?
The maximum switching frequency of the SG3524N is typically 300 kHz, but can reach up to 722 kHz.
- How is the oscillator frequency programmed in the SG3524N?
The oscillator frequency is programmed using a timing resistor (RT) and a timing capacitor (CT).
- What are the typical output voltage and current of the SG3524N?
The typical output voltage is between 4.6 V to 5.4 V, and the output current is 50 mA.
- What are the rise and fall times of the SG3524N?
The rise time is 200 ns, and the fall time is 100 ns.
- What is the maximum duty cycle of the SG3524N?
The maximum duty cycle is 45%.
- What are some common applications of the SG3524N?
Common applications include desktop PCs, microwave ovens, server power supplies, solar micro-inverters, washing machines, e-bikes, and telecom/server AC/DC supplies.
- What is the operating temperature range of the SG3524N?
The operating temperature range is from 0 °C to +70 °C.
- Does the SG3524N have built-in protection features?
Yes, the SG3524N includes current-limiting and shut-down circuitry for enhanced robustness and reliability.
