Overview
The SG3524D, produced by Microchip Technology, is a highly integrated pulse-width modulation (PWM) power control circuit. This device incorporates all the necessary functions for constructing regulating power supplies, inverters, or switching regulators on a single chip. It is designed for switching regulators of either polarity, transformer-coupled DC-DC converters, transformerless voltage doublers, and polarity-converter applications using fixed-frequency PWM techniques.
The SG3524D includes an on-chip reference, error amplifier, programmable oscillator, pulse-steering flip-flop, two uncommitted output transistors, a high-gain comparator, and current-limiting and shutdown circuitry. This makes it versatile for various high-power-output applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VIN) | 8 to 40 | V |
| Collector Output Current | 100 | mA |
| Reference Output Current | 0 to 20 | mA |
| Current Through CT Terminal | -0.03 to -2 | mA |
| Timing Resistor (RT) | 1.8 to 100 | KΩ |
| Timing Capacitor (CT) | 0.001 to 0.1 | µF |
| Oscillator Frequency Range | 100Hz to 400kHz | |
| Operating Temperature Range | 0 to 70 | °C |
| Package | 16-SOIC (0.154", 3.90mm Width) | |
| Mounting Type | Surface Mount | |
| Duty Cycle (Max) | 49% | |
| Number of Outputs | 2 |
Key Features
- Complete Pulse-Width Modulation (PWM) power-control circuitry
- Uncommitted outputs for single-ended or push-pull applications
- Low standby current of 8 mA typical
- Programmable oscillator with a frequency range of 100Hz to 400kHz
- On-chip 5V reference trimmed to 1% accuracy
- Dual 100 mA output transistors
- High-gain comparator and current-limiting and shutdown circuitry
- Excellent external sync capability
Applications
- Switching regulators of either polarity
- Transformer-coupled DC-DC converters
- Transformerless voltage doublers
- Polarity-converter applications
- High-power-output applications
Q & A
- What is the SG3524D used for?
The SG3524D is used for constructing regulating power supplies, inverters, or switching regulators. It is also used in transformer-coupled DC-DC converters, transformerless voltage doublers, and polarity-converter applications.
- What is the supply voltage range for the SG3524D?
The supply voltage range for the SG3524D is from 8V to 40V.
- What is the typical standby current of the SG3524D?
The typical standby current of the SG3524D is 8 mA.
- How is the oscillator frequency programmed in the SG3524D?
The oscillator frequency is programmed using one timing resistor (RT) and one timing capacitor (CT), according to the formula: f = 1.18 / (RT * CT), where RT is in KΩ and CT is in µF.
- What are the key components included in the SG3524D?
The SG3524D includes an on-chip reference, error amplifier, programmable oscillator, pulse-steering flip-flop, two uncommitted output transistors, a high-gain comparator, and current-limiting and shutdown circuitry.
- What is the operating temperature range for the SG3524D?
The operating temperature range for the SG3524D is from 0°C to 70°C.
- What types of applications can the SG3524D be used in?
The SG3524D can be used in switching regulators, transformer-coupled DC-DC converters, transformerless voltage doublers, and polarity-converter applications.
- How many output transistors does the SG3524D have?
The SG3524D has two uncommitted output transistors, each capable of handling up to 100 mA.
- Does the SG3524D support external synchronization?
Yes, the SG3524D has excellent external sync capability.
- What is the package type for the SG3524D?
The SG3524D is available in a 16-SOIC package.
