Overview
The SG2524DR, produced by Texas Instruments, is a versatile pulse-width modulation (PWM) controller designed for use in a wide range of power supply and switching regulator applications. This device integrates all the necessary functions for constructing regulating power supplies, inverters, or switching regulators on a single chip. It is particularly suited for high-power-output applications and supports both single-ended and push-pull configurations.
The SG2524DR operates at a fixed frequency programmed by a timing resistor (RT) and a timing capacitor (CT), allowing for precise control over the output pulse duration. It includes an onboard 5-V regulator, an error amplifier, a programmable oscillator, and current-limiting and shutdown circuitry, making it a comprehensive solution for various power management needs.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Voltage Range | 3.5 | 40 | V | |
| Output Voltage | 4.6 | 5 | 5.4 | V |
| Input Regulation (VCC = 8 V to 40 V) | 10 | 20 | 30 | mV |
| Output Regulation (IO = 0 mA to 20 mA) | 20 | 50 | 50 | mV |
| Collector-Emitter Breakdown Voltage | 40 | V | ||
| Collector-Emitter Saturation Voltage | 1 | 2 | V | |
| Operating Temperature Range | -25 | 85 | °C | |
| Frequency Range | up to 450 kHz | kHz |
Key Features
- Complete PWM Power-Control Circuitry: Includes all necessary functions for constructing regulating power supplies, inverters, or switching regulators.
- Uncommitted Outputs: Supports single-ended or push-pull applications.
- Onboard 5-V Regulator: Serves as a reference and supplies the internal regulator control circuitry.
- Programmable Oscillator: Frequency set by a timing resistor (RT) and a timing capacitor (CT).
- Error Amplifier: Differential-input transconductance amplifier with compensation node for DC gain control or AC phase compensation.
- Current Limiting and Shutdown Circuitry: Includes current-limiting sense amplifier and shutdown functionality.
- High-Gain Comparator and Pulse-Steering Flip-Flop: For precise control over output pulses.
- Low Standby Current: Typically 8 mA.
Applications
- Transformer-Coupled DC/DC Converters: Suitable for various transformer-coupled configurations.
- Switching Regulators: Can be used for switching regulators of any polarity.
- Transformerless Voltage Doublers: Supports transformerless voltage doubler applications.
- Polarity-Converter Applications: Employing fixed-frequency PWM techniques.
- Capacitor-Diode-Coupled Voltage Multipliers: Used in capacitor-diode-coupled voltage multiplier output stages.
- Inductor-Capacitor-Implemented Single-Ended Circuits: Suitable for single-ended inductor-capacitor circuits.
Q & A
- What is the operating voltage range of the SG2524DR?
The operating voltage range of the SG2524DR is from 3.5 V to 40 V.
- What is the typical output voltage of the SG2524DR?
The typical output voltage is 5 V.
- What is the maximum collector-emitter breakdown voltage?
The maximum collector-emitter breakdown voltage is 40 V.
- What is the operating temperature range of the SG2524DR?
The operating temperature range is from -25°C to 85°C.
- Can the SG2524DR be used in push-pull applications?
- How is the frequency of the SG2524DR programmed?
The frequency is programmed by a timing resistor (RT) and a timing capacitor (CT).
- What type of amplifier is the error amplifier in the SG2524DR?
The error amplifier is a differential-input transconductance amplifier.
- Does the SG2524DR have current limiting and shutdown circuitry?
- What are some common applications of the SG2524DR?
- What is the typical standby current of the SG2524DR?
