SG1845Y-883B

Product Overview

Category

SG1845Y-883B belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used in power supply applications.

Characteristics

• High efficiency
• Low power consumption
• Wide input voltage range
• Stable output voltage
• Overload and short-circuit protection

Package

SG1845Y-883B is available in a compact 8-pin DIP (Dual Inline Package) format.

Essence

The essence of SG1845Y-883B lies in its ability to regulate and control the output voltage of a power supply circuit.

Packaging/Quantity

SG1845Y-883B is typically packaged in reels or tubes, with a quantity of 1000 units per package.

Specifications

• Input Voltage Range: 7V to 40V
• Output Voltage Range: 1.25V to 37V
• Output Current: Up to 500mA
• Operating Temperature Range: -40°C to +85°C
• Frequency Range: 50kHz to 500kHz

Detailed Pin Configuration

1. COMP: Compensation pin for regulating the output voltage.
2. FB: Feedback pin for sensing the output voltage.
3. RT/CT: Timing components connection pins for setting the oscillator frequency.
4. GND: Ground reference pin.
5. VREF: Reference voltage output pin.
6. CT: Timing capacitor connection pin.
7. OSC: Oscillator timing resistor connection pin.
8. VCC: Power supply input pin.

Functional Features

• Voltage regulation: SG1845Y-883B provides precise voltage regulation, ensuring a stable output voltage even under varying load conditions.
• Overload and short-circuit protection: The IC incorporates built-in protection mechanisms to safeguard against overloading and short-circuits, preventing damage to the power supply circuit.
• Wide input voltage range: SG1845Y-883B can operate within a wide range of input voltages, making it suitable for various applications.
• High efficiency: The IC exhibits high efficiency, minimizing power losses and maximizing energy conversion.

Advantages and Disadvantages

Advantages

• Precise voltage regulation
• Overload and short-circuit protection
• Wide input voltage range
• High efficiency

Disadvantages

• Limited output current capacity (up to 500mA)
• Requires external timing components for frequency adjustment

Working Principles

SG1845Y-883B operates based on the principle of pulse width modulation (PWM). It compares the feedback voltage with a reference voltage and adjusts the duty cycle of the output waveform accordingly. By controlling the duty cycle, the IC regulates the output voltage to maintain a constant value.

Detailed Application Field Plans

SG1845Y-883B finds extensive use in various power supply applications, including: 1. Switching power supplies 2. Battery chargers 3. LED drivers 4. Industrial control systems 5. Automotive electronics

Detailed and Complete Alternative Models

1. LM2576-ADJ: Adjustable voltage regulator IC with similar specifications and features.
2. MC34063A: Step-up, step-down, and inverting switching regulator IC suitable for various applications.
3. LT1073: Micropower DC-DC converter IC with adjustable output voltage.

These alternative models offer comparable functionality and can be used as substitutes for SG1845Y-883B in different applications.

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