Microsemi Corporation
Bild kan vara representation.
Se specifikationer för produktinformation.
SG2845M
Visa detalj Datablad

SG2845M

Product Overview

Category

SG2845M belongs to the category of integrated circuits (ICs).

Use

It is commonly used as a voltage reference in various electronic applications.

Characteristics

  • High precision and stability
  • Low temperature coefficient
  • Wide operating temperature range
  • Low power consumption

Package

SG2845M is available in a small outline package (SOP) or dual inline package (DIP).

Essence

The essence of SG2845M lies in its ability to provide a stable voltage reference for accurate circuit operation.

Packaging/Quantity

SG2845M is typically packaged in reels or tubes, with quantities varying depending on the supplier.

Specifications

  • Input Voltage Range: 4.5V to 40V
  • Output Voltage: 5V
  • Temperature Coefficient: ±50ppm/°C
  • Operating Temperature Range: -40°C to +85°C
  • Supply Current: 1.5mA

Detailed Pin Configuration

SG2845M has a standard pin configuration with the following pins:

  1. Vref: Voltage reference output
  2. GND: Ground
  3. Vin: Input voltage
  4. Vout: Output voltage
  5. NC: No connection
  6. NC: No connection

Functional Features

  • Precise voltage reference for accurate circuit operation
  • Stable output voltage regardless of input variations
  • Low temperature coefficient ensures minimal drift over temperature changes
  • Low power consumption for energy-efficient designs

Advantages

  • High precision and stability ensure reliable performance
  • Wide operating temperature range allows usage in various environments
  • Low power consumption prolongs battery life in portable devices

Disadvantages

  • Limited output voltage options restrict certain applications
  • Higher cost compared to some alternative models

Working Principles

SG2845M utilizes internal circuitry to generate a stable reference voltage. It compensates for input variations and temperature changes, providing a consistent output voltage.

Detailed Application Field Plans

SG2845M finds applications in various electronic systems, including:

  1. Power supply units
  2. Battery charging circuits
  3. Voltage regulators
  4. Analog-to-digital converters
  5. Precision measurement instruments

Detailed and Complete Alternative Models

  • LM4040: Low-power precision voltage reference
  • REF3025: High-accuracy voltage reference with low dropout voltage
  • MAX619: Ultra-low power voltage reference with wide operating range

(Note: This list is not exhaustive and other alternative models are available.)

In conclusion, SG2845M is a high-precision voltage reference IC used in a wide range of electronic applications. Its stable output voltage, low temperature coefficient, and low power consumption make it a reliable choice for accurate circuit operation. However, its limited output voltage options and higher cost compared to some alternatives should be considered when selecting the appropriate voltage reference IC for a specific application.

Lista 10 Vanliga frågor och svar relaterade till tillämpningen av SG2845M i tekniska lösningar

Sure! Here are 10 common questions and answers related to the application of SG2845M in technical solutions:

  1. Q: What is SG2845M? A: SG2845M is a voltage mode PWM controller IC used in power supply applications.

  2. Q: What is the input voltage range for SG2845M? A: The input voltage range for SG2845M is typically between 7V and 40V.

  3. Q: What is the output voltage range that can be achieved using SG2845M? A: The output voltage range depends on the external components used, but it can typically be adjusted from 0V to the input voltage.

  4. Q: Can SG2845M handle high current loads? A: No, SG2845M is a controller IC and cannot handle high current loads directly. It requires external power devices such as MOSFETs or transistors to handle high currents.

  5. Q: What is the maximum switching frequency supported by SG2845M? A: The maximum switching frequency supported by SG2845M is typically around 500kHz.

  6. Q: How does SG2845M regulate the output voltage? A: SG2845M uses a feedback loop to compare the actual output voltage with a reference voltage and adjusts the duty cycle of the PWM signal to maintain the desired output voltage.

  7. Q: Can SG2845M be used in both buck and boost converter configurations? A: Yes, SG2845M can be used in both buck (step-down) and boost (step-up) converter configurations depending on the external components and circuit design.

  8. Q: Does SG2845M have built-in protection features? A: Yes, SG2845M has built-in protection features such as overvoltage protection (OVP), undervoltage lockout (UVLO), and thermal shutdown.

  9. Q: What is the typical efficiency of a power supply using SG2845M? A: The efficiency of a power supply using SG2845M depends on various factors such as input/output voltage, load current, and circuit design. It can typically achieve efficiencies above 80%.

  10. Q: Are there any application notes or reference designs available for SG2845M? A: Yes, the manufacturer of SG2845M usually provides application notes and reference designs that can help in understanding and implementing the IC in different technical solutions.