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HV9918K7-G
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HV9918K7-G

Product Overview

Category

HV9918K7-G belongs to the category of integrated circuits (ICs) used in lighting applications.

Use

This product is primarily used for driving high-brightness LEDs in various lighting systems.

Characteristics

  • High efficiency: The HV9918K7-G offers high power conversion efficiency, resulting in reduced energy consumption.
  • Wide input voltage range: It can operate with a wide range of input voltages, making it suitable for different power supply configurations.
  • Dimming control: The IC supports dimming control, allowing for adjustable brightness levels in lighting applications.
  • Protection features: It incorporates various protection mechanisms such as over-temperature and over-voltage protection, ensuring safe operation.

Package

The HV9918K7-G is available in a compact and industry-standard SOP-8 package.

Essence

The essence of this product lies in its ability to efficiently drive high-brightness LEDs while providing dimming control and protection features.

Packaging/Quantity

The HV9918K7-G is typically packaged in reels containing 2500 units per reel.

Specifications

  • Input Voltage Range: 4.5V to 40V
  • Output Voltage Range: Up to 60V
  • Maximum Output Current: 1.5A
  • Switching Frequency: 200kHz to 1MHz
  • Dimming Control: Analog/PWM
  • Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The HV9918K7-G has eight pins arranged as follows:

  1. VIN: Input voltage pin
  2. GND: Ground pin
  3. FB: Feedback pin for regulating output voltage
  4. DIM: Dimming control input pin
  5. EN: Enable pin for turning on/off the IC
  6. CS: Current sense pin for monitoring LED current
  7. SW: Switching node pin
  8. VCC: Supply voltage pin for internal circuitry

Functional Features

  • Constant Current Control: The HV9918K7-G ensures a stable and accurate output current to drive high-brightness LEDs.
  • Dimming Control: It supports both analog and pulse-width modulation (PWM) dimming control methods, allowing for adjustable brightness levels.
  • Protection Mechanisms: The IC incorporates over-temperature, over-voltage, and short-circuit protection features to safeguard the LED and the IC itself.
  • Wide Input Voltage Range: The product can handle a wide range of input voltages, making it suitable for various power supply configurations.

Advantages and Disadvantages

Advantages

  • High efficiency resulting in reduced energy consumption
  • Wide input voltage range for versatile applications
  • Dimming control capability for adjustable brightness levels
  • Integrated protection mechanisms for enhanced reliability

Disadvantages

  • Limited maximum output current of 1.5A
  • Requires external components for proper operation

Working Principles

The HV9918K7-G operates as a constant current LED driver. It regulates the LED current by adjusting the duty cycle of the internal switching regulator. The feedback pin (FB) monitors the output voltage and adjusts the duty cycle accordingly to maintain a constant current through the LED. The dimming control input (DIM) allows for adjusting the brightness level by modulating the duty cycle using either an analog or PWM signal.

Detailed Application Field Plans

The HV9918K7-G finds applications in various lighting systems, including: - Indoor and outdoor LED lighting fixtures - Automotive lighting - Backlighting for LCD displays - Street lighting - Architectural lighting

Detailed and Complete Alternative Models

  • HV9918K7: Similar to HV9918K7-G but without the SOP-8 package option
  • HV9918K7-GP: Enhanced version with additional protection features
  • HV9918K7-LM: Low-power variant suitable for battery-powered applications

These alternative models offer similar functionality and can be considered based on specific requirements.

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Liste 10 almindelige spørgsmål og svar relateret til anvendelsen af HV9918K7-G i tekniske løsninger

Sure! Here are 10 common questions and answers related to the application of HV9918K7-G in technical solutions:

  1. Q: What is HV9918K7-G? A: HV9918K7-G is a high-efficiency LED driver IC designed for driving LEDs in general lighting applications.

  2. Q: What is the input voltage range supported by HV9918K7-G? A: HV9918K7-G supports an input voltage range from 4.5V to 40V.

  3. Q: What is the maximum output current that HV9918K7-G can handle? A: HV9918K7-G can handle a maximum output current of 1.5A.

  4. Q: Can HV9918K7-G be used for dimming LED lights? A: Yes, HV9918K7-G supports analog dimming control using a PWM signal.

  5. Q: Is HV9918K7-G suitable for both buck and boost LED driver applications? A: No, HV9918K7-G is specifically designed for buck (step-down) LED driver applications.

  6. Q: Does HV9918K7-G have built-in over-temperature protection? A: Yes, HV9918K7-G has built-in thermal shutdown protection to prevent overheating.

  7. Q: Can HV9918K7-G operate in continuous or discontinuous conduction mode? A: HV9918K7-G can operate in both continuous and discontinuous conduction modes, depending on the application requirements.

  8. Q: What is the typical efficiency of HV9918K7-G? A: The typical efficiency of HV9918K7-G is around 90% under normal operating conditions.

  9. Q: Does HV9918K7-G require an external MOSFET for LED current regulation? A: Yes, HV9918K7-G requires an external N-channel MOSFET for LED current regulation.

  10. Q: Can HV9918K7-G be used in automotive lighting applications? A: Yes, HV9918K7-G is suitable for automotive lighting applications as it can handle the required input voltage range and has built-in protection features.

Please note that these answers are general and may vary depending on specific application requirements and design considerations.