LM3552SDX
Product Overview
Category: Integrated Circuit (IC)
Use: LM3552SDX is a high-efficiency white LED driver designed for backlight applications in LCD displays. It provides a constant current output to drive up to 10 LEDs in series, making it suitable for use in smartphones, tablets, and other portable electronic devices.
Characteristics: - High efficiency - Wide input voltage range - Adjustable output current - Low dropout voltage - Over-temperature protection - Short-circuit protection
Package: LM3552SDX is available in a small outline package (SOP) with 8 pins.
Essence: The essence of LM3552SDX lies in its ability to efficiently drive white LEDs for backlighting purposes, ensuring optimal display quality in various electronic devices.
Packaging/Quantity: LM3552SDX is typically sold in reels containing 3000 units per reel.
Specifications
- Input Voltage Range: 2.7V to 5.5V
- Output Current Range: 5mA to 30mA
- Dropout Voltage: 100mV (typical)
- Operating Temperature Range: -40°C to +85°C
Pin Configuration
The LM3552SDX IC has the following pin configuration:
- VIN: Input voltage pin
- GND: Ground pin
- EN: Enable pin (active high)
- ISET: Output current setting pin
- FB: Feedback pin
- NC: No connection
- VOUT: Output voltage pin
- VLED: LED cathode pin
Functional Features
- Constant current output for driving up to 10 LEDs in series
- Adjustable output current through the ISET pin
- Over-temperature protection to prevent damage
- Short-circuit protection to ensure device safety
- Wide input voltage range for compatibility with various power sources
Advantages and Disadvantages
Advantages: - High efficiency ensures optimal power usage - Adjustable output current allows flexibility in LED brightness control - Over-temperature and short-circuit protection enhance device reliability - Wide input voltage range provides versatility in power supply options
Disadvantages: - Limited to driving up to 10 LEDs in series, may not be suitable for applications requiring more LEDs - Dropout voltage of 100mV may result in slight power loss
Working Principles
LM3552SDX operates by regulating the current flowing through the connected LEDs. The input voltage is converted to a constant current output, which is then used to drive the LEDs. The output current can be adjusted using the ISET pin, allowing control over the LED brightness.
Detailed Application Field Plans
LM3552SDX finds application in various electronic devices that require backlighting, such as: - Smartphones - Tablets - Portable gaming consoles - Digital cameras - Handheld GPS devices
Alternative Models
Some alternative models that provide similar functionality to LM3552SDX include: - LM3553SDX - LM3554SDX - LM3555SDX
These models offer comparable features and can be considered as alternatives based on specific requirements.
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기술 솔루션에 LM3552SDX 적용과 관련된 10가지 일반적인 질문과 답변을 나열하세요.
Sure! Here are 10 common questions and answers related to the application of LM3552SDX in technical solutions:
Q: What is LM3552SDX? A: LM3552SDX is a voltage-controlled current source designed for driving white LEDs in series.
Q: What is the input voltage range of LM3552SDX? A: The input voltage range of LM3552SDX is typically between 2.7V and 5.5V.
Q: How many LEDs can be driven by LM3552SDX? A: LM3552SDX can drive up to 6 LEDs in series.
Q: What is the maximum output current of LM3552SDX? A: The maximum output current of LM3552SDX is typically 30mA.
Q: Can LM3552SDX dim the LEDs? A: Yes, LM3552SDX supports PWM dimming control.
Q: Is LM3552SDX suitable for battery-powered applications? A: Yes, LM3552SDX has a low quiescent current and is suitable for battery-powered applications.
Q: Does LM3552SDX have built-in thermal protection? A: Yes, LM3552SDX includes thermal shutdown protection to prevent overheating.
Q: Can LM3552SDX operate in a wide temperature range? A: Yes, LM3552SDX is designed to operate in a temperature range of -40°C to +85°C.
Q: What is the package type of LM3552SDX? A: LM3552SDX is available in a small SOT-23 package.
Q: Are there any application notes or reference designs available for LM3552SDX? A: Yes, the datasheet of LM3552SDX provides application information and typical circuit examples.
Please note that these answers are general and may vary depending on the specific implementation and requirements of your technical solution.