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LM3509SDX/NOPB
Product Overview
- Category: Integrated Circuit (IC)
- Use: LED Driver
- Characteristics: High Efficiency, Adjustable Current, Wide Input Voltage Range
- Package: LLP-10 (Leadless Package)
- Essence: The LM3509SDX/NOPB is a high-efficiency LED driver IC designed to drive up to 6 series-connected LEDs with a wide input voltage range.
- Packaging/Quantity: Tape and Reel, 2500 units per reel
Specifications
- Input Voltage Range: 2.7V to 5.5V
- Output Current Range: Up to 30mA
- Switching Frequency: 1.2MHz
- Dimming Control: PWM (Pulse Width Modulation)
- Operating Temperature Range: -40°C to +85°C
Detailed Pin Configuration
The LM3509SDX/NOPB has the following pin configuration:
- VIN: Input voltage pin
- GND: Ground pin
- EN: Enable pin
- DIM: Dimming control pin
- FB: Feedback pin
- LX: Switch node pin
- SW: Switch pin
- VOUT: Output voltage pin
- NC: No connection
- NC: No connection
Functional Features
- High efficiency up to 90%
- Adjustable output current through external resistor
- Wide input voltage range allows for battery-powered applications
- Integrated soft-start feature for controlled startup
- Over-temperature protection
- Short-circuit protection
Advantages and Disadvantages
Advantages
- High efficiency leads to longer battery life in portable devices
- Adjustable output current allows flexibility in LED brightness control
- Wide input voltage range enables usage with various power sources
- Integrated protection features enhance reliability
Disadvantages
- Limited output current range may not be suitable for high-power LED applications
- LLP-10 package may require specialized equipment for soldering and handling
Working Principles
The LM3509SDX/NOPB is a step-up DC-DC converter that uses a fixed-frequency, current-mode architecture to drive LEDs. It converts the input voltage to a higher voltage required by the LED string while regulating the output current. The dimming control pin allows for brightness adjustment using PWM signals.
Detailed Application Field Plans
The LM3509SDX/NOPB is commonly used in various applications, including:
- Portable electronic devices such as smartphones, tablets, and portable gaming consoles
- Automotive interior and exterior lighting
- Backlighting for LCD displays and keypads
- General-purpose LED lighting
Detailed and Complete Alternative Models
- LM3409: Similar LED driver IC with higher output current capability
- LM3410: Step-up LED driver IC with integrated Schottky diode
- LM3508: LED driver IC with lower input voltage range and adjustable switching frequency
These alternative models offer different specifications and features to suit specific application requirements.
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Listen Sie 10 häufige Fragen und Antworten im Zusammenhang mit der Anwendung von LM3509SDX/NOPB in technischen Lösungen auf
Question: What is the input voltage range for LM3509SDX/NOPB?
Answer: The input voltage range for LM3509SDX/NOPB is 2.7V to 5.5V.
Question: What is the maximum output current of LM3509SDX/NOPB?
Answer: The maximum output current of LM3509SDX/NOPB is 30mA.
Question: Can LM3509SDX/NOPB be used in automotive applications?
Answer: Yes, LM3509SDX/NOPB is suitable for automotive applications.
Question: What is the typical efficiency of LM3509SDX/NOPB?
Answer: The typical efficiency of LM3509SDX/NOPB is 90%.
Question: Does LM3509SDX/NOPB have built-in over-temperature protection?
Answer: Yes, LM3509SDX/NOPB features built-in over-temperature protection.
Question: What is the operating temperature range for LM3509SDX/NOPB?
Answer: The operating temperature range for LM3509SDX/NOPB is -40°C to 125°C.
Question: Can LM3509SDX/NOPB drive multiple LEDs in series?
Answer: Yes, LM3509SDX/NOPB can drive multiple LEDs in series.
Question: Is LM3509SDX/NOPB compatible with PWM dimming control?
Answer: Yes, LM3509SDX/NOPB is compatible with PWM dimming control.
Question: What is the typical dropout voltage of LM3509SDX/NOPB?
Answer: The typical dropout voltage of LM3509SDX/NOPB is 200mV.
Question: Does LM3509SDX/NOPB require external compensation components?
Answer: No, LM3509SDX/NOPB does not require external compensation components.