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LM3402MM/NOPB
LED Lighting Drivers 0.5A CONSTANT CRNT BUCK REG
LM3402MM/NOPB
LED Lighting Drivers 0.5A CONSTANT CRNT BUCK REG
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Manufacturer Part # : LM3402MM/NOPB
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Package/Case: VSSOP-8
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Brand: Texas Instruments
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Product Categories : LED Drivers
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Shipping & Payment
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Service & Packaging
Service & Packaging
About After Sales Service
All Parts Extended Quality Guarantee
Initiate the application within 90 days from the shipment date.
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LM3402MM/NOPB DataSheet
Current price plan is under preparation. Please contact our customer service team for the latest pricing information. Thank you for your understanding and support!
Details
The LM3402MM/NOPB is a cutting-edge monolithic switching regulator tailor-made for delivering constant currents to high power LEDs across diverse applications such as automotive, industrial, and general lighting. Equipped with a high-side N-channel MOSFET switch boasting a current limit of 735 mA, it is particularly well-suited for step-down (Buck) regulator setups. The regulator's unique hysteretic control mechanism with controlled ON-time, in conjunction with an external resistor, facilitates precise adjustment of the output voltage to provide a steady current to series and series-parallel LED arrays of varying configurations. Featuring LED dimming capabilities through pulse width modulation (PWM), protection against broken or open LEDs, low-power shutdown, and thermal shutdown, the LM3402MM/NOPB offers a comprehensive array of features to meet demanding lighting requirements
Key Features
- Wide Input Voltage Range with No Compensation Required
- High Efficiency and Low Dropout Voltage
- Suitable for Industrial, Automotive, and Medical Applications
- Meets IEC 61000-4-2 ESD Standard
- Complies with RoHS Directive on Lead-Free Content
Specifications
The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.
| Input voltage type | DC/DC | Topology | Buck |
| Vin (min) (V) | 6 | Vin (max) (V) | 42 |
| Vout (max) (V) | 40 | Vout (min) (V) | 0.2 |
| Iout (max) (A) | 0.5 | Iq (typ) (mA) | 0.6 |
| Features | Adjustable Switch Frequency, Enable/Shutdown, Integrated Switch, Thermal shutdown | Operating temperature range (°C) | -40 to 125 |
| Dimming method | PWM | Number of channels | 1 |
| Rating | Catalog |
FAQs
What is LM3402MM/NOPB?
The LM3402MM/NOPB is a constant current step-down LED driver designed by Texas Instruments. It is specifically tailored for driving high power LEDs in general lighting, signage, and automotive lighting applications.
How Does LM3402MM/NOPB Work?
The LM3402MM/NOPB operates by efficiently regulating the current flow through the connected LED load. It utilizes a step-down (buck) topology to convert a higher input voltage to a lower output voltage suitable for driving the LEDs with a constant current. This approach ensures consistent brightness and long-term reliability of the LED lighting system.
How Many Pins does LM3402MM/NOPB have and What are the Functions of the Pinout Configuration?
The LM3402MM/NOPB is housed in a 10-pin MSOP (Mini Small Outline Package) package. The pinout configuration includes:
- VIN: Input voltage supply pin.
- GND: Ground pin.
- FB: Feedback pin for setting the output current level.
- EN: Enable pin for turning the LED driver on or off.
- COMP: Compensation pin for loop stability and control.
- SS: Soft start pin for controlling the turn-on slew rate.
- RT/CLK: External resistor or clock input for setting the switching frequency.
- PGND: Power ground pin.
- SW: Switch node for connecting to the LED load.
What are the Pros and Cons of LM3402MM/NOPB?
Pros:
- High Efficiency: Operates with high efficiency, reducing power dissipation and maximizing battery life in portable applications.
- Wide Input Voltage Range: Supports a wide input voltage range, making it versatile for different power supply configurations.
- Constant Current Output: Provides a consistent current source for driving LEDs, ensuring uniform brightness and prolonged LED lifespan.
- Protection Features: Includes features such as thermal shutdown and overcurrent protection for safe operation.
Cons:
- External Components: May require additional external components such as an inductor and input/output capacitors for optimal operation.
- Complexity: The buck regulator topology may require careful design for optimal efficiency and performance.
Are There Any Equivalents/Alternatives to LM3402MM/NOPB for Recommendation?
- The LT3756 from Analog Devices is a comparable high-power LED driver with similar features and performance.
- Alternatives to the LM3402MM/NOPB include the MAX16834 from Maxim Integrated and the LT3496 from Analog Devices.
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