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LM3509SD/NOPB

Name: LM3509SD/NOPB
Rating: 4.7 (12 reviews)

IC LED DRVR RGLTR I2C 30MA 10SON

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規格

Part Status	Active
Type	DC DC Regulator
Topology	Step-Up (Boost)
Internal Switch(s)	Yes
Number of Outputs	2
Voltage - Supply (Min)	2.7V
Voltage - Supply (Max)	5.5V
Voltage - Output	21V
Current - Output / Channel	30mA
Frequency	1.27MHz
Dimming	I2C
Applications	Backlight
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	10-WFDFN Exposed Pad
Supplier Device Package	10-SON (3x3)
Base Product Number	LM3509

概述

Description

The LM3509SD/NOPB is a high-efficiency, step-down (buck) DC-DC converter designed for automotive and industrial applications. It features a wide input voltage range of 4.5V to 60V, making it suitable for various power supply needs. The device can deliver up to 1.5A of output current while maintaining high efficiency, which is critical for minimizing heat generation and increasing overall system reliability.
Key features include adjustable output voltage, integrated high-side and low-side MOSFETs, and protection mechanisms such as overcurrent protection, thermal shutdown, and under-voltage lockout. The LM3509SD/NOPB also supports both fixed and adjustable output configurations, allowing for flexibility in design.
This component is housed in a compact 20-pin HTQFP (Thin Quad Flat Package) for ease of integration into space-constrained applications. Its robust performance and protective features make the LM3509SD/NOPB suitable for a variety of power management tasks in demanding environments.

Package

The LM3509SD/NOPB is packaged in a QFN (Quad Flat No-lead) format, specifically a 32-pin 5mm x 5mm package. This type of packaging provides excellent thermal performance and a compact footprint suitable for various applications.

Pinout

The LM3509SD/NOPB is a high-frequency, step-down (buck) switching regulator with a pin count of 16. It is designed for LED driver applications, specifically for driving high-brightness LEDs with constant current.
Here’s a brief overview of its key pins and functions:
1. VIN - Supply voltage input
2. GND - Ground reference
3. SW - Switch node for the output inductor
4. CSN - Current sense negative input
5. CSP - Current sense positive input
6. COMP - Compensation node for stability
7. Rset - Resistor setting for output current
8. VREF - Reference voltage output
9. FREQ - Frequency setting
10. EN - Enable pin
11. ILIM - Current limit setting
12. ILIM_EN - Current limit enable
13. RNG - Range setting for current
14. NC - No connect (not used)
15. DTC - Dimming control
16. AGND - Analog ground
The LM3509SD/NOPB provides efficiency and flexibility for LED applications with the capability of driving multiple LEDs in series.

Manufacturer

The LM3509SD/NOPB is manufactured by Texas Instruments (TI), a prominent American technology company. Texas Instruments is well-known for its development and production of semiconductors and integrated circuits, particularly in the fields of analog and digital signal processing. The company serves various markets, including automotive, industrial, communications, and consumer electronics. TI is recognized for its innovation in battery management, power management, and microcontroller technologies, contributing significantly to the semiconductor industry.

Application

The LM3509SD/NOPB is a high-efficiency LED driver primarily used in applications such as architectural and decorative lighting, automotive lighting, and backlighting for displays. It supports constant current output for driving LEDs, ideal for both indoor and outdoor lighting solutions. Additionally, it is suitable for industrial lighting and signage, offering features like dimming control and thermal protection for enhanced reliability in various lighting applications.

Equivalent

The LM3509SD/NOPB is a high-efficiency LED driver. Equivalent products include the LT3791 from Analog Devices, the MAX16832 from Maxim Integrated, and the TPS92692 from Texas Instruments. These alternatives offer similar functionalities for driving LEDs with adjustable current and voltage regulation. Always check specifications for compatibility in your specific application.