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Key Document
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AN-1585 LM3402 and LM3404 High Power PSOP-8 Evaluation Board (Rev. C)
(PDF 179 KB)
01 May 2013 1,440views Read Abstract
Description
The LM3402/02HV and LM3404/04HV are buck regulator derived controlled current sources designed to drive a series string of high power, high brightness LEDs (HBLEDs) such as the Luxeon™ K2 Emitter at forward currents of up to 0.5A (LM3402/02HV) or 1.0A (LM3404/04HV). This evaluation board demonstrates the enhanced thermal performance of the PSOP-8 package option of any of those four ICs. The LM3404HV was chosen for the example circuit because the combination of high output current, high input voltage, and high duty cycle create the greatest demand for low junction-to-ambient thermal resistance (ΘJA). Note that the LM3404/04HV in SO-8 can also be used with this evaluation board, with reduced thermal performance.
Features
- Integrated 1.0A MOSFET
- VIN Range 6V to 42V (LM3404)
- VIN Range 6V to 75V (LM3404HV)
- 1.2A Output Current Over Temperature
- Cycle-by-Cycle Current Limit
- No Control Loop Compensation Required
- Separate PWM Dimming and Low Power Shutdown
- Supports All-Ceramic Output Capacitors and Capacitor-Less Outputs
- Thermal Shutdown Protection
- SO-8 Package, PSOP-8 Package
Applications:
- LED Driver
- Constant Current Source
- Automotive Lighting
- General Illumination
- Industrial Lighting
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Technical Documents
User Guides (2)
| Title | Abstract | Type | Size (KB) | Date | Views | TI Recommends |
|---|---|---|---|---|---|---|
| 179 | 01 May 2013 | 1,440 | ||||
| 476 | 27 Jan 2012 | 760 |
Related Products
Software (1)
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LM3404 Driving a Seoul Semi Zpower P4 1A LED CAD File
(ZIP, 212 KB) 351 views, 27 Jan 2012
TI Devices (4)
| Part Number | Name | Product Family | |
|---|---|---|---|
| LM3402 | 0.5A Constant Current Buck Regulator for High Power LED Drivers | Power Management | |
| LM3402HV | 0.5A Constant Current Buck Regulator for High Power LED Drivers | Power Management | |
| LM3404 | 1.0A Constant Current Buck Regulator for High Power LED Drivers | Power Management | |
| LM3404HV | 1.0A Constant Current Buck Regulator for High Power LED Drivers | Power Management | |
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