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.
LED drivers are often placed in small, closed spaces with no air flow and high ambient temperature due to the dissipation of the LEDs. When properly soldered the PSOP-8 package offers a θJA that is as little as one-half that of the standard SO-8 package, and as little as one-third that of the MSOP-8 package.
| Manufacturer | Texas Instruments |
|---|---|
| Category | Lighting |
| Sub-Category | LED Drivers - DC In |
| Eval Board Part Number | 296-49203-ND |
| Eval Board Supplier | Texas Instruments |
| Eval Board |
Normally In Stock
|
| Voltage In |
40 ~ 60 V
|
| Topology |
Step Down
|
| Current Out |
1 A
|
| Voltage Out (Max) |
37 V
|
| Outputs and Type |
1 Non-Isolated
|
| Efficiency @ Conditions |
>95%, 40 ~ 60V in, 10 LEDs @ 1 A
|
| Features |
Current Limit (Adj. or Fixed)
Dimming Control Open Circuit Protection Shutdown, Enable, Standby Thermal Protection |
| Switching Frequency |
550 kHz
|
| Component Count + Extras |
10 + 8
|
| Design Author |
Texas Instruments
|
| Application / Target Market | |
| Main I.C. Base Part |
LM3404HVMR
|
| Date Created By Author | |
| Date Added To Library | 2011-03 |
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