LM3404EVAL: 1A @ Vin Max, 6 ~ 42V in
Summary
The LM3404 circuit and BOM have been designed to provide a constant forward current of 1.0A to a single LED with a forward voltage of approximately 3.7V (Typical of white, blue, and green LEDs using InGaN technology) from an input of 24V ±10%.
Over the input voltage range of 6V to 42V the average LED current, IF, is 1.0A ±10%, the ripple current, ΔiF, will not exceed 400 mAP-P, and the switching frequency is 450 kHz ± 10%.
The LM3404 Evaluation Board includes a female 6-pin SIP, J1, connector as well as two standard 94mil turret connectors for the cathode and anode connections of the LED array. Figure 1 shows the pinout of J1. Solid 18 or 20 gauge wire with about 1 cm of insulation stripped away makes a convenient, solderless connection to J1.
Over the input voltage range of 6V to 42V the average LED current, IF, is 1.0A ±10%, the ripple current, ΔiF, will not exceed 400 mAP-P, and the switching frequency is 450 kHz ± 10%.
The LM3404 Evaluation Board includes a female 6-pin SIP, J1, connector as well as two standard 94mil turret connectors for the cathode and anode connections of the LED array. Figure 1 shows the pinout of J1. Solid 18 or 20 gauge wire with about 1 cm of insulation stripped away makes a convenient, solderless connection to J1.
Specifications
| Manufacturer | Texas Instruments |
|---|---|
| Category | Lighting |
| Sub-Category | LED Drivers - DC In |
| Eval Board Part Number | LM3404EVAL/NOPB-ND |
| Eval Board Supplier | Texas Instruments |
| Eval Board |
Normally In Stock
|
| Voltage In |
6 ~ 42 V
|
| Topology |
Step Down
|
| Current Out |
1 A
|
| Voltage Out (Max) |
Up to Vin (42V Max)
|
| Outputs and Type |
1 Non-Isolated
|
| Efficiency @ Conditions |
>85%, 6 ~ 14V in, 3.7V @ 1 A
>80%, 6 ~ 40V in, 3.7V @ 1 A |
| Features |
Current Limit (Adj. or Fixed)
Dimming Control Open Circuit Protection Shutdown, Enable, Standby Thermal Protection |
| Switching Frequency |
450 kHz
|
| Component Count + Extras |
9 + 10
|
| Design Author |
Texas Instruments
|
| Application / Target Market | |
| Main I.C. Base Part |
LM3404
|
| Date Created By Author | |
| Date Added To Library | 2011-03 |
