The purpose of this evaluation board is to provide an application example of a six-channel, medium-current LED driver using the ALED7707 chip. The monolithic boost converter provides the required LED supply voltage starting from a single supply rail, while the brightness of the LED strings connected to the six outputs is controlled through a PWM signal.
Open LED and LED short-circuit fault conditions are detected and managed.
The board has been designed to provide a compact reference solution for automotive applications involving several LEDs arranged in multiple strings (e.g. interior lighting, infotainment LCD backlighting, etc.).
| Manufacturer | STMicroelectronics |
|---|---|
| Category | Lighting |
| Sub-Category | LED Drivers - DC In |
| Eval Board Part Number | 497-15864-ND |
| Eval Board Supplier | STMicroelectronics |
| Eval Board |
Normally In Stock
|
| Voltage In |
6 ~ 32 V
|
| Topology |
Step Up
|
| Current Out |
70 mA (x6 channels)
|
| Voltage Out (Max) |
36 V
|
| Outputs and Type |
6 Non-Isolated
|
| Efficiency @ Conditions |
>88%, 16V in, 17 ~ 32 V
>87%, 12V in, 14.2 ~ 32 V >85%, 8V in, 11.5 ~ 29 V |
| Features |
Current Limit (Adj. or Fixed)
Dimming Control Open Circuit Protection Over Voltage Protection PWM Interface Short Circuit Protection Shutdown, Enable, Standby Soft Start Synchronizable Thermal Protection |
| Switching Frequency |
250 kHz ~ 1 MHz
|
| Component Count + Extras |
47 + 19
|
| Design Author |
STMicroelectronics
|
| Application / Target Market |
Automotive
LCD Backlighting |
| Main I.C. Base Part |
ALED7707
|
| Date Created By Author | 2015-06 |
| Date Added To Library | 2019-09 |
Italy
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