SC624ULTRT vs LC5555LD
| Part Number |
|
|
| Category | PMIC - LED Drivers | PMIC - LED Drivers |
| Manufacturer | Semtech Corporation | Sanken |
| Description | IC LED DRIVER RGLTR 25MA 20MLPQ | IC LED DRIVER OFFL SWITCHER 8DIP |
| Package | Tape & Reel (TR) | Tape & Reel (TR) |
| Series | mAhXLife™ | - |
| Type | DC DC Regulator | AC DC Offline Switcher |
| Operating Temperature | -40°C ~ 85°C (TA) | -55°C ~ 125°C (TA) |
| Mounting Type | Surface Mount | Through Hole |
| Package / Case | 20-VFQFN Exposed Pad | 8-DIP (0.300\", 7.62mm), 7 Leads |
| Supplier Device Package | 20-MLPQ-UT (3x3) | 8-DIP |
| Topology | Switched Capacitor (Charge Pump) | Step-Down (Buck) |
| Applications | Backlight | - |
| Number of Outputs | 4 | 1 |
| Voltage - Output | 2.5V ~ 5.25V | - |
| Frequency | - | - |
| Current - Output / Channel | 25mA | - |
| Internal Switch(s) | Yes | Yes |
| Dimming | - | - |
| Voltage - Supply (Max) | 5.5V | 18V |
| Voltage - Supply (Min) | 3V | - |
-
1. What is an LED driver for?
The main role of LED drivers is to provide a stable operating current for LEDs. Since LEDs are very sensitive to current, too high a current can cause them to be damaged or their lifespan to be shortened, while too low a current cannot guarantee brightness. Therefore, a suitable driver can ensure that the LED works under safe and efficient conditions.
-
2. What is the difference between an LED driver and a ballast?
LED drivers: Designed specifically for LEDs, they are usually used to adjust the output current to meet the requirements of LEDs.
Ballasts: Traditionally used for fluorescent lamps or other gas discharge lamps, they control the high voltage at startup and limit the operating current. Although some modern electronic ballasts can also provide constant current, their original design and application areas are different from LED drivers. -
3. How can I tell if an LED driver is broken?
If the LED does not light up or the brightness drops significantly.
The driver is heating abnormally.
There is a distinct burnt smell.
Measure the input and output voltage/current and it does not meet the specification.
Test the status of its internal components through professional equipment. -
4. Can I use an LED light without a driver?
As mentioned before, in theory yes, but in practice it is strongly recommended to use a proper driver to ensure optimal performance and extend life.
