SC653ULTRT vs STP16DPPS05TTR
| Part Number |
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| Category | PMIC - LED Drivers | PMIC - LED Drivers |
| Manufacturer | Semtech Corporation | STMicroelectronics |
| Description | IC LED DRIVER RGLTR 25MA 18MLPQ | IC LED DRIVER LIN 40MA 24TSSOP |
| Package | Tape & Reel (TR) | Cut Tape (CT) |
| Series | SemPulse® | - |
| Type | DC DC Regulator | Linear |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 125°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 18-UFQFN Exposed Pad | 24-TSSOP (0.173\", 4.40mm Width) |
| Supplier Device Package | 18-MLPQ-UT (2.3x2.3) | 24-TSSOP |
| Topology | Switched Capacitor (Charge Pump) | Shift Register |
| Applications | Backlight | - |
| Number of Outputs | 4 | 16 |
| Voltage - Output | 2.5V ~ 5.25V | 20V |
| Frequency | 250kHz | 30MHz |
| Current - Output / Channel | 25mA | 40mA |
| Internal Switch(s) | Yes | Yes |
| Dimming | - | - |
| Voltage - Supply (Max) | 5.5V | 5.5V |
| Voltage - Supply (Min) | 2.9V | 3V |
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1. 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. -
2. Is an LED driver just a power supply?
Not exactly. Although the LED driver does provide power, it is more than just a simple power converter. It also contains complex circuits to accurately control the output voltage and current, and sometimes includes dimming, temperature protection and other functions.
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3. Can I run an LED without a driver?
Yes, but additional circuits (such as resistors) are required to limit the current. However, this method is less efficient and difficult to maintain a stable current, which may lead to poor LED performance or shortened life.
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4. Does an LED strip require an LED driver?
Yes, LED strips usually require a suitable driver to provide the correct voltage and current. Especially for long strips, because they are often composed of multiple small LEDs in series or parallel.
