TPS92641PWPR/NOPB vs SC644ULTRT
| Part Number |
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| Category | PMIC - LED Drivers | PMIC - LED Drivers |
| Manufacturer | Texas Instruments | Semtech Corporation |
| Description | IC LED DRIVER CTRLR DIM 16HTSSOP | IC LED DRIVER RGLTR 25MA 20MLPQ |
| Package | Tape & Reel (TR) | Tape & Reel (TR) |
| Series | - | SemPulse® |
| Type | DC DC Controller | DC DC Regulator |
| Operating Temperature | -40°C ~ 125°C (TJ) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 16-PowerTSSOP (0.173\", 4.40mm Width) | 20-VFQFN Exposed Pad |
| Supplier Device Package | 16-HTSSOP | 20-MLPQ-UT (3x3) |
| Topology | Step-Down (Buck) | Switched Capacitor (Charge Pump) |
| Applications | Automotive, Lighting | Backlight |
| Number of Outputs | 1 | 6 |
| Voltage - Output | - | 2.5V ~ 5.25V |
| Frequency | 1MHz | - |
| Current - Output / Channel | - | 25mA |
| Internal Switch(s) | No | Yes |
| Dimming | Analog, PWM | - |
| Voltage - Supply (Max) | 85V | 5.5V |
| Voltage - Supply (Min) | 7V | 2.9V |
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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. 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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3. Do all LED lights need a driver?
Not all LED lights require independent drivers. Some small or integrated LED lamps may already have built-in driver circuits. However, for most high-power LEDs or applications that require specific current control, using a dedicated driver is very necessary.
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4. Why do I need to program an LED driver?
Programming is usually for advanced drivers with programmable functions, such as achieving finer dimming control, color adjustment or other intelligent functions. This allows users to customize the behavior of the driver according to specific needs.
