SC653ULTRT vs LM3533TMX-40A/NOPB
| Part Number |
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| Category | PMIC - LED Drivers | PMIC - LED Drivers |
| Manufacturer | Semtech Corporation | Texas Instruments |
| Description | IC LED DRIVER RGLTR 25MA 18MLPQ | IC LED DRIVER RGLTR DIM 20USMD |
| Package | Tape & Reel (TR) | Tape & Reel (TR) |
| Series | SemPulse® | - |
| Type | DC DC Regulator | DC DC Regulator |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 125°C (TJ) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 18-UFQFN Exposed Pad | 20-WFBGA, DSBGA |
| Supplier Device Package | 18-MLPQ-UT (2.3x2.3) | 20-DSBGA |
| Topology | Switched Capacitor (Charge Pump) | Step-Up (Boost), Switched Capacitor (Charge Pump) |
| Applications | Backlight | Backlight |
| Number of Outputs | 4 | 7 |
| Voltage - Output | 2.5V ~ 5.25V | 40V |
| Frequency | 250kHz | 500kHz, 1MHz |
| Current - Output / Channel | 25mA | 30mA |
| Internal Switch(s) | Yes | Yes |
| Dimming | - | PWM |
| Voltage - Supply (Max) | 5.5V | 5.5V |
| Voltage - Supply (Min) | 2.9V | 2.7V |
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1. 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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2. 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.
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3. 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.
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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.
