SC653ULTRT vs LM3533TMX-40/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. 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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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.
