SC4540ULTRT vs PCA9533D/02,118
| Part Number |
|
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| Category | PMIC - LED Drivers | PMIC - LED Drivers |
| Manufacturer | Semtech Corporation | NXP USA Inc. |
| Description | IC LED DRVR RGLTR DIM 30MA 8MLPD | IC LED DRIVER LIN DIM 25MA 8SO |
| Package | Tape & Reel (TR) | Tape & Reel (TR) |
| Series | - | - |
| Type | DC DC Regulator | Linear |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 8-UFDFN Exposed Pad | 8-SOIC (0.154\", 3.90mm Width) |
| Supplier Device Package | 8-MLPD-UT (2x2) | 8-SO |
| Topology | Step-Up (Boost) | - |
| Applications | Backlight | Backlight |
| Number of Outputs | 1 | 4 |
| Voltage - Output | 5V ~ 38V | - |
| Frequency | 800kHz | 400kHz |
| Current - Output / Channel | 30mA | 25mA |
| Internal Switch(s) | Yes | Yes |
| Dimming | PWM | I²C, SMBus |
| Voltage - Supply (Max) | 12V | 5.5V |
| Voltage - Supply (Min) | 2.8V | 2.3V |
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1. 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. -
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. 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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4. Are there LED drivers with audio output?
Some high-end LED drivers do have the ability to synchronize with audio signals and change the lighting effects to the rhythm of music. This type of driver is usually used in occasions such as entertainment lighting or stage lighting.
