SC653ULTRT vs LM3550SPX/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 DVR CTRLR DIM 5A 20UQFN |
| Package | Tape & Reel (TR) | Bulk |
| Series | SemPulse® | - |
| Type | DC DC Regulator | DC DC Controller |
| Operating Temperature | -40°C ~ 85°C (TA) | -30°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 18-UFQFN Exposed Pad | 20-UFQFN Exposed Pad |
| Supplier Device Package | 18-MLPQ-UT (2.3x2.3) | 20-UQFN (3x2.5) |
| Topology | Switched Capacitor (Charge Pump) | Switched Capacitor (Charge Pump) |
| Applications | Backlight | Camera Flash |
| Number of Outputs | 4 | 1 |
| Voltage - Output | 2.5V ~ 5.25V | 5.3V |
| Frequency | 250kHz | 1MHz |
| Current - Output / Channel | 25mA | 5A (Flash) |
| Internal Switch(s) | Yes | No |
| Dimming | - | I²C |
| Voltage - Supply (Max) | 5.5V | 5.5V |
| Voltage - Supply (Min) | 2.9V | 2.7V |
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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. 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. 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.
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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.
