SC4540ULTRT vs LM3533TMX-40/NOPB
| Part Number |
|
|
| Category | PMIC - LED Drivers | PMIC - LED Drivers |
| Manufacturer | Semtech Corporation | Texas Instruments |
| Description | IC LED DRVR RGLTR DIM 30MA 8MLPD | IC LED DRIVER RGLTR DIM 20USMD |
| Package | Tape & Reel (TR) | Tape & Reel (TR) |
| Series | - | - |
| 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 | 8-UFDFN Exposed Pad | 20-WFBGA, DSBGA |
| Supplier Device Package | 8-MLPD-UT (2x2) | 20-DSBGA |
| Topology | Step-Up (Boost) | Step-Up (Boost), Switched Capacitor (Charge Pump) |
| Applications | Backlight | Backlight |
| Number of Outputs | 1 | 7 |
| Voltage - Output | 5V ~ 38V | 40V |
| Frequency | 800kHz | 500kHz, 1MHz |
| Current - Output / Channel | 30mA | 30mA |
| Internal Switch(s) | Yes | Yes |
| Dimming | PWM | PWM |
| Voltage - Supply (Max) | 12V | 5.5V |
| Voltage - Supply (Min) | 2.8V | 2.7V |
-
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.
-
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.
-
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.
