LM3431QMHX/NOPB vs LM3431AMHX/NOPB
| Part Number |
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| Category | PMIC - LED Drivers | PMIC - LED Drivers |
| Manufacturer | Texas Instruments | National Semiconductor |
| Description | IC LED DRIVER CTRLR DIM 28HTSSOP | LM3431 3-CHANNEL CONSTANT CURREN |
| Package | Tape & Reel (TR) | Bulk |
| Series | Automotive, AEC-Q100 | - |
| Type | DC DC Controller | DC DC Controller |
| Operating Temperature | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 28-PowerTSSOP (0.173\", 4.40mm Width) | 28-PowerTSSOP (0.173\", 4.40mm Width) |
| Supplier Device Package | 28-HTSSOP | 28-HTSSOP |
| Topology | Step-Up (Boost) | Step-Up (Boost) |
| Applications | Backlight | Backlight |
| Number of Outputs | 3 | 3 |
| Voltage - Output | - | - |
| Frequency | 1MHz | 1MHz |
| Current - Output / Channel | - | - |
| Internal Switch(s) | No | No |
| Dimming | Analog, PWM | Analog, PWM |
| Voltage - Supply (Max) | 36V | 36V |
| Voltage - Supply (Min) | 4.5V | 4.5V |
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1. Is an LED driver just a power supply?
Not exactly. Although the LED driver does provide power, it is more than just a simple power converter. It also contains complex circuits to accurately control the output voltage and current, and sometimes includes dimming, temperature protection and other functions.
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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. 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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4. 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.
