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MP2481 4.5-36V, 1.2A, 1.4MHz White LED Driver MSOP8
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pMPS MP2481 — White LED Driver, 4.5-36V input, 1.2 A output, MSOP8./p
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MP2481 4.5-36V, 1.2A, 1.4MHz White LED Driver MSOP8
The MPS MP2481 is a White LED Driver. It operates from a 4.5 V to 36 V input, is rated for 1.2 A and switches at 1.4 MHz. It is supplied in a MSOP8 package.
The MP2481 is a 36V, 1.2A, white LED driver suitable for either step-down or inverting step-up/down applications.
Key Specifications
| Part Number | MP2481 |
| Function | White LED Driver |
| Input Voltage | 4.5 V to 36 V |
| Current Rating | 1.2 A |
| Switching Frequency | 1.4 MHz |
| Interface | PWM |
| Peak Efficiency | 95% |
| Package | MSOP8 |
| Ordering Codes | MP2481 |
Features
- 1.2A Maximum Output Current
- Unique Step-up/down Operation (Buck- Boost Mode)
- Wide 4.5V to 36V Operating Input Range for Step-Down Applications (Buck Mode)
- 0.30Ω Internal Power MOSFET Switch
- Fixed 1.4MHz Frequency
- Analog and PWM Dimming
- 0.2V Reference Voltage
- Up to 95% Efficiency
- 5μA Shutdown Mode
- No minimum LED required
Typical Application Circuit
Applications
- General LED Illuminations
- LCD Backlight Panels
- Handheld Computers
- Automotive Internal Lighting
- Portable Multimedia Players
Design Notes
- Channel-to-channel current matching sets backlight uniformity; check the matching spec at the current you will actually run.
- In boost topologies the OVP threshold must clear the worst-case forward voltage of the longest string, including temperature and binning spread.
- Keep PWM dimming above 200 Hz to stay clear of visible flicker, and away from the audio band if the product has a speaker.
- Size the inductor and output capacitor for the string current ripple, not the total LED current.
Common Questions
What input voltage does the MP2481 support?
4.5 V to 36 V. The rated output is 1.2 A.
Which package and ordering codes apply to the MP2481?
MSOP8; order codes include MP2481.
What are the defining features of the MP2481?
1.2A Maximum Output Current Unique Step-up/down Operation (Buck- Boost Mode)
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