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MP3388S 4.3-25V White LED Driver QFN24
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pMPS MP3388S — White LED Driver, 4.3-25V input, QFN24./p
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MP3388S 4.3-25V White LED Driver QFN24
The MPS MP3388S is a White LED Driver. It operates from a 4.3 V to 25 V input. It is supplied in a QFN24 package.
The MP3388S is a step-up converter with 8 current-source channels designed to drive arrays of white LED for LCD-panel backlighting applications.
Key Specifications
| Part Number | MP3388S |
| Function | White LED Driver |
| Input Voltage | 4.3 V to 25 V |
| Interface | PWM |
| Package | QFN24 |
| Ordering Codes | MP3388S |
Features
- High Efficiency
- Compact Size
- 4.3V-to-25V Input Voltage Range
- 55V Maximum Step-Up Voltage
- Balanced Driver for 8 WLED Strings
- 2.5% Current-Matching Accuracy between Strings
- Selectable Switching Frequency of 625kHz or 1.25MHz
- PWM or DC Input-Burst PWM Dimming
- Programmable Over-Voltage Protection
- Under-Voltage Lockout
Typical Application Circuit
Applications
- Notebook PCs
- Tablet Computers
- Small LCD TV
- Handheld Terminal Displays
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 MP3388S support?
4.3 V to 25 V.
Which package and ordering codes apply to the MP3388S?
QFN24; order codes include MP3388S.
What are the defining features of the MP3388S?
High Efficiency Compact Size
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