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MP3388 4.5-25V 50V, 8-String White LED Driver QFN24
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pMPS MP3388 — 50V, 8-String White LED Driver, 4.5-25V input, QFN24./p
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MP3388 4.5-25V 50V, 8-String White LED Driver QFN24
The MPS MP3388 is a 50V, 8-String White LED Driver. It operates from a 4.5 V to 25 V input. It is supplied in a QFN24 package.
The MP3388 is a step-up converter with 8-channel current sources designed for driving the white LED arrays for large size LCD panel backlighting applications.
Key Specifications
| Part Number | MP3388 |
| Function | 50V, 8-String White LED Driver |
| Input Voltage | 4.5 V to 25 V |
| Interface | PWM |
| Package | QFN24 |
| Ordering Codes | MP3388 |
Features
- High Efficiency and Small Size
- 4.5V to 25V Input Voltage Range
- 50V Maximum Step-up Voltage
- Balanced Driver for 8 Strings of WLED
- 3% Current Matching Accuracy Between Strings
- Selectable Switching Frequency: 1.25MHz or 625kHz
- PWM or DC Input Burst PWM Dimming
- Programmable Over-voltage Protection
- Under Voltage Lockout
- Open and Short LED protection
Typical Application Circuit
Applications
- Notebook PC
- Small LCD TV
- Handy Terminals Display
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 MP3388 support?
4.5 V to 25 V.
Which package and ordering codes apply to the MP3388?
QFN24; order codes include MP3388.
What are the defining features of the MP3388?
High Efficiency and Small Size 4.5V to 25V Input Voltage Range
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