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MP4688 4.5-80V, 1A, 2MHz High Power LED Driver SOIC8
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pMPS MP4688 — High Power LED Driver, 4.5-80V input, 1 A output, SOIC8, AEC-Q100./p
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MP4688 4.5-80V, 1A, 2MHz High Power LED Driver SOIC8
The MPS MP4688 is a High Power LED Driver. It operates from a 4.5 V to 80 V input, is rated for 1 A and switches at 2 MHz. It is supplied in a SOIC8 package. The part is AEC-Q100 qualified.
The MP4688 is a high voltage input step-down switching regulator to deliver a constant current of up to 1A to high power LEDs.
Key Specifications
| Part Number | MP4688 |
| Function | High Power LED Driver |
| Input Voltage | 4.5 V to 80 V |
| Current Rating | 1 A |
| Switching Frequency | 2 MHz |
| Quiescent Current | 170 µA |
| Interface | PWM |
| Peak Efficiency | 95% |
| Package | SOIC8 |
| Qualification | AEC-Q100 |
| Ordering Codes | MP4688 |
Features
- Wide 4.5V to 80V Operating Input Range
- No Output Capacitor Required
- ±5% LED Current Accuracy
- Hysteretic Control: No Compensation
- Up to 2MHz Switching Frequency
- Up to 20kHz Dimming Frequency
- Dedicated PWM Dimming Control Input
- Short circuit protection with integrated high side MOSFET
- Thermal shut down
- 200mV reference voltage for high efficiency
Typical Application Circuit
Applications
- High Power LED Driver
- Automotive, Industry and General Lighting
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 MP4688 support?
4.5 V to 80 V. The rated output is 1 A.
Which package and ordering codes apply to the MP4688?
SOIC8; order codes include MP4688.
What are the defining features of the MP4688?
Wide 4.5V to 80V Operating Input Range No Output Capacitor Required
Is the MP4688 qualified for automotive designs?
Yes — it is AEC-Q100 qualified. Confirm the grade against the qualification summary in the datasheet before specifying it on a safety-related rail.
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