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Product Detailed Parameters
- Description：IC LED DRV CTRL PWM 60MA 28TSSOP
- Series：-
- Mfr：Monolithic Power Systems Inc.
- Package：Tube
- Type：DC DC Controller
- Topology：Step-Up (Boost)
- Internal Switch(s)：No
- Number of Outputs：12
- Voltage - Supply (Min)：5V
- Voltage - Supply (Max)：28V
- Voltage - Output：-
- Current - Output / Channel：60mA
- Frequency：-
- Dimming：PWM
- Applications：Backlight
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：28-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Supplier Device Package：28-TSSOP-EP
- Grade：-
- Qualification：-
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Overview
The MP3389EF-LF is a monolithic boost controller designed for driving white LED arrays in large LCD panel backlights. It features twelve internal current sources with 2.5% matching accuracy and supports up to 60mA per string. The device operates from a 5V to 28V input, stepping up to drive multiple series strings. Key electrical parameters include a 590 kHz switching frequency, 28V maximum supply voltage, and operation within a -40°C to +125°C temperature range. It utilizes a TSSOP-28 package.
Feature Summary
- Integrates twelve independent current sources for balanced LED string regulation
- Supports PWM dimming via external signals or internal generation
- Includes comprehensive protection against open LEDs, short circuits, and overvoltage
- Utilizes low average feedback voltage to enhance system efficiency
Applications
- Large LCD panel backlighting systems
- White LED array drivers
- High-efficiency lighting control modules
Procurement Notes
Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for end-of-life notices, as availability may be limited. Ensure the specific suffix matches the required packaging format. Validate that the operating temperature range meets the target application requirements before finalizing procurement decisions.
Selection Notes
Select this component for applications requiring high channel count and precise current matching without individual per-channel programming. It is suitable for designs needing a fixed boost topology with adjustable switching frequency. Consider thermal management due to power dissipation in dense PCB layouts. Verify that the external MOSFET selection aligns with the 28V output capability and current requirements.
Part Context
This part belongs to the MP3389 family of LED lighting drivers from Monolithic Power Systems. It is specifically engineered for high-channel-count WLED applications. The EF suffix denotes the TSSOP-28 package variant. It serves as a specialized solution for display backlighting where uniformity and efficiency are critical design constraints.
Replacement Considerations
MP3389EF-LF-Z is a compatible reel-packaged variant of the same functional device. Other MP3389 variants exist with different package options such as SOIC-28EP. Cross-referencing pinouts and electrical specifications is essential when substituting with non-MPS components.
FAQ
How is the switching frequency determined?
The switching frequency is set by an external resistor connected to the device.
What is the current matching accuracy between LED strings?
The internal current sources provide a matching accuracy of 2.5% across all twelve channels.
