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Product Detailed Parameters
- Description：2.2-MHZ WIDE VIN 1.5-A MOSFET D
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Type：Transistor Driver
- Function：Step-Up, Step-Up/Step-Down
- Output Configuration：Positive
- Topology：Boost, Flyback, SEPIC
- Number of Outputs：1
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：2.97V ~ 16V, 3.5V ~ 45V
- Frequency - Switching：100kHz ~ 2.2MHz
- Duty Cycle (Max)：93%
- Synchronous Rectifier：No
- Clock Sync：Yes
- Serial Interfaces：-
- Control Features：Current Limit, Enable, Frequency Control, Power Good, Soft Start, Sync
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：12-WFDFN Exposed Pad
- Supplier Device Package：12-WSON (3x2)
- Grade：Automotive
- Qualification：AEC-Q100
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Overview
The LM5155QUDSSRQ1 is an automotive-grade, non-synchronous boost controller from Texas Instruments. It supports Boost, SEPIC, and Flyback topologies using peak current mode control. The device operates with a wide input voltage range of 3.5 V to 45 V. It features a switch frequency adjustable between 100 kHz and 2.2 MHz. The component is housed in a 12-WSON (3x2) package. It meets AEC-Q100 standards for automotive applications.
Feature Summary
- Supports Boost, SEPIC, and Flyback converter topologies
- Utilizes peak current mode control architecture
- Enables clock synchronization for noise management
- Includes programmable soft-start functionality
Applications
- Automotive traction inverter auxiliary power supplies
- LED lighting systems requiring isolated outputs
- Industrial DC-DC conversion modules
- PoE powered device intermediate bus converters
Procurement Notes
Verify the specific suffix 'QUDSSRQ1' against the official datasheet to confirm the exact tape-and-reel quantity and moisture sensitivity level. Ensure the ordering part number matches the required temperature grade and packaging format. Cross-reference the manufacturer's latest revision history to validate component availability and compliance status before finalizing procurement orders.
Selection Notes
Select this controller when designing isolated or non-isolated converters requiring wide input voltage ranges up to 45 V. It is suitable for applications needing flexible topology support including flyback and SEPIC configurations. Consider the external MOSFET driver capability and the 2.2 MHz maximum switching frequency for optimizing passive component size in space-constrained designs.
Part Context
This component belongs to the LM5155 family of wide VIN controllers designed for robust performance in demanding environments. The Q1 suffix indicates it is qualified for automotive use under AEC-Q100 standards. The series provides solutions for high-efficiency power conversion in electric vehicles and industrial machinery.
Replacement Considerations
Consult the LM5155 datasheet for direct pin-compatible alternatives within the same family. Verify that any substitute maintains the required 45 V input rating and AEC-Q100 qualification if automotive reliability is mandatory.
FAQ
Does the LM5155QUDSSRQ1 support synchronous rectification?
No, the LM5155QUDSSRQ1 is a non-synchronous controller that drives external N-channel MOSFETs.
What is the maximum operating junction temperature?
The maximum operating junction temperature is 150°C.
