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Product Detailed Parameters
- Description：LM5185QPWPRQ1
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Type：Transistor Driver
- Function：Step-Up/Step-Down
- Output Configuration：Positive
- Topology：Flyback
- Number of Outputs：1
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：4.5V ~ 14V
- Frequency - Switching：11kHz ~ 350kHz
- Duty Cycle (Max)：80%
- Synchronous Rectifier：Yes
- Clock Sync：No
- Serial Interfaces：-
- Control Features：Enable, Soft Start
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：14-PowerTSSOP (0.173", 4.40mm Width)
- Supplier Device Package：14-HTSSOP
- Grade：-
- Qualification：-
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Overview
The LM5185QPWPRQ1 is an automotive-grade primary-side regulated (PSR) flyback controller designed for isolated DC-DC conversion. It operates with a wide input voltage range of 4.5 V to 100 V and supports a fixed switching frequency of 350 kHz. The device utilizes a HTSSOP-14 package and functions within a temperature range of -40°C to +125°C. Key electrical specifications include a quiescent current of 425 µA and compliance with AEC-Q100 standards for automotive applications.
Feature Summary
- Integrates primary-side regulation to eliminate optocouplers and secondary feedback components
- Supports external MOSFET configuration for flexible power stage design
- Includes shutdown functionality for system power management
Applications
- Automotive isolated power supplies
- Battery charger auxiliary power stages
- Vehicle infotainment system isolation
Procurement Notes
Verify the complete part number including suffixes against official Texas Instruments documentation to ensure correct packaging and tape-and-reel specifications. Confirm that the component meets specific automotive qualification requirements for your target application environment before finalizing procurement decisions.
Selection Notes
Select this controller when designing isolated flyback converters requiring wide input voltage ranges up to 100 V. Ensure the design accommodates the 350 kHz switching frequency and verify that the HTSSOP-14 thermal performance meets the system's heat dissipation requirements under maximum load conditions.
Part Context
This component belongs to the LM5185 family of PSR flyback controllers manufactured by Texas Instruments. It is specifically qualified for automotive use, distinguishing it from standard industrial variants through rigorous reliability testing and extended temperature operation capabilities defined in the automotive product specification.
Replacement Considerations
Consult the official datasheet for direct pin-to-pin compatible alternatives within the LM5185 series. Verify functional equivalence regarding switching frequency and control loop characteristics before substituting.
