LM51561-Q1 Texas Instruments Integrated Circuit (Small Outline No-lead) In Stock
The LM51561-Q1 is an AEC-Q100 automotive-grade wide input voltage boost/SEPIC/flyback controller from Texas Instruments supporting up to 65V input. It operates at 2.2 MHz switching frequency with dual random spread spectrum for EMI reduction. Available in compact SON package with global stock for automotive power design.
- Manufacturer
- Texas Instruments
- Package
- Small Outline No-lead
- Pin Count
- 13
- Lifecycle
- ACTIVE
- Datasheet
- LM51561-Q1 Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- AEC-Q100 automotive qualification ensures operation across wide temperature ranges in harsh automotive power systems
- Wide 65V input voltage range supports boost, SEPIC, and flyback topologies from a single controller IC
- 2.2 MHz switching frequency with dual random spread spectrum minimizes EMI interference in sensitive automotive applications
- Non-synchronous control architecture enables simple, cost-effective external component selection for flexible power stage design
Applications
The LM51561-Q1 is designed for automotive power supply systems including LED lighting drivers, infotainment power rails, and ADAS system power management where AEC-Q100 reliability is required. Its support for boost, SEPIC, and flyback topologies makes it versatile for battery-to-bus conversion and isolated power supply designs in 12V and 24V automotive electrical systems. The dual random spread spectrum feature reduces electromagnetic emissions, making it ideal for radio-frequency-sensitive automotive environments.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for LM51561-Q1:
Switching Controller, Current-mode, 15A, 2200kHz Switching Freq-Max, BICMOS, PDSO12
Frequently Asked Questions
What topologies does the LM51561-Q1 support?
The LM51561-Q1 supports non-synchronous boost, SEPIC, and flyback converter topologies, making it a flexible single-device solution for multiple power conversion needs. This versatility allows engineers to use one controller IC across different automotive power supply designs, simplifying BOM management and qualification efforts in automotive programs.
What is the switching frequency and EMI reduction feature of the LM51561-Q1?
The LM51561-Q1 operates at a 2.2 MHz switching frequency and features dual random spread spectrum (RSS) modulation to reduce electromagnetic interference. The high switching frequency enables the use of smaller passive components, while the spread spectrum feature distributes switching noise across a wider frequency band to help meet CISPR 25 automotive EMC requirements.
Is the LM51561-Q1 suitable for automotive applications?
Yes, the LM51561-Q1 is AEC-Q100 qualified and part of Texas Instruments' automotive catalog (indicated by the -Q1 suffix). It is designed for automotive applications including LED lighting drivers, power management in ADAS and infotainment systems, and DC-DC conversion in 12V or 24V vehicle electrical architectures, where AEC-Q100 reliability and wide input voltage capability are required.
What is the maximum input voltage of the LM51561-Q1?
The LM51561-Q1 supports a wide input voltage range with a maximum of 65V, making it suitable for automotive systems with load dump transients and 24V truck electrical architectures. This high voltage tolerance allows designers to build robust power supplies that can withstand voltage spikes commonly seen in automotive battery-connected power rails.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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