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Texas Instruments LM25183QNGURQ1
- Part No.:
- LM25183QNGURQ1
- Manufacturer:
- Texas Instruments
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
LM25183QNGURQ1.pdf
- Description:
- IC REG FLYBACK 12V 600MA 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:5,099
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Product details
Overview
LM25183QNGURQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive primary-side regulated (PSR) flyback DC/DC controller with integrated 65-V, 2.5-A MOSFET, ±1.5% output regulation accuracy, 4.5 V to 42 V input range, and boundary conduction mode (BCM) operation-designed for isolated IGBT/SiC driver supplies in traction inverters.
For engineers reviewing the LM25183QNGURQ1 datasheet, LM25183QNGURQ1 pinout, LM25183QNGURQ1 application, or LM25183QNGURQ1 equivalent, key selection considerations include its single-component isolation barrier architecture, temperature-compensated feedback via TC pin, quasi-resonant switching for CISPR 25 Class 5 EMI compliance, and wettable-flank WSON-8 package for automated optical inspection.
Technical Context
The LM25183QNGURQ1 implements variable-frequency peak current-mode (VFPCM) control with three operating modes: BCM at heavy loads (enabling compact magnetics and ±1.5% regulation), DCM at medium loads (clamped max frequency of 350 kHz), and frequency foldback mode (FFM) below 0.5% load (minimum 12 kHz). Its PSR architecture samples reflected flyback voltage at secondary zero-current crossing, eliminating optocouplers and auxiliary windings.
Internal integration includes a 65-V/0.11-Ω MOSFET, precision 1.21-V RSET reference, thermal shutdown at 175°C with 10°C hysteresis, hiccup-mode overload protection, and programmable EN/UVLO with 1.45–1.53 V enable threshold and 50-mV hysteresis-supporting robust start-up sequencing in automotive HEV/EV powertrain systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 42 V - supports full automotive battery transients including cold-crank (down to 3.5 V post-startup) |
| Output Regulation Accuracy | ±1.5% - total line/load/temperature error budget enables stable 12-V rail for gate drivers without post-regulation |
| Integrated MOSFET | 65-V, 2.5-A, 0.11-Ω - delivers up to 10 W output with headroom for 42-V line surges |
| Switching Frequency Range | 12 kHz to 350 kHz - adaptive VFPCM maintains high efficiency across 0.5%–100% load |
| Junction Temperature Range | –40°C to +150°C - qualified for AEC-Q100 Grade 1 ambient (–40°C to +125°C) |
| EMI Performance | CISPR 25 Class 5 compliant - soft-switching eliminates diode reverse recovery noise |
| Package | 8-pin WSON (4.0 mm × 4.0 mm, 0.8-mm pitch, wettable flanks) - enables AOI-compatible SMT assembly |
Pinout & Package
LM25183QNGURQ1 is housed in an 8-pin WSON-NGU package (4.0 mm × 4.0 mm body, 0.8-mm pin pitch) with wettable flanks for solder-joint inspection. Thermal resistance: RθJA = 40.9°C/W, RθJC(bot) = 2.7°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switch node | Drain of internal 65-V MOSFET; connects directly to primary winding of flyback transformer |
| FB | Primary-side feedback input | Samples reflected flyback voltage at zero-current crossing; sets output via resistor divider with RSET |
| VIN | Power input | Supplies internal bias regulators and senses input voltage; requires low-impedance path to input capacitor |
| EN/UVLO | Enable & UVLO programming | Three-state control: <1 V = shutdown, 1–1.5 V = standby, >1.5 V = active; supports resistor-divider UVLO tuning |
| SS/BIAS | Soft-start or external bias input | 6-ms internal soft-start when open; accepts external capacitor for extended ramp or 4.25–13-V bias supply to reduce IQ |
| TC | Temperature compensation | Adjusts FB setpoint using resistor to RSET to offset thermal drift of flyback diode VF |
| RSET | Reference current setting | 12.1-kΩ to GND sets 100-µA reference current and 1.21-V internal reference for precise output scaling |
| GND | Analog & power ground | Common return for control circuitry and MOSFET source; must be low-inductance connection to PCB ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Primary-side regulation (PSR) | Eliminates optocoupler and auxiliary winding-reduces BOM count, improves reliability, and cuts solution size by >30% |
| Quasi-resonant BCM switching | Enables zero-voltage turn-on and avoids diode reverse recovery loss-critical for CISPR 25 Class 5 EMI compliance |
| Integrated 65-V/2.5-A MOSFET | Supports 10-W output with margin for 42-V automotive transients; eliminates external high-voltage switch and associated gate drive complexity |
| Optional VOUT temperature compensation | TC pin + RSET resistor corrects for flyback diode VF drift-maintains ±1.5% regulation over –40°C to +150°C junction range |
| Functional safety documentation support | Includes FIT rate data, failure mode analysis, and safety manual-enables ISO 26262 ASIL-B system-level certification |
Applications
| Automotive Traction Inverter Driver Supply | HEV/EV On-Board Charger Auxiliary Rail |
|---|---|
Use Scenario: Isolated 12-V supply powering IGBT or SiC gate drivers in high-power traction inverters, exposed to harsh EMI and wide temperature swings. IC Role / Device Role / Timing Role: Primary-side regulated flyback controller managing transformer energy transfer, zero-current detection, and adaptive frequency modulation. Use Value: ±1.5% regulation ensures consistent gate drive voltage under load transients; 65-V MOSFET withstands 42-V bus surges without external clamping. | Use Scenario: Compact isolated DC/DC stage generating bias rails for OBC control logic, communication interfaces, and sensor conditioning circuits. IC Role / Device Role / Timing Role: PSR flyback controller implementing BCM with soft switching to meet stringent CISPR 25 Class 5 conducted/radiated EMI limits. Use Value: No optocoupler or auxiliary winding reduces component count and improves long-term reliability in sealed OBC enclosures. |
| Sub-AM Band Body Electronics | Automotive ADAS Camera Power Module |
Use Scenario: Isolated 5-V or 3.3-V rail for door modules, seat controllers, or lighting ECUs where space and EMI are constrained. IC Role / Device Role / Timing Role: Integrated flyback controller delivering regulated output with minimal external components and no isolation barrier components beyond transformer. Use Value: Wettable-flank WSON-8 package enables automated optical inspection; AEC-Q100 Grade 1 qualification guarantees operation from –40°C to +125°C ambient. | Use Scenario: Isolated power for image sensor bias, lens actuator drivers, and ISP processors in rear-view or surround-view camera systems. IC Role / Device Role / Timing Role: PSR flyback IC providing thermally compensated output voltage to maintain sensor analog performance across vehicle cabin temperature extremes. Use Value: TC pin compensation maintains <±2% output drift from –40°C to +105°C-critical for low-noise analog imaging chains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PSR flyback controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC28911DR | 65-V MOSFET, but rated for 700-V AC input; lacks TC pin, RSET-based reference, and AEC-Q100 qualification | Targeted at universal-input offline SMPS-not optimized for 12–42-V automotive DC input or thermal compensation | Select LM25183QNGURQ1 for automotive-grade PSR with diode thermal compensation and wettable-flank packaging. |
| LM5180QDGQRQ1 | 65-V, 2.5-A MOSFET; supports PSR but requires optocoupler for tight regulation; no TC pin or RSET reference | Designed for higher-power (>15 W), multi-output flyback with tighter regulation needs-adds complexity and cost | Choose LM25183QNGURQ1 when single-output, ultra-compact, optocoupler-free PSR is required below 10 W. |
Compared with UCC28911DR and LM5180QDGQRQ1, LM25183QNGURQ1 uniquely combines AEC-Q100 Grade 1 qualification, integrated TC compensation, RSET-based precision reference, and wettable-flank WSON-8-making it the only option optimized for cost-sensitive, space-constrained, thermally demanding automotive PSR flyback designs under 10 W.
Availability
LM25183QNGURQ1 is available at Aetrix Electronics and suitable for automotive HEV/EV powertrain systems, traction inverter driver supplies, and sub-AM band body electronics requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for LM25183QNGURQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for automotive, industrial, personal electronics, and communications markets.
The LM25183-Q1 product line delivers highly integrated, AEC-Q100-qualified PSR flyback controllers targeting isolated DC/DC conversion in automotive powertrain and body electronics-emphasizing compactness, EMI robustness, and thermal resilience.
FAQ
What is the maximum output power achievable with LM25183QNGURQ1?
The LM25183QNGURQ1 delivers up to 10 W of isolated output power using its integrated 65-V, 2.5-A MOSFET. This rating assumes typical conditions: VIN = 12 V to 24 V, VOUT = 12 V, and proper thermal management per the 40.9°C/W junction-to-ambient rating. At 42-V input, output power is limited by peak current and duty cycle constraints-not MOSFET voltage rating. The LM25183QNGURQ1 datasheet confirms this 10-W capability in Section 3 and Figure 6-1 efficiency curves.
Does LM25183QNGURQ1 require an optocoupler for feedback?
No, LM25183QNGURQ1 does not require an optocoupler. It uses primary-side regulation (PSR) by sampling the reflected flyback voltage at the SW pin during secondary zero-current crossing. This architecture eliminates both the optocoupler and auxiliary transformer winding-reducing component count, improving reliability, and shrinking solution size. The LM25183QNGURQ1 achieves ±1.5% output regulation accuracy without secondary-side sensing components.
How is output voltage set on LM25183QNGURQ1?
Output voltage on LM25183QNGURQ1 is set using two resistors: a feedback resistor (RFB) between SW and FB pins, and a reference-setting resistor (RSET) from RSET pin to GND. With RSET = 12.1 kΩ, the internal 1.21-V reference establishes the scaling ratio. Equation 8 in the LM25183QNGURQ1 datasheet defines VOUT = VREF × (RFB/RSET) × (NPS) + VD, where NPS is the transformer turns ratio and VD is the flyback diode forward voltage. An optional TC pin resistor further compensates for VD temperature drift.
What package type and dimensions does LM25183QNGURQ1 use?
LM25183QNGURQ1 uses an 8-pin WSON package (NGU variant) measuring 4.0 mm × 4.0 mm with 0.8-mm pin pitch and wettable flanks. This package is specified in the device information table and mechanical drawings of the LM25183QNGURQ1 datasheet (SNVSBJ4A). Wettable flanks enable automated optical inspection (AOI) of solder joints-a critical requirement for automotive PCB assembly. Thermal metrics include RθJA = 40.9°C/W and RθJC(bot) = 2.7°C/W.
Is LM25183QNGURQ1 qualified for automotive applications?
Yes, LM25183QNGURQ1 is AEC-Q100 qualified for automotive applications at Grade 1 (–40°C to +125°C ambient temperature range). It also supports functional safety development with documented FIT rate, failure mode analysis, and safety manual-enabling ISO 26262 ASIL-B system-level certification. The LM25183QNGURQ1 datasheet explicitly states AEC-Q100 qualification in Section 1 (Features) and Section 7.1 (Overview), and lists Grade 1 temperature range in the "Device Information" table.
LM25183QNGURQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Flyback
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 12V
- Voltage - Output (Max):
- -
- Current - Output:
- 600mA
- Frequency - Switching:
- 10kHz ~ 350kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WSON (4x4)
LM25183QNGURQ1 FAQ
1.How can I place an order for LM25183QNGURQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM25183QNGURQ1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM25183QNGURQ1 reliable?
The price and inventory of LM25183QNGURQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM25183QNGURQ1 is usually 5 days.
3.What payment methods are accepted for LM25183QNGURQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM25183QNGURQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM25183QNGURQ1?
LM25183QNGURQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM25183QNGURQ1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM25183QNGURQ1?
For technical support, including LM25183QNGURQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM25183QNGURQ1 requirements.
6.How does Aetrix verify that LM25183QNGURQ1 is sourced from the original manufacturer or authorized distributors?
All LM25183QNGURQ1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM25183QNGURQ1 meets industry standards.
7.What is the process for return or replacement of LM25183QNGURQ1?
All LM25183QNGURQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM25183QNGURQ1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM25183QNGURQ1 part is unused and in its original packaging.
Return procedure for LM25183QNGURQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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