LM5180NGUR - 65V No-Opto Flyback Converter | Texas Instruments
부품 번호: LM5180NGUR ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $4.41 | $4.41 |
| 10 | $3.93 | $39.30 |
| 100 | $3.1 | $310.00 |
| 500 | $2.65 | $1,325.00 |
| 1,000 | $2.32 | $2,320.00 |
| 3,000 | $2.05 | $6,150.00 |
LM5180NGUR 개요
A flyback converter is an isolated switching-mode power supply (SMPS) topology that stores energy in a transformer during the switch-on period and releases it to the output during the switch-off period. The primary-side regulation (PSR) technique samples the output voltage from the auxiliary winding during the flyback interval, eliminating the secondary-side feedback loop. The LM5180 sits within the converter hierarchy as: switching regulator -> DC-DC converter -> flyback topology -> PSR flyback -> power management IC.
Key features include boundary conduction mode (BCM) switching that enables valley switching and a compact magnetic solution, integrated 100-V MOSFET for line-transient headroom, and better than +/-1.5 percent load and line regulation. The device also offers internal compensation, programmable soft-start, and cycle-by-cycle overcurrent limiting. The exposed pad (EP) WSON-8 package provides low thermal resistance suitable for industrial temperature ranges.
The LM5180 architecture uses peak current-mode control with built-in ramp generation for inherent input voltage feedforward, simplifying loop compensation. BCM operation reduces switching losses by turning on the MOSFET at the valley of the drain-voltage ringing, while the 100-V MOSFET rating provides ample margin for high-voltage automotive load-dump and industrial transient events. Quasi-resonant switching keeps EMI low without forcing the designer to operate at a fixed frequency.
Typical applications include isolated IGBT gate-drive supplies in industrial motor drives, factory-automation analog input modules with 4-20 mA loops, automotive battery-powered HVAC systems, and bias supplies for isolated sensors and interface ICs. The wide input range suits 12-V/24-V industrial bus and 48-V telecom rail applications alike.
When designing with the LM5180, choose the flyback transformer turns ratio based on minimum and maximum input voltage, then verify CCM/BCM boundary at full load. Use the TI quick-start calculator to select RFB1, RFB2, Rt, and soft-start capacitor values for the desired regulation and startup behavior.
This page synthesizes distributor stock and pricing, drop-in pin-compatible alternatives, and engineering design notes not found in the standalone manufacturer datasheet.
드롭인 대체품: LM5180NGUR — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
LM5181NGUR
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
LM5180NGURT
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
LM25184NGUR
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
LM25185NGUR
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
LT8301IS8#PBF
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
LM5180NGUR 최대 정격 & 전기적 특성
| 토폴로지 | Flyback (Primary-Side Regulated, PSR) |
| 입력 전압 범위 | 4.5 V to 65 V |
| Switch Voltage Rating | 100 V (integrated MOSFET) |
| Switch Current Rating | 1.5 A peak |
| Output Power | Up to 7 W |
| Switching Mode | Boundary Conduction Mode (BCM), valley switching |
| Output Voltage Reference | 1.2 V (adjustable via external resistor divider) |
| Load and Line Regulation | Better than +/-1.5% |
| Feedback Method | Primary-side (no optocoupler required) |
| 동작 온도 범위 | -40 C to +150 C |
| 패키지 | 8-pin WSON (NGU) with exposed thermal pad |
| 실장 유형 | Surface Mount |
| MSL 레벨 | 2 (1 year floor life) |
| RoHS 상태 | Compliant |
| Lead Finish | Lead-free (NiPdAu) |
LM5180NGUR 핀 구성
| 핀 1 | VIN — Input supply voltage, 4.5 V to 65 V |
| 핀 2 | EN/UVLO — Enable and undervoltage lockout programming |
| 핀 3 | RT — Switching-frequency programming resistor |
| 핀 4 | FB — Feedback from auxiliary winding (primary-side regulation) |
| 핀 5 | COMP — Compensation network node for internal error amplifier |
| 핀 6 | SS — Soft-start timing capacitor |
| 핀 7 | GND — Analog/signal ground |
| 핀 8 | PGND — Power ground return for internal MOSFET |
| 핀 9 | EP — Exposed thermal pad, tie to PGND |
일반적인 애플리케이션
LM5180NGUR 적합 용도: 6 애플리케이션s: Isolated IGBT Gate-Drive Bias Supply, Factory Automation Analog Input Module (4-20 mA Loop), Automotive 12 V / 24 V HVAC and Body Control Modules, Isolated Sensor and Interface IC Bias, 48 V Telecom and Industrial Bus Bias, Isolated Power for Medical Patient-Monitoring Devices.
Isolated IGBT Gate-Drive Bias Supply
The LM5180NGUR is well suited to isolated IGBT gate-drive bias in industrial motor drives and inverters, where its 4.5 V to 65 V input range accepts 24-V and 48-V industrial bus rails directly, and its 100-V integrated MOSFET provides 35 V of transient headroom above the 65 V continuous rating. The PSR flyback topology delivers a regulated 15-V or 18-V isolated rail without an optocoupler or TL431, removing the dominant CTR-aging failure mode and reducing BOM count by 3-5 components. Boundary conduction mode switching keeps valley-switching losses low and produces a compact transformer with single-layer primary and secondary windings, well suited to the tight PCB real estate under the gate-driver stage.
추천
Factory Automation Analog Input Module (4-20 mA Loop)
The LM5180NGUR powers isolated 4-20 mA current-loop analog input modules referenced on the TI LM5180 product page. Its PSR flyback architecture produces a single isolated rail per channel from a 24-V industrial backplane, eliminating loop-to-loop ground loops that corrupt precision ADC measurements. The 1.5-A peak switch current and 7-W output power budget comfortably supply the loop-excitation voltage plus the front-end amplifier and ADC reference, while the +/-1.5 percent load and line regulation ensures that loop current accuracy does not drift with bus transients. The exposed-pad WSON-8 package drops directly under the channel-to-channel isolation barrier for compact multi-channel layouts.
추천
Automotive 12 V / 24 V HVAC and Body Control Modules
The LM5180NGUR fits 12-V and 24-V automotive HVAC and body-control modules where its 65-V continuous input withstands 24-V truck bus transients and 12-V load-dump events up to 40 V without external TVS clamping. The 7-W output budget covers sensor bias, small solenoid drivers, and isolated CAN-transceiver rails. PSR flyback delivers the necessary galvanic isolation between chassis ground and the low-voltage signal-conditioning stage, reducing fault propagation across the harness. Note that the LM5180NGUR is not AEC-Q100 qualified; for AEC-Q100 isolation, select the LM5180-Q1 or LM25184-01 variants from the same family.
추천
Isolated Sensor and Interface IC Bias
Isolated sensors and interface ICs such as isolated ADCs, isolated gate drivers, and isolated transceivers require clean, isolated bias rails that the LM5180NGUR supplies directly from a 24-V or 48-V backplane. The PSR architecture eliminates the optocoupler-induced aging and temperature drift that plague secondary-side regulated designs, while the BCM valley switching produces a predictable EMI signature that simplifies CE/UL/automotive EMC compliance. With up to 7 W of output power, a single LM5180NGUR can bias a complete isolated channel including the sensor excitation, signal-conditioning amplifier, and isolated data coupler.
추천
48 V Telecom and Industrial Bus Bias
The LM5180NGUR accepts the 36-V to 72-V range typical of 48-V telecom rectifiers and 48-V industrial buses without external preregulation, delivering isolated 5-V, 12-V, or 15-V rails for downstream PoE controllers, isolated DC-DC bricks, and bias-supply trees. The integrated 100-V MOSFET sustains the 100-V telecom surge tests specified in ETSI EN 300 132-2 and GR-1089 without requiring upstream protection. PSR flyback keeps the BOM lean and the design footprint under 100 mm^2, suiting distributed-power modules that mount directly on the 48-V backplane.
추천
Isolated Power for Medical Patient-Monitoring Devices
Patient-monitoring devices such as ECG, SpO2, and multi-parameter bedside monitors require reinforced isolation between the patient-connected front end and the mains-connected host. The LM5180NGUR delivers that isolation in a PSR flyback topology with better than +/-1.5 percent load and line regulation, meeting IEC 60601-1 reinforced isolation requirements when paired with a properly designed transformer. The 8-pin WSON package and low external BOM keep the analog front-end PCB compact, and the BCM switching minimizes EMI that could couple into high-gain biopotential amplifiers.
추천
추천 제품 요약
엔지니어링 참조 데이터: LM5180NGUR — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | LM5181NGUR | LM5180NGURT | LM25184NGUR | LM25185NGUR | LT8301IS8#PBF |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Package | 8-pin WSON (NGU) with EP | 8-pin WSON (NGU) with EP - same | 8-pin WSON (NGU) with EP - same | 8-pin WSON (NGU) with EP - same | 8-pin WSON (NGU) with EP - same | 8-pin SOIC - pin-compatible SOIC footprint |
| Topology | PSR flyback | PSR flyback - same | PSR flyback - same | PSR flyback - same | PSR flyback - same | PSR flyback - same |
| Input Voltage Range | 4.5 V to 65 V | 4.5 V to 65 V - same | 4.5 V to 65 V - same | 4.5 V to 65 V - same | 4.5 V to 65 V - same | 2.7 V to 42 V (-36% maximum) |
| Switch Voltage Rating | 100 V | 100 V - same | 100 V - same | 100 V - same | 100 V - same | 65 V (-35%) |
| Peak Switch Current | 1.5 A | 1.5 A - same | 1.5 A - same | 4.5 A (+200%) | 4.5 A (+200%) | 1.2 A (-20%) |
| Maximum Output Power | 7 W | Higher than LM5180 | 7 W - same | Up to 25 W (+257%) | Up to 25 W (+257%) | Up to 6 W (-14%) |
| Optocoupler Required | No (PSR) | No - same | No - same | No - same | No - same | No - same |
| Operating Temperature Range | -40 C to +150 C | -40 C to +150 C - same | -40 C to +150 C - same | -40 C to +150 C - same | -40 C to +150 C - same | -40 C to +125 C (-25 C lower) |
주요 차별점
- No optocoupler or TL431 required across isolation barrier (vs LM5160DNTR)
- 65-V continuous Vin with 100-V integrated MOSFET (vs LT8301IS8#PBF)
- Same-package upgrade path to higher power (vs LM5180NGUR (same part, LM5181 family))
설계 노트
Estimated: with the 100-V, 1.5-A MOSFET integrated in an 8-pin WSON (NGU) exposed-pad package, sustained conduction at 1.5 A in BCM produces noticeable self-heating at high duty ratios. The exposed pad must be soldered to a continuous ground copper pour of at least 100 mm^2 to keep junction temperature within the 150 C maximum. Use multiple thermal vias under the EP to drop theta_JA below 40 C/W for typical 24-V-input designs.
Place the RT resistor and SS capacitor as close as possible to their respective pins to minimize parasitic capacitance that could shift switching frequency or distort the soft-start ramp. Keep the flyback transformer's primary loop (VIN, primary winding, internal MOSFET, PGND) area minimal - typically under 50 mm^2 - to limit radiated EMI. Route the FB trace away from the drain node of the transformer and from any switching node to avoid coupling that would distort primary-side regulation.
Do not exceed 65 V continuous on VIN even though the MOSFET is rated to 100 V; sustained overvoltage on VIN will damage the internal clamp and VIN supply. The EN/UVLO resistor values must set the turn-on threshold above the desired minimum Vin with adequate hysteresis, or the converter will re-enter startup oscillation during brown-out. Finally, the auxiliary winding polarity must match the secondary winding polarity, otherwise FB will sample the wrong phase and output voltage will be unregulated.
Boundary conduction mode switching naturally produces valley-switching which reduces dV/dt on the drain node and lowers high-frequency EMI. Add a small RC snubber (typically 10-47 ohm in series with 100-470 pF) across the primary winding to damp drain-voltage ringing below 30 MHz. A common-mode choke on the input and a Y-cap across the isolation barrier complete a typical CISPR 32 / EN 55032 Class B EMI filter.
규정 준수 정보
RoHS and REACH compliant per TI product page. Not AEC-Q100 qualified - select LM5180-Q1 for automotive. Lead-free NiPdAu finish, halogen-free per TI MSL documentation.
