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Texas Instruments LM5180-Q1 | Demoboard LM5180EVM-DUAL
Automotive 65-VIN PSR flyback converter with 100-V, 1.5-A integrated power MOSFET
Overview
| Topology | Flyback Converter |
| Input voltage | 10-65 V |
| Switching frequency | 350 kHz |
| Output 1 | -7.7 V / 0.2 A |
| Output 2 | 15 V / 0.2 A |
Description
The LM5180-Q1 is a primary-side regulated (PSR) flyback converter with high efficiency over a wide input voltage range of 4.5 V to 65 V. The isolated output voltage is sampled from the primary-side flyback voltage, eliminating the need for an optocoupler, voltage reference, or third winding from the transformer for output voltage regulation. The high level of integration results in a simple, reliable and high-density design with only one component crossing the isolation barrier. Boundary conduction mode (BCM) switching enables a compact magnetic solution and better than ±1.5% load and line regulation performance. An integrated 100-V power MOSFET provides output power up to 7 W with enhanced headroom for line transients.The LM5180-Q1 converter simplifies implementation of isolated DC/DC supplies with optional features to optimize performance for the target end equipment. The output voltage is set by one resistor, while an optional resistor improves output voltage accuracy by negating the thermal coefficient of the flyback diode voltage drop. Additional features include an internally-fixed or externally-programmable soft start, optional bias supply connection for higher efficiency, precision enable input with hysteresis for adjustable line UVLO, hiccup-mode overload protection, and thermal shutdown protection with automatic recovery.The LM5180-Q1 is qualified to automotive AEC-Q100 grade 1 and is available in 8-pin WSON package with 0.8-mm pin pitch and wettable flanks.
Features
- 10-V to 65-V input voltage range
- 15-V and -7.7-V output voltages
- Rated for up to 200 mA of load current
- Resistor divider to EN/UVLO to faciltate programmable input voltage UVLO
- Fully assembled, tested and proven PCB layout with small footprint
Typical applications
- Isolated bias power rails, IGBT gate drive supplies for BDC and BLDC motor drives
- Industrial and commercial vehicles
- Automotive body and powertrain
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | C | Tol. C | VR(V (DC)) | Size | Operating Temperature | DF(%) | RISO | Ceramic Type | L(mm) | W(mm) | H(mm) | Fl(mm) | Packaging | L(µH) | IR(mA) | ISAT(A) | fres(MHz) | Mount | Endurance(h) | IRIPPLE(mA) | Z(mΩ) | ILeak(µA) | Ø D(mm) | VIN | VOut1(V) | IOut1(A) | VOut2(V) | IOut2(A) | n | IR(mA) | RDC max.(Ω) | LS(nH) | VT(V (AC)) | Z @ 100 MHz(Ω) | Zmax(Ω) | Test Condition Zmax | IR 2(mA) | RDC max.(Ω) | Type | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WCAP-ASLL Aluminum Electrolytic Capacitors, 10 µF, ±20% | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-ASLL Aluminum Electrolytic Capacitors | Capacitance10 µF | Capacitance±20% | Rated Voltage100 V (DC) | Size6.3 x 7.7 | Operating Temperature -55 °C up to +105 °C | Dissipation Factor8 % | Insulation Resistance10 MΩ | – | Length7.7 mm | Width6.6 mm | – | – | Packaging15" Tape & Reel | – | – | – | – | MountV-Chip SMT | Endurance 2000 | Ripple Current65 mA | Impedance3900 mΩ | Leakage Current10 µA | Diameter6.3 mm | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | ||||
| WCAP-CSGP MLCCs 6.3 V(DC), 100 µF, ±20% | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 6.3 V(DC) | Capacitance100 µF | Capacitance±20% | Rated Voltage6.3 V (DC) | Size1210 | Operating Temperature -55 °C up to +85 °C | Dissipation Factor10 % | Insulation Resistance0.001 GΩ | Ceramic TypeX5R Class II | Length3.2 mm | Width2.5 mm | Height2.5 mm | Pad Dimension0.6 mm | Packaging7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
 | WE-CBF SMT EMI Suppression Ferrite Bead, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-CBF SMT EMI Suppression Ferrite Bead | – | – | – | Size0805 | Operating Temperature -55 °C up to +125 °C | – | – | – | Length2 mm | Width1.2 mm | Height0.9 mm | Pad Dimension0.5 mm | – | – | Rated Current4500 mA | – | – | MountSMT | – | – | – | – | – | – | – | – | – | – | – | Rated Current6000 mA | DC Resistance [1]0.008 Ω | – | – | Impedance @ 100 MHz22 Ω | Maximum Impedance40 Ω | Maximum Impedance1000 MHz | Rated Current 26000 mA | DC Resistance0.008 Ω | TypeHigh Current | ||||
 | WE-TPC SMT Tiny Power Inductor, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TPC SMT Tiny Power Inductor | – | – | – | Size4818 | Operating Temperature -40 °C up to +125 °C | – | – | – | Length4.8 mm | Width4.8 mm | Height1.8 mm | – | – | Inductance10 µH | Rated Current1300 mA | Saturation Current1 A | Self Resonant Frequency45 MHz | MountSMT | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | DC Resistance0.15 Ω | – | ||||
 | WE-FLYTI Flyback Transformers, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-FLYTI Flyback Transformers | – | – | – | SizeEP7 | Operating Temperature -40 °C up to +125 °C | – | – | – | Length9.76 mm | Width9.5 mm | Height10.54 mm | – | – | Inductance30 µH | – | Saturation Current2.4 A | – | MountSMT | – | – | – | – | – | Input Voltage 8 - 65 V (DC) | Output Voltage 115 V | Output Current 10.2 A | Output Voltage 28 V | Output Current 20.2 A | Turns Ratio1.82:1.82:1 | – | – | Leakage Inductance500 nH | Insulation Test Voltage1500 V (AC) | – | – | – | – | – | – |