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LM5185

現行

具低 IQ 與低 EMI 的 100-VIN 一次側調節返馳控制器

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產品規格表

LM5185

現行
產品規格表 立即訂購

產品詳細資料

Vin (min) (V) 4.5 Vin (max) (V) 100 Operating temperature range (°C) -40 to 125 Control mode Peak current mode Topology PSR flyback Rating Catalog
Vin (min) (V) 4.5 Vin (max) (V) 100 Operating temperature range (°C) -40 to 125 Control mode Peak current mode Topology PSR flyback Rating Catalog
HTSSOP (PWP) 14 32 mm² 5 x 6.4
  • Functional Safety-Capable
  • 4.5-V to 100-V wide input voltage range
  • Extended power range from less than 1 W to more than 50 W
  • Robust PSR flyback design for reliable and rugged applications
    • Robust design with only a transformer crossing the isolation barrier
    • ±1.5% total output regulation accuracy
    • Optional VOUT temperature compensation
    • Input UVLO and thermal shutdown protection
    • Hiccup-mode overcurrent fault protection
    • 0.9-mm HV-LV pin spacing in 14-pin HTSSOP package
    • –40°C to +150°C junction temperature range
  • Integration reduces design size and cost
    • No optocoupler or transformer auxiliary winding required for V OUT regulation
    • 2-A peak sink and 1-A peak source high-current power MOSFET gate driver
  • High efficiency with best-in-class active I Q
    • Quasi-resonant switching in boundary conduction mode (BCM) at heavy load
    • External VCC option for improved efficiency
    • High light-load efficiency with lowest I Q (25-µA typical with external VCC)
    • Single and multiple output implementations
  • Ultra-low conducted and radiated EMI signatures
    • Soft switching avoids diode reverse recovery
    • Designed for CISPR 32 EMI requirement
  • Create a custom design using LM5185 with WEBENCH Power Designer
  • Functional Safety-Capable
  • 4.5-V to 100-V wide input voltage range
  • Extended power range from less than 1 W to more than 50 W
  • Robust PSR flyback design for reliable and rugged applications
    • Robust design with only a transformer crossing the isolation barrier
    • ±1.5% total output regulation accuracy
    • Optional VOUT temperature compensation
    • Input UVLO and thermal shutdown protection
    • Hiccup-mode overcurrent fault protection
    • 0.9-mm HV-LV pin spacing in 14-pin HTSSOP package
    • –40°C to +150°C junction temperature range
  • Integration reduces design size and cost
    • No optocoupler or transformer auxiliary winding required for V OUT regulation
    • 2-A peak sink and 1-A peak source high-current power MOSFET gate driver
  • High efficiency with best-in-class active I Q
    • Quasi-resonant switching in boundary conduction mode (BCM) at heavy load
    • External VCC option for improved efficiency
    • High light-load efficiency with lowest I Q (25-µA typical with external VCC)
    • Single and multiple output implementations
  • Ultra-low conducted and radiated EMI signatures
    • Soft switching avoids diode reverse recovery
    • Designed for CISPR 32 EMI requirement
  • Create a custom design using LM5185 with WEBENCH Power Designer

The LM5185 is a primary-side regulated (PSR) flyback controller with high efficiency over a wide input voltage range of 4.5 V to 100 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 a transformer crossing the isolation barrier. Boundary conduction mode (BCM) switching enables a compact magnetic design and better than ±1.5% load and line regulation performance. BCM supports applications of up to 100-V input with enhanced headroom for line transients.

The LM5185 flyback controller 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. The LM5185 controller, with the integrated high-current MOSFET gate driver, extends the power range from less than 1 W to more than 50 W, making the device a scalable and easy-to-migrate design over a wide power range. The tunable compensation using the COMP pin and the adjustable peak current limit with the current-sensing resistor make the design flexible and an excellent choice towards different application requirements.

Additional features include an internally-fixed or externally-programmable soft start, optional external VCC for higher efficiency, precision enable input with hysteresis for adjustable line UVLO, peak current-mode control with shunt current sensing, hiccup-mode overload protection, a high-current MOSFET gate driver, and thermal shutdown protection with automatic recovery. A connection to the high-voltage MOSFET drain is not required, thus increasing safety and simplifying PCB clearance distance requirements.

The LM5185 flyback controller is available in a 14-pin, 5-mm × 4.4-mm, thermally-enhanced HTSSOP package with 0.65-mm pin pitch.

The LM5185 is a primary-side regulated (PSR) flyback controller with high efficiency over a wide input voltage range of 4.5 V to 100 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 a transformer crossing the isolation barrier. Boundary conduction mode (BCM) switching enables a compact magnetic design and better than ±1.5% load and line regulation performance. BCM supports applications of up to 100-V input with enhanced headroom for line transients.

The LM5185 flyback controller 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. The LM5185 controller, with the integrated high-current MOSFET gate driver, extends the power range from less than 1 W to more than 50 W, making the device a scalable and easy-to-migrate design over a wide power range. The tunable compensation using the COMP pin and the adjustable peak current limit with the current-sensing resistor make the design flexible and an excellent choice towards different application requirements.

Additional features include an internally-fixed or externally-programmable soft start, optional external VCC for higher efficiency, precision enable input with hysteresis for adjustable line UVLO, peak current-mode control with shunt current sensing, hiccup-mode overload protection, a high-current MOSFET gate driver, and thermal shutdown protection with automatic recovery. A connection to the high-voltage MOSFET drain is not required, thus increasing safety and simplifying PCB clearance distance requirements.

The LM5185 flyback controller is available in a 14-pin, 5-mm × 4.4-mm, thermally-enhanced HTSSOP package with 0.65-mm pin pitch.
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類型 標題 日期
* Data sheet LM5185100-VINPSR Flyback DC/DC Controller With Low IQand Low EMI datasheet PDF | HTML 2023年 11月 10日
Technical article Mitigating CMTI on a PSR flyback for SiC-based traction inverter designs PDF | HTML 2024年 1月 5日
Certificate LM5185EVM-SIO EU Declaration of Conformity (DoC) 2023年 7月 24日
Functional safety information LMx5185 Functional Safety FIT Rate, FMD and Pin FMA PDF | HTML 2023年 5月 24日

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

LM5185EVM-SIO — LM5185-Q1 單一隔離輸出評估模組

LM5185EVM-SIO 評估模組 (EVM) 展示 LM5185-Q1 一次側穩壓 (PSR) 返馳控制器的功能與性能。可對變壓器主要繞組的電壓進行取樣，以達到嚴格的輸出穩壓，完全不需要使用光學耦合器或三級偏壓線圈。輸入電壓範圍為 20 V 到 60 V，而輸出為 16.4 V，額定負載為 1 A。
使用指南: PDF | HTML
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模擬型號

LM5185-Q1 Transient PSpice Model

SNVMCC7.ZIP (108 KB) - PSpice Model
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計算工具

LM5185-DESIGN-CALC — LM5185 PSR Flyback Controller Quickstart Design Calculator

LM5185 PSR Flyback Controller Quickstart Design Calculator
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產品
返馳控制器
LM5185 — 具低 IQ 與低 EMI 的 100-VIN 一次側調節返馳控制器 LM5185-Q1 — 具低 IQ 與低 EMI 的車用 100-VIN PSR 返馳控制器
AC/DC & DC/DC controllers (external FET)
LM5185 — 具低 IQ 與低 EMI 的 100-VIN 一次側調節返馳控制器 LM5185-Q1 — 具低 IQ 與低 EMI 的車用 100-VIN PSR 返馳控制器
硬體開發
LM5185EVM-SIO — LM5185-Q1 單一隔離輸出評估模組
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HTSSOP (PWP) 14 檢視選項
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