L6566BH

量産中
Design Win

Multi-mode controller for SMPS

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製品概要

概要

The L6566BH is an extremely versatile current-mode primary controller IC, specifically designed for high-performance offline flyback converters running off rectified 3-phase input lines. It is also suited to single-stage, single-switch, input-current-shaping converters (single-stage PFC) for applications that must comply with EN61000-3-2 or JEITA-MITI regulations.

Both fixed-frequency (FF) and quasi-resonant (QR) operation are supported. The user can choose either of the two depending on application needs. The device features an externally programmable oscillator: it defines the converter switching frequency in FF mode and the maximum allowed switching frequency in QR mode.

When FF operation is selected, the ICs work as a standard current-mode controller with a maximum duty cycle limited to 70% min. The oscillator frequency can be modulated to mitigate EMI emissions.

QR operation, when selected, occurs at heavy load and is achieved through a transformer demagnetization sensing input that triggers MOSFET turn-on. Under some conditions, ZVS (zero-voltage switching) can be achieved. The converter’s power capability rise with the mains voltage is compensated by line voltage feedforward. At medium and light load, as the QR operating frequency equals the oscillator frequency, a function (valley skipping) is activated to prevent further frequency rise and keep the operation as close to ZVS as possible.

With either FF or QR operation, at very light load the ICs enter a controlled burst-mode operation that, along with the built-in, non-dissipative, high-voltage startup circuit and the low quiescent current, helps keep the consumption from the mains low and meet energy saving recommendations.

An innovative adaptive UVLO helps minimize the issues related to the fluctuations of the self-supply voltage due to transformer parasites.

The protection functions included in this device are: not-latched input undervoltage (brownout), output OVP (auto-restart or latch-mode selectable), a first-level OCP with delayed shutdown to protect the system during overload or short-circuit conditions (auto-restart or latch-mode selectable), and a second-level OCP that is invoked when the transformer saturates or there is a short-circuit of the secondary diode. A latched disable input allows easy implementation of OTP with an external NTC, while an internal shutdown prevents IC overheating.

Programmable soft-start, leading-edge blanking on the current sense input for greater noise immunity, slope compensation (in FF mode only), and a shutdown function for externally controlled burst-mode operation or remote ON/OFF control complete the features of this device.

  • 特徴

    • Selectable multimode operation: fixed frequency or quasi-resonant
    • On-board 840 V high voltage startup
    • Advanced light load management
    • Low quiescent current (< 3 mA)
    • Adaptive UVLO
    • Line feedforward for constant power capability vs. mains voltage
    • Pulse-by-pulse OCP, shutdown on overload (latched or auto-restart)
    • Transformer saturation detection
    • Programmable frequency modulation for EMI reduction
    • Latched or auto-restart OVP
    • Brownout protection
    • -600/+800 mA totem pole gate driver with active pull-down during UVLO
    • SO16N package

回路ダイアグラム

eDesignSuite

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Power Supply Design Tool

SMPS design, by topology, by type and by product
PFC design with analog and digitial control
Supports various PCB configurations
Power Supply
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Output Power: 0

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品質 & 信頼性

製品型番 マーケティング・ステータス パッケージ グレード RoHSコンプライアンスグレード 材料宣誓書**
L6566BH
量産中
SO-16 インダストリアル Ecopack2
L6566BHTR
量産中
SO-16 インダストリアル Ecopack2

L6566BH

Package:

SO-16

Material Declaration**:

PDF XML

Marketing Status

量産中

Package

SO-16

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L6566BHTR

Package:

SO-16

Material Declaration**:

PDF XML

Marketing Status

量産中

Package

SO-16

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) st.comで提供している材料宣誓書は、パッケージ・ファミリ内で最も一般的に使用されているパッケージに基づく汎用ドキュメントの場合があります。そのため、特定の製品では100%正確ではない可能性があります。特定の製品情報については、セールスサポートまでお問い合わせください

サンプル & 購入

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製品型番
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製品ステータス
ECCN (US)
ECCN (EU)
梱包タイプ
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温度(℃) Country of Origin
Budgetary Price (US$)*/Qty
最小
最大
L6566BH Available at distributors

販売代理店在庫 L6566BH

販売代理店
地域 在庫 最小発注数量 パートナー企業リンク

販売代理店在庫データ:

販売代理店に在庫がない場合は、STのセールス・オフィスまでお問い合わせください

量産中
EAR99 NEC Tube SO-16 - - PHILIPPINES
L6566BHTR Available at distributors

販売代理店在庫 L6566BHTR

販売代理店
地域 在庫 最小発注数量 パートナー企業リンク

販売代理店在庫データ:

販売代理店に在庫がない場合は、STのセールス・オフィスまでお問い合わせください

量産中
EAR99 NEC Tape and Reel SO-16 - - PHILIPPINES

L6566BH 量産中

パッケージ:
SO-16
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

製品型番:

L6566BH

ECCN (EU):

NEC

梱包タイプ:

Tube

Operating Temperature (°C)

最小:

-

最大:

-

Country of Origin:

PHILIPPINES

L6566BHTR 量産中

パッケージ:
SO-16
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

製品型番:

L6566BHTR

ECCN (EU):

NEC

梱包タイプ:

Tape and Reel

Operating Temperature (°C)

最小:

-

最大:

-

Country of Origin:

PHILIPPINES

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(*)概算用の参考価格(US$)です。現地通貨でのお見積りについては、STのセールス・オフィスまたは販売代理店までお問い合わせください。