L6699

量産中
Design Win

Enhanced high-voltage resonant controller

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製品概要

概要

The L6699 is a double-ended controller specific to series-resonant half bridge topology. Both LLC and LCC configurations are supported. It provides symmetrical complementary duty cycle: the high-side switch and the low-side switch are driven ON/OFF 180° out-of-phase for exactly the same time. Output voltage regulation is obtained by modulating the operating frequency. The deadtime inserted between the turn-off of one switch and the turn-on of the other one is automatically adjusted to best fit the transition times of the half bridge midpoint. To drive the high-side switch with the bootstrap approach, the IC incorporates a high voltage floating structure able to withstand more than 600 V with a synchronous-driven high voltage DMOS that replaces the external fast-recovery bootstrap diode.

The IC enables the user to set the operating frequency range of the converter by means of a high-accuracy externally programmable oscillator.

At startup, in addition to the traditional frequency-shift soft-start (the switching frequency starts from a preset maximum value and then decays as far as the steady-state value determined by the control loop), a proprietary circuit controls the half bridge to prevent hard-switching from occurring in the initial cycles because of the unbalance in the V·s applied to the transformer.

At light load the IC can be forced to enter a controlled burst-mode operation that keeps the converter input consumption as low as possible.

IC protection functions include a current sense input for OCP with frequency shift and delayed shutdown with automatic restart. Fast shutdown with automatic restart occurs if this first-level protection cannot control the primary current. Additionally, the IC prevents the converter from working in or too close to the capacitive mode, to guarantee soft-switching. A latched disable input (DIS) can be used to implement OTP and/or OVP. The combination of these protection features offers the highest degree of safety.

Other functions include a not-latched active-low disable input with current hysteresis, useful for power sequencing or for brownout protection, and an interface with the PFC controller that enables the switching-off of the pre-regulator during fault conditions or during burst-mode operation.

  • 特徴

    • Symmetrical duty cycle, variable frequency control of resonant half bridge
    • Self-adjusting adaptive deadtime
    • High-accuracy oscillator
    • 2-level OCP: frequency-shift and immediate shutdown
    • Interface with PFC controller
    • Anti-capacitive-mode protection
    • Burst-mode operation at light load
    • Input for brownout protection or power-on/off sequencing
    • “Safe-start” procedure prevents hard switching at startup
    • 600 V rail compatible high-side gate driver with integrated bootstrap diode and high dv/dt immunity
    • -300/800 mA high-side and low-side gate drivers with UVLO pull-down
    • SO16N package

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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**
L6699D
量産中
SO-16 インダストリアル Ecopack2
L6699DTR
量産中
SO-16 インダストリアル Ecopack2

L6699D

Package:

SO-16

Material Declaration**:

PDF XML

Marketing Status

量産中

Package

SO-16

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L6699DTR

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

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製品型番
製品ステータス
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パッケージ
梱包タイプ
RoHS
Country of Origin
ECCN (US)
ECCN (EU)
L6699D
Available at distributors

販売代理店在庫 L6699D

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L6699DTR
Available at distributors

販売代理店在庫 L6699DTR

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:

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L6699D 量産中

Budgetary Price (US$)*/Qty:
-
パッケージ:
梱包タイプ:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):

製品型番:

L6699D

販売代理店

販売代理店在庫データ:

L6699DTR 量産中

Budgetary Price (US$)*/Qty:
-
パッケージ:
梱包タイプ:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):

製品型番:

L6699DTR

販売代理店

販売代理店在庫データ:

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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。