L6599AF

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Ultra-extreme temperature range improved high voltage resonant controller

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  • The L6599AF is an improved revision of the previous L6599A. It is a double-ended controller specific to series-resonant half bridge topology. It provides 50% 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. A fixed deadtime inserted between the turn-off of one switch and the turn-on of the other guarantees soft-switching and enables high-frequency operation.

    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 designer to set the operating frequency range of the converter by means of an externally programmable oscillator.
    At startup, to prevent uncontrolled inrush current, the switching frequency starts from a programmable maximum value and progressively decays until it reaches the steady-state value determined by the control loop. This frequency shift is non-linear to minimize output voltage overshoots; its duration is programmable as well.
    At light load the IC may enter a controlled burst mode operation that keeps the converter input consumption to a minimum.
    IC functions include a not-latched active-low disable input with current hysteresis useful for power sequencing or for brownout protection, a current sense input for OCP with frequency shift and delayed shutdown with automatic restart. A higher level OCP latches off the IC if the first-level protection is not sufficient to control the primary current. Their combination offers complete protection against overload and short-circuits. An additional latched disable input (DIS) allows easy implementation of OTP and/or OVP.
    An interface with the PFC controller is provided that enables the pre-regulator to be switched off during fault conditions, such as OCP shutdown and DIS high, or during burst mode operation.

    Key Features

    • 50% duty cycle, variable frequency control of resonant half bridge
    • High accuracy oscillator
    • Up to 500 kHz operating frequency
    • Two-level OCP: frequency-shift and latched shutdown
    • Interface with PFC controller
    • Latched disable input
    • Burst mode operation at light load
    • Input for power-ON/OFF sequencing or brownout protection
    • Non-linear soft-start for monotonic output voltage rise
    • 600 V - rail compatible high-side gate driver with integrated bootstrap diode and high dv/dt immunity
    • -300/700 mA high-side and low-side gate drivers with UVLO pull-down
    • Guaranteed for temperatures as low as -50 °C

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STMicroelectronics - L6599AF

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L6599AFD
Active
SO-16 Industrial Ecopack2
L6599AFDTR
Active
SO-16 Industrial Ecopack2

L6599AFD

Package:

SO-16

Material Declaration**:

Marketing Status

Active

Package

SO-16

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L6599AFDTR

Package:

SO-16

Material Declaration**:

Marketing Status

Active

Package

SO-16

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

Sample & Buy

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Temperature (°C) Country of Origin
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L6599AFDTR Available at 1 distributors

Distributor availability ofL6599AFDTR

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MOUSER WORLDWIDE 85 1 Order Now

Distributor reported inventory date: 2020-10-29

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MOUSER

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85

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1

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WORLDWIDE Order Now

Distributor reported inventory date: 2020-10-29

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Active
EAR99 NEC Tape And Reel SO-16 - - CHINA
L6599AFD No availability of distributors reported, please contact our sales office Buy Direct
Active
EAR99 NEC Tube SO-16 - - CHINA

L6599AFDTR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

Distributor availability ofL6599AFDTR

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 85 1 Order Now

Distributor reported inventory date: 2020-10-29

Distributor Name

MOUSER

Stock

85

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-10-29

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SO-16

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

Country of Origin

CHINA

L6599AFD

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

ECCN (EU)

NEC

Packing Type

Tube

Package

SO-16

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

Country of Origin

CHINA

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors