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  • The L6599AT 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 extreme temperature ranges

Circuit Diagram

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STMicroelectronics - L6599AT

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L6599ATD
Active
SO-16 Industrial Ecopack2
L6599ATDTR
Active
SO-16 Industrial Ecopack2

L6599ATD

Package:

SO-16

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SO-16

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L6599ATDTR

Package:

SO-16

Material Declaration**:

PDF XML

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

Part Number
Order from Distributors
Order from ST
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
min
max
L6599ATDTR Available at 3 distributors

Distributor availability ofL6599ATDTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 12307 1 Order Now
MOUSER WORLDWIDE 1622 1 Order Now
Farnell Element14 EUROPE 4965 1 Order Now

Distributor reported inventory date: 2020-11-23

Distributor Name

DIGIKEY

Stock

12307

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

1622

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

4965

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-11-23

Free Sample Buy Direct
Active
EAR99 NEC Tape And Reel SO-16 - - CHINA 1.17 / 1k
L6599ATD Available at 3 distributors

Distributor availability ofL6599ATD

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 389 1 Order Now
MOUSER WORLDWIDE 800 1 Order Now
Farnell Element14 EUROPE 857 1 Order Now

Distributor reported inventory date: 2020-11-23

Distributor Name

DIGIKEY

Stock

389

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

800

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

857

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-11-23

Buy Direct
Active
EAR99 NEC Tube SO-16 - - CHINA 1.17 / 1k

L6599ATDTR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.17 / 1k

Distributor availability ofL6599ATDTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 12307 1 Order Now
MOUSER WORLDWIDE 1622 1 Order Now
Farnell Element14 EUROPE 4965 1 Order Now

Distributor reported inventory date: 2020-11-23

Distributor Name

DIGIKEY

Stock

12307

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

1622

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

4965

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-11-23

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SO-16

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

1.17 / 1k

Country of Origin

CHINA

L6599ATD

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.17 / 1k

Distributor availability ofL6599ATD

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 389 1 Order Now
MOUSER WORLDWIDE 800 1 Order Now
Farnell Element14 EUROPE 857 1 Order Now

Distributor reported inventory date: 2020-11-23

Distributor Name

DIGIKEY

Stock

389

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

800

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

857

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-11-23

ECCN (EU)

NEC

Packing Type

Tube

Package

SO-16

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

1.17 / 1k

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