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  • The L6599 is a double-ended controller specific for the 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 one 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 start-up, 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.
    The IC can be forced to enter a controlled burst-mode operation at light load, so as to keep converter's input consumption to a minimum.
    IC's 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 to switch off the pre-regulator during fault conditions, such as OCP shutdown and DIS high, or during burst-mode operation.

    Key Features

    • 600 V-rail compatible high-side gate driver with integrated bootstrap diode and high dV/dt immunity
    • Non-linear soft-start for monotonic output voltage rise
    • DIP-16, SO-16N packages
    • -300/800 mA high-side and low-side gate drivers with UVLO pull-down
    • Burst-mode operation at light load
    • Latched disable input
    • 50 % duty cycle, variable frequency control of resonant half-bridge
    • Up to 500 kHz operating frequency
    • High-accuracy oscillator
    • Interface with PFC controller
    • Input for power-ON/OFF sequencing or brownout protection
    • Two-level OCP: frequency-shift and latched shutdown

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      Resonant LCC 90 W notebook power adapter based on the L6599 and STP9NK50ZF

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS4739
      High-voltage resonant controller
      3.1
      633.4 KB
      PDF
      DS4739

      High-voltage resonant controller

    • Description Version Size Action
      AN2644
      An introduction to LLC resonant half-bridge converter
      2.0
      1.27 MB
      PDF
      AN2450
      LLC resonant half-bridge converter design guideline
      6.0
      746.74 KB
      PDF
      AN2644

      An introduction to LLC resonant half-bridge converter

      AN2450

      LLC resonant half-bridge converter design guideline

Presentations & Training Material

    • Description Version Size Action
      Primary side regulation controllers portfolio
      1.1 MB
      PDF

      Primary side regulation controllers portfolio

Publications and Collaterals

    • Description Version Size Action
      Power Management Guide 07.2020
      7.12 MB
      PDF

      Power Management Guide

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L6599D
NRND
SO-16 Industrial Ecopack2
L6599DTR
NRND
SO-16 Industrial Ecopack2

L6599D

Package:

SO-16

Material Declaration**:

Marketing Status

NRND

Package

SO-16

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L6599DTR

Package:

SO-16

Material Declaration**:

Marketing Status

NRND

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
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ECCN (US)
ECCN (EU)
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Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
min
max
L6599DTR Available at 6 distributors

Distributor availability ofL6599DTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 3263 1 Order Now
COMPEL EUROPE 1106 1 Order Now
ARROW EUROPE 17500 0 Order Now
Newark Element14 AMERICA 598 0 Order Now
MOUSER WORLDWIDE 1687 1 Order Now
Farnell Element14 EUROPE 1495 1 Order Now

Distributor reported inventory date: 2020-09-18

Distributor Name

DIGIKEY

Stock

3263

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

1106

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

17500

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

598

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

1687

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1495

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-09-18

Buy now
NRND
EAR99 NEC Tape And Reel SO-16 - - CHINA 0.836 / 1k
L6599D Available at 7 distributors

Distributor availability ofL6599D

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1518 1 Order Now
COMPEL EUROPE 5 1 Order Now
RS COMPONENTS EUROPE 55 1 Order Now
ARROW EUROPE 391 0 Order Now
Newark Element14 AMERICA 56 0 Order Now
MOUSER WORLDWIDE 839 1 Order Now
Farnell Element14 EUROPE 683 1 Order Now

Distributor reported inventory date: 2020-09-18

Distributor Name

DIGIKEY

Stock

1518

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

5

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

55

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

391

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

56

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

839

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

683

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-09-18

Buy now
NRND
EAR99 NEC Tube SO-16 - - CHINA 0.836 / 1k

L6599DTR

Marketing Status

NRND

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.836 / 1k

Distributor availability ofL6599DTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 3263 1 Order Now
COMPEL EUROPE 1106 1 Order Now
ARROW EUROPE 17500 0 Order Now
Newark Element14 AMERICA 598 0 Order Now
MOUSER WORLDWIDE 1687 1 Order Now
Farnell Element14 EUROPE 1495 1 Order Now

Distributor reported inventory date: 2020-09-18

Distributor Name

DIGIKEY

Stock

3263

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

1106

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

17500

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

598

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

1687

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1495

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-09-18

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SO-16

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

0.836 / 1k

Country of Origin

CHINA

L6599D

Marketing Status

NRND

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.836 / 1k

Distributor availability ofL6599D

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1518 1 Order Now
COMPEL EUROPE 5 1 Order Now
RS COMPONENTS EUROPE 55 1 Order Now
ARROW EUROPE 391 0 Order Now
Newark Element14 AMERICA 56 0 Order Now
MOUSER WORLDWIDE 839 1 Order Now
Farnell Element14 EUROPE 683 1 Order Now

Distributor reported inventory date: 2020-09-18

Distributor Name

DIGIKEY

Stock

1518

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

5

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

55

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

391

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

56

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

839

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

683

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-09-18

ECCN (EU)

NEC

Packing Type

Tube

Package

SO-16

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

0.836 / 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