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  • 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.

    Key Features

    • 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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Evaluation Tools

    • Part Number

      300 W peak power (170 W continuous power) LLC resonant converter based on L6699, STB13N60M2 and STPS20M80CG

      19 V - 90 W adapter with PFC for laptop computers using the L6563H and L6699

      12 V - 150 W resonant converter with synchronous rectification based on L6563H, L6699 and SRK2001

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS8908
      Enhanced high voltage resonant controller
      2.0
      954.78 KB
      PDF
      DS8908

      Enhanced high voltage resonant controller

    • Description Version Size Action
      AN4677
      12 V - 150 W resonant converter with synchronous rectification based on L6563H, L6699 and SRK2001
      1.0
      3.11 MB
      PDF
      AN4027
      12 V - 150 W resonant converter with synchronous rectification using the L6563H, L6699 and SRK2000A
      3.0
      2.82 MB
      PDF
      AN5328
      150 V - 150 W LED driver with the L6564H and the L6699 transition mode PFC pre-regulator, half bridge LCC resonant converter
      1.0
      7.07 MB
      PDF
      AN4026
      19 V - 90 W adapter with PFC for laptop computers using the L6563H and L6699
      1.3
      988.23 KB
      PDF
      AN4720
      Half bridge resonant LLC converters and primary side MOSFET selection
      1.0
      1.4 MB
      PDF
      AN4599
      STEVAL-ISA132V1 24 V 300 W peak power resonant converter
      3.0
      904.42 KB
      PDF
      AN4677

      12 V - 150 W resonant converter with synchronous rectification based on L6563H, L6699 and SRK2001

      AN4027

      12 V - 150 W resonant converter with synchronous rectification using the L6563H, L6699 and SRK2000A

      AN5328

      150 V - 150 W LED driver with the L6564H and the L6699 transition mode PFC pre-regulator, half bridge LCC resonant converter

      AN4026

      19 V - 90 W adapter with PFC for laptop computers using the L6563H and L6699

      AN4720

      Half bridge resonant LLC converters and primary side MOSFET selection

      AN4599

      STEVAL-ISA132V1 24 V 300 W peak power resonant converter

    • Description Version Size Action
      DT0009
      Speed up development of the L6699 with the L6599A and flexible PCB layout
      1.2
      264.38 KB
      PDF
      DT0009

      Speed up development of the L6699 with the L6599A and flexible PCB layout

    • Description Version Size Action
      AN4677
      12 V - 150 W resonant converter with synchronous rectification based on L6563H, L6699 and SRK2001
      1.0
      3.11 MB
      PDF
      AN4599
      STEVAL-ISA132V1 24 V 300 W peak power resonant converter
      3.0
      904.42 KB
      PDF
      AN4677

      12 V - 150 W resonant converter with synchronous rectification based on L6563H, L6699 and SRK2001

      AN4599

      STEVAL-ISA132V1 24 V 300 W peak power resonant converter

HW Model, CAD Libraries & SVD

    • Description Version Size Action
      L6699 ORCAD macromodel 1.0
      94.26 KB
      ZIP
      L6699 SIMPLIS MAROTTA encrypted 1.0
      194.46 KB
      ZIP

      L6699 ORCAD macromodel

      L6699 SIMPLIS MAROTTA encrypted

Presentations & Training Material

    • Description Version Size Action
      EuP Lot 6 Tier2 Ecodesign requirements for Standby
      2.2 MB
      PDF
      L6699: Double-ended controller specific to series-resonant half-bridge topology 2.0
      430.88 KB
      PDF
      Primary side regulation controllers portfolio
      1.1 MB
      PDF

      EuP Lot 6 Tier2 Ecodesign requirements for Standby

      L6699: Double-ended controller specific to series-resonant half-bridge topology

      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**
L6699D
Active
SO-16 Industrial Ecopack2
L6699DTR
Active
SO-16 Industrial Ecopack2

L6699D

Package:

SO-16

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SO-16

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L6699DTR

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
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Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
min
max
L6699D Available at 6 distributors

Distributor availability ofL6699D

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 540 1 Order Now
COMPEL EUROPE 1 1 Order Now
RS COMPONENTS EUROPE 26 1 Order Now
P&S ASIA/PACIFIC 417 1 Order Now
MOUSER WORLDWIDE 844 1 Order Now
Farnell Element14 EUROPE 667 1 Order Now

Distributor reported inventory date: 2020-09-18

Distributor Name

DIGIKEY

Stock

540

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

1

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

26

Min.Order

1

Region

EUROPE Order Now

P&S

Stock

417

Min.Order

1

Region

ASIA/PACIFIC Order Now

MOUSER

Stock

844

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

667

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-09-18

Buy now
Active
EAR99 NEC Tube SO-16 - - PHILIPPINES 0.919 / 1k
L6699DTR Available at 7 distributors

Distributor availability ofL6699DTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 5117 1 Order Now
COMPEL EUROPE 2490 1 Order Now
FUTURE WORLDWIDE 2500 2500 Order Now
ARROW AMERICA 7500 2500 Order Now
P&S ASIA/PACIFIC 40 1 Order Now
MOUSER WORLDWIDE 3306 1 Order Now
Farnell Element14 EUROPE 1233 1 Order Now

Distributor reported inventory date: 2020-09-18

Distributor Name

DIGIKEY

Stock

5117

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

2490

Min.Order

1

Region

EUROPE Order Now

FUTURE

Stock

2500

Min.Order

2500

Region

WORLDWIDE Order Now

ARROW

Stock

7500

Min.Order

2500

Region

AMERICA Order Now

P&S

Stock

40

Min.Order

1

Region

ASIA/PACIFIC Order Now

MOUSER

Stock

3306

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1233

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-09-18

Sample & Buy Buy now
Active
EAR99 NEC Tape And Reel SO-16 - - PHILIPPINES 0.919 / 1k

L6699D

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.919 / 1k

Distributor availability ofL6699D

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 540 1 Order Now
COMPEL EUROPE 1 1 Order Now
RS COMPONENTS EUROPE 26 1 Order Now
P&S ASIA/PACIFIC 417 1 Order Now
MOUSER WORLDWIDE 844 1 Order Now
Farnell Element14 EUROPE 667 1 Order Now

Distributor reported inventory date: 2020-09-18

Distributor Name

DIGIKEY

Stock

540

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

1

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

26

Min.Order

1

Region

EUROPE Order Now

P&S

Stock

417

Min.Order

1

Region

ASIA/PACIFIC Order Now

MOUSER

Stock

844

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

667

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

0.919 / 1k

Country of Origin

PHILIPPINES

L6699DTR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.919 / 1k

Distributor availability ofL6699DTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 5117 1 Order Now
COMPEL EUROPE 2490 1 Order Now
FUTURE WORLDWIDE 2500 2500 Order Now
ARROW AMERICA 7500 2500 Order Now
P&S ASIA/PACIFIC 40 1 Order Now
MOUSER WORLDWIDE 3306 1 Order Now
Farnell Element14 EUROPE 1233 1 Order Now

Distributor reported inventory date: 2020-09-18

Distributor Name

DIGIKEY

Stock

5117

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

2490

Min.Order

1

Region

EUROPE Order Now

FUTURE

Stock

2500

Min.Order

2500

Region

WORLDWIDE Order Now

ARROW

Stock

7500

Min.Order

2500

Region

AMERICA Order Now

P&S

Stock

40

Min.Order

1

Region

ASIA/PACIFIC Order Now

MOUSER

Stock

3306

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1233

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

0.919 / 1k

Country of Origin

PHILIPPINES

(*) 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