L6699

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Enhanced high-voltage resonant controller

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Product overview

Description

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.

  • All 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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All tools & software

    • Part number
      Status
      Description
      Type
      Supplier

      EVL400W-80PL

      Active

      12 V - 400 W adapter based on L4985A, L6699 and SRK2001

      AC-DC Converter ST
      EVL400W-80PL

      Description:

      12 V - 400 W adapter based on L4985A, L6699 and SRK2001

      STEVAL-ISA132V1

      Active

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

      PSU and Converter Solution Eval Boards ST
      STEVAL-ISA132V1

      Description:

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

      STEVAL-ISA138V1

      Active

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

      PSU and Converter Solution Eval Boards --
      STEVAL-ISA138V1

      Description:

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

      STEVAL-ISA170V1

      Active

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

      PSU and Converter Solution Eval Boards ST
      STEVAL-ISA170V1

      Description:

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

EDA Symbols, Footprints and 3D Models

STMicroelectronics - L6699

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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

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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 distributors

Distributor availability of L6699D

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Region Stock Min. Order Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Tube SO-16 - - PHILIPPINES
L6699DTR Available at distributors

Distributor availability of L6699DTR

Distributor Name
Region Stock Min. Order Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Tape and Reel SO-16 - - PHILIPPINES

L6699D Active

Package:
SO-16
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

L6699D

ECCN (EU):

NEC

Packing Type:

Tube

Operating Temperature (°C)

Min:

-

Max:

-

Country of Origin:

PHILIPPINES

Distributor Name

Distributor reported inventory date:

L6699DTR Active

Package:
SO-16
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

L6699DTR

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-

Max:

-

Country of Origin:

PHILIPPINES

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