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.
|DS8908: Enhanced high voltage resonant controller||2.0||954 KB|
|AN4677: 12 V - 150 W resonant converter with synchronous rectification based on L6563H, L6699 and SRK2001||1.0||3 MB|
|AN4027: 12 V - 150 W resonant converter with synchronous rectification using the L6563H, L6699 and SRK2000A||3.0||2 MB|
|AN4026: 19 V - 90 W adapter with PFC for laptop computers using the L6563H and L6699||1.2||988 KB|
|AN4720: Half bridge resonant LLC converters and primary side MOSFET selection||1.0||1 MB|
|AN4599: STEVAL-ISA132V1 24 V 300 W peak power resonant converter||3.0||904 KB|
|DT0009: Speed up development of the L6699 with the L6599A and flexible PCB layout||1.1||262 KB|
|L6699 ORCAD macromodel||1.0||94 KB|
|L6699 SIMPLIS MAROTTA encrypted||1.0||194 KB|
|EuP Lot 6 Tier2 Ecodesign requirements for Standby||2 MB|
|L6699: Double-ended controller specific to series-resonant half-bridge topology||2.0||430 KB|
|Primary side regulation controllers portfolio||1 MB|
|Brochure Power management guide||09.2017||3 MB|
|EVL400W-ADP/ATX||12V - 400W SMPS for Adapter, Desktop and AIO using L4984D, L6699 and SRK2000A|
|STEVAL-ISA132V1||ST||300 W peak power (170 W continuous power) LLC resonant converter based on L6699, STB13N60M2 and STPS20M80CG|
|STEVAL-ISA138V1||19 V - 90 W adapter with PFC for laptop computers using the L6563H and L6699|
|STEVAL-ISA170V1||ST||12 V - 150 W resonant converter with synchronous rectification based on L6563H, L6699 and SRK2001|
|製品型番||パッケージ||Packing Type||Marketing Status||Unit Price (US$) *||数量||ECCN (EU)||ECCN (US)||Country of Origin||More info||Order from ST||Order from Distributors|
|L6699D||SO-16||Tube||Active : Product is in volume production||0.919||1000||NEC||EAR99||CHINA||MORE INFO||DISTRIBUTOR AVAILABILITY|
|L6699DTR||SO-16||Tape And Reel||Active : Product is in volume production||0.919||1000||NEC||EAR99||CHINA||MORE INFO||サンプル入手 買い物かごに追加||DISTRIBUTOR AVAILABILITY|
|製品型番||Marketing Status||パッケージ||Grade||RoHS Compliance Grade||Material Declaration**|
(**) 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.