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Enhanced high-voltage resonant controller
  • active 活性

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.

pdf Please read
Errata Sheet
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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

图案 资源


Technical Documentation

Product Specifications

描述 版本 大小
DS8908: Enhanced high voltage resonant controller
2.0 955 KB

Application Notes

描述 版本 大小
AN4026: 19 V - 90 W adapter with PFC for laptop computers using the L6563H and L6699
1.2 989 KB
AN4027: 12 V - 150 W resonant converter with synchronous rectification using the L6563H, L6699 and SRK2000A
3.0 2,884 KB

Design Notes & Tips

描述 版本 大小
DT0009: Speed up development of the L6699 with the L6599A and flexible PCB layout
1.0 262 KB

HW Model & CAD Libraries

HW Model & CAD Libraries

描述 版本 大小
L6699 ORCAD macromodel
94 KB
L6699 SIMPLIS MAROTTA encrypted
194 KB

Related Tools and Software

Related Tools and Software

产品型号 描述
EVL6699-90WADP 19V - 90W Adapter with PFC for Laptop computers using the L6563H and L6699
STEVAL-ISA138V1 19 V - 90 W adapter with PFC for laptop computers using the L6563H and L6699
STEVAL-ISA143V1 12 V - 150 W resonant converter with synchronous rectification using the L6563H, L6699 and SRK2000

Publications and Collaterals

Conference Paper

描述 版本 大小
1.0.0 418 KB

样品 & 购买

产品型号 Marketing StatusPackagePacking TypeAutomotive GradeOrder From STUnit Price (US$)*
@ 1000
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
L6699DActiveSO-16Tube_-1.475Distributor reported inventory date: 2014-09-16
Distributor NameRegionStockMin. order
Farnell Element14Order NowEUROPE1431
L6699DTRActiveSO-16Tape And Reel_Free Samples1.475Distributor reported inventory date: 2014-09-16
Distributor NameRegionStockMin. order

(*) 建议零售价格仅用于预算,以美元为单位,每。的报价,以当地货币计算的价格,请联系您当地的 ST 销售办事处 或我们的 分销商
(**) 材料声明表格上提供st.com可以是一般的文件,根据最常用的包,包内的家庭。出于这个原因,他们可能不是100%准确,对于一个特定的设备。请联系我们 销售支持 在特定设备上的信息。
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