L6599ATD AC-DC Converters by STMicroelectronics

IMPROVED HIGH-VOLTAGE RESONANT CONTROLLER

Semiconductors - ICs
> Special Function
Status: Active
Series: L6599AT
RoHS: Compliant
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The L6599AT is an improved revision of the previous L6599A. It is a double-ended controller specific to series-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 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 startup, 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. At light load the IC may enter a controlled burst mode operation that keeps the converter input consumption to a minimum. IC 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 the pre-regulator to be switched off during fault conditions, such as OCP shutdown and DIS high, or during burst mode operation.

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Prices starting from US$2.76

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element14
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Farnell
from US$3.44
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Newark Electronics
from US$3.52
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Avnet Silica
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Avnet America
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Features

50% duty cycle, variable frequency control of resonant half bridge
High accuracy oscillator
Up to 500 kHz operating frequency
Two-level OCP: frequency-shift and latched shutdown
Interface with PFC controller
Latched disable input
Burst mode operation at light load
Input for power-ON/OFF sequencing or brownout protection
Non-linear soft-start for monotonic output voltage rise
600 V - rail compatible high-side gate driver with integrated bootstrap diode and high dv/dt immunity
-300/700 mA high-side and low-side gate drivers with UVLO pull-down
Guaranteed for extreme temperature ranges

Last 6 months Inventory & Pricing History

Alternative Descriptions

RESONANT CONTROLLER, NSOIC-16 | element14
Resonant Controller, 150Deg C | Newark Electronics
High Voltage Resonant Controller 16-Pin SO N Tube | Avnet Silica

Frequently Asked Questions

Where can I find additional details, specifications and documents for a L6599ATD?

Additional datasheets, footprints and schematics for L6599ATD are listed on our Part Details page. You can also find images and similar parts to L6599ATD on this page.

What pricing and inventory information can I view?

Distributor pricing and stock information is available for L6599ATD on our Product Comparison page. Access via the 'View Pricing & Stock' button to view L6599ATD price breaks, MOQs, lead times, inventory and SKUs from distributors.

What category does L6599ATD fall under?

The L6599ATD is listed under Power Management > AC-DC Converters > Digital and Resonant Controllers.

Can I view similar or alternative parts?

You can view similar parts to L6599ATD when available in the Digital and Resonant Controllers range under the specifications section at the bottom of the details page.

Who can I contact for technical support of the product?

Submit any questions directly to the customer support team of the distributor listing the product. For the L6599ATD you can contact the distributor directly for product support, shipping queries etc.

Is the L6599ATD RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by STMicroelectronics.

Which authorised distributors for L6599ATD have stock available?

Authorised distributors including element14, Farnell, Newark Electronics, Avnet Silica and Avnet America have stock available or on a lead time for L6599ATD.

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