L6566BHTR AC-DC Converters by STMicroelectronics

Multi-mode controller for SMPS

Status: Active
Series: L6566BH
RoHS: Compliant
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The L6566BH is an extremely versatile current-mode primary controller IC, specifically designed for high-performance offline flyback converters running off rectified 3-phase input lines. It is also suited to single-stage, single-switch, input-current-shaping converters (single-stage PFC) for applications that must comply with EN61000-3-2 or JEITA-MITI regulations. Both fixed-frequency (FF) and quasi-resonant (QR) operation are supported. The user can choose either of the two depending on application needs. The device features an externally programmable oscillator: it defines the converter switching frequency in FF mode and the maximum allowed switching frequency in QR mode. When FF operation is selected, the ICs work as a standard current-mode controller with a maximum duty cycle limited to 70% min. The oscillator frequency can be modulated to mitigate EMI emissions. QR operation, when selected, occurs at heavy load and is achieved through a transformer demagnetization sensing input that triggers MOSFET turn-on. Under some conditions, ZVS (zero-voltage switching) can be achieved. The converter’s power capability rise with the mains voltage is compensated by line voltage feedforward. At medium and light load, as the QR operating frequency equals the oscillator frequency, a function (valley skipping) is activated to prevent further frequency rise and keep the operation as close to ZVS as possible. With either FF or QR operation, at very light load the ICs enter a controlled burst-mode operation that, along with the built-in, non-dissipative, high-voltage startup circuit and the low quiescent current, helps keep the consumption from the mains low and meet energy saving recommendations. An innovative adaptive UVLO helps minimize the issues related to the fluctuations of the self-supply voltage due to transformer parasites. The protection functions included in this device are: not-latched input undervoltage (brownout), output OVP (auto-restart or latch-mode selectable), a first-level OCP with delayed shutdown to protect the system during overload or short-circuit conditions (auto-restart or latch-mode selectable), and a second-level OCP that is invoked when the transformer saturates or there is a short-circuit of the secondary diode. A latched disable input allows easy implementation of OTP with an external NTC, while an internal shutdown prevents IC overheating. Programmable soft-start, leading-edge blanking on the current sense input for greater noise immunity, slope compensation (in FF mode only), and a shutdown function for externally controlled burst-mode operation or remote ON/OFF control complete the features of this device.

Prices starting from US$0.74


Distributor Starting From Stock
Logo for Newark Electronics Newark Electronics US$1.16
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Logo for Future Electronics Future Electronics US$0.88
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Logo for Avnet America Avnet America US$0.96
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Logo for element14 element14 US$1.30
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Logo for EBV Elektronik EBV Elektronik -
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Features

Selectable multimode operation: fixed frequency or quasi-resonant
On-board 840 V high voltage startup
Advanced light load management
Low quiescent current (< 3 mA)
Adaptive UVLO
Line feedforward for constant power capability vs. mains voltage
Pulse-by-pulse OCP, shutdown on overload (latched or auto-restart)
Transformer saturation detection
Programmable frequency modulation for EMI reduction
Latched or auto-restart OVP
Brownout protection
-600/+800 mA totem pole gate driver with active pull-down during UVLO
SO16N package

Alternative Descriptions

Pwm Controller, 300Khz, 23V, Soic-16 | Newark Electronics
L6566BH Series 23 V 4.6 mA SMPS Multi-Mode Controller Surface Mount - SOIC-16N | Future Electronics
Current Mode PWM Controller 800mA 16-Pin SO N T/R | Avnet America
PWM CONTROLLER, 300KHZ, 23V, SOIC-16 | Farnell


Frequently Asked Questions

Where can I find additional details, specifications and documents for a L6566BHTR?

Additional datasheets, footprints and schematics for L6566BHTR are listed on our Part Details page. You can also find images and similar parts to L6566BHTR on this page.

What pricing and inventory information can I view?

Distributor pricing and stock information is available for L6566BHTR on our Product Comparison page. Access via the 'View Pricing & Stock' button to view L6566BHTR price breaks, MOQs, lead times, inventory and SKUs from distributors.

What category does L6566BHTR fall under?

The L6566BHTR is listed under Power Management > AC-DC Converters > PWM Controllers.

Can I view similar or alternative parts?

You can view similar parts to L6566BHTR when available in the PWM 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 L6566BHTR you can contact the distributor directly for product support, shipping queries etc.

Is the L6566BHTR RoHS compliant?

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

Which authorised distributors for L6566BHTR have stock available?

Authorised distributors including Newark Electronics, Future Electronics, Avnet America, element14 and Farnell have stock available or on a lead time for L6566BHTR.

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