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HVLED805TR

Off-line LED driver with primary-sensing up to 5W

Manufacturer:

STMicroelectronics, Inc
Mfr.Part #:

HVLED805TR
Datasheet:

HVLED805TR Datasheet (PDF)
Number of Channels:

1 Channel
Output Current:

1 A
Input Voltage:

11.5 V to 23 V
Operating Frequency:

166 kHz
EDA/CAD Models:

Request Free CAD Models for HVLED805TR

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HVLED805TR General Description

The HVLED805 is a high-voltage primary switcher intended for operating directly from the rectified mains with minimum external parts to provide an efficient, compact and cost effective solution for LED driving. It combines a high-performance low-voltage PWM controller chip and an 800V, avalanche-rugged power MOSFET, in the same package.The PWM is a current-mode controller IC specifically designed for ZVS (Zero Voltage Switching) fly-back LED drivers, with constant output current (CC) regulation using primary-sensing feedback. This eliminates the need for the opto-coupler, the secondary voltage reference, as well as the current sense on the secondary side, still maintaining a good LED current accuracy. Moreover it guarantees a safe operation when short circuit of one or more LEDs occurs.In addition, the device can also provide a constant output voltage regulation (CV): it makes the application able to work safely when the LED string opens due to a failure.Quasi-resonant operation is achieved by means of a transformer demagnetization sensing input that triggers MOSFET’s turn-on. This input serves also as both output voltage monitor, to perform CV regulation, and input voltage monitor, to achieve mains-independent CC regulation (line voltage feed forward).The maximum switching frequency is top-limited below 166 kHz, so that at medium-light load a special function automatically lowers the operating frequency still maintaining the operation as close to ZVS as possible. At very light load, the device enters a controlled burst-mode operation that, along with the built-in high-voltage start-up circuit and the low operating current of the device, helps minimize the residual input consumption.Although an auxiliary winding is required in the transformer to correctly perform CV/CC regulation, the chip is able to power itself directly from the rectified mains. This is useful especially during CC regulation, where the fly-back voltage generated by the winding drops.In addition to these functions that optimize power handling under different operating conditions, the device offers protection features that considerably increase end-product’s safety and reliability: auxiliary winding disconnection or brownout detection and shorted secondary rectifier or transformer’s saturation detection. All of them are auto restart mode.

Key Features

800 V, avalanche rugged internal power MOSFET
5% accuracy on constant LED output current with primary control
Optocoupler not needed
Quasi-resonant (QR) zero voltage switching (ZVS) operation
Internal HV start-up circuit
Open or short LED string management
Automatic self supply
Input voltage feed-forward for mains independent cc regulation

Specifications

Product Category:	LED Lighting Drivers	Number of Channels:	1 Channel
Output Current:	1 A	Input Voltage:	11.5 V to 23 V
Operating Frequency:	166 kHz	Supply Current - Max:	1.4 mA
Minimum Operating Temperature:	- 25 C	Maximum Operating Temperature:	+ 125 C
Mounting Style:	SMD/SMT	Series:	HVLED805
Packaging:	Reel	Output Type:	Constant Current, Constant Voltage
Product:	LED Drivers	Type:	Off-Line LED Driver
Topology:	Flyback	Moisture Sensitive:	Yes
Pd - Power Dissipation:	0.9 W	Product Type:	LED Lighting Drivers
Factory Pack Quantity:	2500	Subcategory:	Driver ICs
Unit Weight:	0.023492 oz	Tags	HVLED80, HVLED8, HVLED, HVLE, HVL