STMicroelectronics HVLED101
HVLED101 - Advanced high power factor flyback controller with valley locking and maximum power control
The HVLED101 is an enhanced peak current mode controller able to control mainly high power factor (HPF) flyback or buck-boost topologies having an output power up to 180 W. Some other topologies, like buck, boost and SEPIC could also be implemented. Primary Side Regulation of output voltage and Optocoupler control can be applied independently on the chip both exploiting precise regulation and very low standby power during no-load conditions. The innovative ST high-voltage technology allows to directly connect the HVLED101 to the input voltage in order to both start up the device and monitor the input voltage without the need of external components. Integrated valley locking feature guarantees noise free operation during medium and low load operation and maximum power control allows limiting the input power to a level programmable by the user to increase converter safety. Abnormal conditions like open circuit, output short-circuit, input overvoltage or undervoltage, external protection circuitries and circuit failures like open loop and overcurrent of the main switch are effectively controlled. A smart Auto Restart Timer (ART) function is built in to guarantee an automatic application recover, without any loss of reliability.
Features
- Quasi-Resonant (QR) topology
- Primary side regulation of output voltage
- Direct optocoupler connection for secondary side regulated loop
- High power factor and low THD in universal and extended range (PF> 0.9 and THD < 5% @ full load and < 10% @ 1/3 load)
- 800 V fast high-voltage startup
- Extremely low input power at no-load and standby conditions
- Integrated input voltage detection for high power factor capabilty, DC rail detection and protection triggering
- Programmable frequency foldback with valley locking for noise free operation
- Programmable maximum input power limitation for safety standard compliancy
- Programmable brownout and input overvoltage protection
- Latch-free device guarantee by smart Auto Restart Timer (ART)
- Input pin for remote protection with NTC management (threshold hysteresis and linearization)
EVLHV101PSR50W - 50 W converter using HVLED101 quasi resonant HPF flyback controller with primary side regulation
The EVLHV101PSR50W is intended to provide a stable and insulated 60 V voltage for a maximum power of 50 W.
It can be used as a standalone power supply or as a front end stage in a dimmable (or non-dimmable) off line LED driver.
A very high power factor, low THD and low BOM cost are obtained from this demonstration board thanks to the features of the HVLED101, which adopts frequency foldback with valley locking operation to reduce the switching losses and minimize acoustic noise.
Extremely low input power is obtained at no-load.
Input voltage variations, excessive input voltage (overvoltage like surges or bursts) and insufficient input voltage are managed by the HVLED101 protections, which improve the reliability of the application.
Output short-circuit and overload protection with auto restart behavior is implemented.
Features
- Input voltage: Vin: 90 - 265 Vrms, f: 45-66 Hz
- Output voltage 60 V / 833 mA
- High power factor, low THD
- Efficiency > 50% in stand-by (Pout = 240 mW)
- 4 points (25%, 50%, 75%, 100% load) average efficiency > 91%
- Frequency foldback with valley locking for noise-free operation
- TAMB-MAX = 60 °C
- Open load voltage limiting (< 65V)
- Short-circuit protection with auto restart
- NTC overtemperature protection for switching MOSFET
- Safety: Acc. to EN60065
- EMI: Acc. to EN55022 – conducted emissions
- RoHS compliant
EVLHV101SSR50W - 50 W converter using HVLED101 quasi resonant HPF flyback controller with secondary side regulation
It can be used as a standalone power supply or as a front end stage in a dimmable (or non-dimmable) off line LED driver.
A very high power factor, low THD and low BOM cost are obtained from this demonstration board thanks to the features of the HVLED101, which adopts frequency foldback with valley locking operation to reduce the switching losses and minimize acoustic noise.
Extremely low input power is obtained at no-load.
Input voltage variations, excessive input voltage (overvoltage like surges or bursts) and insufficient input voltage are managed by the HVLED101 protections, which improve the reliability of the application.
Output short-circuit and overload protection with auto restart behavior is implemented.
Features
- Input voltage: Vin: 90 - 265 Vrms, f: 45-66 Hz
- Output voltage 60 V / 833 mA
- High power factor, low THD
- Efficiency > 50% in stand-by (Pout = 240 mW)
- 4 points (25%, 50%, 75%, 100% load) average efficiency > 91%
- Frequency foldback with valley locking for noise-free operation
- TAMB-MAX = 60 °C
- Open load voltage limiting (< 65V)
- Short-circuit protection with auto restart
- NTC overtemperature protection for switching MOSFET
- Safety: Acc. to EN60065
- EMI: Acc. to EN55022 – conducted emissions
- RoHS compliant
silica content library/npi/2023/stmicroelectronics-hvled101
STMicroelectronics HVLED101 Flyback Controller | Avnet Silica
