HV9971LG-G

Voltage - Output:	--
Base Part Number:	HV9971
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TA)
Applications:	--
Dimming:	PWM
Frequency:	100kHz
Current - Output / Channel:	--
Series:	--
Voltage - Supply (Max):	264VAC
Voltage - Supply (Min):	80VAC
Number of Outputs:	1
Internal Switch(s):	No
Topology:	Flyback
Type:	AC DC Offline Switcher
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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The HV9971LG-G is a central component in the field of PMIC - LED Drivers. It is designed to drive power LEDs in lighting systems, such as commercial and residential lighting. The device functions as a buck regulator, which efficiently converts a constant input voltage into a constant output current suitable for powering LEDs.The component is capable of accurately controlling the current flow to the LEDs, over a wide dynamic range of off to full-on states, ensuring optimal and consistent output. Its embedded protection features such as thermal shutdown, output over-voltage protection (OVP), and output under-voltage lockout (UVLO) make it highly suitable for stable operation.The HV9971LG-G has a few variants in its family enabling a wide range of applications for lighting systems’ needs. Different versions of the device have various maximum output current ratings that span from 40mA to 10A and various minimum input voltage ratings beginning at 8.5V and going up to 34V. The device also offers various different switching frequencies providing design flexibility while obtaining an optimal equilibrium between efficiency and noise.The HV9971LG-G’s working principle begins with an analog current-mode control feedback loop. This feedback loop enables the device to adjust the output current to a given mode of operation, depending on the sensed current in the external power LED. This is achieved by comparing an internal reference voltage with the sensed voltage on the current sense pin.When using the device, a few external components are required. The voltage divider forms a potential divider for the feedback voltage, supplying the reference voltage for the feedback loop and allowing the device to maintain a stable programmable output current. Additionally, the external reference capacitor and resistor indicate the on-time to the device and allow the current-mode architecture to function properly. The device is also able to connect with an external temperature sensor that makes efficient use of the internal thermal protection circuits if an abnormal temperature is sensed.The device has a Sleep mode, in which the device consumes nearly zero power when the Enable pin is held in a low logic state. When enabled, the device turns on and reaches the normal operation state shortly afterwards.In conclusion, the HV9971LG-G PMIC - LED Driver is packed with features, allowing for a wide range of applications. Its bolstered protection features make it suitable for safe and stable operation in many settings. Its family members with different versions of the device cover a wide range of maximum output current ratings, minimum input voltage ratings and switching frequencies, making it a versatile option for LED lighting designs.

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