HV9925SG-G Integrated Circuits (ICs) |
|
| Allicdata Part #: | HV9925SG-GTR-ND |
| Manufacturer Part#: |
HV9925SG-G |
| Price: | $ 0.00 |
| Product Category: | Integrated Circuits (ICs) |
| Manufacturer: | Microchip Technology |
| Short Description: | IC LED DRVR OFFL DIM 50MA 8SOIC |
| More Detail: | LED Driver IC 1 Output AC DC Offline Switcher Step... |
| DataSheet: |  HV9925SG-G Datasheet/PDF |
| Quantity: | 1000 |
Specifications
| Voltage - Output: | -- |
| Base Part Number: | HV9925 |
| Supplier Device Package: | 8-SOIC |
| Package / Case: | 8-SOIC (0.154", 3.90mm Width) Exposed Pad |
| Mounting Type: | Surface Mount |
| Operating Temperature: | -40°C ~ 85°C (TA) |
| Applications: | Lighting |
| Dimming: | PWM |
| Frequency: | -- |
| Current - Output / Channel: | 50mA |
| Series: | -- |
| Voltage - Supply (Max): | 400V |
| Voltage - Supply (Min): | 20V |
| Number of Outputs: | 1 |
| Internal Switch(s): | Yes |
| Topology: | Step-Down (Buck) |
| Type: | AC DC Offline Switcher |
| Part Status: | Active |
| Packaging: | Tape & Reel (TR) |
Description
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The HV9925SG-G is an integrated high voltage source, specifically designed to drive light emitting diodes (LEDs). It belongs to the category of Power Management IC and LED Drivers and has many applications such as energy saving, display and backlighting applications. This article will provide an overview of the application field and working principle of the HV9925SG-G.
Application Field
The HV9925SG-G is designed to drive single or multiple high efficiency LEDs directly from a mains AC supply. With its level shifting circuit, the device can operate with AC input voltages from up to 340V AC. Additionally, the HV9925SG-G can be used both in Universal Line (90 to 265V AC) or Single Line (170 to 340V AC) applications. The device is capable of delivering a maximum LED current of 200 mA and a current regulation accuracy of 2.4%. It has an adjustable supply voltage, between 20V and 50V and an adjustable frequency, between 10 kHz and 50 kHz.The HV9925SG-G also features a low start-up current of 70 µA, allowing a higher efficiency in lower power applications. Moreover, this device has an adjustable soft-start time ranging from 0.1 sec to 1 sec with a programmable current-limit and open-circuit protection. Additionally, the HV9925SG-G contains various current levels such as standby, low and normal levels.Working Principle
The HV9925SG-G is an integrated high voltage source designed to drive single or multiple high efficiency LEDs directly from an AC power source. The device contains three main components: an AC to DC converter, a DC to DC converter and a voltage doubler.The AC to DC converter takes the AC supply and converts it into a low voltage DC signal. This signal is then fed to the DC to DC converter which, in turn, converts it into a high voltage DC signal. The output of this converter is then applied to the voltage doubler which further steps-up the voltage to the desired level.The output of the voltage doubler is then applied to the LED string, allowing for a higher current output which would otherwise not be possible. Moreover, the HV9925SG-G includes adaptive frequency and jitter control, helping to reduce EMI and output ripple.Conclusion
The HV9925SG-G is an integrated high voltage source, designed to drive single or multiple high efficiency LEDs directly from an AC power source. This device is designed with a level shifting circuit, allowing it to operate with AC input voltages from up to 340V AC. Additionally, the HV9925SG-G features adaptive frequency and jitter control, helping to reduce both EMI and output ripple. Furthermore, this device is capable of delivering a maximum LED current of 200 mA, with a current regulation accuracy of 2.4%. Therefore, the HV9925SG-G is highly suitable for energy saving, display and backlighting applications and is a great option for those looking for a reliable and efficient LED driver.The specific data is subject to PDF, and the above content is for reference
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