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Product Detailed Parameters
- Description：IC LED DRIVER CTRLR PWM 8SOIC
- Series：-
- Mfr：Microchip Technology
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：DC DC Controller
- Topology：Step-Down (Buck)
- Internal Switch(s)：No
- Number of Outputs：1
- Voltage - Supply (Min)：15V
- Voltage - Supply (Max)：450V
- Voltage - Output：-
- Current - Output / Channel：-
- Frequency：-
- Dimming：Analog, PWM
- Applications：Backlight, Lighting, Signage
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SOIC
- Grade：-
- Qualification：-
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Overview
The HV9861ALG-G is a patented average-mode, constant current control LED driver IC from Microchip Technology. It operates in a constant off-time mode to drive high-voltage LEDs. The device features analog and PWM dimming capabilities and utilizes a buck topology for DC-DC conversion. Packaged in an 8-SOIC format, it supports input voltages ranging from 12 V to 450 V. This component is designed to improve LED current accuracy and regulation without requiring loop compensation or high-side current sensing.
Feature Summary
- Patented average-mode constant current control eliminates peak-to-average error for improved accuracy
- Operates in constant off-time mode to enhance line and load regulation
- Supports both analog and PWM dimming methods for flexible brightness control
- Eliminates the need for external loop compensation or high-side current sensing
Applications
- High-voltage LED lighting systems
- AC/DC LED drivers
- General illumination applications requiring precise current control
Procurement Notes
Verify the specific suffix 'LG' confirms the tape-and-reel packaging variant when ordering. Confirm the operating voltage range aligns with your system design, as inputs span up to 450 V. Check for end-of-life status or obsolescence notices from Microchip Technology prior to finalizing procurement plans. Ensure ESD protection protocols are followed during handling of the SOIC package.
Selection Notes
Select this component when high-voltage LED driving requires precise average-mode control without complex compensation networks. It is suitable for designs needing integrated PWM dimming and robust line regulation. Consider the 8-SOIC package constraints and thermal dissipation requirements. Verify compatibility with the intended input voltage range before implementation.
Part Context
This part belongs to the HV9861A family of LED drivers. It shares core functionality with variants like the HV9861ANG-G but differs in packaging and reel specifications. The series focuses on average-mode control to address limitations found in previous peak-current mode controllers.
Replacement Considerations
Direct substitutes include other HV9861A variants such as HV9861ANG-G, noting differences in tube versus reel packaging. Cross-reference with HV9910B if peak-to-average error tolerance allows, though functional behavior differs significantly.
