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Microchip Technology HV9931LG-G
- Part No.:
- HV9931LG-G
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
HV9931LG-G.pdf
- Description:
- IC LED DRIVER OFFL PWM 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,384
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Product details
Overview
HV9931LG-G from Microchip Technology is a constant-output-current LED driver IC designed for single-stage PFC buck-boost-buck topology operation, supporting 85–264 VAC input, delivering unity power factor, <10% THD, and fixed 100 kHz switching frequency (RT = 226 kΩ). It integrates a 450 V linear regulator, dual current sensing (CS1/CS2), and PWM/phase dimming capability for high-reliability offline LED lighting.
For engineers reviewing the HV9931LG-G datasheet, HV9931LG-G pinout, HV9931LG-G application, or HV9931LG-G equivalent, key selection criteria include its open-loop peak current control architecture, capacitive isolation safety feature, 7.5 V internal VDD regulation, –40°C to +85°C operating range, and compatibility with non-electrolytic output filtering in streetlamp and traffic signal designs.
Technical Context
The HV9931LG-G implements open-loop peak current-mode control using two matched comparators-one regulating input inductor current (CS1) and the other output LED current (CS2)-enabling inherent input undervoltage protection and eliminating loop compensation. Its patented cascaded buck-boost-buck topology decouples output load from AC input via a middle capacitor, enabling failure-safe operation during MOSFET failure.
It supports dual operating modes: fixed-frequency (via RT-to-GND resistor) or constant off-time (via RT-to-GATE resistor), with leading-edge blanking (215 ns typ.) and 150–300 ns CS-trip-to-GATE delay. The integrated 450 V linear regulator powers internal circuitry directly from VIN, while VDD serves as both supply rail and current-sense reference voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Single-stage PFC buck-boost-buck - enables transformerless 85–264 VAC operation with unity PF and low THD |
| Switching Frequency | 100 kHz typical (RT = 226 kΩ) - balances EMI, efficiency, and magnetics size for LED lamp drivers |
| VDD Regulation | 7.5 V ±0.38 V - internally regulated supply derived from VIN; used as reference for current sense comparators |
| Current Sensing | Dual inputs (CS1, CS2) with ±15 mV offset - enables independent input inductor and output LED current regulation |
| Dimming Interface | PWMD pin accepts 0–100% duty cycle TTL signal up to few kHz - supports both PWM and phase-cut wall dimmer compatibility |
| Operating Temperature | –40°C to +85°C ambient - qualified for outdoor and industrial LED fixture environments |
| Package Thermal Resistance | θJA = 101°C/W (SOIC-8) - defines maximum power dissipation (650 mW at 25°C) under natural convection |
Pinout & Package
HV9931LG-G is housed in an 8-lead SOIC (Small Outline Integrated Circuit) package with standard 1.27 mm pitch, RoHS-compliant matte tin (Pb-free) finish, and 3300 units per reel.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | High-voltage input | Accepts 8–450 V DC; powers internal 450 V linear regulator - enables direct connection to rectified AC line |
| CS1 (Pin 2) | Input current sense input | Inverting comparator input for input inductor current limiting - ensures safe start-up and line overcurrent protection |
| GND (Pin 3) | Power and signal ground | Common return for all internal circuits and external power train - must be low-impedance connection to minimize noise coupling |
| GATE (Pin 4) | MOSFET gate driver output | Drives external N-channel MOSFET with 7.5 V logic swing, 30–50 ns rise/fall time - optimized for fast switching with minimal gate charge loss |
| PWMD (Pin 5) | PWM dimming control | TTL-compatible enable/disable input - pulls low to halt switching instantly without full restart, enabling sub-millisecond dimming response |
| VDD (Pin 6) | Internal supply rail | 7.5 V regulated output; powers all internal blocks and serves as reference for CS comparators - requires ≥0.1 µF low-ESR bypass capacitor |
| CS2 (Pin 7) | Output current sense input | Inverting comparator input for LED current regulation - sets precise constant-current output via RCS2/RS2 resistor network |
| RT (Pin 8) | Oscillator timing control | Configures switching frequency (RT-to-GND) or constant off-time (RT-to-GATE) - enables flexible trade-off between line regulation and component stress |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive isolation architecture | Decouples LED load from AC line via middle capacitor - prevents LED failure during MOSFET short-circuit events |
| Open-loop peak current control | Eliminates need for error amplifier compensation - simplifies design, improves reliability, and inherently limits inrush current |
| Unity power factor & low THD | Meets IEC 61000-3-2 Class C requirements for lighting equipment - reduces upstream filter burden and improves grid compatibility |
| Programmable dimming interface | PWMD pin supports both digital PWM and analog phase-cut dimming - enables drop-in replacement in legacy TRIAC-dimmable fixtures |
| Non-electrolytic capacitor support | Reduces reliance on electrolytic bulk capacitors - extends system lifetime in high-temperature outdoor applications like streetlamps |
Applications
| Street Lighting | Traffic Signals |
|---|---|
Use Scenario: Outdoor LED luminaires powered directly from 120/230 VAC mains with thermal cycling and long service life requirements. IC Role / Device Role / Timing Role: Primary controller for single-stage PFC buck-boost-buck converter - regulates LED current while maintaining unity PF and low THD across universal input range. Use Value: Enables transformerless design with capacitive isolation, improving MTBF by eliminating electrolytic capacitors and reducing component count by >30% vs. two-stage solutions. | Use Scenario: Red/amber/green LED signal heads requiring flicker-free operation, high reliability, and compatibility with existing phase-dimming infrastructure. IC Role / Device Role / Timing Role: Constant-current driver with phase-dimming interface - synchronizes LED output dimming with AC zero-crossing to avoid visible flicker under wall dimmers. Use Value: Delivers stable 100 kHz switching and fast PWMD response (<1 ms), ensuring smooth dimming down to 5% brightness without color shift or audible noise. |
| Decorative Lighting | Offline LED Lamps |
Use Scenario: Architectural and façade lighting systems requiring compact, high-efficiency drivers with wide dimming range and low EMI. IC Role / Device Role / Timing Role: Fixed-frequency PWM controller managing buck-boost-buck power stage - provides continuous output current with minimal ripple for uniform light output. Use Value: Achieves <10% input current THD and meets FCC Class B conducted emissions with simple filtering - reduces BOM cost and layout area vs. multi-stage alternatives. | Use Scenario: Retrofit A19 and PAR30 LED bulbs needing high step-down ratio, small form factor, and compliance with ENERGY STAR and DLC standards. IC Role / Device Role / Timing Role: Integrated LED driver IC with internal 450 V regulator - eliminates auxiliary supply and enables direct VIN powering from rectified AC. Use Value: Supports 85–264 VAC input with >90% efficiency and >0.95 PF - meets global regulatory requirements while minimizing thermal derating in enclosed bulb housings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar constant-current LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NCL30001DR2G | Fixed-frequency flyback PFC controller with external MOSFET; no integrated high-voltage regulator - requires auxiliary supply | Targets lower-power (<25 W) LED lamps; lacks native phase-dimming support - needs external circuitry for TRIAC compatibility | Choose when designing cost-sensitive, low-wattage retrofit bulbs where flyback topology suffices and auxiliary winding is acceptable |
| Diodes Incorporated AL9910AXTDT-13 | Linear LED driver with built-in MOSFET; operates only in constant-current linear mode - no switching, no PFC, limited to low-VF strings | Suitable only for 12–24 VDC input or low-line AC with series impedance - cannot handle universal 85–264 VAC directly | Choose only for ultra-low-cost, low-power indicator or accent lighting with DC or low-AC input; not a functional substitute for HV9931LG-G's AC-direct capability |
Compared with NCL30001DR2G and AL9910AXTDT-13, HV9931LG-G uniquely combines universal AC input handling, integrated 450 V regulator, capacitive isolation, and native phase-dimming support in a single SOIC-8 package - making it the only option among the three capable of transformerless, high-reliability streetlamp and traffic signal designs.
Availability
HV9931LG-G is available at Aetrix Electronics and suitable for street lighting, traffic signals, and decorative LED fixtures requiring stable component supply, long-lifecycle assurance, and RoHS-compliant manufacturing.
Supply support for HV9931LG-G includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and power management ICs, with a focus on reliability, longevity, and industrial-grade qualification.
The HV9931LG-G belongs to Microchip's Unity Power Factor LED Lamp Driver product line, engineered specifically for high-efficiency, transformerless AC-LED drivers targeting outdoor and infrastructure lighting where safety, PF, and dimming interoperability are critical.
FAQ
What is the maximum input voltage rating for HV9931LG-G?
HV9931LG-G has an absolute maximum VIN-to-GND rating of +470 V, with operational DC input voltage range specified from 8 V to 450 V. This allows direct connection to rectified 264 VAC mains (≈370 VDC peak) with margin for transients. Operation above 450 V risks permanent damage per Absolute Maximum Ratings.
Does HV9931LG-G require an external power supply for VDD?
No - HV9931LG-G features an internal 450 V linear regulator that derives VDD (7.5 V) directly from the VIN pin. An external supply is optional: applying >7.88 V to VDD disables the internal regulator and powers the IC externally, useful in cold-crank automotive scenarios where VIN may dip below 8 V.
How does HV9931LG-G achieve unity power factor without a dedicated PFC controller?
HV9931LG-G achieves unity PF through its proprietary single-stage buck-boost-buck topology and open-loop peak current control. By shaping input current via the first stage's duty cycle and leveraging the middle capacitor's energy transfer, it inherently delivers sinusoidal line current with <10% THD - eliminating need for separate boost-PFC stages.
Can HV9931LG-G drive multiple LEDs in series?
Yes - HV9931LG-G regulates output current, not voltage; it can drive any number of series-connected LEDs as long as the total forward voltage remains within the buck stage's output capability (determined by L2, C1, and input/output voltage relationship). Typical designs support 10–50 V LED strings at up to 1 A.
What is the purpose of the leading-edge blanking (LEB) in HV9931LG-G?
HV9931LG-G incorporates 215 ns typical leading-edge blanking on both CS1 and CS2 inputs to suppress gate-drive switching noise spikes during MOSFET turn-on. This prevents false current-sense triggering and ensures accurate peak current detection - critical for stable regulation and overcurrent protection.
HV9931LG-G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- AC DC Offline Switcher
- Topology:
- Step-Down (Buck), Step-Up (Boost)
- Internal Switch(s):
- No
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 8V
- Voltage - Supply (Max):
- 450V
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- 100kHz
- Dimming:
- PWM
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
HV9931LG-G FAQ
1.How can I place an order for HV9931LG-G through Aetrix?
Please submit a Request for Quotation (RFQ) for HV9931LG-G on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for HV9931LG-G reliable?
The price and inventory of HV9931LG-G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HV9931LG-G is usually 5 days.
3.What payment methods are accepted for HV9931LG-G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HV9931LG-G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HV9931LG-G?
HV9931LG-G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HV9931LG-G order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for HV9931LG-G?
For technical support, including HV9931LG-G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HV9931LG-G requirements.
6.How does Aetrix verify that HV9931LG-G is sourced from the original manufacturer or authorized distributors?
All HV9931LG-G products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that HV9931LG-G meets industry standards.
7.What is the process for return or replacement of HV9931LG-G?
All HV9931LG-G units undergo pre-shipment inspection (PSI). If there is an issue with HV9931LG-G, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The HV9931LG-G part is unused and in its original packaging.
Return procedure for HV9931LG-G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HV9931LG-G Tags
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BCR402RE6327HTSA1
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BCR430UXTSA2
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