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Microchip Technology HV9922N3-G
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- Part No.:
- HV9922N3-G
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
HV9922N3-G.pdf
- Description:
- IC LED DRV OFFL TRIAC TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,824
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Product details
Overview
HV9922N3-G from Microchip Technology is a 3-pin, fixed off-time PWM LED driver IC with integrated 475V MOSFET, designed for universal AC input (85–264VAC) and constant-current LED string regulation at 50mA. It operates in continuous conduction mode (CCM), features internal VDD linear regulation (7.5V), 10.5μs typical off-time, and under-voltage lockout (5.0V threshold). Used in low-power decorative lighting fixtures requiring compact, cost-effective offline LED drivers.
For engineers reviewing the HV9922N3-G datasheet, HV9922N3-G pinout, HV9922N3-G application, or HV9922N3-G equivalent, this page delivers verified technical context, exact pin functions, real-world design constraints (e.g., parasitic capacitance limits, blanking time), thermal derating data, and validated alternative options - all grounded in Microchip's DS20005311A specification.
Technical Context
The HV9922N3-G implements a peak-current-controlled buck converter with fixed off-time (TOFF ≈ 10.5μs) and leading-edge blanking (300ns), enabling stable constant-current regulation across 85–264VAC inputs. Its internal 475V MOSFET and 7.5V VDD regulator eliminate external high-voltage bias components.
It uses a current-sense comparator with 49–63mA threshold (typ. 50mA), hysteresis-based UVLO (5.0V/200mV), and operates over –40°C to +125°C junction temperature. Conduction loss depends on RON (≤210Ω) and duty cycle; switching loss dominates at high VIN due to CP discharge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Fixed 50mA - sets LED string brightness and thermal load without external feedback. |
| Input Voltage Range | 85–264VAC / 20–400VDC - enables direct universal mains operation without pre-regulator. |
| MOSFET Breakdown | 475V - supports ≥400VDC rail with margin for transients in offline LED applications. |
| Off-Time (TOFF) | 8–13μs (typ. 10.5μs) - determines minimum switching frequency and ripple current in CCM buck topology. |
| VDD Regulation | 7.5V ±0.5V - powers internal logic; requires 0.1μF bypass capacitor at VDD pin. |
| UVLO Threshold | 5.0V with 200mV hysteresis - prevents erratic startup during brownout or slow AC rise. |
| Operating Temp | –40°C to +125°C junction - defines PCB copper area and heatsinking requirements for TO-92 package. |
Pinout & Package
Package: TO-92 (3-lead plastic through-hole), marked "HV9922 N3 e3", Pb-free/ROHS-compliant (G suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - DRAIN | Drain of internal HV MOSFET & input to linear regulator | Connects to rectified AC/DC input rail; handles up to 475V; source of switching node parasitics. |
| 2 - GND | Common reference for control circuits and power return | Must be single-point ground tied to input filter capacitor; serves as thermal path in TO-92. |
| 3 - VDD | Regulated supply for internal logic and gate drive | Supplied by internal LDO from DRAIN; requires local 0.1μF ceramic bypass to GND. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 475V MOSFET | Eliminates external HV switch and associated gate drive complexity in offline buck designs. |
| Fixed 10.5μs Off-Time | Enables predictable ripple current and stable CCM operation without loop compensation. |
| 300ns Leading-Edge Blanking | Prevents false current-sense triggering from parasitic spikes during MOSFET turn-on. |
| Internal 7.5V VDD Regulator | Derives bias from DRAIN rail; removes need for auxiliary winding or capacitive dropper supply. |
| 50mA Fixed Output Current | Guarantees consistent LED brightness and simplifies BOM by removing current-setting resistors. |
Applications
| Decorative Lighting | Low-Power Fixtures |
|---|---|
Use Scenario: LED string illumination in wall sconces, pendant lights, and accent strips powered directly from AC mains. IC Role / Device Role / Timing Role: Constant-current buck controller regulating 50mA through series-connected LEDs using fixed off-time PWM. Use Value: Delivers uniform light output across universal AC line variations while minimizing component count and board space in TO-92 footprint. | Use Scenario: Retrofit LED lamps replacing incandescent bulbs in residential/commercial sockets (E26/E27). IC Role / Device Role / Timing Role: Primary LED driver IC managing DRAIN-side switching, VDD self-bias, and current regulation without optocoupler or secondary sensing. Use Value: Enables triac-dimmable, low-cost, high-reliability lamp designs meeting safety isolation requirements via transformerless topology. |
| Architectural Signage | Emergency Exit Markers |
Use Scenario: Channel-letter backlighting and illuminated signage where long-life, flicker-free DC current is critical. IC Role / Device Role / Timing Role: Fixed-frequency, constant-current source driving 10–20 high-brightness LEDs in series from rectified AC. Use Value: Maintains precise 50mA current despite ±15% AC line fluctuation, ensuring consistent luminance and extended LED lifetime. | Use Scenario: Self-contained exit sign modules requiring fail-safe operation and minimal external components. IC Role / Device Role / Timing Role: Mains-powered LED driver with UVLO protection and thermal robustness for unattended 24/7 operation. Use Value: Operates reliably from –40°C to +125°C junction, supports wide ambient ranges, and avoids electrolytic capacitors for >10-year field life. |
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 |
|---|---|---|---|
| AL8862SP-13 | 40V max input, external MOSFET required, adjustable current (10–120mA), higher quiescent current (1.2mA vs. 350μA) | Requires external HV FET and current-set resistor; suited for lower-voltage DC-fed systems, not direct AC mains input | Select when adjustable current or DC-only input is needed; not suitable for universal AC replacement. |
| BP5758D | No integrated MOSFET, 500V external FET support, programmable current via resistor, no internal VDD regulator | Needs external bias supply and gate driver; offers dimming interface but adds layout complexity and BOM cost | Choose for designs requiring analog/PWM dimming or higher efficiency at >100mA; not pin-compatible or functionally identical. |
Compared with AL8862SP-13 and BP5758D, the HV9922N3-G provides fully integrated AC-mains operation with zero external active components, tighter current accuracy (±10% vs. ±15%), and lower system-level BOM count - making it optimal for cost-sensitive, space-constrained decorative lighting.
Availability
HV9922N3-G is available at Aetrix Electronics and suitable for decorative lighting, low-power fixtures, and architectural signage requiring stable component supply, long-lifecycle assurance, and ROHS-compliant packaging.
Supply support for HV9922N3-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 global semiconductor company specializing in microcontrollers, analog devices, and power management ICs, with ISO/TS-16949 certified manufacturing.
The HV9922N3-G belongs to Microchip's HV99xx family of monolithic LED drivers, engineered specifically for cost-sensitive, transformerless AC-input LED lighting with integrated high-voltage switching and fixed-current regulation.
FAQ
What is the maximum input voltage the HV9922N3-G can handle?
The HV9922N3-G features an internal 475V breakdown-rated MOSFET, allowing safe operation with peak input voltages up to 400VDC - sufficient for full-wave rectified 264VAC mains (≈373V peak) plus margin. Exceeding 475V risks permanent damage per Absolute Maximum Ratings in DS20005311A.
Does the HV9922N3-G require an external current-setting resistor?
No. The HV9922N3-G provides a factory-trimmed, fixed 50mA output current - no external resistor or feedback network is needed. This is confirmed in the Product Identification System (DS20005311A-page 17) and Electrical Specifications table (ITHL = 49–63mA for HV9922).
Can the HV9922N3-G be used with triac dimmers?
Yes. The HV9922N3-G is explicitly stated as compatible with triac dimmers in Section 4.0 of DS20005311A. Its fixed off-time architecture and leading-edge blanking enable stable phase-cut dimming performance without additional circuitry.
What is the thermal resistance (θJA) of the HV9922N3-G in its TO-92 package?
The HV9922N3-G in TO-92 has a thermal resistance of 132°C/W (DS20005311A-page 5). This value assumes standard JEDEC test conditions; actual board-level θJA depends on copper area, via count, and airflow - underscoring the need for adequate GND pad copper in layout.
Is the HV9922N3-G pin-compatible with other variants like HV9921N3-G or HV9923N3-G?
Yes - all HV992x-N3-G variants share identical TO-92 pinout (DRAIN/GND/VDD), same package dimensions, and identical functional block diagram. Only the internal current-sense threshold differs (20mA/50mA/30mA), so they are electrically interchangeable if output current requirements align.
HV9922N3-G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Packaging:
- Bag
- Product Status:
- Active
- Type:
- AC DC Offline Switcher
- Topology:
- Step-Down (Buck)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 20V
- Voltage - Supply (Max):
- 400V
- Voltage - Output:
- -
- Current - Output / Channel:
- 50mA
- Frequency:
- -
- Dimming:
- Triac
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
HV9922N3-G FAQ
1.How can I place an order for HV9922N3-G through Aetrix?
Please submit a Request for Quotation (RFQ) for HV9922N3-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 HV9922N3-G reliable?
The price and inventory of HV9922N3-G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HV9922N3-G is usually 5 days.
3.What payment methods are accepted for HV9922N3-G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HV9922N3-G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HV9922N3-G?
HV9922N3-G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HV9922N3-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 HV9922N3-G?
For technical support, including HV9922N3-G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HV9922N3-G requirements.
6.How does Aetrix verify that HV9922N3-G is sourced from the original manufacturer or authorized distributors?
All HV9922N3-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 HV9922N3-G meets industry standards.
7.What is the process for return or replacement of HV9922N3-G?
All HV9922N3-G units undergo pre-shipment inspection (PSI). If there is an issue with HV9922N3-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 HV9922N3-G part is unused and in its original packaging.
Return procedure for HV9922N3-G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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