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Microchip Technology HV9923N3-G
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- Part No.:
- HV9923N3-G
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
HV9923N3-G.pdf
- Description:
- IC LED DRV OFFL TRIAC TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:553
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Product details
Overview
HV9923N3-G from Microchip Technology is a 3-pin, fixed off-time buck-mode LED driver IC with integrated 475V MOSFET, delivering constant 30mA output current for universal AC input (85–264VAC) or DC input (20–400VDC) operation in decorative and low-power lighting fixtures.
For engineers reviewing the HV9923N3-G datasheet, HV9923N3-G pinout, HV9923N3-G application, or HV9923N3-G equivalent, this page provides verified technical context, package mapping to TO-92, confirmed 30mA current regulation, 10.5μs typical off-time, and validated alternatives for LED lamp driver design.
Technical Context
The HV9923N3-G implements a peak-current-controlled, fixed off-time (TOFF ≈ 10.5μs) buck converter operating in continuous conduction mode (CCM), using an internal 475V MOSFET with 210Ω typical RON. It integrates a 7.5V VDD linear regulator powered from the DRAIN pin and features 300ns leading-edge blanking to suppress false triggering.
Current regulation is achieved via internal threshold comparison (ITHL = 28.2–38.2mA) against sensed drain current, with UVLO at 5.0V and 200mV hysteresis. The device requires no external current-sense resistor and supports triac dimmer compatibility in AC-fed configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Fixed 30mA - enables stable illumination without external sensing components |
| Input Voltage Range | 85–264VAC / 20–400VDC - supports global mains operation without auxiliary supply |
| Off-Time (TOFF) | 8–13μs (typ. 10.5μs) - determines switching frequency inversely with input-output voltage differential |
| MOSFET Breakdown | 475V - allows direct connection to rectified AC line without external HV switch |
| VDD Regulation | 7.5V - powers internal circuitry from DRAIN pin, eliminating need for auxiliary winding |
| UVLO Threshold | 5.0V with 200mV hysteresis - ensures clean startup and prevents oscillation near turn-on |
| Operating Temp | −40°C to +125°C junction - suitable for enclosed lighting environments with thermal stress |
Pinout & Package
Package: TO-92 (3-lead plastic through-hole), marked "HV9923 N3 e3", with thermal resistance θJA = 132°C/W on standard FR4 board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Drain) | High-voltage switch node and regulator input | Connects to rectified AC/DC input; supplies internal VDD regulator and carries full LED string current |
| 2 (GND) | Common reference for control and power circuits | Single-point ground connection required for EMI control and current sense accuracy |
| 3 (VDD) | Internal regulator output and logic supply | Bypassed with 0.1μF capacitor; powers all control circuitry including RS flip-flop and comparator |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 475V MOSFET | Eliminates external high-voltage switch and associated gate drive complexity |
| Fixed 30mA current setting | Removes need for external current-sense resistor and calibration |
| 10.5μs typical off-time | Enables predictable switching frequency scaling across wide input voltage range |
| 300ns leading-edge blanking | Prevents false current-limit triggering caused by parasitic turn-on spikes |
| Triac dimmer compatibility | Supports phase-cut dimming in AC-powered lamps without additional circuitry |
Applications
| Decorative Lighting | Low-Power Fixtures |
|---|---|
Use Scenario: LED string illumination in architectural accent strips, signage, and holiday lighting powered directly from AC mains. IC Role / Device Role / Timing Role: Constant-current buck controller regulating 30mA through series-connected LEDs using fixed off-time PWM. Use Value: Delivers uniform brightness and long-term reliability without external current-sense components or auxiliary power supplies. | Use Scenario: Replacement of incandescent bulbs in ceiling-mounted or wall-mounted residential fixtures with universal AC input. IC Role / Device Role / Timing Role: Primary LED driver IC managing energy transfer from rectified AC line to LED load via internal 475V MOSFET and CCM buck topology. Use Value: Enables compact, cost-effective, single-stage offline LED drivers meeting safety isolation requirements without transformer. |
| Triac-Dimmable Lamps | Enclosed LED Modules |
Use Scenario: Retrofit A19 or GU10 LED lamps requiring smooth dimming performance across standard wall-mounted triac dimmers. IC Role / Device Role / Timing Role: Off-line buck controller with inherent phase-cut compatibility, maintaining stable 30mA output despite distorted input waveforms. Use Value: Achieves flicker-free dimming down to 10% without auxiliary synchronization circuitry or complex compensation. | Use Scenario: Sealed LED modules in outdoor or industrial enclosures where thermal management and component count are critical. IC Role / Device Role / Timing Role: Primary power stage controller dissipating <186mW at 265VAC, operating up to 125°C junction temperature in TO-92 package. Use Value: Reduces BOM count by integrating HV switch and regulator, while enabling reliable operation in thermally constrained spaces. |
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 | External MOSFET required; adjustable current (10–150mA); 600V rating | Requires current-set resistor and gate driver; better suited for higher-power or programmable designs | Choose when design flexibility or >30mA output is needed; not drop-in due to external FET requirement |
| MPQ4425AGU-AEC1-P | 40V max input; synchronous buck; requires external current sense; automotive-grade | Limited to low-voltage DC input; includes fault protection and spread-spectrum EMI reduction | Use only in 12–48V DC systems requiring AEC-Q100 qualification; incompatible with AC line operation |
Compared with AL8862SP-13 and MPQ4425AGU-AEC1-P, the HV9923N3-G uniquely integrates a 475V MOSFET and fixed 30mA regulation for direct AC-line operation in space-constrained TO-92 packages-offering lowest BOM count and simplest layout for universal-input decorative lighting.
Availability
HV9923N3-G is available at Aetrix Electronics and suitable for decorative lighting, low-power fixtures, triac-dimmable lamps, and enclosed LED modules requiring stable component supply across extended production cycles.
Supply support for HV9923N3-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 manufacturer specializing in microcontrollers, analog devices, and power management ICs, with ISO/TS-16949:2009 certification across wafer fabrication and design centers.
The HV9923N3-G belongs to Microchip's HV99xx family of monolithic offline LED drivers, designed specifically for cost-sensitive, single-stage AC/DC LED lighting applications where integration, reliability, and triac dimmer compatibility are essential.
FAQ
What is the maximum input voltage the HV9923N3-G can handle?
The HV9923N3-G supports input voltages up to 400VDC or 264VAC RMS (≈373V peak). Its internal 475V MOSFET breakdown voltage provides sufficient margin for transient surges on universal AC lines. Operation beyond 400VDC risks exceeding absolute maximum ratings and may cause permanent damage.
Does the HV9923N3-G require an external current-sense resistor?
No, the HV9923N3-G does not require an external current-sense resistor. It uses internal peak-current sensing with a factory-trimmed threshold of 28.2–38.2mA to regulate LED current at 30mA. This eliminates component count, layout sensitivity, and tolerance drift associated with external resistors.
Can the HV9923N3-G be used with triac dimmers?
Yes, the HV9923N3-G is explicitly designed for triac dimmer compatibility in AC-powered LED lamps. Its fixed off-time control architecture maintains stable 30mA output despite phase-cut waveform distortion, enabling smooth dimming without auxiliary synchronization or complex compensation networks.
What package type is used for the HV9923N3-G?
The HV9923N3-G uses the TO-92 package (3-lead through-hole), identified by the "N3" suffix per Microchip's part numbering system. It features a thermal resistance of 132°C/W and is marked "HV9923 N3 e3" with Pb-free matte tin plating compliant with ROHS.
How is the VDD supply generated in the HV9923N3-G?
The HV9923N3-G generates its VDD supply internally from the DRAIN pin via an integrated high-voltage linear regulator that delivers a regulated 7.5V output. This eliminates the need for an auxiliary winding or external bias supply, simplifying design and reducing component count in offline LED drivers.
HV9923N3-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:
- 30mA
- Frequency:
- -
- Dimming:
- Triac
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
HV9923N3-G FAQ
1.How can I place an order for HV9923N3-G through Aetrix?
Please submit a Request for Quotation (RFQ) for HV9923N3-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 HV9923N3-G reliable?
The price and inventory of HV9923N3-G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HV9923N3-G is usually 5 days.
3.What payment methods are accepted for HV9923N3-G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HV9923N3-G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HV9923N3-G?
HV9923N3-G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HV9923N3-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 HV9923N3-G?
For technical support, including HV9923N3-G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HV9923N3-G requirements.
6.How does Aetrix verify that HV9923N3-G is sourced from the original manufacturer or authorized distributors?
All HV9923N3-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 HV9923N3-G meets industry standards.
7.What is the process for return or replacement of HV9923N3-G?
All HV9923N3-G units undergo pre-shipment inspection (PSI). If there is an issue with HV9923N3-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 HV9923N3-G part is unused and in its original packaging.
Return procedure for HV9923N3-G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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