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Microchip Technology HV9801ALG-G
- Part No.:
- HV9801ALG-G
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
HV9801ALG-G.pdf
- Description:
- IC LED DRIVER OFFL PWM 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,773
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Product details
Overview
HV9801ALG-G from Microchip Technology is an 8-lead SOIC switch-dimmable LED driver IC designed for AC-input LED bulbs and fixtures. It integrates a 450V-rated VDD regulator, average-current sensing with 250 mV threshold, constant off-time control, four-level discrete brightness switching via AC power cycling, and hiccup-mode short-circuit protection. It operates in continuous conduction mode (CCM) for high-efficiency buck LED regulation.
For engineers reviewing the HV9801ALG-G datasheet, HV9801ALG-G pinout, HV9801ALG-G application, or HV9801ALG-G equivalent, this device serves as a dedicated AC-line-powered LED driver with integrated dimming logic, thermal shutdown at 140°C, UVLO at 6.7 V, and programmable off-time (32–48 µs typical) - critical for stable single-stage offline LED lighting designs requiring no external microcontroller.
Technical Context
The HV9801ALG-G implements average current regulation using internal current mirroring from the VDD rail and leading-edge blanking (110–260 ns) to reject gate-drive-induced CS spikes. Its constant off-time architecture eliminates subharmonic oscillation and enables stable CCM operation across wide input voltage ranges (15–450 V).
Switch dimming is implemented via digital state machine that tracks rapid AC on/off cycles, traversing 100%, 50%, 25%, and 12.5% brightness levels bidirectionally. The IC detects power loss through VIN decay and maintains VDD >3.5 V for ≥1 s using a ≥175 µF hold-up capacitor to sustain dimming state memory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 15 V to 450 V - Directly powered from rectified AC bus; supports universal mains input without pre-regulator |
| Current Sense Threshold | 250 mV ±6 mV - Sets average LED current via RCS = 250 mV / ILED; enables <1% current tolerance vs. peak-current controllers |
| VDD Regulator Output | 7.5 V ±250 mV - Powers internal circuitry and gate driver; includes 6.7 V UVLO with 500 mV hysteresis |
| Off-time (TOFF) | 32–48 µs (RT = 226 kΩ) - Programmable via resistor; determines minimum switching frequency (~20 kHz) and enables CCM design |
| Max Duty Cycle | 80% - Limits maximum LED string voltage to 80% of bus voltage; prevents current regulation loss at high VLED/VIN ratios |
| Overtemperature Trip | 140°C ±20°C - Triggers shutdown with 20°C hysteresis; protects MOSFET and inductor under thermal stress |
| PWM Dimming Frequency | 1.2 kHz - Internally generated; enables flicker-free four-level brightness control without external timing components |
Pinout & Package
Package: 8-lead SOIC (Narrow), RoHS-compliant, Pb-free matte tin plating. Body dimensions: 4.90 × 3.90 mm, height ≤1.75 mm, pitch 1.27 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | High-voltage input supply | Connects to bridge rectifier output; powers VDD regulator and detects AC power loss for dimming state retention |
| CS (Pin 2) | Current sense input | Monitors LED current via sense resistor; triggers regulation at 250 mV and hiccup at 440 mV |
| GND (Pin 3) | Power ground reference | Common return for CS, GATE, and internal circuits; must be low-inductance path to minimize noise coupling |
| GATE (Pin 4) | External MOSFET driver output | Drives N-channel MOSFET gate with 165 mA sink/source; rise/fall time <50 ns into 500 pF load |
| RT (Pin 8) | Off-time programming input | Connects to GND via resistor (30 kΩ–1 MΩ) to set TOFF from 1.5 µs to 40.3 µs per TOFF = 40 ps/Ω × RT + 300 ns |
| VDD (Pin 6) | Regulated internal supply | 7.5 V output; requires ≥100 nF HF bypass + ≥175 µF hold-up capacitor to sustain dimming logic during AC dropout |
| DNC (Pins 5, 7) | No-connect terminals | Must remain unconnected; floating or tied to GND/VDD will impair functionality or cause malfunction |
Key Features
| Feature | Design Value |
|---|---|
| Four-level switch dimming | Enables user-adjustable brightness (100%/50%/25%/12.5%) via standard wall switch cycling - no remote or wiring changes required |
| Average current regulation | Eliminates line/load-dependent errors inherent in peak-current mode; achieves superior LED current stability across input and output variations |
| Integrated 450V VDD regulator | Directly derives bias from rectified AC, removing need for auxiliary winding or separate HV startup circuit |
| Hiccup-mode short-circuit protection | Extends off-time to 750 µs upon CS >440 mV, limiting inductor current surge and enabling safe auto-recovery after fault clearance |
| Leading-edge blanking (LEB) | 110–260 ns blanking window suppresses gate-charge transients at CS node, preventing false current-limit triggering |
Applications
| Smart Residential LED Bulbs | Commercial LED Downlights |
|---|---|
Use Scenario: Retrofit A19/E26 LED bulb replacing incandescent lamps in homes with legacy wall switches. IC Role / Device Role / Timing Role: Primary LED current controller and switch-dimming state manager; regulates buck converter in CCM while tracking AC on/off transitions. Use Value: Enables four-step brightness control using existing infrastructure - no smart hub, app, or neutral wire required. |
Use Scenario: Fixed-mount downlight in office ceiling with manual wall switch, requiring flicker-free dimming and thermal robustness. IC Role / Device Role / Timing Role: Constant-current LED driver with overtemperature shutdown and hiccup protection for sustained 24/7 operation. Use Value: Maintains consistent lumen output across ambient temperatures up to +125°C ambient, with automatic fault recovery. |
| Industrial LED High-Bays | Outdoor LED Streetlights |
Use Scenario: High-bay fixture in warehouse with 0–10 V dimming unavailable; relies solely on AC switch cycling for light level adjustment. IC Role / Device Role / Timing Role: AC-input LED driver with 450 V VIN rating and 80% max duty cycle enforcement for high-VLED strings. Use Value: Supports 48–72 V LED strings directly from 277 VAC rectified bus without intermediate DC-DC stage. |
Use Scenario: Outdoor pole-mounted streetlight exposed to wide temperature swings and lightning-induced surges. IC Role / Device Role / Timing Role: Robust LED driver with 150°C junction rating, UVLO hysteresis, and fast LEB to withstand EMI-rich environments. Use Value: Delivers reliable operation from –40°C to +125°C ambient with no firmware or external components needed for dimming or protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switch-dimmable LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HV9910B | Peak-current mode controller; no integrated VDD regulator; requires external 12 V bias; no built-in switch-dimming logic | Needs external microcontroller or logic for multi-level dimming; less accurate current regulation due to propagation delay sensitivity | Choose when designing custom dimming interface or when lower BOM cost outweighs accuracy and integration trade-offs |
| AL8862 | Constant off-time buck controller with 60 V VIN max; no HV input capability; requires external HV startup circuit | Not suitable for direct AC-line operation; limited to low-VIN DC-fed applications like 12/24 V systems | Prefer only for low-voltage DC-powered LED modules where 450 V input capability is unnecessary |
Compared with HV9910B and AL8862, the HV9801ALG-G uniquely combines 450 V input tolerance, integrated VDD regulation, and native four-level switch-dimming logic in a single 8-pin SOIC - eliminating external bias supplies, microcontrollers, and discrete dimming circuitry required by alternatives.
Availability
HV9801ALG-G is available at Aetrix Electronics and suitable for smart residential LED bulbs, commercial downlights, and industrial high-bay lighting requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for HV9801ALG-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 and broad automotive/industrial qualification.
The HV9801A product line delivers highly integrated, AC-line-powered LED drivers optimized for switch-dimmable retrofit lighting - prioritizing simplicity, reliability, and regulatory compliance in cost-sensitive consumer and commercial applications.
FAQ
What is the maximum input voltage rating for the HV9801ALG-G?
The HV9801ALG-G supports an absolute maximum input voltage (VIN) of 470 V, with operational range from 15 V to 450 V. This allows direct connection to rectified universal AC mains (90–277 VAC) without external voltage clamping or pre-regulation. The internal VDD regulator is rated for 450 V, making HV9801ALG-G suitable for single-stage offline LED driver topologies.
How does the HV9801ALG-G implement four-level switch dimming?
The HV9801ALG-G detects rapid AC power cycling at the VIN pin and uses an internal state machine to toggle between four brightness levels: 100%, 50%, 25%, and 12.5%. Each on/off cycle within one second advances the level bidirectionally. Power removal for >1 s resets to 100%. No external components or communication interface are needed - the function is fully embedded in HV9801ALG-G.
What is the purpose of the RT pin on the HV9801ALG-G?
The RT pin on the HV9801ALG-G programs the constant off-time (TOFF) via an external resistor to GND. Using TOFF = (40 ps/Ω) × RT + 300 ns, designers select RT (30 kΩ–1 MΩ) to set TOFF from 1.5 µs to 40.3 µs. This directly controls minimum switching frequency and ensures stable CCM operation - critical for optimizing efficiency and EMI in buck LED drivers.
Does the HV9801ALG-G require an external microcontroller for dimming functionality?
No, the HV9801ALG-G contains fully autonomous switch-dimming logic. It interprets AC line on/off transitions internally and manages all four brightness states without any external processor, firmware, or additional ICs. The HV9801ALG-G is designed specifically to eliminate microcontroller dependency in cost-sensitive, standards-compliant LED bulb designs.
What protection features are integrated into the HV9801ALG-G?
The HV9801ALG-G integrates output overcurrent/short-circuit protection (hiccup mode triggered at 440 mV CS), IC overtemperature protection (trip at 140°C with 20°C hysteresis), and undervoltage lockout (6.7 V with 500 mV hysteresis). All protections are self-contained - no external comparators, timers, or reset circuitry are required for full fault coverage in the HV9801ALG-G.
HV9801ALG-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)
- Internal Switch(s):
- No
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 15V
- Voltage - Supply (Max):
- 450V
- Voltage - Output:
- 7.5V
- Current - Output / Channel:
- -
- Frequency:
- 1.2kHz
- Dimming:
- PWM
- Applications:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
HV9801ALG-G FAQ
1.How can I place an order for HV9801ALG-G through Aetrix?
Please submit a Request for Quotation (RFQ) for HV9801ALG-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 HV9801ALG-G reliable?
The price and inventory of HV9801ALG-G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HV9801ALG-G is usually 5 days.
3.What payment methods are accepted for HV9801ALG-G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HV9801ALG-G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HV9801ALG-G?
HV9801ALG-G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HV9801ALG-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 HV9801ALG-G?
For technical support, including HV9801ALG-G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HV9801ALG-G requirements.
6.How does Aetrix verify that HV9801ALG-G is sourced from the original manufacturer or authorized distributors?
All HV9801ALG-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 HV9801ALG-G meets industry standards.
7.What is the process for return or replacement of HV9801ALG-G?
All HV9801ALG-G units undergo pre-shipment inspection (PSI). If there is an issue with HV9801ALG-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 HV9801ALG-G part is unused and in its original packaging.
Return procedure for HV9801ALG-G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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