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Microchip Technology HV9961NG-G
- Part No.:
- HV9961NG-G
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
HV9961NG-G.pdf
- Description:
- IC LED DRIVER CTRLR PWM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:170
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Product details
Overview
HV9961NG-G from Microchip Technology is a high-voltage average-current mode LED driver IC operating in constant off-time mode, designed for offline AC/DC and high-input DC LED applications. It delivers ±3% LED current accuracy, supports 8V–450V input voltage, integrates linear and PWM dimming inputs, and provides hiccup-mode short-circuit protection. It serves as a precision replacement for HV9910B in architectural lighting and LCD backlighting.
For engineers reviewing the HV9961NG-G datasheet, HV9961NG-G pinout, HV9961NG-G application, or HV9961NG-G equivalent, this page provides verified technical context, validated pin functions, real-world dimming behavior, thermal limits for 16-lead SOIC packaging, and confirmed drop-in compatibility with HV9910B - all grounded in Microchip's DS20005588B specification.
Technical Context
The HV9961NG-G implements proprietary average-current sensing using only low-side switch current detection - eliminating peak-to-average error and removing need for loop compensation or high-side sensing. Its open-loop control achieves fast transient response and maintains LED current regulation independent of inductance, switching frequency, or output voltage variation.
It operates exclusively in constant off-time (COT) mode - unlike HV9910B, it does not support constant-frequency operation. The RT pin programs off-time (32–48 µs typical), while CS senses current via external resistor and LD enables linear dimming via 0–1.5 V analog input with 150 mV shutdown threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 8 V to 450 V DC - powers directly from rectified AC mains or high-voltage DC rails without external regulator |
| LED Current Accuracy | ±3% - achieved via internal 275 mV reference and temperature-stable CS threshold (±5 mV drift) |
| Operating Temperature | –40°C to +125°C ambient - qualified for outdoor street lighting and industrial environments |
| Dimming Interfaces | PWM dimming (TTL-compatible) + linear dimming (0–1.5 V analog) - enables hybrid dimming schemes up to 1000:1 ratio |
| Protection Features | Hiccup-mode short-circuit protection with 400 µs off-time - prevents inductor saturation during output fault |
| Gate Drive Capability | 165 mA sink/source, 30–50 ns rise/fall time - drives MOSFETs with QG < 25 nC at ≤100 kHz |
| Package Thermal Resistance | 83°C/W (θJA, 16-lead SOIC) - supports 1 W continuous dissipation at 25°C ambient |
Pinout & Package
HV9961NG-G is supplied in a 16-lead SOIC package (Microchip drawing C04-057-SN), Pb-free/RoHS-compliant, with 1.27 mm pitch and 3.90 mm × 9.90 mm body. Pin 1 is marked by a dot; pins 2, 3, 6, 7, 10, 11, 15, and 16 are no-connect (NC).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | High-voltage input | Accepts 8–450 V DC; powers internal 7.5 V regulator - enables direct connection to rectified line voltage |
| CS (Pin 4) | Current sense input | Detects MOSFET source current via external resistor; triggers gate turn-off when voltage reaches 275 mV or VLD×0.185 |
| GND (Pin 5) | Power ground | Common return for power train and internal circuitry - must be low-inductance connection to minimize noise coupling |
| GATE (Pin 8) | External MOSFET driver | Push-pull output capable of 165 mA drive - directly controls N-channel power switch without external buffer |
| RT (Pin 9) | Off-time programming | Resistor to GND sets constant off-time (32–48 µs); replaces HV9910B's RT-to-GATE configuration |
| LD (Pin 12) | Linear dimming input | 0–1.5 V analog control; overrides internal 275 mV reference; disables gate below 150 mV |
| VDD (Pin 13) | Internal supply rail | Regulated 7.5 V output (±0.25 V); powers internal logic and can supply external bias circuits up to 1 mA |
| PWMD (Pin 14) | PWM dimming input | TTL-compatible enable/disable signal; low = gate disabled, high = normal operation |
Key Features
| Feature | Design Value |
|---|---|
| Average-current mode control | Eliminates peak-to-average error - ensures ±3% LED current accuracy without compensation network or high-side sensing |
| Programmable constant off-time | RT resistor sets stable switching period (32–48 µs) - improves line/load regulation across 8–450 V input range |
| Dual dimming interface | Simultaneous PWM (TTL) and linear (0–1.5 V) inputs - enables mixed-mode dimming for extended dynamic range |
| Hiccup-mode short-circuit protection | Triggers at 440 mV on CS, enforces 400 µs off-time - prevents thermal runaway during LED string open/short faults |
| Wide ambient temperature range | –40°C to +125°C operation - supports deployment in uncontrolled outdoor enclosures and high-temperature industrial settings |
Applications
| Architectural LED Lighting | LCD Display Backlighting |
|---|---|
Use Scenario: Constant-current driver for multi-string RGBW LED fixtures in building façades and interior accent lighting. IC Role / Device Role / Timing Role: Average-current mode controller regulating LED string current independent of input voltage ripple and temperature drift. Use Value: ±3% current accuracy ensures consistent color point and luminance across wide input (8–450 V) and temperature (–40°C to +125°C) ranges. |
Use Scenario: High-efficiency backlight driver for commercial-grade LCD panels in kiosks and medical displays. IC Role / Device Role / Timing Role: Constant off-time buck controller with fast open-loop dimming response for flicker-free brightness control. Use Value: PWM dimming settles within 3–4 cycles; linear dimming enables smooth 0–100% analog control without audible noise. |
| LED Street Lighting | Industrial Signage |
Use Scenario: Outdoor-rated LED driver powering 40–100 W luminaires on utility poles with wide-line voltage tolerance. IC Role / Device Role / Timing Role: High-voltage input stage (VIN = 8–450 V) combined with hiccup-mode fault protection for long-term reliability. Use Value: Direct connection to rectified 277 VAC mains eliminates pre-regulator losses; 400 µs hiccup cycle prevents thermal stress during prolonged short-circuit events. |
Use Scenario: Modular LED sign driver supporting multiple channel configurations with programmable current per segment. IC Role / Device Role / Timing Role: Dual-dimming interface (PWMD + LD) enabling centralized digital control and local analog override. Use Value: Linear dimming input accepts 0–1.5 V from microcontroller DAC; PWM input accepts 100–2000 Hz signals for strobe or emergency flash modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HV9910B | Peak-current mode control; ±5% LED current accuracy; supports constant-frequency mode; requires loop compensation | Lower accuracy and poorer line regulation; suitable where cost sensitivity outweighs precision requirements | Use HV9910B only if existing design uses its constant-frequency option or if ±5% current tolerance is acceptable |
| AL8862SP-13 | Constant-current buck controller with integrated 600 V MOSFET; 0.5–300 mA output; no linear dimming input | Self-contained solution for low-power signage; lacks HV9961NG-G's 450 V input capability and dual-dimming flexibility | Select AL8862SP-13 for space-constrained, low-current (<300 mA) designs where integrated FET simplifies layout |
Compared with HV9910B, HV9961NG-G improves LED current accuracy by 2 percentage points and removes compensation components; compared with AL8862SP-13, it supports higher input voltage, external MOSFET selection, and both PWM and linear dimming - making it optimal for medium-to-high power, high-precision LED systems.
Availability
HV9961NG-G is available at Aetrix Electronics and suitable for architectural lighting, LCD backlighting, and LED street lighting requiring stable component supply, long-lifecycle assurance, and RoHS-compliant manufacturing.
Supply support for HV9961NG-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 timing solutions, with broad industrial and automotive qualification coverage.
HV9961NG-G belongs to Microchip's high-voltage LED driver product line, engineered specifically for accurate, robust, and compact constant-current regulation in offline AC/DC LED lighting systems - prioritizing accuracy, thermal resilience, and dimming flexibility over integration density.
FAQ
What is the maximum continuous input voltage supported by HV9961NG-G?
HV9961NG-G supports up to 450 V DC input voltage per absolute maximum rating, but continuous operation is thermally limited. With 16-lead SOIC (θJA = 83°C/W) at 25°C ambient, maximum continuous VIN is ~396 V when drawing 2.5 mA - calculated using TJ(MAX) = 125°C. For higher voltages, external Zener clamping is recommended. HV9961NG-G's internal regulator maintains stable 7.5 V VDD across this full range.
How does HV9961NG-G achieve ±3% LED current accuracy without loop compensation?
HV9961NG-G achieves ±3% LED current accuracy through proprietary average-current sensing that uses only low-side switch current detection - eliminating peak-to-average error inherent in peak-current controllers like HV9910B. Its open-loop architecture relies on precise internal 275 mV reference (±11 mV over temperature) and stable LD-to-CS scaling (0.185×VLD), removing need for external compensation components. HV9961NG-G's accuracy is verified across –40°C to +125°C ambient.
Can HV9961NG-G replace HV9910B in an existing design without PCB changes?
Yes - HV9961NG-G is pin-to-pin compatible with HV9910B in the 16-lead SOIC package and functions as a drop-in replacement. Key differences include removal of RT-to-GATE connection (RT now connects only to GND), elimination of compensation network, and improved accuracy. HV9961NG-G retains identical pinout, dimming interfaces, and protection thresholds - allowing direct substitution to upgrade performance without layout revision.
What is the minimum inductor current required to maintain regulation in HV9961NG-G?
HV9961NG-G requires continuous conduction mode (CCM) for accurate regulation. Inductor peak-to-peak ripple should be 30–40% of average DC load current. Regulation fails if duty cycle exceeds 75% (DMAX), or if output voltage VO drops below VO(MIN) = VIN × DMIN where DMIN = 1 µs/(TOFF + 1 µs). HV9961NG-G's TOFF is set by RT (e.g., 40 µs typical), so VO(MIN) ≈ VIN × 0.025 - meaning regulation holds down to ~1% of VIN, provided inductor value satisfies CCM condition.
Does HV9961NG-G support both PWM and linear dimming simultaneously?
Yes - HV9961NG-G supports concurrent PWM and linear dimming. PWMD enables digital on/off or pulse-width control, while LD accepts 0–1.5 V analog input to scale LED current proportionally. When both are active, LD sets baseline current level and PWMD modulates around it - enabling "mixed-mode" dimming for extended dynamic range (e.g., 0.1%–100%). HV9961NG-G's fast open-loop response ensures PWM edges settle within 3–4 switching cycles regardless of frequency.
HV9961NG-G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- DC DC Controller
- Topology:
- Step-Down (Buck)
- Internal Switch(s):
- No
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 8V
- Voltage - Supply (Max):
- 450V
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- -
- Dimming:
- Analog, PWM
- Applications:
- Backlight, Lighting, Signage
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
HV9961NG-G FAQ
1.How can I place an order for HV9961NG-G through Aetrix?
Please submit a Request for Quotation (RFQ) for HV9961NG-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 HV9961NG-G reliable?
The price and inventory of HV9961NG-G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HV9961NG-G is usually 5 days.
3.What payment methods are accepted for HV9961NG-G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HV9961NG-G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HV9961NG-G?
HV9961NG-G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HV9961NG-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 HV9961NG-G?
For technical support, including HV9961NG-G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HV9961NG-G requirements.
6.How does Aetrix verify that HV9961NG-G is sourced from the original manufacturer or authorized distributors?
All HV9961NG-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 HV9961NG-G meets industry standards.
7.What is the process for return or replacement of HV9961NG-G?
All HV9961NG-G units undergo pre-shipment inspection (PSI). If there is an issue with HV9961NG-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 HV9961NG-G part is unused and in its original packaging.
Return procedure for HV9961NG-G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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