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Microchip Technology HV9961NG-G-M934
- Part No.:
- HV9961NG-G-M934
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
HV9961NG-G-M934.pdf
- Description:
- IC LED DRIVER CTRLR PWM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,753
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Product details
Overview
HV9961NG-G-M934 from Microchip Technology is an average-current mode constant-current LED driver IC operating in constant off-time mode, designed for high-voltage DC/DC and AC/DC LED applications. It delivers ±3% LED current accuracy, supports 8V–450V input voltage range, features linear and PWM dimming inputs, and provides hiccup-mode short-circuit protection with 400 µs recovery time.
For engineers reviewing the HV9961NG-G-M934 datasheet, HV9961NG-G-M934 pinout, HV9961NG-G-M934 application, or HV9961NG-G-M934 equivalent, this page provides verified technical context, package-specific pin mapping, real-world dimming behavior, thermal limits for 16-lead SOIC, and validated alternative options for LED driver design continuity.
Technical Context
The HV9961NG-G-M934 implements proprietary average-current sensing using only low-side switch current detection-eliminating peak-to-average error without requiring loop compensation or high-side sensing. Its open-loop control achieves fast transient response and eliminates dependency on inductance value, switching frequency, or output voltage variation.
It uses a resistor-programmable off-time timer (RT pin) with TOFF = RT/25 + 0.3 µs (30 kΩ ≤ RT ≤ 1 MΩ), supports dual dimming modes (0–1.5 V linear via LD pin, TTL-compatible PWM via PWMD), and integrates an internal 7.5 V regulator (7.25–7.75 V) powered directly from VIN or externally applied to VDD.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 8 V–450 V DC - enables direct offline AC/DC operation without pre-regulator; continuous use limited by package thermal dissipation (≤170 V at 25°C for 8-pin, higher with 16-pin SOIC). |
| LED Current Accuracy | ±3% - achieved via stable 275 mV current sense reference (264–286 mV) and temperature-compensated LD-to-CS ratio (0.178–0.188), enabling precise brightness control in lighting systems. |
| Dimming Support | Linear (0–1.5 V at LD) and PWM (TTL-compatible at PWMD) - allows mixed-mode dimming with >1000:1 effective ratio; gate recovers at 200 mV LD, disables below 150 mV. |
| Off-time Programmability | 32–48 µs (RT = 1 MΩ) or 8–12 µs (RT = 226 kΩ) - sets switching frequency inversely; no constant-frequency mode supported, unlike HV9910B. |
| Short-circuit Protection | Hiccup mode triggered at 410–470 mV at CS pin, with 400 µs typical hiccup time - prevents inductor saturation and thermal runaway during LED string open/short faults. |
| Operating Temperature | –40°C to +125°C ambient - qualified for industrial and outdoor LED lighting environments; junction limit is +150°C. |
| Package Thermal Resistance | θJA = 83°C/W (16-lead SOIC) - enables higher continuous input voltage operation vs. 8-lead version (θJA = 101°C/W), critical for 400 V-class designs. |
Pinout & Package
HV9961NG-G-M934 is supplied in a 16-lead SOIC package (Microchip drawing C04-057-SN), 3.90 mm body width, RoHS-compliant matte tin finish. Pin 1 is marked by a dot or delta-up symbol; device marking reads "HV9961NG" followed by date code and traceability code.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | High-voltage input (8–450 V) to internal linear regulator; powers VDD and supplies gate driver bias; must withstand 470 V absolute max. |
| 4 | CS | Current sense input; compares voltage across external RCS to 275 mV reference or scaled LD voltage; includes 150–340 ns blanking to reject switching noise. |
| 5 | GND | Power ground return for all internal circuitry; must be connected to power train ground plane with low-inductance path to minimize noise coupling. |
| 8 | GATE | Push-pull gate driver output (0.165 A sink/source); drives external N-channel MOSFET; rise/fall times ≤50 ns into 500 pF load. |
| 9 | PWMD | PWM dimming control input; TTL-compatible (0.8 V low / 2.2 V high); pulls gate low when grounded; internal 100 kΩ pull-down. |
| 12 | VDD | Internally regulated 7.5 V supply (7.25–7.75 V); powers internal logic and gate driver; requires ≥0.1 µF low-ESR bypass capacitor to GND. |
| 13 | LD | Linear dimming input; overrides internal 275 mV reference when 0.2–1.5 V applied; sets ILED = VLD × 0.185 / RCS; disables gate below 150 mV. |
| 14 | RT | Off-time timing input; connects to GND via resistor (30 kΩ–1 MΩ); determines TOFF per TOFF = RT/25 + 0.3 µs; not compatible with HV9910B wiring. |
Key Features
| Feature | Design Value |
|---|---|
| Average-current mode control | Eliminates peak-to-average error inherent in peak-current controllers like HV9910B-enabling ±3% LED current accuracy without loop compensation or high-side sensing. |
| Programmable constant off-time | TOFF set by single RT-to-GND resistor (30 kΩ–1 MΩ); enables stable operation across wide input/output voltage ranges without frequency drift or instability. |
| Dual dimming interface | Independent linear (LD) and PWM (PWMD) inputs allow flexible brightness control schemes-including mixed-mode dimming for extended dynamic range beyond 1000:1. |
| Hiccup-mode short-circuit protection | Triggers at 440 mV (typ.) on CS pin, enforces 400 µs off-time to limit average power during fault-prevents thermal runaway while maintaining system visibility. |
| Wide input voltage capability | Operates directly from 8–450 V DC input; internal regulator maintains stable 7.5 V VDD; 16-lead SOIC's lower θJA (83°C/W) supports higher continuous voltage vs. 8-lead variant. |
Applications
| Architectural LED Lighting | LED Street Lighting |
|---|---|
|
Use Scenario: Outdoor luminaires with wide input voltage range (e.g., 120–305 VAC rectified) powering multi-string LED arrays under varying ambient temperatures (–40°C to +85°C). IC Role / Device Role / Timing Role: Constant-current controller regulating total LED string current; manages off-time timing via RT resistor to maintain stable frequency despite line voltage fluctuations. Use Value: ±3% current accuracy ensures consistent lumen output across units and lifetime; hiccup protection prevents catastrophic failure during moisture-induced short circuits. |
Use Scenario: High-reliability roadway lighting using 48 V–400 V DC bus architecture with remote PWM dimming and local analog dimming for adaptive light-level control. IC Role / Device Role / Timing Role: Primary LED current regulator interfacing with external MOSFET; accepts both PWMD (central controller) and LD (local sensor feedback) signals for hybrid dimming. Use Value: Dual-dimming support enables DALI/PWM integration while retaining analog fallback; 125°C ambient rating ensures operation inside sealed, thermally constrained pole-top enclosures. |
| LED Backlight for Industrial LCDs | Commercial LED Signage |
|
Use Scenario: Ruggedized medical or industrial display backlight requiring flicker-free dimming, EMI robustness, and operation from 24–48 VDC industrial power rails. IC Role / Device Role / Timing Role: Average-current buck controller driving multiple parallel LED strings; uses linear dimming (LD) for smooth analog brightness adjustment without PWM artifacts. Use Value: Leading-edge blanking (150–340 ns) rejects gate-drive noise at CS pin-critical for clean current sensing in noisy industrial environments; no compensation required simplifies layout. |
Use Scenario: Large-format indoor signage with variable LED density and thermal profiles, requiring field-adjustable current per segment and overvoltage resilience. IC Role / Device Role / Timing Role: Modular constant-current source per LED zone; RT resistor selects off-time to match inductor size and thermal envelope; VDD can be externally powered for tighter regulation. Use Value: 16-lead SOIC package offers superior thermal performance (θJA = 83°C/W) vs. 8-lead alternatives-enabling higher current density per board area without derating. |
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; no LD pin-linear dimming not natively supported. | Limited dimming flexibility; lower accuracy reduces binning requirements but increases current variance across temperature/voltage. | Select HV9910B only if legacy design reuse or cost sensitivity outweighs need for ±3% accuracy and dual-dimming capability. |
| AL8862T-13 | Constant-current buck controller with integrated 600 V MOSFET; fixed 1 MHz switching; no RT programmability; supports PWM dimming only; no linear dimming input. | Reduced BOM count due to integrated FET; unsuitable for >1 A loads or high-efficiency discrete-FET topologies requiring gate drive optimization. | Choose AL8862T-13 for compact, low-component-count designs up to 700 mA where programmability and dual-dimming are unnecessary. |
Compared with HV9910B, HV9961NG-G-M934 improves LED current accuracy by 2 percentage points and adds linear dimming-enabling smoother analog control without external DACs. Versus AL8862T-13, it trades integrated FET convenience for discrete MOSFET flexibility, higher current scalability, and independent off-time tuning.
Availability
HV9961NG-G-M934 is available at Aetrix Electronics and suitable for architectural LED lighting, street lighting infrastructure, and industrial display backlighting requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.
Supply support for HV9961NG-G-M934 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 emphasis on reliability, longevity, and industrial-grade qualification.
HV9961NG-G-M934 belongs to Microchip's high-voltage LED driver product line, engineered specifically for accurate, robust, and thermally efficient constant-current regulation in offline and high-input-voltage LED lighting systems.
FAQ
What is the maximum continuous input voltage for HV9961NG-G-M934 in 16-lead SOIC package?
The HV9961NG-G-M934 supports up to 450 V DC input per absolute maximum rating, but continuous operation is thermally limited. With its 16-lead SOIC package (θJA = 83°C/W), it can sustain ~250 V DC at 25°C ambient and full load before reaching 125°C junction limit-higher than the 8-lead version's ~170 V limit. External series Zener or resistor may extend usable range.
How does HV9961NG-G-M934 achieve ±3% LED current accuracy without loop compensation?
HV9961NG-G-M934 achieves ±3% LED current accuracy through proprietary average-current sensing that uses only the low-side MOSFET current waveform-eliminating peak-to-average error inherent in peak-current controllers. It relies on a tightly regulated 275 mV internal reference (264–286 mV), temperature-stable LD-to-CS scaling (0.178–0.188), and leading-edge blanking-no external compensation components needed.
Can HV9961NG-G-M934 replace HV9910B in existing designs without PCB changes?
Yes-HV9961NG-G-M934 is pin-to-pin compatible with HV9910B in the same 16-lead SOIC footprint. However, RT must connect to GND (not Gate), and LD replaces NC functionality. No layout changes are required, but firmware or dimming circuitry may need minor updates to leverage LD-based linear dimming and improved accuracy.
What is the purpose of the LD pin on HV9961NG-G-M934, and how does it interact with CS?
The LD pin on HV9961NG-G-M934 serves as a linear dimming input that scales the current sense threshold: when 0.2–1.5 V is applied, ILED = (VLD × 0.185) / RCS. Below 150 mV, gate output disables; above 200 mV, it resumes. This overrides the default 275 mV CS reference, enabling analog brightness control without external DACs or op-amps.
Does HV9961NG-G-M934 support constant-frequency operation like HV9910B?
No-HV9961NG-G-M934 operates exclusively in constant off-time mode and does not support constant-frequency operation. Its switching frequency varies inversely with input/output voltage and inductor value. This trade-off enables superior line/load regulation and eliminates need for frequency compensation, distinguishing it from HV9910B's dual-mode capability.
HV9961NG-G-M934 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-M934 FAQ
1.How can I place an order for HV9961NG-G-M934 through Aetrix?
Please submit a Request for Quotation (RFQ) for HV9961NG-G-M934 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-M934 reliable?
The price and inventory of HV9961NG-G-M934 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-M934 is usually 5 days.
3.What payment methods are accepted for HV9961NG-G-M934?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HV9961NG-G-M934 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HV9961NG-G-M934?
HV9961NG-G-M934 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HV9961NG-G-M934 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-M934?
For technical support, including HV9961NG-G-M934 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HV9961NG-G-M934 requirements.
6.How does Aetrix verify that HV9961NG-G-M934 is sourced from the original manufacturer or authorized distributors?
All HV9961NG-G-M934 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-M934 meets industry standards.
7.What is the process for return or replacement of HV9961NG-G-M934?
All HV9961NG-G-M934 units undergo pre-shipment inspection (PSI). If there is an issue with HV9961NG-G-M934, 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-M934 part is unused and in its original packaging.
Return procedure for HV9961NG-G-M934:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HV9961NG-G-M934 Tags
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BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
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BCR420UE6327HTSA1
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BCR421UE6327HTSA1
Infineon Technologies
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LYT1604D-TL
Power Integrations
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HV9910CLG-G
Microchip Technology
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CL2N8-G
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BCR420UW6-7
Diodes Incorporated
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BCR421UW6-7
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BCR420UFD-7
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BCR421UFD-7
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