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Microchip Technology HV9961LG-G
- Part No.:
- HV9961LG-G
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
HV9961LG-G.pdf
- Description:
- IC LED DRIVER CTRLR PWM 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:7,088
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Product details
Overview
HV9961LG-G from Microchip Technology is an average-current mode constant-current LED driver IC operating in programmable constant off-time mode, delivering ±3% LED current accuracy, 8V–450V input voltage support, and integrated hiccup-mode short-circuit protection. It serves as a high-accuracy replacement for HV9910B in offline AC/DC LED lighting systems requiring stable current regulation without loop compensation.
For engineers reviewing the HV9961LG-G datasheet, HV9961LG-G pinout, HV9961LG-G application, or HV9961LG-G equivalent, key selection considerations include its fast open-loop average-current control architecture, linear/PWM dual dimming capability, 8-lead SOIC package constraints, and absence of constant-frequency operation - all critical for high-voltage LED driver design validation.
Technical Context
The HV9961LG-G implements proprietary average-current sensing using only low-side switch current detection via the CS pin, eliminating peak-to-average error and enabling accurate regulation across wide input voltage (8–450 V) and load ranges. Its internal 275 mV reference or externally scaled LD input (0–1.5 V) sets current threshold without requiring high-side sensing or compensation networks.
It features a dedicated RT pin to program off-time (32–48 µs with 226 kΩ–1 MΩ resistor), gate driver capable of 165 mA sourcing/sinking, and hiccup-mode protection triggered at 440 mV on CS with 400 µs recovery. Unlike HV9910B, it omits constant-frequency mode and supports only constant off-time control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LED Current Accuracy | ±3% - enables precise luminance control in architectural and street lighting without calibration. |
| Input Voltage Range | 8 V–450 V DC - supports direct connection to rectified AC mains or high-voltage DC bus without pre-regulation. |
| Constant Off-time Range | 32–48 µs - sets switching frequency inversely with inductor value; ensures stable regulation over wide VIN range. |
| VDD Regulation | 7.5 V ±0.25 V - powers internal circuitry and small external bias networks; requires ≥0.1 µF low-ESR bypass capacitor. |
| Short-circuit Threshold | 440 mV on CS pin - triggers hiccup mode (400 µs off-time) to prevent inductor saturation during output fault. |
| Dimming Inputs | PWM (TTL-compatible) + linear (0–1.5 V) - allows flexible brightness control including mixed-mode dimming for extended ratio. |
| Operating Temperature | –40°C to +125°C ambient - qualified for outdoor LED street lighting and industrial signage environments. |
Pinout & Package
Package: 8-lead SOIC (narrow, 3.90 mm body), RoHS-compliant, Pb-free (G suffix). Thermal resistance θJA = 101°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VIN | High-voltage input supply | Accepts 8–450 V DC; powers internal linear regulator generating VDD - limits continuous voltage by package thermal dissipation. |
| 2 CS | Current sense input | Detects MOSFET source current via external sense resistor; 275 mV reference or LD-scaled threshold determines LED current. |
| 3 GND | Power ground reference | Common return for internal circuits and power train; must be low-impedance connection to minimize noise coupling into CS path. |
| 4 GATE | External MOSFET gate driver output | 165 mA sink/source capability; rise/fall times ≤50 ns with 500 pF load - suitable for FETs with QG < 25 nC at ≤100 kHz. |
| 5 PWMD | PWM dimming control input | TTL-compatible enable/disable signal; pulled low disables gate output - used for flicker-free digital brightness control. |
| 6 VDD | Internal regulator output / IC supply | 7.5 V regulated output; must be bypassed with ≥0.1 µF low-ESR capacitor to GND - also accepts external 7.5–12 V supply. |
| 7 LD | Linear dimming input | 0–1.5 V analog control; overrides internal 275 mV reference with VLD × 0.185; gate disabled below 150 mV, re-enabled above 200 mV. |
| 8 RT | Off-time programming terminal | Resistor to GND sets TOFF (32–48 µs); no connection to GATE - differs from HV9910B and prevents incorrect wiring. |
Key Features
| Feature | Design Value |
|---|---|
| Average-current mode control | Eliminates peak-to-average error and enables ±3% LED current accuracy without loop compensation or high-side sensing. |
| Programmable constant off-time | TOFF set by single RT-to-GND resistor (32–48 µs range); ensures stable regulation across 8–450 V input without frequency drift. |
| Dual dimming interface | Independent TTL PWM and 0–1.5 V linear inputs allow hybrid dimming schemes and seamless integration with microcontroller or DAC-based controls. |
| Hiccup-mode short-circuit protection | Triggers at 440 mV on CS with 400 µs forced off-time - prevents inductor saturation and thermal runaway during LED string open/short faults. |
| Wide temperature operation | Specified from –40°C to +125°C ambient - supports deployment in uncontrolled outdoor enclosures and high-ambient industrial settings. |
Applications
| Architectural LED Lighting | LED Street Lighting |
|---|---|
Use Scenario: Constant-current driver for multi-string RGBW façade lighting with 230 VAC input and 0–10 V dimming interface. IC Role / Device Role / Timing Role: Average-current controller regulating LED string current independent of input ripple and temperature drift. Use Value: ±3% current accuracy maintains consistent color point and lumen output across 15-year outdoor service life. |
Use Scenario: High-reliability driver powering 48 V, 1.2 A LED modules in IP67-rated streetlight fixtures powered from 347 VAC line. IC Role / Device Role / Timing Role: Primary constant-current regulator with hiccup-mode fault response protecting against LED string degradation. Use Value: 8–450 V input range eliminates need for auxiliary buck pre-regulator, reducing BOM count and system footprint. |
| Commercial LCD Backlighting | LED Signage & Displays |
Use Scenario: Edge-lit LCD backlight for retail kiosks using 24 VDC input and PWM dimming synchronized to display refresh rate. IC Role / Device Role / Timing Role: Fast open-loop current controller enabling sub-millisecond PWM dimming response without current overshoot. Use Value: Matches HV9910B's PWM timing behavior while improving line/load regulation - simplifies drop-in upgrade of legacy designs. |
Use Scenario: Modular sign driver board supporting 12–36 V LED strings with analog 0–1.5 V brightness control from building management system. IC Role / Device Role / Timing Role: Linear dimming interface converter scaling external 0–1.5 V signal to precise CS threshold voltage (VLD × 0.185). Use Value: Enables smooth 100:1+ dimming ratio using standard 0–10 V infrastructure without additional op-amp circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HV9910BLG-G | Lacks average-current control; uses peak-current mode with ±8% LED current accuracy and requires loop compensation. | Suitable for cost-sensitive, lower-accuracy applications where input voltage variation is minimal. | Choose HV9910BLG-G only if ±3% accuracy and hiccup protection are not required - not a drop-in replacement due to different control architecture. |
| AL8862SP-13 | Fixed-frequency buck controller (500 kHz) with ±5% current accuracy; requires external compensation and high-side current sensing. | Better suited for compact, high-frequency designs with tight EMI constraints but higher component count. | Select AL8862SP-13 when fixed switching frequency and smaller inductors are prioritized over thermal efficiency and simplicity. |
Compared with HV9910BLG-G and AL8862SP-13, the HV9961LG-G delivers superior current accuracy and simplified layout through average-current sensing and no-compensation design - making it optimal for high-reliability, wide-input-voltage LED lighting where regulation stability outweighs frequency control flexibility.
Availability
HV9961LG-G is available at Aetrix Electronics and suitable for LED street lighting, architectural façade illumination, and commercial LCD backlighting requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for HV9961LG-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 a focus on reliability and long-term product support.
The HV9961LG-G belongs to Microchip's high-voltage LED driver product line, designed specifically for accurate, robust constant-current regulation in offline AC/DC LED lighting applications without external compensation.
FAQ
What is the maximum continuous input voltage supported by HV9961LG-G?
The HV9961LG-G has an absolute maximum VIN rating of +470 V, but continuous operation is thermally limited. With the 8-lead SOIC package (θJA = 101°C/W) at 25°C ambient, maximum continuous VIN is ~170 V when drawing 2.5 mA. For 450 V DC operation, external power-dissipation mitigation (e.g., Zener clamp) is required. The HV9961LG-G datasheet specifies 8–450 V DC as the functional input range under appropriate thermal design.
Does HV9961LG-G support constant-frequency operation like HV9910B?
No, the HV9961LG-G does not support constant-frequency mode. It operates exclusively in constant off-time mode, where switching frequency varies inversely with input voltage and inductor value. This architecture improves line and load regulation without requiring loop compensation - a deliberate departure from HV9910B's dual-mode capability.
How does the LD pin function in HV9961LG-G for linear dimming?
In the HV9961LG-G, the LD pin accepts 0–1.5 V to scale the current sense threshold as VCS = VLD × 0.185. Below 150 mV, the gate output is disabled; recovery occurs at 200 mV. This enables analog dimming and mixed-mode (PWM + analog) schemes. When VLD ≥ 1.5 V, the internal 275 mV reference takes precedence - ensuring predictable behavior across full control range.
Is HV9961LG-G pin-compatible with HV9910B despite functional differences?
Yes, the HV9961LG-G is physically pin-compatible with HV9910B in the 8-lead SOIC package (LG variant), sharing identical pin numbering and placement. However, RT pin functionality differs: HV9961LG-G requires RT-to-GND connection, while HV9910B uses RT-to-GATE. Direct replacement requires PCB layout verification to ensure correct RT routing - the HV9961LG-G is not a drop-in electrical substitute without modification.
What thermal derating applies to HV9961LG-G in 8-lead SOIC at elevated ambient temperatures?
The HV9961LG-G in 8-lead SOIC has θJA = 101°C/W. At 125°C ambient, junction temperature reaches limit (150°C) with only ~250 mW dissipation - significantly less than the 650 mW rated at 25°C. Designers must reduce input voltage or add heatsinking to maintain safe operation. Equation 3-5 in the HV9961LG-G datasheet provides exact VIN derating based on TA, RθJA, and IIN.
HV9961LG-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:
- 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:
- 8-SOIC
HV9961LG-G FAQ
1.How can I place an order for HV9961LG-G through Aetrix?
Please submit a Request for Quotation (RFQ) for HV9961LG-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 HV9961LG-G reliable?
The price and inventory of HV9961LG-G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HV9961LG-G is usually 5 days.
3.What payment methods are accepted for HV9961LG-G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HV9961LG-G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HV9961LG-G?
HV9961LG-G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HV9961LG-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 HV9961LG-G?
For technical support, including HV9961LG-G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HV9961LG-G requirements.
6.How does Aetrix verify that HV9961LG-G is sourced from the original manufacturer or authorized distributors?
All HV9961LG-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 HV9961LG-G meets industry standards.
7.What is the process for return or replacement of HV9961LG-G?
All HV9961LG-G units undergo pre-shipment inspection (PSI). If there is an issue with HV9961LG-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 HV9961LG-G part is unused and in its original packaging.
Return procedure for HV9961LG-G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HV9961LG-G 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
Infineon Technologies
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BCR421UE6327HTSA1
Infineon Technologies
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LYT1604D-TL
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HV9910CLG-G
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CL2N8-G
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BCR420UW6-7
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BCR421UW6-7
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BCR420UFD-7
Diodes Incorporated
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BCR421UFD-7
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