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Microchip Technology HV9985QP-G
- Part No.:
- HV9985QP-G
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 44-BSOP (0.295", 7.50mm Width)
- Datasheet:
-
HV9985QP-G.pdf
- Description:
- IC LED DRIVER CTRLR PWM 44QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,462
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Product details
Overview
HV9985QP-G from Microchip Technology is a 3-channel peak current-mode PWM LED driver IC designed for constant-current control of RGB or multi-string white LED loads in boost, buck, and SEPIC topologies. It delivers ±2% absolute current accuracy (with ±1% sense resistors), supports up to 1 MHz switching frequency, and integrates gate drivers with 0.25A sourcing / 0.5A sinking capability - enabling direct drive of logic-level N-channel MOSFETs in high-efficiency backlight systems.
For engineers reviewing the HV9985QP-G datasheet, HV9985QP-G pinout, HV9985QP-G application, or HV9985QP-G equivalent, key selection considerations include its 120° phase-shifted three-channel operation, programmable slope compensation, hiccup-mode fault recovery, and dual dimming support (linear + 5000:1 PWM) - all within a thermally enhanced 40-lead QFN package.
Technical Context
The HV9985QP-G implements independent peak current-mode control per channel with tri-state 1 MHz transconductance op-amps (OTA1–3), 8:1 COMP-pin voltage division, and built-in 100 ns leading-edge blanking on each CS input. Its internal 40V-input/5V-output linear regulator powers all circuitry, while EN pin enables TTL-compatible shutdown with <200 µA standby current.
Three-phase interleaving reduces input ripple; channels operate at identical switching frequency (programmable via RT resistor or external CLK at 1/12th division ratio) and are synchronized 120° apart. Fault protection includes output LED short-circuit detection (via FDBK overvoltage), open-LED hiccup mode, and OVP trip at 1.25 V with 125 mV hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 10 V to 40 V DC - supports wide-range industrial and automotive LED power supplies without external pre-regulation. |
| Output Current Accuracy | ±2% typical absolute - ensures consistent brightness across RGB channels or white LED strings using ±1% sense resistors. |
| Switching Frequency | Up to 1 MHz - enables compact magnetics and low EMI in space-constrained backlight modules. |
| PWM Dimming Ratio | Up to 5000:1 - achieves deep black levels in high-contrast LCD/LED displays without color shift. |
| Gate Drive Capability | 0.25 A sourcing / 0.5 A sinking - directly drives logic-level N-MOSFETs with fast rise/fall times (≤85 ns / ≤45 ns into 2 nF). |
| Operating Temperature | –40°C to +85°C ambient - qualified for industrial and automotive cabin display environments. |
| OVP Threshold | 1.25 V rising with 125 mV hysteresis - protects LEDs from overvoltage during transient load changes or open-circuit events. |
Pinout & Package
Package: 40-lead QFN (7 mm × 7 mm, 0.5 mm pitch), exposed thermal pad (EP) connected to GND for optimal thermal performance (θJA = 24°C/W on 4-layer PCB).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 8) | Linear regulator input | Accepts 10–40 V DC; powers internal 5 V regulator - eliminates need for external bias supply. |
| VDD (Pin 9) | Regulated supply output | 5 V ±2.5% output powering all internal circuitry; must be bypassed with ≥0.1 µF low-ESR capacitor. |
| GATE1–3 (Pins 40, 35, 31) | Power FET gate drivers | Drive external N-channel MOSFETs in boost/buck/SEPIC converters; support 120° interleaved timing. |
| CS1–3 (Pins 3, 37, 28) | Current sense inputs | Monitor source current of power FETs with 100–250 ns blanking; enable slope compensation via RC network. |
| FDBK1–3 (Pins 5, 38, 26) | Current feedback inputs | Receive voltage from LED string sense resistors; feed transconductance amplifiers for closed-loop current regulation. |
| REF1–3 (Pins 6, 13, 25) | Current reference inputs | Set full-scale LED current per channel (0–1.25 V range); support independent linear dimming. |
| PWMD1–3 (Pins 17, 18, 19) | PWM dimming control | TTL-compatible inputs enabling independent 5000:1 PWM dimming per channel with disconnect-FET coordination. |
| FLT1–3 (Pins 2, 36, 29) | Disconnect FET drivers | Control external logic-level switches to isolate LED strings during PWM off-time or short-circuit faults. |
| SKIP (Pin 15) | Hiccup timer programming | Connect external capacitor to set fault recovery time; 5 µA current source charges to 1.6 V for restart. |
| CLK (Pin 23) | External clock input | Accepts TTL square wave; divides frequency by 12 to synchronize all three channels across multiple HV9985QP-G ICs. |
Key Features
| Feature | Design Value |
|---|---|
| Three-phase interleaved operation | Reduces input capacitor RMS current and EMI by distributing switching events 120° apart across channels. |
| Integrated 5 V linear regulator | Eliminates external LDO requirement; supports direct 10–40 V input while maintaining stable core supply. |
| Programmable slope compensation | Enables stable peak current-mode control in continuous conduction mode (CCM) boost/buck converters above 50% duty cycle. |
| Dual dimming architecture | Combines analog REF-based linear dimming (for fine adjustment) with PWM dimming (for true zero-current black level). |
| Hiccup-mode fault recovery | Prevents latch-up during intermittent open/short LED faults; allows automatic restart after programmable timeout. |
| Output short-circuit protection with disconnect FETs | FLT outputs actively disable LED strings during overcurrent, preventing damage and enabling rapid PWM response. |
Applications
| RGB LCD Backlight | Multi-String Automotive Interior Lighting |
|---|---|
Use Scenario: Driving separate red, green, and blue LED strings behind an LCD panel to enable dynamic color gamut tuning and local dimming. IC Role / Device Role / Timing Role: 3-channel constant-current controller with independent PWM dimming per channel and 120° phase interleaving to minimize input ripple. Use Value: Enables precise color point control and >5000:1 contrast ratio without cross-channel interference or audible noise from input capacitors. |
Use Scenario: Powering multiple white LED strings in vehicle cabin lighting (e.g., footwell, map lights, ambient strips) requiring independent brightness control and robust fault handling. IC Role / Device Role / Timing Role: Triple-channel LED driver with hiccup-mode protection and 10–40 V input range compatible with automotive battery fluctuations. Use Value: Ensures uninterrupted operation during cold cranking (down to 6 V) and recovers automatically from momentary LED shorts caused by vibration or moisture ingress. |
| High-Brightness Industrial Display Backlight | SEPIC-Based UV LED Driver |
Use Scenario: Driving high-current white LED arrays in outdoor kiosks or medical displays where thermal stability and long-term current accuracy are critical. IC Role / Device Role / Timing Role: Peak current-mode controller with ±2% current accuracy and integrated thermal-aware design (TJ max = +125°C). Use Value: Maintains consistent luminance over temperature and lifetime without recalibration, reducing field failure rates in sealed enclosures. |
Use Scenario: Driving UV-A LEDs (365 nm) in industrial curing systems requiring stable current despite wide forward voltage variation (3–8 V per string). IC Role / Device Role / Timing Role: SEPIC topology controller supporting non-inverting buck-boost operation with programmable slope compensation for stability. Use Value: Delivers regulated current across varying LED VF and input voltage (e.g., 12–36 V DC), eliminating need for multiple fixed-ratio supplies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-channel LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ3367-AEC1 from Monolithic Power Systems | Automotive-grade AEC-Q100 qualified; integrates high-side current sense; no external slope compensation required. | Targeted for automotive headlamp modules; lacks independent REF/PWMD per channel - uses single global dimming control. | Select when AEC-Q100 compliance and simplified layout (no CS resistor) are mandatory, and per-channel dimming is not required. |
| IS31FL3733-QFLS4 from ISSI | 18-channel I²C-controlled linear LED driver; no switching topology; max 30 mA/channel; no OVP or hiccup protection. | Designed for low-power indicator lighting and status panels; incompatible with high-current boost/buck LED strings. | Select only for low-voltage, low-current RGB indicator applications - not a functional substitute for HV9985QP-G's switching architecture. |
Compared with MPQ3367-AEC1, HV9985QP-G offers independent per-channel dimming and external topology flexibility but requires more external components; versus IS31FL3733-QFLS4, it delivers 10× higher current capability and robust fault protection essential for high-brightness lighting.
Availability
HV9985QP-G is available at Aetrix Electronics and suitable for RGB backlight systems, automotive interior lighting modules, and industrial display power supplies requiring stable component supply, long-lifecycle availability, and traceable sourcing.
Supply support for HV9985QP-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 a focus on reliability, longevity, and industrial-grade qualification.
The HV9985QP-G belongs to Microchip's high-performance LED driver product line, engineered specifically for multi-channel constant-current backlighting and general-purpose LED lighting applications demanding precision, efficiency, and fault resilience.
FAQ
What is the maximum switching frequency supported by the HV9985QP-G?
The HV9985QP-G supports a maximum switching frequency of 1 MHz when configured with the internal oscillator and appropriate RT resistor value. This high-frequency capability enables compact magnetic design and reduced output ripple in LED driver applications. The HV9985QP-G maintains stable peak current-mode control up to this limit, provided slope compensation is correctly implemented for continuous conduction mode operation.
Does the HV9985QP-G require external slope compensation in all applications?
No - slope compensation is only required for continuous conduction mode (CCM) operation at duty cycles above 50%. In discontinuous conduction mode (DCM), the HV9985QP-G remains stable without external compensation. When needed, slope compensation is programmed via an RC network on each CS pin, with internal 100 Ω discharge resistance (RDIS) and adjustable ramp amplitude based on VDD and RSC.
How does the HV9985QP-G achieve 5000:1 PWM dimming ratio?
The HV9985QP-G achieves 5000:1 PWM dimming through coordinated action of its PWMD inputs and FLT outputs: during PWM low time, the transconductance amplifier output disconnects from the COMP pin (preserving integrator voltage), GATE drivers disable, and FLT pins turn off external disconnect FETs - isolating the LED string from the output capacitor. This prevents capacitor discharge and enables rapid, clean current transitions. The HV9985QP-G's fast gate drive (≤45 ns fall time) and dedicated blanking circuitry further enhance timing fidelity.
Can the HV9985QP-G operate without using its internal 5 V linear regulator?
Yes - the HV9985QP-G can be powered directly via the VDD1–VDD3 pins using an external 5 V ±10% supply, bypassing the internal linear regulator. In this configuration, VIN may be left unconnected or tied to VDD. All four VDD pins (VDD, VDD1–VDD3) must still be connected externally and bypassed with ≥0.1 µF low-ESR capacitors to their respective ground returns to ensure noise immunity and gate drive stability.
What protection features does the HV9985QP-G provide against LED string faults?
The HV9985QP-G provides comprehensive LED string protection including output overvoltage protection (OVP1–OVP3, 1.25 V trip), open-LED hiccup-mode recovery (programmed via SKIP pin capacitor), and output short-circuit protection with active FLT-driven disconnect FETs. During short-circuit events, the HV9985QP-G pulls GATE and FLT low, isolates the LED string, initiates hiccup timing, and attempts automatic restart - enabling recovery from transient faults without system reset or manual intervention.
HV9985QP-G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 44-BSOP (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- DC DC Controller
- Topology:
- SEPIC, Step-Down (Buck), Step-Up (Boost)
- Internal Switch(s):
- No
- Number of Outputs:
- 3
- Voltage - Supply (Min):
- 10V
- Voltage - Supply (Max):
- 40V
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- 125kHz, 500kHz
- Dimming:
- Analog, PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-QSOP
HV9985QP-G FAQ
1.How can I place an order for HV9985QP-G through Aetrix?
Please submit a Request for Quotation (RFQ) for HV9985QP-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 HV9985QP-G reliable?
The price and inventory of HV9985QP-G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HV9985QP-G is usually 5 days.
3.What payment methods are accepted for HV9985QP-G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HV9985QP-G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HV9985QP-G?
HV9985QP-G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HV9985QP-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 HV9985QP-G?
For technical support, including HV9985QP-G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HV9985QP-G requirements.
6.How does Aetrix verify that HV9985QP-G is sourced from the original manufacturer or authorized distributors?
All HV9985QP-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 HV9985QP-G meets industry standards.
7.What is the process for return or replacement of HV9985QP-G?
All HV9985QP-G units undergo pre-shipment inspection (PSI). If there is an issue with HV9985QP-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 HV9985QP-G part is unused and in its original packaging.
Return procedure for HV9985QP-G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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