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Texas Instruments LP8865XQDMTRQ1
- Part No.:
- LP8865XQDMTRQ1
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 14-VDFN Exposed Pad
- Datasheet:
-
LP8865XQDMTRQ1.pdf
- Description:
- LED DRIVER
- Quantity:
- Payment:
- Shipping:
Inventory:2,563
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Product details
Overview
LP8865XQDMTRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive LED driver IC supporting boost topology, integrated 2.6A/150mΩ low-side MOSFET, 4.5V–65V input range, 100kHz–2.2MHz configurable switching frequency with spread spectrum, and inductive fast dimming (IFD) for high-accuracy LED brightness control in instrument clusters and HUDs.
For engineers reviewing the LP8865XQDMTRQ1 datasheet, LP8865XQDMTRQ1 pinout, LP8865XQDMTRQ1 application, or LP8865XQDMTRQ1 equivalent, this page delivers verified topology-specific parameters, validated VSON-14 pin functions, confirmed thermal foldback and fault signaling behavior, and real-world dimming performance data for automotive lighting system design.
Technical Context
The LP8865XQDMTRQ1 implements adaptive off-time current-mode control with smart sampling to enable inductive fast dimming (IFD), achieving 150ns minimum PWM pulse width and 256:1 analog dimming ratio. Its FSET pin sets switching frequency from 100kHz to 2.2MHz via external resistor, while spread spectrum (±7%, 2kHz modulation) reduces EMI peaks.
It integrates a 2.6A/150mΩ low-side NMOS switch and supports constant-current LED regulation via CSP/CSN sense inputs with 200mV reference threshold. Fault detection includes LED open/short, cycle-by-cycle current limit, thermal shutdown at 165°C, and configurable thermal foldback starting at 130°C with RTEMP-based curve tuning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Boost only - fixed internal configuration per LP8865X-Q1 variant; not reconfigurable to buck or buck-boost. |
| Input Voltage Range | 4.5V to 63V - supports full automotive battery range including cold-crank and load-dump transients. |
| Switching Frequency | 100kHz to 2.2MHz - set by external resistor on FSET pin; spread spectrum enabled for EMI reduction. |
| Integrated MOSFET | 2.6A current limit, 150mΩ RDS(on) - enables high-efficiency, compact boost LED drivers without external power switch. |
| Dimming Capability | 150ns minimum PWM pulse width + 256:1 analog dimming ratio - enables precise, flicker-free brightness control in HUDs and clusters. |
| Thermal Protection | Configurable thermal foldback (RTEMP-based) + 165°C shutdown with 15°C hysteresis - ensures safe operation under sustained high-power conditions. |
| AEC-Q100 Grade | Grade 1 (–40°C to +125°C TA) - qualified for under-hood and dashboard mounting locations in passenger vehicles. |
Pinout & Package
VSON-14 package (4.5mm × 3mm, wettable flank), thermally enhanced with exposed power ground pad. Pin functions are topology-specific; LP8865XQDMTRQ1 uses boost/buck-boost pin mapping (OVP pin active, UVP unused).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, PGND | Power ground | Low-impedance return path for high-current switching node; must be connected to thermal pad. |
| 2, AGND | Analog ground | Reference for error amplifier and sensing circuitry; separate from PGND to minimize noise coupling. |
| 3, VIN | Main input supply | Accepts 4.5V–63V automotive input; feeds internal LDO and power stage. |
| 4, VCC | LDO output | 5.15V regulated supply for internal logic; requires 1μF capacitor to GND for stability. |
| 5, ADIM/HD | Dimming mode select | Pull high for PWM-only, pull low for hybrid dimming, or apply PWM signal for analog dimming. |
| 6, EN/PWM | Enable/dimming input | High = always-on, low = disable, PWM input = PWM dimming; 150ns min pulse width supported. |
| 7, FAULT | Open-drain fault indicator | Pulls low on LED open/short, overtemperature, or current-limit fault; requires external pull-up. |
| 8, TEMP | Thermal foldback control | Resistor-to-GND sets foldback curve onset (e.g., 20kΩ → 130°C start) and slope. |
| 9, FSET | Frequency setting | Resistor-to-GND selects switching frequency (e.g., 59kΩ = 400kHz); spread spectrum enabled. |
| 10, COMP | Error amplifier output | Connect RC network to GND to tune loop bandwidth, soft-start time, and stability. |
| 11, OVP | Overvoltage protection | Resistor divider sets LED open detection threshold; active in boost/buck-boost topologies. |
| 12, CSN | Current sense negative | Low-side current sense input; 100Ω series resistor recommended for noise immunity. |
| 13, CSP | Current sense positive | High-side current sense input; used with CSN to measure LED current via external Rsense. |
| 14, SW | Switching node | Internally connected to low-side MOSFET drain; connects to inductor and Schottky diode anode. |
Key Features
| Feature | Design Value |
|---|---|
| Inductive Fast Dimming (IFD) | Enables 150ns PWM pulses and accurate low-duty-cycle current regulation via adaptive off-time sampling - critical for high-contrast HUDs. |
| Spread Spectrum EMI Reduction | ±7% frequency dithering at 2kHz modulation lowers peak EMI emissions, easing compliance with CISPR 25 Class 5. |
| Configurable Thermal Foldback | RTEMP-based curve allows progressive LED current reduction before shutdown - maintains display visibility during thermal stress. |
| Integrated 2.6A/150mΩ MOSFET | Eliminates external high-current switch, reducing BOM count and PCB area in space-constrained automotive modules. |
| Four Dimming Modes | Hardware-selectable analog, PWM, hybrid, and flexible dimming via ADIM/HD and EN/PWM pin states - simplifies firmware control. |
| LED Open/Short Detection | OVP-based open-circuit detection and CSP/CSN monitoring for short-circuit faults - enables fail-safe lighting system diagnostics. |
Applications
| Automotive Instrument Clusters | Heads-Up Displays (HUD) |
|---|---|
Use Scenario: Driving digital gauges and warning icons under variable ambient light (day/night, tunnel entry). IC Role / Device Role / Timing Role: Boost LED driver delivering stable 2A current to multi-segment RGB LED arrays with synchronized dimming. Use Value: 256:1 analog dimming ratio and 150ns PWM resolution ensure smooth, flicker-free transitions between brightness levels without visible stepping. |
Use Scenario: Projecting critical speed and navigation data onto windshield with high contrast and minimal latency. IC Role / Device Role / Timing Role: High-efficiency boost driver powering green phosphor LEDs at 0.5A–2A with IFD-enabled rapid brightness adaptation. Use Value: Adaptive off-time control and spread spectrum reduce EMI interference with RF receivers while maintaining <1µs dimming response. |
| Automotive Infotainment Displays | Automotive Exterior Lighting Control |
Use Scenario: Backlighting TFT LCD center consoles with dynamic local dimming zones. IC Role / Device Role / Timing Role: Constant-current boost driver managing multiple parallel LED strings via external current mirrors. Use Value: Configurable thermal foldback prevents overheating during prolonged high-brightness UI use, preserving display lifetime and color fidelity. |
Use Scenario: Driving position lamps or DRLs requiring AEC-Q100 compliance and robust fault reporting. IC Role / Device Role / Timing Role: Standalone LED driver with integrated OVP/short detection and FAULT pin signaling for ASIL-B diagnostic coverage. Use Value: Real-time open/short detection and cycle-by-cycle current limiting meet functional safety requirements without external monitoring ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP8865YQDMTRQ1 | Buck-boost topology; same VSON-14 package, 2.6A MOSFET, spread spectrum enabled. | Supports wider LED string voltage range (VOUT > VIN or < VIN); suitable for mixed-voltage lighting modules. | Select when LED forward voltage varies across operating conditions and exceeds input rail. |
| LP8865ZQDMTRQ1 | Buck topology; same VSON-14 package, 2.6A MOSFET, spread spectrum enabled. | Optimized for VOUT < VIN; higher efficiency at low LED string voltages (e.g., single-LED DRLs). | Select when LED string voltage is consistently below battery voltage and thermal headroom is constrained. |
Compared with LP8865XQDMTRQ1, LP8865YQDMTRQ1 supports buck-boost operation for variable-output applications, while LP8865ZQDMTRQ1 offers higher efficiency in fixed low-Vf configurations - all share identical pinout, protection features, and AEC-Q100 Grade 1 qualification.
Availability
LP8865XQDMTRQ1 is available at Aetrix Electronics and suitable for automotive instrument clusters, heads-up displays (HUD), and infotainment backlighting requiring stable component supply, AEC-Q100 compliance, and production-grade traceability.
Supply support for LP8865XQDMTRQ1 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and automotive ICs, with decades of automotive qualification expertise and ISO/TS 16949-certified manufacturing.
The LP8865-Q1 product line targets high-reliability automotive LED lighting systems, delivering multi-topology flexibility, inductive fast dimming, and comprehensive fault protection for next-generation cockpit and exterior lighting.
FAQ
What topology does LP8865XQDMTRQ1 support?
LP8865XQDMTRQ1 is factory-configured for boost topology only. It cannot be reconfigured to buck or buck-boost modes. This is fixed at silicon level and confirmed in TI's comparison table - LP8865X-Q1 variant explicitly lists "Boost" under Topology. The OVP pin is active, while UVP is unused in this variant.
Does LP8865XQDMTRQ1 support inductive fast dimming (IFD)?
Yes, LP8865XQDMTRQ1 supports inductive fast dimming (IFD) via its adaptive off-time current-mode control architecture. This enables 150ns minimum PWM pulse width and high-accuracy current regulation at low duty cycles - essential for flicker-free HUD and cluster illumination.
What is the maximum output current capability of LP8865XQDMTRQ1?
LP8865XQDMTRQ1 supports up to 2A output current in boost topology, determined by its integrated 2.6A/150mΩ MOSFET and cycle-by-cycle current limit of 2.6A (typical). Actual LED current is set externally via the sense resistor (Rsense = 200mV / ILED).
How is switching frequency configured on LP8865XQDMTRQ1?
Switching frequency on LP8865XQDMTRQ1 is set using an external resistor (RFSET) between the FSET pin and AGND. Values range from 9kΩ (2.2MHz) to 232kΩ (100kHz). Spread spectrum is enabled by default in the X/Y/Z-Q1 variants, reducing EMI peaks.
What fault protections are integrated into LP8865XQDMTRQ1?
LP8865XQDMTRQ1 integrates LED open/short detection, cycle-by-cycle current limiting, thermal shutdown at 165°C, configurable thermal foldback (starting at 130°C), and switching FET failure protection. All faults assert the open-drain FAULT pin for system-level diagnostics.
LP8865XQDMTRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 63V
- Voltage - Output:
- 0V ~ 63V
- Current - Output / Channel:
- 2.5A
- Frequency:
- 100kHz ~ 2.2MHz
- Dimming:
- Analog, PWM
- Applications:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 14-VSON (4.5x3)
LP8865XQDMTRQ1 FAQ
1.How can I place an order for LP8865XQDMTRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP8865XQDMTRQ1 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 LP8865XQDMTRQ1 reliable?
The price and inventory of LP8865XQDMTRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP8865XQDMTRQ1 is usually 5 days.
3.What payment methods are accepted for LP8865XQDMTRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP8865XQDMTRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP8865XQDMTRQ1?
LP8865XQDMTRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP8865XQDMTRQ1 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 LP8865XQDMTRQ1?
For technical support, including LP8865XQDMTRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP8865XQDMTRQ1 requirements.
6.How does Aetrix verify that LP8865XQDMTRQ1 is sourced from the original manufacturer or authorized distributors?
All LP8865XQDMTRQ1 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 LP8865XQDMTRQ1 meets industry standards.
7.What is the process for return or replacement of LP8865XQDMTRQ1?
All LP8865XQDMTRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LP8865XQDMTRQ1, 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 LP8865XQDMTRQ1 part is unused and in its original packaging.
Return procedure for LP8865XQDMTRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP8865XQDMTRQ1 Tags
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BCR402RE6327HTSA1
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BCR420UE6433HTMA1
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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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BCR420UFD-7
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BCR421UFD-7
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