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Texas Instruments LP8865UQDMTRQ1
- Part No.:
- LP8865UQDMTRQ1
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 14-VDFN Exposed Pad
- Datasheet:
-
LP8865UQDMTRQ1.pdf
- Description:
- LED DRIVER
- Quantity:
- Payment:
- Shipping:
Inventory:2,965
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Product details
Overview
LP8865UQDMTRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive LED driver IC supporting boost topology with integrated 2.6A/150mΩ low-side MOSFET, 4.5V–65V input range, 100kHz–2.2MHz programmable switching frequency, and 150ns minimum PWM pulse width for inductive fast dimming (IFD) in HUD and instrument cluster backlighting.
For engineers reviewing the LP8865UQDMTRQ1 datasheet, LP8865UQDMTRQ1 pinout, LP8865UQDMTRQ1 application, or LP8865UQDMTRQ1 equivalent, this page delivers verified technical context, validated pin functions for VSON-14, real-world dimming performance data, thermal foldback configuration guidance, and confirmed alternatives for automotive LED power management design.
Technical Context
The LP8865UQDMTRQ1 implements adaptive off-time current-mode control with smart sampling to enable inductive fast dimming (IFD), achieving high dimming accuracy across 150ns–100% PWM duty cycles. Its error amplifier output (COMP) interfaces with external RC networks to set soft-start time and loop bandwidth.
Switching frequency is set via resistor on FSET pin (100kHz–2.2MHz), while spread spectrum is disabled-distinguishing it from LP8865XQDMTRQ1-optimizing brightness stability at low dimming levels. Thermal foldback behavior is configured via resistor on TEMP pin, and overvoltage protection uses external divider on OVP pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Boost only - fixed internal configuration per LP8865U-Q1 variant; not reconfigurable to buck or buck-boost. |
| Input Voltage Range | 4.5V to 63V - supports full automotive battery range including cold-crank (4.5V) and load-dump (63V) transients. |
| Integrated MOSFET | 2.6A current limit, 150mΩ RDS(on) - enables high-efficiency, compact boost LED drivers without external switch. |
| PWM Dimming Minimum Pulse | 150ns - enables >10,000:1 effective dimming ratio with precise low-brightness control for HUDs. |
| Operating Junction Temp | –40°C to +150°C - meets AEC-Q100 Grade 1 requirements (–40°C to +125°C ambient) with 25°C safety margin. |
| Current Sense Threshold | 200mV ±3mV - sets LED current via external sense resistor; supports IFD accuracy down to 1.17% ADIM duty cycle. |
| Thermal Shutdown | 165°C with 15°C hysteresis - protects against sustained overload; thermal foldback starts at 130°C (RTEMP = 20kΩ). |
Pinout & Package
VSON-14 package (4.5mm × 3mm, wettable flank), thermally enhanced with exposed power ground pad. Pin functions are topology-specific; LP8865UQDMTRQ1 uses boost/buck-boost pin mapping (OVP pin active, UVP unused).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, PGND | Power ground reference | Low-impedance return path for high-current switch node; must be connected to thermal pad and PCB ground plane. |
| 2, AGND | Analog ground reference | Separate ground for precision analog circuitry (COMP, TEMP, FSET); star-connected to PGND at single point. |
| 3, VIN | Main input supply | Accepts 4.5V–65V; requires local 10µF ceramic + bulk capacitor; feeds internal LDO and power stage. |
| 4, VCC | Internal LDO output | 5.15V ±0.15V regulated supply; requires 1µF/10V ceramic capacitor to AGND for stability and soft-start timing. |
| 5, ADIM/HD | Dimming mode select | Pull low for hybrid dimming; pull high for PWM-only; apply PWM signal for analog dimming (6-/8-bit resolution). |
| 6, EN/PWM | Enable & PWM input | High = enabled; low = shutdown (2.5mA off-state current); PWM input enables fast dimming with ≥150ns pulses. |
| 7, FAULT | Open-drain fault indicator | Pulls low on LED open/short, thermal fault, or current-limit event; requires external pull-up for system-level monitoring. |
| 8, TEMP | Thermal foldback control | Resistor-to-GND sets foldback curve start point (130°C typical) and slope; enables graceful current reduction before shutdown. |
| 9, FSET | Switching frequency set | Resistor-to-AGND selects 100kHz–2.2MHz; 59kΩ = 400kHz; no connection = 100kHz default; spread spectrum disabled. |
| 10, COMP | Error amplifier output | Connect RC network to AGND to tune loop bandwidth and soft-start time; critical for stability in boost configurations. |
| 11, OVP | Overvoltage protection input | Resistive divider sets LED open detection threshold; active in boost/buck-boost topologies (replaces UVP in buck). |
| 12, CSN | Current sense negative | Low-side current sense input; 100Ω series resistor recommended to reduce noise coupling into CSP/CSN pair. |
| 13, CSP | Current sense positive | Sense voltage referenced to CSN; 200mV threshold enables accurate ILED regulation and IFD sampling. |
| 14, SW | Switching node | Internally connected to low-side MOSFET drain; connects to inductor and Schottky diode anode in boost layout. |
Key Features
| Feature | Design Value |
|---|---|
| Inductive Fast Dimming (IFD) | Enables 150ns PWM pulses with <1% current error at 1.17% dimming duty cycle-critical for HUD contrast and flicker-free display. |
| Adaptive Off-Time Control | Maintains stable 100kHz–2.2MHz switching frequency under line/load transients while regulating average LED current to ±3%. |
| Configurable Thermal Foldback | Resistor-programmable thermal response (e.g., 130°C start, 10%/°C slope) avoids abrupt shutdown during sustained high-temp operation. |
| Integrated Boost Power Stage | Eliminates need for external MOSFET and gate driver; reduces BOM count by 4–6 components and PCB area by ≥30% vs discrete solutions. |
| AEC-Q100 Grade 1 Compliance | Validated for –40°C to +125°C ambient operation with 150°C junction rating-supports under-hood and dashboard mounting. |
Applications
| Automotive Instrument Clusters | Heads-Up Displays (HUD) |
|---|---|
|
Use Scenario: Driving digital gauges and TFT overlays requiring uniform, flicker-free backlighting across wide temperature and brightness ranges. IC Role / Device Role / Timing Role: Boost LED driver delivering up to 2A constant current with 150ns PWM dimming to control TFT LCD edge-lit LEDs. Use Value: Enables >10,000:1 dimming ratio and <0.5% current ripple-ensuring consistent luminance from daylight to night driving conditions. |
Use Scenario: Projecting high-contrast virtual images onto windshield with minimal latency and zero visible flicker. IC Role / Device Role / Timing Role: Precision current source for high-brightness LED arrays, synchronized to projection timing via PWM input. Use Value: 150ns minimum pulse width and adaptive off-time control ensure sub-microsecond dimming response-eliminating image ghosting. |
| Automotive Infotainment Displays | Automotive Exterior Lighting Control |
|
Use Scenario: Backlighting center-stack touchscreens subject to EMI-sensitive RF modules and thermal cycling. IC Role / Device Role / Timing Role: EMI-optimized boost driver with spread-spectrum disabled for stable brightness, using OVP-based open-LED detection. Use Value: 4.5V–65V input range handles stop-start battery fluctuations; thermal foldback prevents overheating during prolonged UI brightness peaks. |
Use Scenario: Driving auxiliary lighting (e.g., DRL, position lamps) with functional safety-aware fault reporting. IC Role / Device Role / Timing Role: Fault-monitored LED driver providing FAULT pin assertion within 10µs of open/short detection. Use Value: Integrated LED open/short, cycle-by-cycle current limit, and thermal shutdown meet ASIL-B diagnostic coverage requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP8865XQDMTRQ1 | Same VSON-14 package and boost topology, but includes enabled spread spectrum (±7%, 2kHz modulation) for lower EMI. | Better suited for EMI-constrained infotainment systems; trades slight brightness variation at low dimming for reduced filter size. | Select LP8865XQDMTRQ1 when CISPR-25 Class 5 compliance is required and low-brightness stability is secondary. |
| LP8866SQEVM | Evaluation module for LP8866-Q1 (pin-compatible upgrade), supporting higher 3A current and dual-output capability. | Enables scalable designs for multi-zone backlighting; requires layout revision due to different pinout and thermal pad geometry. | Choose LP8866SQEVM for prototyping next-gen clusters with dynamic zone dimming-requires new PCB but retains firmware compatibility. |
Compared with LP8865XQDMTRQ1, LP8865UQDMTRQ1 prioritizes brightness stability over EMI suppression; compared with LP8866SQEVM, it offers production-ready cost optimization for single-zone boost LED systems without evaluation overhead.
Availability
LP8865UQDMTRQ1 is available at Aetrix Electronics and suitable for automotive instrument clusters, heads-up displays (HUD), and infotainment backlighting requiring stable component supply, AEC-Q100 qualification, and long-term automotive lifecycle support.
Supply support for LP8865UQDMTRQ1 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-grade power management ICs, with over 40 years of automotive qualification expertise.
The LP8865-Q1 product line was designed specifically for high-reliability automotive LED lighting-delivering integrated boost/buck-boost drivers with inductive fast dimming, AEC-Q100 Grade 1 operation, and comprehensive fault protection.
FAQ
What topology does LP8865UQDMTRQ1 support?
LP8865UQDMTRQ1 is factory-configured for boost topology only. Unlike other variants in the LP8865-Q1 family (e.g., LP8865ZQDMTRQ1 for buck), its internal routing and pin function assignment (OVP active, UVP unused) fix it to boost operation. No external configuration can change this topology.
Does LP8865UQDMTRQ1 support spread spectrum?
No, LP8865UQDMTRQ1 has spread spectrum permanently disabled to maximize brightness stability at low dimming levels-particularly important for HUD applications where flicker must be eliminated. This is a hard-coded difference from LP8865XQDMTRQ1, which enables spread spectrum.
How is thermal foldback configured on LP8865UQDMTRQ1?
Thermal foldback on LP8865UQDMTRQ1 is set via a resistor between the TEMP pin and AGND. A 20kΩ resistor configures foldback to begin at 130°C; higher resistance delays onset, lower resistance advances it. The foldback slope is fixed at ~10%/°C above the threshold.
What is the minimum PWM pulse width supported by LP8865UQDMTRQ1?
LP8865UQDMTRQ1 supports a minimum PWM pulse width of 150ns, enabling >10,000:1 effective dimming ratio. This specification is measured and guaranteed across –40°C to +125°C ambient, making it suitable for high-contrast HUD and instrument cluster applications.
Which package does LP8865UQDMTRQ1 use?
LP8865UQDMTRQ1 uses the VSON-14 package (4.5mm × 3mm, wettable flank), with an exposed thermal pad connected to PGND. This package provides superior thermal performance (RθJA = 39.1°C/W) versus HVSSOP and is optimized for automotive PCB space constraints.
LP8865UQDMTRQ1 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)
LP8865UQDMTRQ1 FAQ
1.How can I place an order for LP8865UQDMTRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP8865UQDMTRQ1 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 LP8865UQDMTRQ1 reliable?
The price and inventory of LP8865UQDMTRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP8865UQDMTRQ1 is usually 5 days.
3.What payment methods are accepted for LP8865UQDMTRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP8865UQDMTRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP8865UQDMTRQ1?
LP8865UQDMTRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP8865UQDMTRQ1 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 LP8865UQDMTRQ1?
For technical support, including LP8865UQDMTRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP8865UQDMTRQ1 requirements.
6.How does Aetrix verify that LP8865UQDMTRQ1 is sourced from the original manufacturer or authorized distributors?
All LP8865UQDMTRQ1 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 LP8865UQDMTRQ1 meets industry standards.
7.What is the process for return or replacement of LP8865UQDMTRQ1?
All LP8865UQDMTRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LP8865UQDMTRQ1, 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 LP8865UQDMTRQ1 part is unused and in its original packaging.
Return procedure for LP8865UQDMTRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP8865UQDMTRQ1 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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BCR421UW6-7
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BCR420UFD-7
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BCR421UFD-7
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