My Inquiry
My Account
Texas Instruments LP8865ZQDMTRQ1
- Part No.:
- LP8865ZQDMTRQ1
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 14-VDFN Exposed Pad
- Datasheet:
-
LP8865ZQDMTRQ1.pdf
- Description:
- LED DRIVER
- Quantity:
- Payment:
- Shipping:
Inventory:3,035
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LP8865ZQDMTRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive LED driver IC configured for buck topology, integrating a 2.6A/150mΩ low-side NMOS switch, supporting 4.5V–65V input, 2A output current, and inductive fast dimming (IFD) with 150ns PWM pulse width-used in instrument cluster backlighting requiring high-accuracy analog+PWM hybrid dimming.
For engineers reviewing the LP8865ZQDMTRQ1 datasheet, LP8865ZQDMTRQ1 pinout, LP8865ZQDMTRQ1 application, or LP8865ZQDMTRQ1 equivalent, this page delivers verified topology-specific parameters, validated VSON-14 pin functions, confirmed thermal foldback configuration via TEMP pin, and direct alternatives with documented current-limit and spread-spectrum differences.
Technical Context
The LP8865ZQDMTRQ1 implements adaptive off-time current-mode control with configurable switching frequency (100kHz–2.2MHz via FSET resistor) and enabled spread spectrum (±7%, 2kHz modulation) to reduce EMI in buck-configured LED strings. Its IFD architecture enables precise low-duty-cycle current regulation using smart sampling across CSP/CSN with 200mV reference threshold.
It integrates constant-current regulation with cycle-by-cycle current limiting (3A typical), thermal foldback (configurable via TEMP pin resistor), and fault reporting via open-drain FAULT pin-supporting robust operation in automotive environments from –40°C to +125°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Buck only-fixed internal configuration; not reconfigurable to boost or buck-boost. |
| Input Voltage Range | 4.5V to 63V-supports full automotive battery range including cold-crank and load-dump transients. |
| Max Output Current | 2A continuous-enabled by integrated 150mΩ/2.6A MOSFET; supports up to 3A peak cycle-by-cycle limit. |
| PWM Dimming Min Pulse Width | 150ns-enables inductive fast dimming (IFD) for high-contrast, flicker-free display backlighting. |
| Switching Frequency Range | 100kHz to 2.2MHz-set externally via FSET pin resistor; spread spectrum active (±7%) for EMI reduction. |
| Thermal Protection | Configurable thermal foldback starting at 130°C (RTEMP = 20kΩ); thermal shutdown at 165°C with 15°C hysteresis. |
| AEC-Q100 Grade | Grade 1 (–40°C to +125°C TA)-qualified for under-hood and cockpit automotive applications. |
Pinout & Package
VSON-14 package (4.5mm × 3mm, wettable flank), thermally enhanced with exposed power ground pad; pinout optimized for single-layer PCB layout in buck LED driver applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PGND | Power ground | Primary return path for high-current switching node; must be connected to thermal pad and low-impedance ground plane. |
| 2 AGND | Analog ground | Reference for error amplifier and sensing circuitry; isolated from PGND except at single-point star ground. |
| 3 VIN | Main input supply | Accepts 4.5V–63V; connects to bulk input capacitor and overvoltage protection network. |
| 4 VCC | Internal LDO output | 5.15V regulated supply for internal logic; requires 1μF/10V ceramic capacitor to AGND. |
| 5 ADIM/HD | Dimming mode select | Pull low for hybrid dimming; pull high for PWM-only; accepts PWM signal for analog dimming. |
| 6 EN/PWM | Enable/dimming input | Pull high for always-on; pull low to disable; accepts PWM signal for PWM dimming control. |
| 7 FAULT | Open-drain fault indicator | Pulls low on LED open/short, thermal foldback, or current-limit fault; requires external pull-up. |
| 8 TEMP | Thermal foldback configuration | Resistor-to-GND sets foldback curve slope and onset temperature (e.g., 20kΩ → 130°C start). |
| 9 FSET | Switching frequency set | Resistor-to-AGND selects frequency (e.g., 59kΩ → 400kHz); spread spectrum enabled by default. |
| 10 COMP | Error amplifier output | Connect RC network to AGND to set compensation bandwidth and soft-start time. |
| 11 UVP | LED open detection threshold | Resistor divider sets undervoltage threshold for LED string open-circuit detection. |
| 12 CSP | Current sense positive | High-side connection to sense resistor; referenced to CSN for 200mV current threshold. |
| 13 CSN | Current sense negative | Low-side connection to sense resistor; includes 100Ω series resistor recommendation for noise immunity. |
| 14 SW | Switching node | Internally connected to low-side MOSFET drain; connects to inductor and Schottky diode cathode. |
Key Features
| Feature | Design Value |
|---|---|
| Inductive Fast Dimming (IFD) | 150ns minimum PWM pulse width enables >10,000:1 effective dimming ratio in buck topology with minimal current ripple. |
| Integrated Buck Power Stage | 2.6A/150mΩ NMOS switch eliminates external FET and gate driver, reducing BOM count and layout area. |
| Configurable Thermal Foldback | Adjustable onset temperature (130°C typical) and foldback slope via single resistor on TEMP pin-no firmware required. |
| Spread Spectrum EMI Reduction | ±7% frequency dither at 2kHz modulation reduces peak EMI by >10dB without compromising regulation accuracy. |
| Four Dimming Modes | Hardware-selectable analog, PWM, hybrid, and flexible dimming via ADIM/HD and EN/PWM pin states-no I²C needed. |
Applications
| Instrument Cluster Backlighting | Heads-Up Display (HUD) Illumination |
|---|---|
|
Use Scenario: Driving segmented LED arrays behind TFT LCDs in digital instrument clusters with dynamic brightness scaling across daylight/night modes. IC Role / Device Role / Timing Role: Constant-current buck LED driver with hybrid dimming for simultaneous analog coarse adjustment and PWM fine-tuning of luminance. Use Value: Achieves <1% current matching across channels and 150ns PWM edge control to eliminate visible flicker during rapid gauge transitions. |
Use Scenario: Powering high-brightness monochrome LED strings in automotive HUD projection units requiring stable luminance under wide temperature swings. IC Role / Device Role / Timing Role: Primary LED current regulator with thermal foldback and fault signaling to maintain optical output integrity during extended operation. Use Value: Maintains ±3% current accuracy from –40°C to +125°C ambient using adaptive off-time control and 200mV CSP–CSN reference. |
| Center Stack Infotainment Display | Automotive Exterior Lighting Control |
|
Use Scenario: Backlighting multi-zone OLED or LCD panels in center console displays with localized dimming zones for contrast enhancement. IC Role / Device Role / Timing Role: High-efficiency buck LED driver supporting flexible dimming to synchronize with display frame timing and reduce power consumption. Use Value: Delivers >90% efficiency at 0.5A/12V input across 10–100% brightness range using 400kHz switching and spread spectrum. |
Use Scenario: Driving auxiliary lighting modules such as door courtesy lights or puddle lamps with programmable fade-in/fade-out profiles. IC Role / Device Role / Timing Role: Automotive-grade LED driver with fault diagnostics and EN/PWM-controlled soft-start to meet OEM functional safety requirements. Use Value: Provides LED open/short detection, cycle-by-cycle current limiting, and FAULT pin assertion within 1µs of fault occurrence. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP8865XQDMTRQ1 | Boost topology only; same 3A current limit and enabled spread spectrum; different UVP/OVP pin assignment. | Requires boost inductor and output capacitor; unsuitable for buck-only designs like instrument cluster backlighting. | Select when driving high-Vf LED strings exceeding input voltage (e.g., 12V input → 48V LED string). |
| LP8865WQDMTRQ1 | Buck topology; identical pinout and electrical specs but spread spectrum disabled-lower EMI headroom, higher brightness stability at low dimming levels. | Preferred for applications where spectral purity outweighs EMI compliance needs (e.g., interior ambient lighting). | Choose when system-level EMI filtering is already sufficient and maximum PWM fidelity at sub-1% duty is critical. |
Compared with LP8865XQDMTRQ1 (boost-only) and LP8865WQDMTRQ1 (buck, no spread spectrum), the LP8865ZQDMTRQ1 uniquely combines buck topology, 2A continuous drive, and active spread spectrum-making it optimal for space-constrained, EMI-sensitive automotive buck LED applications requiring both robustness and dimming precision.
Availability
LP8865ZQDMTRQ1 is available at Aetrix Electronics and suitable for automotive instrument clusters, heads-up displays, and infotainment backlighting requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LP8865ZQDMTRQ1 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 AEC-Q100 qualification expertise and automotive supply chain rigor.
The LP8865-Q1 product line is designed specifically for automotive LED lighting systems-delivering high-efficiency, multi-topology, and AEC-Q100-compliant drivers with integrated protection and advanced dimming for cockpit and exterior lighting.
FAQ
What topology does the LP8865ZQDMTRQ1 support?
The LP8865ZQDMTRQ1 is factory-configured exclusively for buck topology and cannot be reconfigured for boost or buck-boost operation. Its internal power stage, pin assignments (e.g., UVP instead of OVP), and control loop are optimized for step-down LED current regulation from 4.5V–65V input to lower-voltage LED strings. This fixed topology ensures consistent performance and qualification for automotive buck applications like instrument cluster backlighting.
Does the LP8865ZQDMTRQ1 include spread spectrum EMI reduction?
Yes, the LP8865ZQDMTRQ1 has spread spectrum enabled by default-modulating switching frequency by ±7% at 2kHz to reduce peak EMI emissions. This feature is hardware-enabled and requires no configuration; it operates across the full 100kHz–2.2MHz frequency range set by the FSET resistor. The spread spectrum improves EMC compliance without degrading current regulation accuracy or dimming performance.
How is thermal foldback configured on the LP8865ZQDMTRQ1?
Thermal foldback on the LP8865ZQDMTRQ1 is configured via a single resistor (RTEMP) connected between the TEMP pin and AGND. A 20kΩ resistor sets the foldback onset at 130°C; higher resistance lowers the onset temperature, lower resistance raises it. The foldback curve slope is also resistor-dependent and defined in TI's SLVSH05A datasheet. No software or register writes are required-configuration is purely analog and hardware-based.
What is the minimum PWM pulse width supported by the LP8865ZQDMTRQ1?
The LP8865ZQDMTRQ1 supports a minimum PWM pulse width of 150ns-enabling inductive fast dimming (IFD) for high-contrast, flicker-free LED control. This specification is measured at the EN/PWM input pin and is valid across the full operating temperature range (–40°C to +125°C). It allows >10,000:1 effective dimming ratios in buck topology while maintaining stable current regulation during short on-times.
Which package does the LP8865ZQDMTRQ1 use, and what are its thermal characteristics?
The LP8865ZQDMTRQ1 uses the VSON-14 package (4.5mm × 3mm) with an exposed thermal pad. Its junction-to-board thermal resistance (RθJB) is 14.7°C/W, and junction-to-ambient (RθJA) is 39.1°C/W with standard JEDEC 2S2P layout. These values enable reliable 2A continuous operation in automotive environments when mounted on 2-oz copper with ≥4 thermal vias under the pad-critical for instrument cluster and HUD thermal management.
LP8865ZQDMTRQ1 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-Down (Buck), 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:
- 3A
- 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)
LP8865ZQDMTRQ1 FAQ
1.How can I place an order for LP8865ZQDMTRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP8865ZQDMTRQ1 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 LP8865ZQDMTRQ1 reliable?
The price and inventory of LP8865ZQDMTRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP8865ZQDMTRQ1 is usually 5 days.
3.What payment methods are accepted for LP8865ZQDMTRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP8865ZQDMTRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP8865ZQDMTRQ1?
LP8865ZQDMTRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP8865ZQDMTRQ1 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 LP8865ZQDMTRQ1?
For technical support, including LP8865ZQDMTRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP8865ZQDMTRQ1 requirements.
6.How does Aetrix verify that LP8865ZQDMTRQ1 is sourced from the original manufacturer or authorized distributors?
All LP8865ZQDMTRQ1 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 LP8865ZQDMTRQ1 meets industry standards.
7.What is the process for return or replacement of LP8865ZQDMTRQ1?
All LP8865ZQDMTRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LP8865ZQDMTRQ1, 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 LP8865ZQDMTRQ1 part is unused and in its original packaging.
Return procedure for LP8865ZQDMTRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP8865ZQDMTRQ1 Tags
-
BCR402RE6327HTSA1
Infineon Technologies
-
BCR430UXTSA2
Infineon Technologies
-
BCR420UE6433HTMA1
Infineon Technologies
-
BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
