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Texas Instruments LP8867CQPWPRQ1
- Part No.:
- LP8867CQPWPRQ1
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LP8867CQPWPRQ1.pdf
- Description:
- IC LED DRVR RGLTR PWM 20HTSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LP8867CQPWPRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive LED driver IC with integrated boost/SEPIC DC-DC converter and four precision current sinks for LCD backlighting. It delivers up to 120 mA per channel, supports 4.5 V–40 V input, regulates output up to 45 V, and achieves 10,000:1 dimming ratio at 100 Hz in infotainment display systems.
For engineers reviewing the LP8867CQPWPRQ1 datasheet, LP8867CQPWPRQ1 pinout, LP8867CQPWPRQ1 application, or LP8867CQPWPRQ1 equivalent, key selection criteria include adaptive boost voltage control, spread-spectrum EMI reduction, fault detection (open/short LED, OVP/UVLO, thermal shutdown), and PWM brightness interface compatibility with automotive microcontrollers.
Technical Context
The LP8867CQPWPRQ1 integrates a current-mode DC-DC controller with internal 3.3-A switch FET, configurable 300 kHz–2.2 MHz switching frequency via RFSET resistor, and real-time adaptive output voltage control based on monitored OUTx cathode voltages. Its dual-mode (boost/SEPIC) topology enables flexible LED string supply under wide input transients including load dump.
It features four independent analog current sinks with 1% typical matching, programmable via ISET resistor, and synchronized PWM dimming (100 Hz–20 kHz). Fault management includes open/short LED detection, VIN OVP/UVLO (42 V / 3.85 V), FB OVP (2.3 V), SW OVP, and thermal shutdown at 165°C with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LED Channels | 4 independent current sinks, each up to 120 mA - supports multi-zone automotive LCD backlighting with external string combination. |
| Input Voltage Range | 4.5 V to 40 V - withstands automotive stop-start and load-dump conditions without external pre-regulation. |
| Max Output Voltage | 45 V - sufficient for driving high-VF LED strings in HUD and instrument cluster applications. |
| Switching Frequency | 300 kHz to 2.2 MHz - adjustable via RFSET resistor; enables EMI optimization and layout flexibility across frequency bands. |
| Dimming Ratio | 10,000:1 at 100 Hz - enables high-contrast, flicker-free backlight control for safety-critical displays. |
| Current Matching | 1% typical - ensures uniform luminance across multiple LED zones without per-channel calibration. |
| Thermal Shutdown | 165°C activation, 145°C release - protects against sustained overloads while maintaining operation near thermal limits. |
Pinout & Package
LP8867CQPWPRQ1 is housed in a thermally enhanced 20-pin HTSSOP package (6.50 mm × 4.40 mm) with exposed thermal pad for PCB-level heat dissipation. Pin count and function align precisely with LP8867C-Q1 PWP variant per TI SNVSBC7 datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1, 20) | Power input & OVP sensing | Dual-input configuration supports robust voltage monitoring; triggers 42 V OVP protection and 3.85 V UVLO. |
| OUT1–OUT4 (Pins 15, 14, 13, 12) | LED current sink outputs | Four 120-mA capable sinks; unused channels must be grounded to disable and exclude from adaptive voltage loop. |
| ISET (Pin 10) | Current programming reference | Resistor (20 kΩ–129 kΩ) sets full-scale LED current; enables precise per-string current tuning. |
| FSET (Pin 3) | Switching frequency control | Resistor (24 kΩ–219 kΩ) configures 300 kHz–2.2 MHz switching - critical for EMI compliance and efficiency trade-offs. |
| SYNC (Pin 6) | External clock input | Enables synchronization to system clock (300–2200 kHz); disables spread spectrum when asserted high. |
| PWM (Pin 7) | Brightness control interface | Accepts 100 Hz–20 kHz PWM signal; output replicates input duty cycle with no added latency or phase shift. |
| FAULT (Pin 5) | Open-drain fault indicator | Asserts low on LED open/short, VIN OVP/UVLO, thermal shutdown, or SW OVP - simplifies system-level diagnostics. |
| VDDIO/EN (Pin 4) | Enable & digital I/O supply | Active-high enable; supplies 4.3 V LDO output for PWM/SYNC logic - eliminates need for external level-shifting. |
| FB (Pin 16) | Boost/SEPIC feedback node | Connects to resistor divider (R1/R2 ≥5 kΩ) to set max output voltage; enables adaptive voltage control loop. |
| SW (Pin 18) | Internal FET switch node | Drives external inductor; integrates 3.35-A current limit with 1.6 s temporary 3.7-A boost for cold-start transients. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Boost Voltage Control | Monitors OUTx cathode voltages in real time to dynamically adjust VOUT to minimum required level - reduces power loss and heat generation by up to 15% vs fixed-output designs. |
| Spread Spectrum + SYNC Support | ±3% frequency dithering at 1-kHz modulation plus external clock sync (300–2200 kHz) - lowers peak EMI by >10 dB, easing CISPR 25 Class 5 compliance. |
| Integrated 3.3-A Switch FET | Eliminates external MOSFET and gate driver; supports 45-V output with 240 mΩ RDS(on) - reduces BOM count and PCB area by 30% vs discrete solutions. |
| AEC-Q100 Grade 1 Qualification | Validated for −40°C to +125°C ambient operation with full electrical characterization - meets functional safety requirements for ASIL-B automotive subsystems. |
| Comprehensive Fault Detection | Detects LED open/short, VIN OVP/UVLO, boost OVP, SW OVP, and thermal overload - provides single-pin FAULT output for fail-safe system response. |
Applications
| Automotive Infotainment Display | Instrument Cluster Backlight |
|---|---|
|
Use Scenario: High-resolution TFT-LCD backlight in center-stack head units with dynamic dimming zones. IC Role / Device Role / Timing Role: Four-channel LED driver providing independent current control per display region; adaptive boost maintains efficiency during variable content brightness. Use Value: Enables 10,000:1 contrast ratio and uniform luminance across temperature (-40°C to +125°C), meeting OEM display quality specs. |
Use Scenario: Analog gauge and digital segment backlighting in vehicle dashboards with start-stop cycling. IC Role / Device Role / Timing Role: Constant-current source for red/green/blue LED strings; wide 4.5–40 V input handles battery voltage sag and load dump events. Use Value: Eliminates need for external pre-regulator; 1% current matching ensures consistent color balance across all segments. |
| Smart Mirror Illumination | Heads-Up Display (HUD) Backlight |
|
Use Scenario: Edge-lit electrochromic mirror with ambient light-adaptive brightness control. IC Role / Device Role / Timing Role: PWM-driven current sink delivering stable 120 mA per string; FAULT pin signals LED failure to MCU for diagnostic logging. Use Value: Supports seamless dimming from 0.01% to 100% without visible steps - critical for glare-free night driving experience. |
Use Scenario: High-brightness projection-based HUD requiring thermal-stable LED current under hood temperatures. IC Role / Device Role / Timing Role: Four-channel driver powering parallel LED arrays; thermal shutdown (165°C) prevents luminance drift during prolonged operation. Use Value: Maintains ±1% current accuracy across junction temperature range - ensures consistent image brightness and focus alignment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP8869CQPWPRQ1 | 3-channel version with identical pinout, specs, and feature set - shares same HTSSOP-20 package and 120 mA/channel rating. | Used where fewer LED strings reduce system cost and complexity; requires rework of current-sink routing on PCB. | Select LP8869CQPWPRQ1 only if design uses ≤3 LED zones; LP8867CQPWPRQ1 offers direct scalability to 4 zones without layout change. |
| TPS61165DRVR | Single-channel 40-V boost LED driver with 1.2-MHz fixed frequency; lacks adaptive voltage control, spread spectrum, and multi-channel matching. | Suitable for simple monochrome displays; cannot support multi-zone dimming or meet AEC-Q100 Grade 1 temperature range. | Choose TPS61165DRVR only for non-automotive or single-string applications where cost is primary constraint and EMI/thermal performance is secondary. |
Compared with LP8869CQPWPRQ1, LP8867CQPWPRQ1 adds one dedicated current sink for expanded backlight zoning without changing footprint or thermal design; versus TPS61165DRVR, it delivers automotive-grade reliability, multi-channel precision, and integrated EMI mitigation - essential for safety-critical displays.
Availability
LP8867CQPWPRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, instrument cluster, and HUD backlighting applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LP8867CQPWPRQ1 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 and embedded processing technologies, with decades of automotive qualification expertise and ISO/TS 16949-certified manufacturing.
The LP8867CQPWPRQ1 belongs to TI's automotive LED driver product line, engineered specifically for high-reliability LCD backlighting in safety-critical vehicle displays - emphasizing EMI robustness, thermal resilience, and functional safety compliance.
FAQ
What is the maximum LED string voltage supported by LP8867CQPWPRQ1?
The LP8867CQPWPRQ1 supports up to 45 V output voltage on its boost/SEPIC converter, enabling direct drive of high-forward-voltage LED strings commonly used in automotive HUD and instrument cluster applications. This rating is validated across the full −40°C to +125°C operating temperature range and includes built-in 2.3-V FB OVP protection to prevent overvoltage damage to connected LEDs.
How does adaptive voltage control improve efficiency in LP8867CQPWPRQ1?
LP8867CQPWPRQ1 continuously monitors the cathode voltages of active OUT1–OUT4 pins and adjusts the boost output voltage to the minimum level required to maintain regulated current - typically within 0.5 V of the highest LED string VF. This reduces power dissipation in the current sinks by up to 15% compared to fixed-output drivers, directly lowering thermal stress and improving system efficiency, especially at partial brightness.
Can LP8867CQPWPRQ1 be synchronized to an external clock?
Yes, LP8867CQPWPRQ1 supports external synchronization via the SYNC pin, accepting input frequencies from 300 kHz to 2.2 MHz. When SYNC is driven high, the internal spread-spectrum function is disabled and the converter locks to the external clock - enabling deterministic EMI placement and elimination of beat frequencies in multi-converter systems such as dual-display automotive platforms.
What fault conditions does LP8867CQPWPRQ1 detect and report?
LP8867CQPWPRQ1 detects and reports LED open/short circuits, VIN overvoltage (42 V threshold) and undervoltage (3.85 V falling threshold), boost output overvoltage (via FB pin), SW node overvoltage, and thermal overload (165°C activation). All faults assert the open-drain FAULT pin low, allowing microcontroller polling or interrupt-driven diagnostics without additional sensing circuitry.
Is LP8867CQPWPRQ1 pin-compatible with other devices in the LP886xC-Q1 family?
Yes, LP8867CQPWPRQ1 shares identical 20-pin HTSSOP (PWP) packaging and pinout with LP8869CQPWPRQ1, enabling drop-in replacement between 4-channel and 3-channel variants. Both devices use the same PCB footprint, thermal pad layout, and external component values - simplifying platform design and reducing qualification effort across display variants.
LP8867CQPWPRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- SEPIC, Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 3
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 45V
- Voltage - Output:
- 6V ~ 45V
- Current - Output / Channel:
- 120mA
- Frequency:
- 300kHz ~ 2.2MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-HTSSOP
LP8867CQPWPRQ1 FAQ
1.How can I place an order for LP8867CQPWPRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP8867CQPWPRQ1 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 LP8867CQPWPRQ1 reliable?
The price and inventory of LP8867CQPWPRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP8867CQPWPRQ1 is usually 5 days.
3.What payment methods are accepted for LP8867CQPWPRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP8867CQPWPRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP8867CQPWPRQ1?
LP8867CQPWPRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP8867CQPWPRQ1 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 LP8867CQPWPRQ1?
For technical support, including LP8867CQPWPRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP8867CQPWPRQ1 requirements.
6.How does Aetrix verify that LP8867CQPWPRQ1 is sourced from the original manufacturer or authorized distributors?
All LP8867CQPWPRQ1 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 LP8867CQPWPRQ1 meets industry standards.
7.What is the process for return or replacement of LP8867CQPWPRQ1?
All LP8867CQPWPRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LP8867CQPWPRQ1, 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 LP8867CQPWPRQ1 part is unused and in its original packaging.
Return procedure for LP8867CQPWPRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP8867CQPWPRQ1 Tags
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