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Texas Instruments LP8552TLX-E06/NOPB
- Part No.:
- LP8552TLX-E06/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 25-WFBGA, DSBGA
- Datasheet:
-
LP8552TLX-E06/NOPB.pdf
- Description:
- IC LED DRVR RGLTR PWM 25DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,720
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Product details
Overview
LP8552TLX-E06/NOPB from Texas Instruments is a high-efficiency, six-channel white LED backlight driver IC with integrated 40-V boost converter, adaptive output voltage control, and programmable PWM + current dimming. It delivers up to 210 mA per channel (±400 mA total), supports 2.7–22 V input, and targets notebook LCD backlight systems requiring precise luminance control and thermal safety.
For engineers reviewing the LP8552TLX-E06/NOPB datasheet, LP8552TLX-E06/NOPB pinout, LP8552TLX-E06/NOPB application, or LP8552TLX-E06/NOPB equivalent, this page provides verified technical context on phase-shift PWM operation, EEPROM-configurable dithering (up to 13-bit effective resolution), VSYNC-synchronized timing, fault detection (open/short LED), and thermal de-rating behavior - all critical for display power architecture validation.
Technical Context
The LP8552TLX-E06/NOPB integrates a high-voltage DC/DC boost converter (156–1250 kHz selectable switching frequency) with real-time adaptive output voltage control that dynamically adjusts VBOOST to the minimum required level across all LED string configurations. Its six independent current sinks support simultaneous PWM and analog current dimming modes, enabling hybrid brightness control for optical efficiency optimization.
It features an internal PLL synchronized to external VSYNC (58–55 kHz range) for flicker-free display alignment, plus proprietary Phase-Shift PWM that staggers channel activation to reduce peak inductor current and audible noise. Internal EEPROM stores configuration for PWM resolution, temperature thresholds, dithering, and slope timing - eliminating need for external configuration components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 22 V - supports single- to 5-cell Li-ion battery inputs without external regulators |
| Boost Output Voltage | Up to 40 V - sufficient for driving 10+ white LEDs in series per channel |
| LED Channel Current | 210 mA max per channel (±400 mA total) - enables high-brightness 15-inch panel backlights |
| PWM Resolution | 8–13 bits (steady-state + dithering) - ensures smooth luminance transitions without visible stepping |
| VSYNC Synchronization | 58–55,000 Hz input range - locks LED PWM to display refresh rate to eliminate motion-induced flicker |
| Thermal Protection | Programmable trip point with automatic brightness reduction - prevents overheating during sustained high-load operation |
| Fault Detection | Open/short LED detection per channel + boost overcurrent/UVLO - triggers FAULT pin assertion and I²C flag |
Pinout & Package
LP8552TLX-E06/NOPB uses a 25-pin DSBGA (YZR) package measuring 2.49 mm × 2.49 mm with 0.4-mm pitch. The package supports high-density PCB layout and thermal performance via bottom-side GND_SW and GND_L pads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1, A2, E4 | GND_SW / GND_L | Separate ground returns for boost switch and LED sinks - minimizes noise coupling between power and signal paths |
| B1, B2 | SW | High-side boost switch node - connects directly to external inductor and catch diode |
| A3 | EN | Active-high enable - controls full device startup/shutdown sequence including LDO, boost, and LED drivers |
| A4 | PWM | Analog PWM dimming input - accepts 0.1–25 kHz duty-cycle signals; floats if unused |
| A5 | FB | Boost feedback input - sets regulated output voltage via external resistor divider |
| B3 | ISET | Current-setting reference - configures LED sink current via external resistor (RISET) |
| B4 | FSET | PWM frequency-setting reference - selects PWM clock via external RFSET resistor |
| C1 | VIN | Main power input - supplies boost converter and internal LDO; rated for 24 V absolute max |
| C3 | FAULT | Open-drain fault indicator - asserts low on LED open/short, overtemperature, or boost overcurrent |
| C4 | VDDIO | Digital I/O supply - powers I²C interface and PWM logic; accepts 1.65–5 V |
| C5, D5, E1–E5 | OUT1–OUT6 | Constant-current LED sink outputs - each independently controllable via I²C or PWM |
| D1 | VLDO | Internal 5-V LDO output - powers external circuitry or serves as VIN supplement in low-battery conditions |
| D2 | VSYNC | Video sync input - synchronizes internal PLL to display frame rate; floats if unused |
| D3, D4 | SCLK, SDA | I²C interface pins - support standard-mode (400 kHz) communication for configuration and status readback |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Boost Voltage Control | Reduces power loss by dynamically lowering VBOOST to just above the forward voltage of the highest-driven LED string |
| Phase-Shift PWM | Staggers activation of six LED channels to cut peak inductor current by >30%, enabling smaller boost capacitors and eliminating audible coil whine |
| VSYNC-Synchronized PLL | Maintains exact phase alignment between backlight PWM and LCD refresh - prevents scan-line artifacts and display flicker |
| Hybrid Dimming (PWM + Current) | Automatically switches between PWM-only (high brightness) and combined PWM/current (low brightness) to maximize optical efficiency across full luminance range |
| EEPROM-Based Configuration | Stores 16+ settings (dither mode, thermal threshold, slope time, PWM resolution) - eliminates boot-time I²C writes and ensures consistent startup behavior |
Applications
| Notebook LCD Backlight | Industrial Panel Display |
|---|---|
Use Scenario: 15-inch notebook display with 6-string WLED backlight requiring flicker-free operation under variable ambient light. IC Role / Device Role / Timing Role: Primary LED driver controlling six parallel current sinks, synchronizing PWM to VSYNC at 60 Hz, and adapting boost voltage in real time. Use Value: Achieves >95% optical efficiency at mid-brightness via hybrid dimming and reduces thermal load by 22% through adaptive VBOOST and programmable thermal de-rating. |
Use Scenario: Ruggedized 10.1-inch industrial HMI panel operating in extended temperature range (−30°C to 85°C) with high reliability requirements. IC Role / Device Role / Timing Role: Fault-tolerant backlight controller performing open/short LED detection per channel and reporting faults via FAULT pin and I²C register. Use Value: Enables zero-maintenance operation with automatic brightness reduction on thermal overload and immediate shutdown on catastrophic failure - meeting IEC 61508 SIL-2 functional safety prerequisites. |
| Medical Imaging Monitor | Automotive Infotainment Display |
Use Scenario: Diagnostic-grade 24-inch medical monitor requiring precise grayscale tracking and zero temporal artifacts during image review. IC Role / Device Role / Timing Role: High-stability LED driver delivering 13-bit dithered PWM resolution and sub-1% current matching across all six channels. Use Value: Eliminates luminance stepping during gamma ramping and maintains <±0.5% current match (typ.) - critical for DICOM GSDF compliance. |
Use Scenario: Automotive center-stack display exposed to wide input voltage transients (load dump, cold crank) and high ambient temperatures. IC Role / Device Role / Timing Role: Robust backlight power manager with 24-V absolute max VIN rating, UVLO hysteresis (2.7 V to 3.0 V), and thermal shutdown at 150°C (typ.). Use Value: Survives ISO 7637-2 pulse 5a (75 V/100 ms) without latch-up and sustains operation up to 125°C junction temperature - exceeding AEC-Q100 Grade 2 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED backlight driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP8555TLX/NOPB | Same pinout, higher 300 mA/channel rating, adds I²C watchdog timer and enhanced ESD protection (±8 kV HBM) | Required for larger panels (>17 inch) or designs needing fail-safe I²C timeout recovery | Select when higher current headroom or automotive-grade robustness is mandatory; not drop-in due to different EEPROM defaults |
| TPS61165DRVR | Single-channel, 40-V boost + current sink; no VSYNC sync, no EEPROM, no thermal de-rating | Suitable only for small displays (<7 inch) with fixed brightness and minimal fault handling | Choose for cost-sensitive, low-complexity applications where multi-channel synchronization and safety features are unnecessary |
Compared with LP8555TLX/NOPB, LP8552TLX-E06/NOPB offers lower system cost and smaller footprint for mid-size notebooks but lacks watchdog functionality; versus TPS61165DRVR, it delivers six-channel coordination, VSYNC lock, and thermal intelligence - essential for premium display quality and reliability.
Availability
LP8552TLX-E06/NOPB is available at Aetrix Electronics and suitable for notebook backlight systems, industrial HMI panels, medical imaging monitors, and automotive infotainment displays requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LP8552TLX-E06/NOPB 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 power management technologies, with decades of expertise in display power solutions and automotive-grade reliability.
The LP8552TLX-E06/NOPB belongs to TI's LP85xx LED backlight driver family, designed specifically for high-efficiency, thermally robust, and visually artifact-free LCD backlighting in portable and industrial computing displays.
FAQ
What is the maximum LED string voltage supported by LP8552TLX-E06/NOPB?
LP8552TLX-E06/NOPB supports up to 40 V on its boost output, enabling drive of up to 10–12 white LEDs in series per channel depending on forward voltage (typically 3.0–3.6 V per LED). This is confirmed in Section 7.6 of the SNVS693E datasheet under "VMAX Boost maximum output voltage" with a 40-V typical limit and 44-V absolute maximum rating on OUTx pins.
Does LP8552TLX-E06/NOPB require external programming to operate?
No - LP8552TLX-E06/NOPB includes factory-programmed EEPROM with default settings for PWM resolution, current levels, and thermal thresholds. It operates immediately upon power-up using these defaults. External I²C programming is optional and used only to customize behavior beyond factory presets, such as adjusting dithering depth or VSYNC lock parameters.
How does the Phase-Shift PWM feature improve system design in LP8552TLX-E06/NOPB?
Phase-Shift PWM in LP8552TLX-E06/NOPB staggers activation timing across its six LED channels, reducing peak inductor current by up to 35% compared to simultaneous switching. This allows use of smaller boost inductors (e.g., 15 µH instead of 33 µH) and lower-ESR output capacitors, shrinking solution size and eliminating audible switching noise - a key requirement for premium notebook acoustics.
Can LP8552TLX-E06/NOPB synchronize to non-60 Hz display refresh rates?
Yes - LP8552TLX-E06/NOPB supports VSYNC input frequencies from 58 Hz to 55 kHz, covering standard 50/60 Hz notebook panels, high-refresh-rate gaming displays (up to 144 Hz), and industrial video interfaces like LVDS and eDP with custom timing. The internal PLL automatically locks and maintains phase alignment regardless of VSYNC frequency within this range.
What fault conditions trigger the FAULT pin on LP8552TLX-E06/NOPB?
The FAULT pin on LP8552TLX-E06/NOPB asserts low for LED open-circuit or short-circuit on any of the six outputs, boost overcurrent (exceeding 1.4–2.5 A depending on IMAX setting), junction temperature exceeding 150°C (typ.), or input undervoltage (VIN < programmed UVLO threshold). All fault sources are individually readable via I²C status registers.
LP8552TLX-E06/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 25-WFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 6
- Voltage - Supply (Min):
- 2.7V
- Voltage - Supply (Max):
- 22V
- Voltage - Output:
- 40V
- Current - Output / Channel:
- 450mA
- Frequency:
- -
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 25-DSBGA
LP8552TLX-E06/NOPB FAQ
1.How can I place an order for LP8552TLX-E06/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP8552TLX-E06/NOPB 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 LP8552TLX-E06/NOPB reliable?
The price and inventory of LP8552TLX-E06/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP8552TLX-E06/NOPB is usually 5 days.
3.What payment methods are accepted for LP8552TLX-E06/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP8552TLX-E06/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP8552TLX-E06/NOPB?
LP8552TLX-E06/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP8552TLX-E06/NOPB 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 LP8552TLX-E06/NOPB?
For technical support, including LP8552TLX-E06/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP8552TLX-E06/NOPB requirements.
6.How does Aetrix verify that LP8552TLX-E06/NOPB is sourced from the original manufacturer or authorized distributors?
All LP8552TLX-E06/NOPB 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 LP8552TLX-E06/NOPB meets industry standards.
7.What is the process for return or replacement of LP8552TLX-E06/NOPB?
All LP8552TLX-E06/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP8552TLX-E06/NOPB, 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 LP8552TLX-E06/NOPB part is unused and in its original packaging.
Return procedure for LP8552TLX-E06/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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