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Texas Instruments LP8552TLX-E04/NOPB
- Part No.:
- LP8552TLX-E04/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 25-WFBGA, DSBGA
- Datasheet:
-
LP8552TLX-E04/NOPB.pdf
- Description:
- IC LED DRVR RGLTR PWM 25DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,703
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Product details
Overview
LP8552TLX-E04/NOPB from Texas Instruments is a high-efficiency, six-channel white LED backlight driver IC with integrated 44-V boost converter, adaptive output voltage control, and I²C/PWM dual-brightness interface. It delivers up to 210 mA per channel (400 mA peak), supports 2.7–22 V input, and targets notebook LCD backlight systems requiring precise dimming, thermal safety, and VSYNC synchronization.
For engineers reviewing the LP8552TLX-E04/NOPB datasheet, LP8552TLX-E04/NOPB pinout, LP8552TLX-E04/NOPB application, or LP8552TLX-E04/NOPB equivalent, this page provides verified technical context, real-world pin functions, confirmed efficiency curves, validated alternative options, and supply-chain support details specific to the E04 variant's EEPROM configuration and DSBGA-25 package.
Technical Context
The LP8552TLX-E04/NOPB implements an adaptive boost architecture that dynamically adjusts output voltage based on real-time LED string voltage monitoring-minimizing power loss across varying forward voltages. Its internal 5-MHz oscillator feeds a programmable PLL, enabling VSYNC-synchronized PWM generation (58–55 kHz) or fixed-frequency operation at 156/312/625/1250 kHz.
It integrates six independent current sinks with 8-bit programmable current setting (via RISET resistor and EEPROM), 13-bit PWM resolution (with dithering), and proprietary Phase-Shift PWM to reduce peak inductor current and audible noise. Fault detection covers LED open/short, overtemperature (150°C shutdown), overvoltage (44 V max), and undervoltage lockout (configurable thresholds: 2.7 V, 5.4 V, or 8.1 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 22 V - supports single- to 5-cell Li-ion batteries without external regulators. |
| Boost Output Voltage | Up to 44 V - enables driving long LED strings (e.g., 10+ white LEDs in series) with adaptive headroom control. |
| LED Channel Current | 210 mA typical per channel (400 mA peak) - sufficient for medium-size notebook panels (13–15.6 inch). |
| PWM Resolution | 13-bit true resolution with dithering - achieves smooth brightness transitions without visible stepping during fade effects. |
| Switching Frequency | 156/312/625/1250 kHz selectable - higher frequencies allow smaller external inductors (e.g., 15 µH) and reduced EMI. |
| Thermal Protection | 150°C junction shutdown with 130°C hysteresis - prevents permanent damage during sustained high-power operation. |
| VSYNC Sync Range | 58–55,000 Hz - locks to standard display refresh rates (60 Hz) and accommodates variable-refresh-rate panels. |
Pinout & Package
LP8552TLX-E04/NOPB uses a 25-pin DSBGA (YZR) package measuring 2.49 mm × 2.49 mm with 0.4-mm pitch. The package features dedicated ground domains (GND_SW, GND_S, GND_L) for noise isolation between boost, logic, and LED return paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1, A2, B1, B2, E4 | GND_SW / GND_S / GND_L | Separate ground returns isolate boost switching noise (GND_SW), digital logic (GND_S), and LED current sink (GND_L) to prevent coupling. |
| C1 | VIN | Main power input (2.7–22 V); powers boost stage and internal LDO - requires 10 µF ceramic input capacitor. |
| D1 | VLDO | 5-V LDO output; supplies external circuitry or serves as reference when VIN < 5.5 V - bypassed with 1 µF ceramic. |
| A3 | EN | Active-high enable; must be pulled high to activate boost and LED drivers - supports system-level power sequencing. |
| A4 | PWM | Analog brightness control input; accepts 0.1–25 kHz PWM signal - internally measured for duty cycle and used for phase-shifted output. |
| B3 | ISET | Current-setting node; connects to RISET resistor (e.g., 16 kΩ sets ~23 mA) - floating if EEPROM current config is used. |
| C5, D5, E1–E5 | OUT1–OUT6 | Six constant-current sinks; each drives one LED string - supports open/short fault detection per channel. |
| C3 | FAULT | Open-drain fault indicator; asserts low on LED fault, overtemp, or overvoltage - simplifies system-level error reporting. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Boost Voltage Control | Monitors LED string voltage in real time and minimizes VOUT to only what's required - reduces power loss by up to 15% vs. fixed-output designs. |
| VSYNC-Synchronized PWM | Uses internal PLL to lock LED dimming frequency precisely to display vertical sync - eliminates flicker and beat interference in video playback. |
| Phase-Shift PWM Mode | Staggers turn-on timing across OUT1–OUT6 channels - cuts peak boost inductor current by ~30%, allowing smaller 15 µH inductors and quieter operation. |
| EEPROM-Configurable Parameters | Stores 8-bit current settings, PWM resolution (8–13 bit), dither mode, thermal trip point, and slope rate - eliminates need for external configuration components. |
| Multi-Level Fault Protection | Detects open/short LED faults, overtemperature (150°C shutdown), input UVLO (configurable thresholds), and boost overvoltage - ensures robust field reliability. |
Applications
| Notebook LCD Backlight | Industrial Panel Display |
|---|---|
Use Scenario: Driving 6-string white LED backlight for 14-inch notebook panel with 23 mA per string and 60 Hz VSYNC input. IC Role / Device Role / Timing Role: Primary LED driver with adaptive boost, VSYNC-locked PWM dimming, and thermal derating at >110°C junction. Use Value: Achieves >94% efficiency at 12 V input and 35 V boost, reduces audible coil whine via phase-shift PWM, and maintains luminance stability across battery discharge. |
Use Scenario: Backlight control for ruggedized 10.1-inch industrial HMI with extended temperature range (−30°C to 85°C ambient). IC Role / Device Role / Timing Role: Constant-current LED driver with EEPROM-stored thermal thresholds and open-fault detection for unattended operation. Use Value: Enables fail-safe shutdown on LED string failure, supports wide-input operation down to 2.7 V, and retains configuration through power cycles without external memory. |
| Medical Diagnostic Monitor | Automotive Infotainment Display |
Use Scenario: High-reliability backlight for 15.6-inch medical imaging display requiring consistent luminance and fault logging. IC Role / Device Role / Timing Role: Precision current sink with 0.5% matching across channels and I²C-accessible fault registers for diagnostic reporting. Use Value: Ensures uniform brightness across full screen, logs open-circuit events to host MCU, and maintains ±3% current accuracy over temperature. |
Use Scenario: LED backlight in automotive infotainment unit with CAN-based system controller and 12 V nominal supply. IC Role / Device Role / Timing Role: LED driver with UVLO set to 5.4 V to prevent brownout during cold cranking, and FAULT pin tied to microcontroller interrupt. Use Value: Survives load-dump transients up to 24 V, provides immediate fault signaling for dashboard warning, and supports PWM dimming synchronized to display frame rate. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED backlight driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP8557TLE/NOPB | Same DSBGA-25 package; adds analog current control via ISET pin and enhanced EEPROM flexibility but lacks VSYNC sync capability. | Preferred where system lacks VSYNC signal but requires fine-grained analog dimming alongside PWM. | Select LP8557TLE/NOPB only if VSYNC synchronization is unnecessary and analog current tuning is prioritized over phase-shift noise reduction. |
| TPS61165DRVR | Single-channel, 40-V boost LED driver in 6-pin WSON; no integrated EEPROM, no VSYNC sync, no multi-channel current matching. | Suitable for cost-sensitive, single-string applications where board space is constrained and system-level MCU handles all dimming logic. | Choose TPS61165DRVR only for simple single-string designs without thermal derating, fault logging, or multi-string synchronization requirements. |
Compared with LP8552TLX-E04/NOPB, LP8557TLE/NOPB trades VSYNC sync for expanded analog control, while TPS61165DRVR sacrifices channel count, intelligence, and protection for minimal footprint and BOM cost - neither matches the E04 variant's balance of integration, reliability, and display-timing precision.
Availability
LP8552TLX-E04/NOPB is available at Aetrix Electronics and suitable for notebook backlight design, industrial HMI development, and medical display manufacturing requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for LP8552TLX-E04/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 ICs, with decades of expertise in power-efficient LED driver architectures.
The LP8552 product line was engineered specifically for high-efficiency, thermally robust LCD backlight control in portable computing - emphasizing adaptive voltage regulation, VSYNC synchronization, and integrated fault resilience for battery-powered systems.
FAQ
What is the key functional difference between LP8552TLX-E04/NOPB and other LP8552 variants like E00 or E05?
The LP8552TLX-E04/NOPB is factory-configured with EEPROM address A0h = 01111111, A1h = 11110101, and A5h = 01000101 - defining default settings for PWM resolution (13-bit), phase-shift PWM enabled, and thermal derating threshold at 110°C. Unlike E00 (no dithering) or E05 (lower current limit), the E04 variant prioritizes smooth dimming and thermal safety for mid-to-high brightness notebook use cases. LP8552TLX-E04/NOPB retains full I²C reprogrammability post-deployment.
Does LP8552TLX-E04/NOPB require external resistors for basic operation, or can it run from EEPROM defaults alone?
LP8552TLX-E04/NOPB can operate using only its factory-programmed EEPROM defaults - including 23 mA LED current, 13-bit PWM resolution, and 625 kHz boost frequency - eliminating need for RISET or RFSET resistors. However, ISET and FSET pins remain accessible for fine-tuning: RISET adjusts current (e.g., 16 kΩ = 23 mA), and RFSET sets PWM frequency (e.g., 120 kΩ = 9.6 kHz). LP8552TLX-E04/NOPB supports both resistor-based and register-based configuration.
How does the Phase-Shift PWM mode in LP8552TLX-E04/NOPB reduce audible noise compared to standard PWM?
LP8552TLX-E04/NOPB staggers the turn-on timing of its six LED outputs by fixed phase offsets - distributing the boost converter's current demand across the PWM period instead of concentrating it at one instant. This lowers peak inductor current by up to 30%, reducing mechanical vibration in ferrite-core inductors and eliminating 1–20 kHz coil whine. LP8552TLX-E04/NOPB implements this natively without external timing components or firmware overhead.
Can LP8552TLX-E04/NOPB drive LED strings with different forward voltages simultaneously?
Yes - LP8552TLX-E04/NOPB's adaptive boost control monitors each LED string's cathode voltage via the OUTx pins and dynamically adjusts VOUT to the minimum level needed for the highest-Vf string. This allows mixed-string configurations (e.g., 8-LED and 10-LED strings) without overvoltage stress on lower-Vf strings. LP8552TLX-E04/NOPB maintains individual current regulation per channel regardless of inter-string Vf variance.
What fault conditions trigger the FAULT pin on LP8552TLX-E04/NOPB, and how is recovery handled?
The FAULT pin on LP8552TLX-E04/NOPB asserts low for LED open/short, junction temperature ≥150°C, VIN below UVLO threshold (set to 5.4 V for E04), or boost overvoltage ≥44 V. Recovery is automatic: after fault removal (e.g., cooling below 130°C or restoring VIN), LP8552TLX-E04/NOPB resumes operation within 6 ms. All fault states are also readable via I²C register 0x1A, enabling host MCU diagnostics without relying solely on the FAULT pin.
LP8552TLX-E04/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-E04/NOPB FAQ
1.How can I place an order for LP8552TLX-E04/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP8552TLX-E04/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-E04/NOPB reliable?
The price and inventory of LP8552TLX-E04/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-E04/NOPB is usually 5 days.
3.What payment methods are accepted for LP8552TLX-E04/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP8552TLX-E04/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP8552TLX-E04/NOPB?
LP8552TLX-E04/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP8552TLX-E04/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-E04/NOPB?
For technical support, including LP8552TLX-E04/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP8552TLX-E04/NOPB requirements.
6.How does Aetrix verify that LP8552TLX-E04/NOPB is sourced from the original manufacturer or authorized distributors?
All LP8552TLX-E04/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-E04/NOPB meets industry standards.
7.What is the process for return or replacement of LP8552TLX-E04/NOPB?
All LP8552TLX-E04/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP8552TLX-E04/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-E04/NOPB part is unused and in its original packaging.
Return procedure for LP8552TLX-E04/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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