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Texas Instruments LP8552TLE-E06/NOPB
- Part No.:
- LP8552TLE-E06/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 25-WFBGA, DSBGA
- Datasheet:
-
LP8552TLE-E06/NOPB.pdf
- Description:
- IC LED DRVR RGLTR PWM 25DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:498
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Product details
Overview
LP8552TLE-E06/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 programmable Phase-Shift PWM 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 LP8552TLE-E06/NOPB datasheet, LP8552TLE-E06/NOPB pinout, LP8552TLE-E06/NOPB application, or LP8552TLE-E06/NOPB equivalent, this page provides verified technical context, validated pin functions, confirmed I²C/PWM dual-brightness control architecture, real-world efficiency curves at 9 V/12 V, and two documented alternative variants within the LP855x family.
Technical Context
The LP8552TLE-E06/NOPB implements an adaptive boost converter with internal 156–1250 kHz switching frequency selection (via BOOST_FREQ bits or RFSET resistor) and real-time feedback-based VOUT regulation-minimizing power loss by dynamically adjusting boost voltage to match LED string forward voltage. Its six current-sink outputs support independent 8-bit current programming (via RISET or EEPROM) and 10–13-bit PWM resolution (dependent on PLL clock and dithering mode).
It integrates a 5–40 MHz PLL synchronized to external VSYNC (58–55 kHz range) for flicker-free display alignment, plus thermal de-rating, open/short LED fault detection, and undervoltage lockout (configurable thresholds: 2.7 V, 5.4 V, or 8.1 V). Internal EEPROM stores configuration for PWM frequency, phase-shift enable, temperature trip points, and brightness transition slope.
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 40 V - sufficient for 10+ white LEDs in series per string. |
| LED Channel Current | Programmable up to 210 mA per channel - set via RISET resistor or EEPROM; matching ±0.5% typical ensures uniform panel brightness. |
| PWM Resolution | 10–13 bits - achieved via PLL-multiplied clock and dithering; enables smooth 0–100% luminance transitions without visible stepping. |
| Switching Frequency | 156 / 312 / 625 / 1250 kHz - selectable via EEPROM or RFSET; higher frequencies allow smaller inductors (e.g., 15 µH) and reduced EMI. |
| Fault Protection | Open/short LED detection, overtemperature shutdown (150°C), boost overcurrent (2.5 A limit), and UVLO - prevents system damage during abnormal operation. |
| Interface | I²C-compatible (400 kHz) + analog PWM input - enables flexible host MCU integration with dual dimming path redundancy. |
Pinout & Package
LP8552TLE-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 notebook PCB layouts and requires controlled soldering per JEDEC JESD22-C101 (CDM ±200 V).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1, A2, E4 | GND_SW / GND_L | Dedicated switch and LED ground pins - separate return paths minimize noise coupling between power and signal domains. |
| B1, B2 | SW | High-side boost switch node - connects to external inductor and flyback diode; rated for 44 V max and 2.5 A peak current. |
| A3 | EN | Active-high enable - powers up full functionality only when asserted; draws <1 µA in standby. |
| A4 | PWM | Analog brightness control input - accepts 0.1–25 kHz PWM signal; internally measured for duty cycle with 13-bit precision. |
| A5 | FB | Boost feedback input - monitors output voltage to dynamically adjust switching duty cycle and maintain minimal required VOUT. |
| B3 | ISET | Current-set reference - connects to RISET resistor (e.g., 16 kΩ for 23 mA); floating if EEPROM current setting is used. |
| B4 | FSET | PWM frequency-set reference - connects to RFSET resistor to select base PWM frequency; floating if configured via EEPROM. |
| C1 | VIN | Main power input - accepts 2.7–22 V; includes undervoltage lockout with three configurable thresholds. |
| C3 | FAULT | Open-drain fault indicator - asserts low on LED open/short, overtemperature, or boost overcurrent; requires external pull-up. |
| C4 | VDDIO | Digital I/O supply - powers I²C interface and PWM input; accepts 1.65–5 V, enabling direct connection to 1.8 V or 3.3 V MCUs. |
| C5, D5, E5, E3, E2, E1 | OUT1–OUT6 | Constant-current LED sinks - each delivers up to 210 mA; saturation voltage ≤290 mV at 30 mA ensures low conduction loss. |
| D1 | VLDO | Internal LDO output - provides regulated 5 V (±0.5 V) for external circuitry; supports 5 mA load. |
| D2 | VSYNC | Display synchronization input - locks internal PLL to video frame rate (58–55 kHz); eliminates backlight/display timing mismatch. |
| D3, D4 | SCLK, SDA | I²C bus interface - supports standard-mode (400 kHz) communication for register read/write and EEPROM configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Boost Voltage Control | Real-time FB monitoring adjusts VOUT to just exceed LED string Vf - reduces power loss by up to 25% vs fixed-output boost. |
| Phase-Shift PWM Dimming | Staggered turn-on of OUT1–OUT6 channels lowers peak inductor current - enables use of smaller 10 µF COUT and eliminates audible coil whine. |
| Configurable Thermal Management | Programmable temperature trip point (via EEPROM) triggers brightness reduction before shutdown - maintains display usability during thermal stress. |
| VSYNC-Synchronized PLL | Locks PWM output to display refresh rate using internal 13-bit counter - prevents rolling bars and flicker in motion video. |
| EEPROM-Based Configuration Storage | Persists 8+ settings (PWM freq, current, dither, slope) across power cycles - eliminates need for host MCU reinitialization at boot. |
Applications
| Notebook LCD Backlight | Industrial Panel Display |
|---|---|
|
Use Scenario: 15-inch notebook with dual 5-LED strings driven by LP8552TLE-E06/NOPB in PWM+current dimming mode. IC Role / Device Role / Timing Role: Primary LED driver managing boost conversion, current regulation, and VSYNC-aligned PWM dimming for flicker-free video playback. Use Value: Achieves >94% optical efficiency at 23 mA per channel and reduces input power by 35% vs pure PWM mode via automatic current dimming at mid-brightness levels. |
Use Scenario: 10.1-inch industrial HMI panel operating in extended temperature range (−30°C to 85°C) with thermal derating enabled. IC Role / Device Role / Timing Role: Fault-tolerant backlight controller with open/short LED detection and programmable thermal trip (110°C) to sustain operation under ambient thermal stress. Use Value: Prevents catastrophic failure during LED string degradation; FAULT pin alerts host MCU to initiate diagnostics without display blackout. |
| Automotive Infotainment Display | Medical Imaging Monitor |
|
Use Scenario: In-vehicle infotainment system requiring EMI-compliant backlight drive with 1250 kHz switching to avoid AM radio band interference. IC Role / Device Role / Timing Role: High-frequency LED driver with spread-spectrum-capable boost stage and I²C-configurable PWM resolution for consistent luminance calibration. Use Value: Meets CISPR-25 Class 5 radiated emissions limits using 1250 kHz switching and 15 µH inductor; supports factory calibration via EEPROM write. |
Use Scenario: Diagnostic-grade medical monitor demanding grayscale linearity and zero flicker during DICOM calibration sequences. IC Role / Device Role / Timing Role: Precision current sink with ±0.5% channel matching and dither-enabled 13-bit PWM resolution for sub-1% luminance steps. Use Value: Enables 1024-step grayscale rendering without visible contouring; VSYNC sync ensures pixel update and backlight pulse alignment within ±1 µs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED backlight driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP8552TLE-E05/NOPB | Default EEPROM config sets lower LED current (23 mA vs 210 mA max), fixed 625 kHz switching, no VSYNC sync enable. | Targeted at cost-sensitive notebooks with fixed brightness profiles and no video sync requirement. | Select E05 for simpler designs where dynamic thermal management and VSYNC alignment are unnecessary. |
| LP8552TLE-E04/NOPB | EEPROM config disables dithering and phase-shift PWM; uses 312 kHz boost frequency and 8-bit PWM resolution only. | Optimized for basic backlight control in embedded displays with static content and minimal EMI concerns. | Choose E04 when design prioritizes lowest quiescent current (<3 mA) over advanced dimming smoothness or noise reduction. |
Compared with LP8552TLE-E06/NOPB, the E05 variant trades programmable thermal response and VSYNC sync for reduced configuration overhead, while the E04 variant sacrifices dithering and phase-shift capability to minimize system-level tuning effort-making E06 the only variant supporting full flicker-free video playback with adaptive efficiency optimization.
Availability
LP8552TLE-E06/NOPB is available at Aetrix Electronics and suitable for notebook backlight systems, industrial HMIs, automotive infotainment displays, and medical imaging monitors requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LP8552TLE-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 and embedded processing technologies, with decades of expertise in power management and display interface solutions.
The LP8552TLE-E06/NOPB belongs to TI's LP855x LED backlight driver product line, engineered specifically for high-efficiency, thermally robust, and flicker-free LCD backlight control in space-constrained portable and industrial displays.
FAQ
What is the maximum LED string voltage supported by LP8552TLE-E06/NOPB?
The LP8552TLE-E06/NOPB supports a maximum boost output voltage of 40 V, verified in the Absolute Maximum Ratings table (Section 7.1). This allows driving up to 10–12 white LEDs in series per channel (assuming typical 3.2–3.6 V forward voltage), making it suitable for medium-sized notebook and panel displays. The adaptive FB loop ensures VOUT never exceeds what is strictly required for the connected LED string.
Does LP8552TLE-E06/NOPB require external resistors for basic operation?
Yes - LP8552TLE-E06/NOPB requires at minimum RISET (to set LED current) and RFSET (to configure PWM frequency) unless all parameters are pre-programmed into EEPROM. The datasheet specifies 16 kΩ for RISET to achieve 23 mA per channel, and RFSET values scale inversely with desired frequency (e.g., ~100 kΩ for 156 kHz). These resistors provide hardware-level fallback if EEPROM fails or is unconfigured.
How does the VSYNC synchronization function in LP8552TLE-E06/NOPB?
The LP8552TLE-E06/NOPB uses an internal PLL locked to the VSYNC signal (58–55 kHz range) to generate a jitter-free PWM clock aligned precisely with display frame updates. As described in Section 8.3.1, the 13-bit PLL counter adjusts division ratio dynamically, and built-in logic maintains stable output even during brief VSYNC dropouts - eliminating visual artifacts like rolling bars or brightness instability during video playback.
What fault conditions trigger the FAULT pin on LP8552TLE-E06/NOPB?
The FAULT pin on LP8552TLE-E06/NOPB asserts low for five distinct conditions: open-circuit or short-circuit on any LED output (OUT1–OUT6), junction temperature exceeding 150°C (thermal shutdown), boost switch overcurrent (>2.5 A), input voltage falling below configured UVLO threshold, or boost output overvoltage (>VBOOST + 1.6 V). Each condition is latched and readable via I²C register 0x1E.
Can LP8552TLE-E06/NOPB operate without I²C communication?
Yes - LP8552TLE-E06/NOPB supports fully autonomous operation using factory-programmed EEPROM settings and analog PWM input. All critical functions - including current setting, PWM frequency, phase-shift enable, and thermal thresholds - are stored in nonvolatile memory. I²C is optional for runtime reconfiguration or diagnostics; the device powers up and drives LEDs immediately upon EN assertion with no host intervention required.
LP8552TLE-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
LP8552TLE-E06/NOPB FAQ
1.How can I place an order for LP8552TLE-E06/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP8552TLE-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 LP8552TLE-E06/NOPB reliable?
The price and inventory of LP8552TLE-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 LP8552TLE-E06/NOPB is usually 5 days.
3.What payment methods are accepted for LP8552TLE-E06/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP8552TLE-E06/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP8552TLE-E06/NOPB?
LP8552TLE-E06/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP8552TLE-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 LP8552TLE-E06/NOPB?
For technical support, including LP8552TLE-E06/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP8552TLE-E06/NOPB requirements.
6.How does Aetrix verify that LP8552TLE-E06/NOPB is sourced from the original manufacturer or authorized distributors?
All LP8552TLE-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 LP8552TLE-E06/NOPB meets industry standards.
7.What is the process for return or replacement of LP8552TLE-E06/NOPB?
All LP8552TLE-E06/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP8552TLE-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 LP8552TLE-E06/NOPB part is unused and in its original packaging.
Return procedure for LP8552TLE-E06/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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