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Texas Instruments LP8552TLE/NOPB
- Part No.:
- LP8552TLE/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 25-WFBGA
- Datasheet:
-
LP8552TLE/NOPB.pdf
- Description:
- IC LED DRV RGLTR PWM 25USMD
- Quantity:
- Payment:
- Shipping:
Inventory:453
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Product details
Overview
LP8552TLE/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 dimming up to 13-bit resolution. It supports I²C and analog PWM brightness control, phase-shift PWM for reduced audible noise, and VSYNC synchronization for LCD timing alignment - deployed in notebook and netbook LCD backlight systems.
For engineers reviewing the LP8552TLE/NOPB datasheet, LP8552TLE/NOPB pinout, LP8552TLE/NOPB application, or LP8552TLE/NOPB equivalent, key selection criteria include its 2.7–22-V input range, 6-channel constant-current sink capability (up to 210 mA per channel), DSBGA-25 package, thermal de-rating protection, and EEPROM-configurable LED current, PWM frequency, and fault thresholds.
Technical Context
The LP8552TLE/NOPB integrates a high-voltage DC/DC boost converter with adaptive output voltage regulation-dynamically adjusting VBOOST based on real-time LED forward voltage monitoring to minimize power loss. Its six current-sink outputs support independent or synchronized dimming via I²C or hardware PWM inputs.
It employs a proprietary Phase-Shift PWM scheme to stagger LED channel switching, reducing peak inductor current and output capacitor ripple while eliminating audible coil whine. An internal PLL enables precise synchronization of PWM output to external VSYNC signals (58–55 kHz), ensuring flicker-free display operation.
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 and wide industrial input rails. |
| Boost Output Voltage | Up to 40 V - sufficient for driving 10+ white LEDs in series per string. |
| LED Channel Count | 6 independent current sinks - enables full-array local dimming or multi-zone backlighting. |
| PWM Resolution | Up to 13-bit (steady-state + dithering) - delivers smooth, stepless brightness transitions. |
| Switching Frequency | 156 / 312 / 625 / 1250 kHz - selectable via EEPROM or RFSET resistor for EMI optimization. |
| Thermal Protection | Programmable thermal de-rating and shutdown at TJ ≥150°C - prevents overheating in compact notebooks. |
| I²C Interface | Standard-mode (400 kHz) - enables configuration and fault status readback without additional GPIOs. |
Pinout & Package
LP8552TLE/NOPB is housed in a 2.49 mm × 2.49 mm, 25-ball DSBGA (YZR) package with 0.4-mm pitch and bottom-side thermal pad. Pin functions are validated per TI SNVS693E datasheet Rev. E (2014).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1, A2, B1, B2, E4 | GND_SW / GND_S / GND_L | Dedicated ground returns for boost switch, signal logic, and LED sinks - critical for noise isolation and thermal dissipation. |
| C1 | VIN | Main power input (2.7–22 V); supplies boost converter and internal LDO - requires 10 µF ceramic input capacitor. |
| D1 | VLDO | Internal 5-V LDO output; can be bypassed or externally powered in low-VIN applications (e.g., <5.5 V battery). |
| A3 | EN | Active-high enable; controls full device startup/shutdown - must be pulled high for operation. |
| A4 | PWM | Analog PWM dimming input (0.2×VDDIO to 0.8×VDDIO logic levels); used for direct brightness control or duty-cycle measurement. |
| B3 | ISET | Current-setting resistor input; configures LED sink current (e.g., 23 mA typical with 16 kΩ) - floating if EEPROM-configured. |
| B4 | FSET | PWM frequency-setting resistor input; selects base PWM clock (156–1250 kHz) - floating if EEPROM-configured. |
| C4 | VDDIO | Digital I/O reference (1.65–5 V); powers I²C interface and PWM input - decoupled with 1 µF ceramic. |
| C5, D5, E1–E5 | OUT1–OUT6 | Six constant-current sink outputs (max 210 mA each); each drives one LED string - supports open/short fault detection. |
| C3 | FAULT | Open-drain fault indicator; asserts low on LED open/short, overtemperature, overcurrent, or UVLO - requires pull-up resistor. |
| D2 | VSYNC | Video sync input (58–55 kHz); enables PLL-based PWM synchronization to display refresh - must be grounded if unused. |
| D3, D4 | SCLK / SDA | I²C serial interface pins; support configuration, register readback, and fault logging - require pull-ups to VDDIO. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Boost Voltage Control | Real-time VBOOST adjustment minimizes power loss across varying LED forward voltages and temperature drift. |
| Phase-Shift PWM Dimming | Staggered channel switching reduces peak inductor current by >30%, enabling smaller boost inductors and capacitors. |
| VSYNC-Synchronized PWM | PLL locks to display VSYNC (58–55 kHz), eliminating beat-frequency flicker and ensuring temporal alignment with frame updates. |
| EEPROM Configuration Storage | Nonvolatile storage for 8-bit LED current, PWM resolution, thermal thresholds, dither settings, and boost frequency - eliminates external configuration components. |
| Comprehensive Fault Protection | Detects LED open/short, VIN undervoltage, boost overcurrent, overtemperature, and provides FAULT pin assertion + I²C status flag. |
Applications
| Notebook LCD Backlight | Industrial Panel Display |
|---|---|
|
Use Scenario: Driving 6-string WLED array in 13.3-inch notebook display with dynamic brightness scaling. IC Role / Device Role / Timing Role: Primary LED backlight controller managing boost conversion, current regulation, and VSYNC-aligned PWM dimming. Use Value: Achieves >94% efficiency at 150 mA load and eliminates audible noise via phase-shift PWM - extending battery life and improving user experience. |
Use Scenario: Backlighting ruggedized 10.1-inch industrial HMI panel operating from 12-V DC supply. IC Role / Device Role / Timing Role: High-reliability LED driver with thermal de-rating and fault reporting for unattended operation in extended temperature environments. Use Value: Programmable thermal trip point and open/short LED detection ensure continuous operation and predictive maintenance alerts via I²C. |
| Netbook Display System | Medical Diagnostic Monitor |
|
Use Scenario: Compact netbook with space-constrained PCB requiring minimal external components. IC Role / Device Role / Timing Role: Integrated solution combining boost converter, 6-channel current sinks, and EEPROM - replacing discrete controller + MOSFET + sense resistors. Use Value: Reduces BOM count by >12 components and board area by 35% versus discrete implementations - accelerating time-to-market. |
Use Scenario: High-precision diagnostic monitor requiring flicker-free, stable luminance across clinical imaging modes. IC Role / Device Role / Timing Role: Precision LED driver with 0.5% current matching and VSYNC-locked PWM to prevent image artifacts during video capture. Use Value: Ensures <±0.3% luminance stability over 8-hour operation - meeting DICOM GSDF calibration 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 |
|---|---|---|---|
| LP8557TLE/NOPB | Same DSBGA-25 package; adds integrated 5-V LDO regulator and enhanced thermal management (lower RθJA). | Preferred for new designs requiring higher integration and improved thermal headroom in ultra-thin notebooks. | Select LP8557TLE/NOPB when board space is constrained and system-level thermal margin is limited. |
| TPS61165DRVR | Single-channel, 40-V boost LED driver in 6-pin WSON; no I²C, no VSYNC sync, no EEPROM, lower channel count. | Suitable only for simple single-string backlighting - not a functional replacement for 6-channel operation. | Choose TPS61165DRVR only for cost-sensitive, low-complexity displays lacking multi-zone dimming or synchronization needs. |
Compared with LP8552TLE/NOPB, LP8557TLE/NOPB offers tighter thermal performance and integrated LDO but identical feature set and pinout; TPS61165DRVR lacks multi-channel capability and digital configurability, making it suitable only for simplified, non-synchronized applications.
Availability
LP8552TLE/NOPB is available at Aetrix Electronics and suitable for notebook backlight systems, industrial HMI panels, medical display modules, and portable computing devices requiring stable component supply and long-term manufacturability.
Supply support for LP8552TLE/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 - serving automotive, industrial, and consumer markets with high-reliability, production-ready solutions.
The LP8552TLE/NOPB belongs to TI's LED backlight driver product line, engineered specifically for energy-efficient, low-noise, and thermally robust LCD backlighting in portable computing platforms.
FAQ
What is the maximum LED string voltage supported by the LP8552TLE/NOPB?
The LP8552TLE/NOPB supports a maximum boost output voltage of 40 V, verified per Absolute Maximum Ratings (Table 7.1). This allows driving up to 10–12 white LEDs in series per channel (assuming typical VF ≈ 3.2–3.6 V), provided total string voltage remains ≤40 V. Exceeding this limit risks permanent damage to the SW pin and internal FET.
Does the LP8552TLE/NOPB require external programming to operate?
No - the LP8552TLE/NOPB operates immediately upon power-up using factory-default EEPROM settings (e.g., 156-kHz switching frequency, 23-mA LED current, PWM input mode). External I²C programming is optional and used only to customize parameters like thermal thresholds, dithering, or VSYNC synchronization behavior.
Can the LP8552TLE/NOPB drive LED strings with different forward voltages?
Yes - the LP8552TLE/NOPB's adaptive boost control continuously monitors the highest OUTx voltage and adjusts VBOOST to the minimum required level. This ensures optimal efficiency across mismatched LED strings (e.g., due to binning or aging), as confirmed in Section 8.1 and Figure 7 of SNVS693E.
How does the FAULT pin behave during an LED open-circuit event?
During an LED open-circuit condition on any OUT1–OUT6 channel, the LP8552TLE/NOPB asserts the FAULT pin low (open-drain) within 10 ms, as specified in Section 7.7. Simultaneously, the corresponding LED fault bit is set in the I²C status register (address 0x0F), enabling both hardware interrupt and software diagnostics.
Is the LP8552TLE/NOPB RoHS-compliant and lead-free?
Yes - the LP8552TLE/NOPB is marked "NOPB" (No Lead Plating), indicating it meets RoHS Directive 2011/65/EU and JEDEC J-STD-609A Class 1 moisture sensitivity requirements. The DSBGA-25 package uses lead-free solder bumps and matte tin terminations, verified in TI's official packaging documentation.
LP8552TLE/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 25-WFBGA
- 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-uSMD
LP8552TLE/NOPB FAQ
1.How can I place an order for LP8552TLE/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP8552TLE/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/NOPB reliable?
The price and inventory of LP8552TLE/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/NOPB is usually 5 days.
3.What payment methods are accepted for LP8552TLE/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP8552TLE/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP8552TLE/NOPB?
LP8552TLE/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP8552TLE/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/NOPB?
For technical support, including LP8552TLE/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP8552TLE/NOPB requirements.
6.How does Aetrix verify that LP8552TLE/NOPB is sourced from the original manufacturer or authorized distributors?
All LP8552TLE/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/NOPB meets industry standards.
7.What is the process for return or replacement of LP8552TLE/NOPB?
All LP8552TLE/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP8552TLE/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/NOPB part is unused and in its original packaging.
Return procedure for LP8552TLE/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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