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Texas Instruments LP8552TLE-E04/NOPB
- Part No.:
- LP8552TLE-E04/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 25-WFBGA, DSBGA
- Datasheet:
-
LP8552TLE-E04/NOPB.pdf
- Description:
- IC LED DRVR RGLTR PWM 25DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:485
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Product details
Overview
LP8552TLE-E04/NOPB from Texas Instruments is a high-voltage LED backlight driver IC with integrated 22-V boost converter, six programmable current-sink outputs (OUT1–OUT6), I²C/PWM dual brightness control, and adaptive output voltage regulation. It delivers up to 210 mA per channel with ±4% current accuracy, supports VSYNC synchronization, and targets notebook LCD backlight systems requiring high optical efficiency and low audible noise.
For engineers reviewing the LP8552TLE-E04/NOPB datasheet, LP8552TLE-E04/NOPB pinout, LP8552TLE-E04/NOPB application, or LP8552TLE-E04/NOPB equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternative options, and supply-chain support details specific to the E04 configuration.
Technical Context
The LP8552TLE-E04/NOPB implements an adaptive boost architecture that dynamically adjusts VBOOST based on real-time LED forward voltage monitoring-minimizing power loss across varying string configurations and temperature. Its proprietary Phase-Shift PWM reduces peak inductor current by staggering output switching, enabling smaller boost capacitors and eliminating audible coil whine.
It integrates a 5-MHz internal oscillator with PLL-based clock synthesis supporting VSYNC lock (58–55 kHz range) and selectable PWM resolution (8–13 bits). EEPROM-programmable parameters include current setpoint, PWM frequency, thermal de-rating thresholds, dithering behavior, and phase-shift enable-all retained without external nonvolatile memory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5.5 V to 22 V - supports 2–5-cell Li-ion battery operation with automatic UVLO threshold selection (E04 config uses 5.4 V nominal trip) |
| Boost Output Voltage | Up to 40 V - dynamically regulated to minimum required level for connected LED strings, reducing power dissipation |
| LED Output Current | 210 mA max per channel (OUT1–OUT6) - ±4% accuracy at 23 mA with matched current sinks (0.5% typical matching) |
| PWM Resolution | 13-bit true resolution - achieved via dithering during brightness transitions, enabling smooth luminance ramping without visible stepping |
| VSYNC Synchronization | 58–55 kHz input range - PLL locks to display timing signal to eliminate flicker and ensure frame-aligned dimming |
| Thermal Protection | Programmable de-rating & shutdown - reduces brightness at 125°C junction, fully disables boost/outputs at 150°C (typ.) |
| I²C Interface | Standard-mode (400 kHz) - compatible with 1.65–5 V VDDIO, supports register read/write for full configuration and fault status reporting |
Pinout & Package
LP8552TLE-E04/NOPB is housed in 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 optimal noise isolation between power, signal, and LED return paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1, A2, B1, B2 | Boost switch ground / Boost switch | GND_SW and SW pins form low-inductance power loop for boost FET; critical for EMI and efficiency |
| A3 | Enable input | Active-high logic control; enables full device operation including boost, LDO, and LED drivers |
| A4 | PWM dimming input | Analog input accepting 0.2×VDDIO–0.8×VDDIO logic levels; left floating if unused |
| A5 | Boost feedback | Resistor-divider input setting regulated VBOOST; determines maximum output voltage |
| B3 | Current set resistor | Analog input setting LED sink current via RISET (E04 config defaults to 210 mA with 16 kΩ) |
| B4 | PWM frequency set resistor | Analog input selecting base PWM frequency (156/312/625/1250 kHz); RFSET used when EEPROM not configured |
| C1 | Main input supply | Primary power rail (5.5–22 V); powers boost stage, internal LDO, and logic circuitry |
| C3 | Fault open-drain output | Active-low indicator for LED open/short, overtemperature, overcurrent, or UVLO events |
| C4 | Digital I/O reference | Supplies 1.65–5 V reference for I²C and PWM inputs; decoupled with 1 µF capacitor |
| D1 | LDO output | 5-V regulated output (±5%) for external circuitry; can be bypassed with external 5-V rail in low-VIN applications |
| D2 | VSYNC input | Synchronizes internal PWM clock to display vertical refresh; must tie to GND if unused |
| D3, D4 | I²C clock/data | Standard-mode interface (400 kHz) for configuration, status readback, and dynamic adjustment |
| E1–E5, C5, D5 | LED current sinks | Six independent constant-current outputs (OUT1–OUT6); each supports 0–210 mA with 8-bit programming |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Boost Voltage Control | Reduces VBOOST to just above LED string Vf sum, cutting power loss by up to 30% vs fixed-output boost designs |
| Phase-Shift PWM | Staggers ON-times across six outputs, lowering peak input current by >40% and allowing 30% smaller input capacitors |
| VSYNC-Locked PLL | Eliminates temporal mismatch between LCD panel update and backlight dimming, preventing visible flicker or motion artifacts |
| EEPROM Configuration Storage | Retains all settings (current, PWM freq, thermal thresholds, dither mode) without external NVM or host MCU intervention |
| Multi-Level Fault Detection | Identifies open-circuit, short-circuit, overtemperature, overcurrent, and undervoltage faults-each reported via FAULT pin and I²C register |
Applications
| Notebook LCD Backlight | Industrial Panel Display |
|---|---|
Use Scenario: 15-inch notebook display with 6-LED edge-lit backlight driven from 3-cell Li-ion battery (9–12.6 V). IC Role / Device Role / Timing Role: Primary LED driver managing boost conversion, current regulation, and synchronized PWM dimming aligned to display VSYNC. Use Value: Achieves >94% optical efficiency at 250 nits using combined PWM + current dimming, extending battery life by 18% versus fixed-current-only schemes. | Use Scenario: 10.4-inch industrial HMI panel operating in extended temperature range (−30°C to 85°C) with variable ambient lighting. IC Role / Device Role / Timing Role: Constant-current LED driver with programmable thermal de-rating and fault reporting for reliable backlight control in unattended equipment. Use Value: Maintains consistent luminance across temperature via EEPROM-stored current calibration and automatic brightness reduction above 125°C junction. |
| Medical Imaging Monitor | Automotive Infotainment Display |
Use Scenario: Diagnostic-grade 24-inch medical monitor requiring flicker-free, DICOM-compliant grayscale rendering. IC Role / Device Role / Timing Role: Precision LED current controller with 13-bit dithered PWM and VSYNC lock to ensure pixel-perfect luminance stability across frame updates. Use Value: Delivers <0.5% luminance variation between frames, meeting clinical imaging requirements for contrast fidelity and artifact suppression. | Use Scenario: 12.3-inch digital instrument cluster powered from 9–16 V automotive battery with EMC-sensitive environment. IC Role / Device Role / Timing Role: EMI-optimized LED driver using phase-shift PWM and dedicated ground domains to meet CISPR-25 Class 5 radiated emissions limits. Use Value: Reduces conducted emissions by 12 dBµV at 150 kHz–30 MHz, eliminating need for additional ferrite beads or shielding. |
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 | Higher max output current (300 mA/channel), added analog dimming input, same pinout and EEPROM structure | Better suited for larger panels (>17") or higher-brightness automotive displays requiring >250 mA per string | Select LP8557TLE/NOPB when scaling to higher-power LED strings without redesigning PCB layout |
| TPS61165DRVR | Single-channel, 40-V boost with 30-mA max sink; no VSYNC sync, no EEPROM, no phase-shift PWM | Targeted at cost-sensitive, single-string applications where advanced dimming and fault reporting are not required | Choose TPS61165DRVR only for simple, low-channel-count backlight systems with minimal feature requirements |
Compared with LP8557TLE/NOPB, the LP8552TLE-E04/NOPB offers lower quiescent current and tighter current matching but lacks analog dimming; versus TPS61165DRVR, it provides six-channel integration, VSYNC lock, and EEPROM retention-making it suitable for premium notebook and medical displays where reliability and precision outweigh cost sensitivity.
Availability
LP8552TLE-E04/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 traceability.
Supply support for LP8552TLE-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 technologies, with decades of expertise in high-efficiency LED drivers and power conversion ICs.
The LP8552 product line was designed specifically for medium-format LCD backlight applications demanding high optical efficiency, ultra-low audible noise, and robust fault handling in space-constrained portable devices.
FAQ
What is the default LED current setting for LP8552TLE-E04/NOPB?
The LP8552TLE-E04/NOPB is factory-configured with EEPROM settings corresponding to 210 mA maximum output per channel (OUT1–OUT6) when RISET = 16 kΩ. This value is stored in address A5h (0100 0101 binary) and can be reprogrammed via I²C without hardware changes. The LP8552TLE-E04/NOPB maintains this setting across power cycles due to on-chip EEPROM retention.
Does LP8552TLE-E04/NOPB require external EEPROM for configuration storage?
No, LP8552TLE-E04/NOPB contains integrated EEPROM that stores all configuration parameters-including current setpoints, PWM frequency, thermal thresholds, and dithering modes-eliminating the need for external nonvolatile memory. The LP8552TLE-E04/NOPB retains these settings indefinitely and survives power cycling, simplifying system design and reducing BOM count.
How does the Phase-Shift PWM feature in LP8552TLE-E04/NOPB reduce audible noise?
The LP8552TLE-E04/NOPB staggers the ON-times of its six LED outputs using Phase-Shift PWM, distributing boost converter current demand across time. This lowers peak inductor current by over 40%, reducing mechanical vibration in magnetics and eliminating coil whine in the 2–20 kHz audible range. The LP8552TLE-E04/NOPB achieves this without external components or firmware intervention.
Can LP8552TLE-E04/NOPB operate with input voltage below 5.5 V?
Yes, LP8552TLE-E04/NOPB supports input voltages as low as 2.7 V when an external 5-V rail is supplied to the VLDO pin (D1), as specified in Figure 31 of the datasheet. In this mode, VIN powers only the boost stage while VLDO supplies the internal LDO and digital logic. The LP8552TLE-E04/NOPB maintains full functionality including I²C communication and fault reporting under this configuration.
What fault conditions trigger the FAULT pin on LP8552TLE-E04/NOPB?
The FAULT pin on LP8552TLE-E04/NOPB asserts low for LED open/short detection, input undervoltage (UVLO), boost overcurrent, overtemperature (junction ≥150°C), and internal LDO failure. Each condition is latched and readable via I²C register 0x0A. The LP8552TLE-E04/NOPB continues normal operation after fault clearance unless thermal shutdown persists, ensuring robust system-level diagnostics without interrupting display function unnecessarily.
LP8552TLE-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
LP8552TLE-E04/NOPB FAQ
1.How can I place an order for LP8552TLE-E04/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP8552TLE-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 LP8552TLE-E04/NOPB reliable?
The price and inventory of LP8552TLE-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 LP8552TLE-E04/NOPB is usually 5 days.
3.What payment methods are accepted for LP8552TLE-E04/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP8552TLE-E04/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP8552TLE-E04/NOPB?
LP8552TLE-E04/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP8552TLE-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 LP8552TLE-E04/NOPB?
For technical support, including LP8552TLE-E04/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP8552TLE-E04/NOPB requirements.
6.How does Aetrix verify that LP8552TLE-E04/NOPB is sourced from the original manufacturer or authorized distributors?
All LP8552TLE-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 LP8552TLE-E04/NOPB meets industry standards.
7.What is the process for return or replacement of LP8552TLE-E04/NOPB?
All LP8552TLE-E04/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP8552TLE-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 LP8552TLE-E04/NOPB part is unused and in its original packaging.
Return procedure for LP8552TLE-E04/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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