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Texas Instruments LP5523TMX/NOPB
- Part No.:
- LP5523TMX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 25-WFBGA, DSBGA
- Datasheet:
-
LP5523TMX/NOPB.pdf
- Description:
- IC LED DRVR RGLTR PWM 25DSBGA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LP5523TMX/NOPB from Texas Instruments is a nine-channel high-side RGB- and white-LED driver IC with integrated 1×/1.5× adaptive fractional charge pump, 12-bit PWM control, 8-bit current setting (25.5 mA full-scale), internal program memory, and I²C-compatible interface - designed for autonomous lighting effects in mobile devices powered by single Li-ion batteries (2.7 V to 5.5 V).
For engineers reviewing the LP5523TMX/NOPB datasheet, LP5523TMX/NOPB pinout, LP5523TMX/NOPB application, or LP5523TMX/NOPB equivalent, key selection considerations include its three independent programmable engines, D7–D9 direct-VDD sourcing for red LED efficiency, built-in LED error detection, 10 µA power-save mode current, and DSBGA-25 (2.26 mm × 2.26 mm) package constraints.
Technical Context
The LP5523TMX/NOPB implements three independent program execution engines that each control grouped LED outputs via stored instructions in 96-word SRAM-based program memory. It autonomously selects between 1× and 1.5× charge-pump gain based on forward voltage demands of D1–D6, while D7–D9 are directly powered from VDD to bypass charge-pump loading for red LED elements.
Its architecture integrates temperature-sensing with linear PWM-based luminance compensation across −40°C to +90°C, supports I²C address selection via ASEL0/ASEL1, and provides interrupt (INT), trigger synchronization (TRIG), and general-purpose output (GPO) for system-level coordination - all with 200 nA standby current and soft-start protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Range | 2.7 V to 5.5 V - supports full Li-ion battery voltage range without external regulation. |
| Max Output Current | 25.5 mA per channel - sets absolute ceiling for LED brightness and thermal design margin. |
| PWM Resolution | 12-bit - enables 4096-step dimming granularity for smooth lighting transitions. |
| Current Setting | 8-bit - allows fine-grained per-channel current calibration (e.g., for color balance across RGB LEDs). |
| Charge Pump Efficiency | Up to 94% - minimizes power loss during voltage boosting for WLED/RGB strings. |
| Power-Save Current | 10 µA typical - reduces system idle power when no LED activity is scheduled. |
| I²C Speed | 400 kHz - ensures fast configuration updates and pattern reprogramming in real time. |
Pinout & Package
LP5523TMX/NOPB uses a 25-pin DSBGA (YFQ) package with 0.4-mm pitch and nominal body size 2.26 mm × 2.26 mm. Thermal resistance RθJA is 60.9°C/W, requiring minimal PCB copper area for thermal management in space-constrained mobile designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D1–D6 | High-side current source output | Drive WLEDs or RGB LED cathodes; supplied by adaptive charge pump (VOUT). |
| D7–D9 | High-side current source output | Drive red LED anodes directly from VDD - avoids charge-pump loading and improves efficiency. |
| VOUT | Charge pump regulated output | Provides boosted voltage (up to ~4.5 V in 1.5× mode) for D1–D6; requires 1 µF ceramic capacitor. |
| C1+/C1−, C2+/C2− | Flying capacitor terminals | Interface with two 0.47 µF MLCCs to enable charge-pump operation and gain switching. |
| SCL/SDA | I²C interface | Standard two-wire bus (400 kHz max); SDA is open-drain; supports four selectable addresses via ASEL0/ASEL1. |
| EN | Enable input | Hardware master enable - must be high for device operation; powers down core logic when low. |
| INT | Open-drain interrupt output | Signals microcontroller upon completion of programmed lighting sequence or error event. |
| TRIG | Trigger input | Synchronizes multiple LP5523TMX/NOPB devices for coordinated lighting effects. |
| GPO | General-purpose output | Configurable digital output (push-pull) for controlling auxiliary circuitry (e.g., backlight boost enable). |
| CLK | External clock input | Accepts 32.7 kHz square wave to override internal oscillator for precise timing control. |
Key Features
| Feature | Design Value |
|---|---|
| Three independent program engines | Enables concurrent, non-interfering lighting sequences (e.g., keypad + status + haptic) without MCU intervention. |
| Adaptive 1×/1.5× charge pump | Automatically switches gain to maintain >90% efficiency across varying LED VF and input voltage conditions. |
| Built-in LED error detection | Identifies open/short faults and measures VF, VDD, or INT pin voltage - usable for battery monitoring or ambient light sensing. |
| Temperature-compensated PWM | Adjusts LED duty cycle linearly over −40°C to +90°C using 31 user-selectable slopes - preserves color point and brightness stability. |
| 96-word programmable memory | Stores lighting patterns (e.g., breathing, pulsing, chasing) locally - eliminates continuous MCU polling or data streaming. |
| Source (high-side) drivers | Allows common-cathode LED configurations - simplifies PCB layout and enables flexible LED placement relative to ground plane. |
Applications
| Mobile Keypad Illumination | Smartphone Status Indicator |
|---|---|
|
Use Scenario: Backlighting alphanumeric keys with dynamic color feedback during touch events or notification states. IC Role / Device Role / Timing Role: High-side current source driving 3–6 WLEDs or RGB segments; executes preloaded fade/pulse patterns autonomously. Use Value: Reduces MCU GPIO and processing load while enabling smooth 12-bit dimming and synchronized multi-key effects. |
Use Scenario: Visual alert for incoming calls, messages, or charging status using discrete RGB LEDs near bezel or camera cutout. IC Role / Device Role / Timing Role: Nine-channel driver assigning D1–D3 to red/green/blue; triggers via INT after pattern completion to signal host. Use Value: Delivers consistent color fidelity across temperature via on-chip compensation and eliminates external timing components. |
| Haptic Feedback Lighting | WLED Backlight for Small Displays |
|
Use Scenario: Coordinating LED flash intensity and duration with vibration motor activation for tactile-enhanced notifications. IC Role / Device Role / Timing Role: GPO output synchronizes with TRIG input to align LED pulse edges with motor drive signals; uses D7–D9 for high-efficiency red pulses. Use Value: Enables sub-100 µs timing alignment between optical and mechanical feedback - critical for perceived responsiveness. |
Use Scenario: Driving six parallel white LEDs for OLED or small LCD display backlight in wearables or IoT panels. IC Role / Device Role / Timing Role: D1–D6 configured as constant-current sources; charge pump auto-selects 1× mode at 4.2 V VDD to maximize efficiency (>93%). Use Value: Achieves >90% driver efficiency across full battery discharge curve without external DC/DC converter. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP55231TMX/NOPB | Same die, revised mask set with improved ESD robustness (HBM ±3000 V on logic pins); identical pinout, registers, and firmware compatibility. | No functional change - suitable for new designs requiring enhanced manufacturing yield or field reliability. | Select LP55231TMX/NOPB when long-term supply continuity and higher ESD immunity are prioritized over legacy qualification. |
| LP5562RTER | 12-channel, higher-current (35 mA) variant with enhanced charge pump (95% eff.), but larger 30-pin DSBGA (2.5 mm × 2.5 mm) and no D7–D9 VDD-direct routing. | Supports more complex lighting arrays (e.g., dual RGB + WLED strings) but requires PCB redesign and firmware adaptation. | Choose LP5562RTER only when additional channels or higher per-channel current are required - not a drop-in replacement. |
Compared with LP5523TMX/NOPB, LP55231TMX/NOPB offers identical functionality with strengthened ESD protection, while LP5562RTER expands channel count and current capability at the cost of footprint and layout compatibility - making LP5523TMX/NOPB optimal for compact, cost-sensitive, triple-RGB implementations.
Availability
LP5523TMX/NOPB is available at Aetrix Electronics and suitable for mobile keypad illumination, smartphone status indicators, haptic feedback lighting, and WLED backlighting requiring stable component supply, long-lifecycle support, and automotive-grade traceability.
Supply support for LP5523TMX/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 company specializing in analog, embedded processing, and power management technologies, with leadership in precision analog and low-power IC design.
The LP5523TMX/NOPB belongs to TI's lighting management unit (LMU) product line, engineered specifically for autonomous, energy-efficient LED control in battery-powered portable electronics - emphasizing integration, thermal resilience, and firmware-offload capability.
FAQ
What is the primary function of the LP5523TMX/NOPB in a mobile device?
The LP5523TMX/NOPB serves as a fully integrated nine-channel LED driver that autonomously executes lighting patterns using internal program memory, eliminating continuous MCU involvement. It drives RGB and white LEDs via high-side current sources, incorporates adaptive charge-pump voltage boosting, and supports temperature-compensated PWM dimming - all within a 2.26 mm × 2.26 mm DSBGA package optimized for smartphones and wearables.
How does the LP5523TMX/NOPB manage power efficiency across varying battery voltages?
The LP5523TMX/NOPB maintains high efficiency by dynamically selecting between 1× and 1.5× charge-pump gain based on real-time forward voltage requirements of D1–D6. Meanwhile, D7–D9 are powered directly from VDD to avoid charge-pump loading for red LEDs - preserving >93% LED drive efficiency and enabling 10 µA power-save mode current when inactive.
Can the LP5523TMX/NOPB drive both RGB and white LEDs simultaneously?
Yes, the LP5523TMX/NOPB is explicitly designed for mixed RGB and WLED operation: D1–D6 support white LEDs or green/blue/red elements requiring boosted voltage, while D7–D9 are optimized for red LEDs powered directly from VDD. This architecture enables efficient driving of three full RGB LEDs (R on D7–D9, G/B on D1–D6) without sacrificing brightness or thermal performance.
What role does the TRIG pin play in multi-device synchronization?
The TRIG pin on the LP5523TMX/NOPB accepts a synchronous edge-triggered signal to start or reset program execution across multiple devices. When cascaded, it ensures precise temporal alignment of lighting effects - such as coordinated pulsing across front and rear indicators - without requiring individual I²C commands or timing calibration between units.
Does the LP5523TMX/NOPB require external passive components, and if so, which ones?
Yes, the LP5523TMX/NOPB requires four external ceramic capacitors: one 1 µF output capacitor (COUT) on VOUT, one 1 µF input capacitor (CIN), and two 0.47 µF flying capacitors (C1, C2) connected to C1±/C2± terminals. These low-ESR MLCCs are essential for stable charge-pump operation, noise suppression, and meeting specified efficiency and transient response targets.
LP5523TMX/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:
- Switched Capacitor (Charge Pump)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 9
- Voltage - Supply (Min):
- 2.7V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- -
- Current - Output / Channel:
- 25.5mA
- Frequency:
- -
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -30°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 25-DSBGA
LP5523TMX/NOPB FAQ
1.How can I place an order for LP5523TMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP5523TMX/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 LP5523TMX/NOPB reliable?
The price and inventory of LP5523TMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP5523TMX/NOPB is usually 5 days.
3.What payment methods are accepted for LP5523TMX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP5523TMX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP5523TMX/NOPB?
LP5523TMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP5523TMX/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 LP5523TMX/NOPB?
For technical support, including LP5523TMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP5523TMX/NOPB requirements.
6.How does Aetrix verify that LP5523TMX/NOPB is sourced from the original manufacturer or authorized distributors?
All LP5523TMX/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 LP5523TMX/NOPB meets industry standards.
7.What is the process for return or replacement of LP5523TMX/NOPB?
All LP5523TMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP5523TMX/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 LP5523TMX/NOPB part is unused and in its original packaging.
Return procedure for LP5523TMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP5523TMX/NOPB Tags
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BCR402RE6327HTSA1
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BCR430UXTSA2
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BCR420UE6433HTMA1
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BCR421UE6327HTSA1
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LYT1604D-TL
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HV9910CLG-G
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CL2N8-G
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BCR420UW6-7
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BCR421UW6-7
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BCR420UFD-7
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BCR421UFD-7
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