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Texas Instruments LP8501TME/NOPB
- Part No.:
- LP8501TME/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 25-WFBGA
- Datasheet:
-
LP8501TME/NOPB.pdf
- Description:
- IC LED DRVR RGLTR PWM 25USMD
- Quantity:
- Payment:
- Shipping:
Inventory:250
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Product details
Overview
LP8501TME/NOPB from Texas Instruments is a 9-output, high-side LED driver IC with integrated charge pump, programmable current sources (25.5 mA full-scale), 12-bit PWM dimming control, and three independent program execution engines for autonomous lighting effects in mobile devices. It operates from 2.7V to 5.5V input and supports RGB keypad illumination, indicator lighting, and haptic feedback driving.
For engineers reviewing the LP8501TME/NOPB datasheet, LP8501TME/NOPB pinout, LP8501TME/NOPB application, or LP8501TME/NOPB equivalent, key selection considerations include adaptive 1x/1.5x charge pump efficiency, GPO/INT/TRIG interface flexibility, DSBGA-25 package constraints, and I²C-compatible control for embedded lighting sequencing without MCU intervention.
Technical Context
The LP8501TME/NOPB integrates a pre-regulated switched-capacitor charge pump with automatic 1x/1.5x gain selection based on real-time LED forward voltage headroom monitoring across D1–D9 outputs. Its internal 32 kHz oscillator or external CLK input synchronizes three independent SRAM-based program engines managing up to 96 instructions for lighting sequences.
Each of the nine high-side current sources features 8-bit programmable full-scale current (0–25.5 mA) and 12-bit PWM resolution at 312 Hz, with ±4% output accuracy and ≤1% matching at 17.5 mA. The device enters power-save mode automatically when outputs are inactive, reducing supply current to 10 µA (typ.) while retaining register state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output count | 9 independent high-side current sources (D1–D9), configurable into up to three groups for synchronized PWM/fade control |
| Max source current | 25.5 mA per channel - sufficient to drive standard RGB LEDs or indicator LEDs at full brightness from Li-ion battery range |
| PWM resolution | 12-bit (4096 steps) - enables smooth, flicker-free dimming down to 0.024% duty cycle for precise luminance control |
| Charge pump modes | Auto-select 1x (bypass) or 1.5x (boost to ~4.5 V) - maintains >95% LED drive efficiency across 2.7–5.5 V input range |
| Supply current (PSM) | 10 µA typical in power-save mode - enables ultra-low quiescent consumption during display off or standby states |
| I²C interface | 400 kHz compliant, 2-wire SDA/SCL - supports standard microcontroller integration without custom protocol stacks |
| Package | DSBGA-25 (2.26 mm × 2.26 mm × 0.60 mm, 0.4 mm pitch) - enables compact layout in space-constrained mobile PCBs |
Pinout & Package
LP8501TME/NOPB uses a 25-bump thin DSBGA package (YFQ0025), 2.26 mm × 2.26 mm × 0.60 mm body size, 0.4 mm pitch. Pin mapping is validated per TI SNVS548D Rev. August 2013.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 (D1) | Current source output 1 | High-side constant-current sink for LED anode connection; programmable 0–25.5 mA, 12-bit PWM modulated |
| A2 (D2) | Current source output 2 | Independent high-side driver identical to D1; supports individual or grouped control with D1–D6 or D7–D9 |
| A3 (VOUT) | Charge pump output | Regulated 1x or 1.5x boosted voltage rail supplying D1–D6 drivers; monitored for automatic gain switching |
| A4 (C2−), A5 (C2+) | Flying capacitor terminals | Connect external 0.47 µF ceramic capacitor (C2) for 1.5x charge pump operation; low-ESR MLCC required |
| B1 (D3)–E1 (D9) | Current source outputs 3–9 | Eight additional high-side drivers; D7–D9 powered by separate VDD7_9 rail - optimized for red LED forward voltage |
| C3 (VDD7_9) | Power rail for D7–D9 | Allows direct battery connection to D7–D9, bypassing charge pump - improves efficiency for low-VF red LEDs |
| C4 (EN) | Enable input | Hardware enable pin; logic high activates internal circuitry; low forces standby mode with 1 µA typical current |
| D3 (INT) | Open-drain interrupt output | Signals microcontroller on program completion, error detection (open/short LED), or trigger event; requires pull-up |
| E2 (GPO) | General-purpose output | Configurable digital output (push-pull or open-drain) for auxiliary control - e.g., enabling external LED boost stage |
| E4 (SDA), E5 (SCL) | I²C serial interface | Standard 2-wire bus interface; supports read/write to 32 registers including current/PWM/grouping configuration |
Key Features
| Feature | Design Value |
|---|---|
| Three independent program engines | Each executes user-defined lighting sequences stored in 96-instruction SRAM - enables concurrent keypad, indicator, and fun-light effects |
| Adaptive charge pump | Automatically switches between 1x (bypass) and 1.5x (boost) modes based on real-time VF headroom - sustains >90% efficiency across full battery discharge |
| Built-in LED test function | Measures open-circuit, short-circuit, and forward voltage per channel via serial interface - eliminates need for external test hardware |
| Flexible grouping & fade control | All 9 outputs assignable to three groups; each group supports independent PWM, fade-in/fade-out timing - simplifies UI lighting animation design |
| Low-power architecture | 10 µA typical idle current in power-save mode; thermal shutdown at 150°C (typ.) - ensures reliability in thermally constrained handheld enclosures |
Applications
| RGB Keypad Illumination | Indicator Light Sequencing |
|---|---|
|
Use Scenario: Backlighting alphanumeric keypads in smartphones and feature phones with dynamic color transitions. IC Role / Device Role / Timing Role: High-side current source driver with per-key 12-bit PWM control and group-based fade timing. Use Value: Enables smooth color cycling (e.g., breathing, pulse) using internal program engines - no host MCU overhead required. |
Use Scenario: Status indication for charging, notifications, and system alerts using discrete LEDs. IC Role / Device Role / Timing Role: Autonomous sequencer driving 3–9 LEDs with programmable on/off duration and intensity ramping. Use Value: Reduces firmware complexity by offloading LED timing to LP8501TME/NOPB's SRAM-based engines - improves system responsiveness. |
| Mobile Sub-display Backlight | Haptic Feedback Driver |
|
Use Scenario: Powering small OLED or segment LCD sub-displays requiring uniform, dimmable backlight. IC Role / Device Role / Timing Role: Constant-current source with matched output accuracy (≤1%) across all 9 channels. Use Value: Ensures consistent brightness across display segments - critical for readability under varying ambient light. |
Use Scenario: Driving piezoelectric or vibration motor elements synchronized with UI events. IC Role / Device Role / Timing Role: Programmable current source with fast turn-on (<100 µs) and precise pulse-width control. Use Value: Delivers repeatable tactile feedback intensity and duration - enhances user experience without CPU polling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC59284DBQR | 16-channel constant-current sink (not source); no integrated charge pump; requires external VLED supply | Designed for common-anode LED arrays; lacks autonomous program engines and GPO/INT functionality | Select when driving high-channel-count displays with external boost and MCU-managed timing. |
| MAX16826ATL+ | 4-channel high-side driver; analog/digital dimming only; no SRAM or programmable engines | Targeted at automotive interior lighting; higher voltage rating (40 V), no I²C interface | Select for ruggedized, high-voltage LED systems where autonomous sequencing is not required. |
Compared with TLC59284DBQR and MAX16826ATL+, the LP8501TME/NOPB uniquely combines 9-channel high-side sourcing, adaptive charge pump, and embedded lighting engines - making it optimal for space-constrained mobile UI lighting where MCU offload and battery efficiency are critical.
Availability
LP8501TME/NOPB is available at Aetrix Electronics and suitable for RGB keypad illumination, indicator light sequencing, and haptic feedback driving requiring stable component supply and long-term industrial availability.
Supply support for LP8501TME/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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The LP8501TME/NOPB belongs to TI's Lighting Management Unit (LMU) product line, designed specifically for autonomous, low-power LED lighting control in portable consumer devices with minimal host processor involvement.
FAQ
What is the maximum output current per channel for the LP8501TME/NOPB?
The LP8501TME/NOPB provides a maximum full-scale source current of 25.5 mA per channel (D1–D9), set via an 8-bit current register. This value is confirmed in the Electrical Characteristics table of the SNVS548D datasheet under "IMAX" with conditions specified for outputs D1 to D9. The LP8501TME/NOPB maintains ±4% accuracy and ≤1% matching at 17.5 mA load, ensuring consistent brightness across all channels.
Does the LP8501TME/NOPB support autonomous lighting sequences without MCU intervention?
Yes, the LP8501TME/NOPB contains three independent program execution engines with 96 instructions of on-chip SRAM memory. These engines execute user-defined lighting programs - such as breathing, pulsing, or color transitions - without requiring continuous host MCU control. The LP8501TME/NOPB can be triggered autonomously via the TRIG pin or I²C command, making it ideal for low-power UI lighting.
How does the adaptive charge pump in the LP8501TME/NOPB improve efficiency?
The LP8501TME/NOPB's adaptive charge pump monitors LED forward voltage headroom across D1–D6 and automatically selects 1x (bypass) or 1.5x (boost) mode to maintain regulation. At higher battery voltages (e.g., ≥3.6 V), it uses 1x mode to minimize losses; at lower voltages (<3.3 V), it engages 1.5x mode to sustain 4.5 V output. This achieves up to 95% LED drive efficiency across the full 2.7–5.5 V input range, as verified in Figure 5 of the SNVS548D datasheet.
What package type and dimensions does the LP8501TME/NOPB use?
The LP8501TME/NOPB is housed in a 25-bump thin DSBGA package (TI package code YFQ0025), measuring 2.26 mm × 2.26 mm × 0.60 mm with 0.4 mm ball pitch. This ultra-compact footprint supports high-density mobile PCB layouts. The pinout is fully documented in the "Connection Diagrams" section (Figure 1 and 2) and "PIN DESCRIPTIONS" table of the SNVS548D datasheet.
Can the LP8501TME/NOPB drive red LEDs efficiently without using the charge pump?
Yes. The LP8501TME/NOPB provides separate power rails: VDD1_6 supplies D1–D6, while VDD7_9 supplies D7–D9. Since red LEDs typically have low forward voltage (~2.0–2.2 V), D7–D9 can be powered directly from the battery (via VDD7_9) without engaging the charge pump - improving overall system efficiency. This configuration is explicitly supported in the Functional Overview and Charge Pump Operational Description sections of SNVS548D.
LP8501TME/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:
- Switched Capacitor (Charge Pump)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 9
- Voltage - Supply (Min):
- 2.7V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 4.5V
- Current - Output / Channel:
- 25.5mA
- Frequency:
- 1.25MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -30°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 25-uSMD
LP8501TME/NOPB FAQ
1.How can I place an order for LP8501TME/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP8501TME/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 LP8501TME/NOPB reliable?
The price and inventory of LP8501TME/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP8501TME/NOPB is usually 5 days.
3.What payment methods are accepted for LP8501TME/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP8501TME/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP8501TME/NOPB?
LP8501TME/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP8501TME/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 LP8501TME/NOPB?
For technical support, including LP8501TME/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP8501TME/NOPB requirements.
6.How does Aetrix verify that LP8501TME/NOPB is sourced from the original manufacturer or authorized distributors?
All LP8501TME/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 LP8501TME/NOPB meets industry standards.
7.What is the process for return or replacement of LP8501TME/NOPB?
All LP8501TME/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP8501TME/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 LP8501TME/NOPB part is unused and in its original packaging.
Return procedure for LP8501TME/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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