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Texas Instruments LP8501TMEEV
- Part No.:
- LP8501TMEEV
- Manufacturer:
- Texas Instruments
- Category:
- LED Driver Evaluation Boards
- Package:
- Datasheet:
-
LP8501TMEEV.pdf
- Description:
- EVAL BOARD FOR LP8501
- Quantity:
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- Shipping:
Inventory:4,422
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Product details
Overview
LP8501TMEEV 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 control, and three independent execution engines for autonomous lighting effects in mobile devices. It operates from 2.7 V to 5.5 V input and supports RGB keypad illumination, indicator lighting, and haptic feedback driving.
For engineers reviewing the LP8501TMEEV datasheet, LP8501TMEEV pinout, LP8501TMEEV application, or LP8501TMEEV equivalent, key selection considerations include its adaptive 1x/1.5x charge pump efficiency (up to 95%), DSBGA-25 package (2.26 mm × 2.26 mm), I²C-compatible interface, GPO/INT/TRIG signal support, and built-in LED test functionality.
Technical Context
The LP8501TMEEV integrates a pre-regulated switched-capacitor charge pump with automatic gain selection (1x or 1.5x) based on real-time LED forward voltage headroom monitoring across D1–D9 outputs. Its internal 32 kHz oscillator or external clock input drives three independent program execution engines managing up to 96 instructions stored in SRAM.
Each of the nine high-side current sources features 8-bit programmable full-scale current (0–25.5 mA) and 12-bit PWM dimming at 312 Hz, with ±4% output current accuracy and ≤1% matching between channels. Power-save mode reduces supply current to 10 µA (typ.) when outputs are inactive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 5.5 V - supports full Li-ion battery range without external regulation |
| Max Output Current per Channel | 25.5 mA - sufficient to drive standard RGB LEDs at full brightness |
| PWM Resolution & Frequency | 12-bit / 312 Hz - enables smooth, flicker-free dimming with >4000 intensity steps |
| Charge Pump Efficiency | Up to 95% - achieved via adaptive 1x/1.5x gain selection and low ROUT (3.5 Ω typ.) |
| Supply Current (Power Save) | 10 µA (typ.) - enables ultra-low quiescent power during display off/idle states |
| Output Current Accuracy | ±4% - ensures consistent brightness across all 9 channels at 17.5 mA setting |
| Package | DSBGA-25 (YFQ0025), 2.26 mm × 2.26 mm × 0.60 mm - ultra-compact footprint for space-constrained mobile PCBs |
Pinout & Package
LP8501TMEEV uses a 25-bump thin DSBGA package (package number YFQ0025) with 0.4 mm pitch, optimized for minimal board area (<18 mm² solution size). Pin functions are validated per TI SNVS548D Rev. August 2013.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1–A2, B1–B2, C1–C2, D1–D2, E1 | Current source outputs D1–D9 | High-side drivers supporting independent or grouped PWM control; each configurable up to 25.5 mA |
| A3 | VOUT | Charge pump regulated output - supplies D1–D6 when VDD1_6 is connected; voltage auto-adjusts between 1x/1.5x modes |
| B3, C3, C5, D5, E5 | VDD1_6, VDD7_9, VDD, GND, SCL | Power rails and I²C clock - VDD1_6 powers D1–D6; VDD7_9 powers D7–D9; dual-power-domain design improves efficiency |
| C4, E3–E4, D3–D4 | EN, TRIG, SDA, INT, CLK | Control interface - EN enables device; TRIG starts programs without I²C; INT signals completion/error; CLK accepts 32.7 kHz external timing |
| E2 | GPO | General-purpose open-drain output - usable as GPIO or control signal for companion ICs (e.g., backlight boost converter enable) |
Key Features
| Feature | Design Value |
|---|---|
| Three independent program engines | Enables concurrent execution of keypad lighting, fun lights, and status indicators without MCU intervention |
| Adaptive 1x/1.5x charge pump | Maintains ≥90% efficiency across 2.7–5.5 V input by dynamically selecting gain based on LED VF headroom |
| Built-in LED test circuitry | Performs open/short detection and forward voltage measurement via serial interface - eliminates need for external test hardware |
| Flexible grouping of 9 outputs | Allows D1–D9 to be partitioned into up to three independent PWM-controlled banks (e.g., RGB groups or function-based clusters) |
| Small total solution size | Requires only four ceramic capacitors (CIN, COUT, C1, C2); occupies <18 mm² PCB area including passives |
Applications
| RGB Keypad Lighting | Indicator Lights |
|---|---|
Use Scenario: Illuminating alphanumeric keys on smartphone or PDA keypads with dynamic color transitions. IC Role / Device Role / Timing Role: LP8501TMEEV acts as autonomous RGB LED driver, executing preloaded color-fade sequences using internal program memory and 12-bit PWM. Use Value: Eliminates MCU overhead for lighting effects while maintaining precise color balance via 1% current matching across R/G/B channels. | Use Scenario: Driving status LEDs for battery level, charging state, or notification alerts in portable electronics. IC Role / Device Role / Timing Role: LP8501TMEEV serves as programmable current source with fade-in/fade-out group control for soft visual feedback. Use Value: Reduces bill-of-materials count by integrating timing, current regulation, and sequencing - no external microcontroller or discrete FETs required. |
| Haptic Feedback Driver | Sub-display Backlighting |
Use Scenario: Generating tactile pulses via vibrating motor or piezo element synchronized with LED flashes. IC Role / Device Role / Timing Role: LP8501TMEEV uses GPO output to trigger motor driver ICs while coordinating LED flash timing via TRIG and INT signals. Use Value: Enables tightly coupled electro-mechanical feedback with sub-millisecond synchronization - critical for responsive user interface design. | Use Scenario: Providing uniform backlight for small OLED or LCD sub-displays in foldable phones or wearables. IC Role / Device Role / Timing Role: LP8501TMEEV delivers stable current to 3–6 parallel LEDs using VDD7_9 rail and grouped PWM control. Use Value: Achieves <±2% brightness uniformity across sub-display due to matched current sources and low-tempco VREF. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC59284RTJR | 16-channel constant-current sink driver; no integrated charge pump; requires external VLED supply | Designed for LED signage and industrial displays - lacks autonomous program execution and GPO/INT features | Choose when higher channel count and sink topology are needed, but accept added external power design complexity |
| IS31FL3728-QFLS4-TR | 28-channel matrix LED driver with built-in oscillator; supports audio-reactive patterns; no adaptive charge pump | Targeted at consumer lighting and decorative effects - includes FFT engine but lacks TRIG-initiated standalone operation | Prefer for rich multimedia lighting where audio sync matters more than battery-voltage adaptability |
Compared with TLC59284RTJR and IS31FL3728-QFLS4-TR, the LP8501TMEEV uniquely combines autonomous multi-engine programming, adaptive charge pump efficiency over full Li-ion range, and compact DSBGA packaging - making it optimal for space- and power-constrained mobile UI lighting.
Availability
LP8501TMEEV is available at Aetrix Electronics and suitable for RGB keypad lighting, indicator lights, and haptic feedback driver applications requiring stable component supply and long-term production continuity.
Supply support for LP8501TMEEV 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 LP8501TMEEV belongs to TI's Lighting Management Unit (LMU) product line, designed specifically for autonomous, low-power LED lighting control in battery-powered mobile devices with minimal MCU involvement.
FAQ
What is the maximum output current per channel for the LP8501TMEEV?
The LP8501TMEEV supports a maximum full-scale output current of 25.5 mA per channel (D1–D9), set via an 8-bit register. This value is confirmed in the Electrical Characteristics table of TI SNVS548D Rev. August 2013, with typical operation at 17.5 mA achieving ±4% accuracy and ≤1% matching across all outputs. The LP8501TMEEV maintains this current capability across its full 2.7 V to 5.5 V input range using adaptive charge pump regulation.
Does the LP8501TMEEV require an external clock source to operate?
No - the LP8501TMEEV includes an internal 32 kHz oscillator and can operate autonomously without an external clock. However, it also accepts an external 32.7 kHz square-wave clock on the CLK pin for improved timing accuracy or synchronization with system clocks. When CLK is unused, it must be tied to GND per TI SNVS548D recommendations. The LP8501TMEEV uses this clock for program execution timing and PWM generation, whether sourced internally or externally.
How does the adaptive charge pump in the LP8501TMEEV improve efficiency?
The LP8501TMEEV's adaptive charge pump monitors LED forward voltage headroom across D1–D6 and automatically selects between 1x (bypass) and 1.5x (boost) gain modes to maintain regulation while minimizing losses. At higher input voltages (e.g., >4.0 V), it operates in 1x mode with ~95% efficiency; at lower voltages (e.g., 2.7–3.3 V), it switches to 1.5x mode to sustain 4.5 V output. This behavior is documented in Figures 5–8 and Section "Charge Pump Operational Description" of the LP8501TMEEV datasheet SNVS548D.
Can the LP8501TMEEV drive red, green, and blue LEDs independently with different current settings?
Yes - the LP8501TMEEV allows independent 8-bit current programming for each of its nine outputs (D1–D9), enabling distinct current levels for R, G, and B LEDs within an RGB cluster. For example, D1/D2/D3 may be assigned to red LEDs at 15 mA, D4/D5/D6 to green at 18 mA, and D7/D8/D9 to blue at 20 mA - all while maintaining ≤1% matching within each group. This per-channel configurability is implemented via the Current Control Registers (addresses 00h–08h) defined in the LP8501TMEEV register map.
What is the purpose of the TRIG pin on the LP8501TMEEV?
The TRIG pin on the LP8501TMEEV provides hardware-initiated program execution: asserting TRIG (active-high, open-drain with pull-up) starts one of the three internal program engines without requiring an I²C write transaction. This enables ultra-low-latency lighting activation - for example, triggering keypad illumination instantly upon button press. Per SNVS548D, TRIG is labeled as I/OD (input/open-drain), and if unused, must be connected to GND. The LP8501TMEEV interprets a rising edge on TRIG as a command to launch the default or selected program sequence.
LP8501TMEEV Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Packaging:
- Box
- Product Status:
- Obsolete
- Current - Output / Channel:
- 25.5mA
- Outputs and Type:
- 9 Non-Isolated Outputs
- Voltage - Output:
- -
- Features:
- -
- Voltage - Input:
- 2.7V ~ 5.5V
- Contents:
- Board(s)
- Utilized IC / Part:
- LP8501
LP8501TMEEV FAQ
1.How can I place an order for LP8501TMEEV through Aetrix?
Please submit a Request for Quotation (RFQ) for LP8501TMEEV 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 LP8501TMEEV reliable?
The price and inventory of LP8501TMEEV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP8501TMEEV is usually 5 days.
3.What payment methods are accepted for LP8501TMEEV?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP8501TMEEV transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP8501TMEEV?
LP8501TMEEV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP8501TMEEV 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 LP8501TMEEV?
For technical support, including LP8501TMEEV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP8501TMEEV requirements.
6.How does Aetrix verify that LP8501TMEEV is sourced from the original manufacturer or authorized distributors?
All LP8501TMEEV 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 LP8501TMEEV meets industry standards.
7.What is the process for return or replacement of LP8501TMEEV?
All LP8501TMEEV units undergo pre-shipment inspection (PSI). If there is an issue with LP8501TMEEV, 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 LP8501TMEEV part is unused and in its original packaging.
Return procedure for LP8501TMEEV:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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