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Texas Instruments LM8502TMX/NOPB
- Part No.:
- LM8502TMX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 30-WFBGA, DSBGA
- Datasheet:
-
LM8502TMX/NOPB.pdf
- Description:
- IC LED DRIVER RGLTR 2.3A 30DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,334
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Product details
Overview
LM8502TMX/NOPB from Texas Instruments is an intelligent lighting management IC integrating a 1.2A dual high-side flash LED driver and ten programmable low-side current-sink LED drivers in a single 30-bump DSBGA package. It delivers 600 mA per flash channel (1.2A total), supports 4000:1 dimming via logarithmic 8-bit control, and includes ambient light sensing (ALS1/ALS2), thermal monitoring (LEDI/NTC), and two lighting engines with 48×16-bit SRAM for autonomous sequences - used in camera phone flash subsystems requiring synchronized RF power amplifier timing.
For engineers reviewing the LM8502TMX/NOPB datasheet, LM8502TMX/NOPB pinout, LM8502TMX/NOPB application, or LM8502TMX/NOPB equivalent, key selection considerations include flash/torch mode switching latency (20 µs), I²C fast-mode (400 kHz) and high-speed-mode (3.4 MHz) timing compliance, dual TX synchronization inputs for RF PA coordination, and configurable power sourcing (VOUT or external supply) per LED output.
Technical Context
The LM8502TMX/NOPB implements a fixed-frequency 2 MHz synchronous boost converter with internal NMOS/PMOS switches (SW pins A4/B4) and regulated 5 V output (OUT pins A3/B3), enabling efficient powering of up to 10 LEDs from 2.7–5.5 V input. Its dual high-side flash outputs (FLASH1/A1, FLASH2/A2) operate as independent 600 mA current sources with hardware STROBE enable and thermal scaleback triggered by NTC sensing on LEDI/NTC.
LED control is executed through three parallel mechanisms: individual I²C register writes (per-output 8-bit current + full-scale selection), group fader registers (three independent fade groups with 0–4 s ramp time), and lighting engines (SRAM-based sequencers supporting trigger-driven execution via TRIG/F3). ALS1/D3 and ALS2/D10 inputs feed ambient light data for dynamic backlight control when combined with PWM/ENVM/TX2 (D4).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Flash Output Current | 1.2A total (600 mA per channel), enabling dual-LED flash or single-LED high-intensity illumination |
| Low-Side LED Outputs | 10 channels (D1–D10), each programmable up to 25.5 mA with ±5% accuracy at 17.5 mA setting |
| Dimming Ratio | Up to 4000:1 using logarithmic 8-bit control, matching human eye perception without external PWM |
| I²C Interface Speed | Supports Fast Mode (400 kHz) and High-Speed Mode (3.4 MHz), reducing MCU bus overhead during lighting updates |
| Boost Converter | 2 MHz fixed-frequency synchronous topology with 5 V ±2% output accuracy and 1.7–2.3 A switch current limit |
| Ambient Light Sensing | Dual inputs (ALS1/D3, ALS2/D10) enabling closed-loop dynamic backlight control in portable displays |
| Thermal Protection | LEDI/NTC pin configures threshold detector for flash LED temperature; triggers torch mode or shutdown at trip point |
Pinout & Package
LM8502TMX/NOPB uses a 30-bump, 2.42 mm × 2.77 mm × 0.6 mm, 0.4 mm pitch DSBGA package (TI package code YFQ0030SQA), optimized for ultra-small footprint (<32 mm² solution area) in space-constrained mobile designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FLASH1 (A1) | High-side current source output | Sources up to 600 mA for flash LED or vibra motor; supports hardware STROBE-triggered pulse |
| FLASH2 (A2) | High-side current source output | Independent 600 mA channel; pairs with FLASH1 for dual-LED flash or haptic feedback |
| STROBE (C4) | Hardware flash enable input | Active-high direct control for flash pulse initiation; bypasses I²C latency for critical timing |
| TX1/TORCH (D5) | RF PA sync / torch enable | Hardware-triggered transition to torch mode (180 mA) upon RF power amplifier event |
| PWM/ENVM/TX2 (D4) | Multi-function input | Configurable as PWM input (dynamic backlight), voltage-mode enable, or second RF sync input |
| LEDI/NTC (C3) | Indicator LED drive / NTC input | Four-level indicator current (2.2–8.8 mA) or thermistor interface for flash thermal safety |
| ALS1 (D3), ALS2/D10 | Ambient light sensor inputs | Enable automatic brightness adjustment in displays and UI lighting based on environment |
| TRIG (F3) | Lighting engine trigger | External start/stop signal for SRAM-based lighting sequences; supports bidirectional handshake |
| SCL/SDA (F4/F5) | I²C interface | Fully compliant with Fast and High-Speed I²C protocols; supports multi-master arbitration |
| INT (E3) | Interrupt output | Asserts on lighting engine completion, ALS zone change, or NTC thermal event for MCU wake-up |
Key Features
| Feature | Design Value |
|---|---|
| Dual high-side flash architecture | Enables simultaneous 600 mA sourcing on FLASH1/A1 and FLASH2/A2 for balanced dual-LED flash or haptic actuation |
| 10-channel low-side LED control | Each output independently programmable via I²C with 8-bit resolution and selectable linear/logarithmic dimming curves |
| Two lighting engines with SRAM | 48 × 16-bit memory enables user-defined, autonomous lighting sequences without MCU intervention |
| Hardware synchronization inputs | Dual TX pins (D4/D5) allow precise flash timing alignment with RF power amplifier pulses to avoid system current surges |
| Ultra-low standby current | 0.3 µA shutdown current extends battery life in always-on mobile devices with infrequent flash usage |
| Flexible LED power sourcing | Each low-side output (D1–D10) can be powered from boost output (VOUT) or external supply - decouples LED voltage requirements from input rail |
Applications
| Camera Phone Flash Control | Dynamic Backlight Adjustment |
|---|---|
Use Scenario: Smartphone rear camera module requiring high-intensity, thermally managed flash illumination synchronized with RF transmission. IC Role / Device Role / Timing Role: LM8502TMX/NOPB acts as flash controller, providing 1.2A dual-channel current sourcing, thermal scaleback, and hardware STROBE/TX-triggered sequencing. Use Value: Eliminates need for discrete flash FETs and thermal sensors; 20 µs flash-to-torch settling ensures rapid response to RF PA events without overcurrent stress. |
Use Scenario: Portable tablet display backlight dimming based on ambient light conditions to optimize power and visual comfort. IC Role / Device Role / Timing Role: LM8502TMX/NOPB serves as ambient-light-responsive LED driver, using ALS1/D3 and PWM/ENVM/TX2 (D4) to modulate backlight intensity. Use Value: Achieves seamless 4000:1 dimming range with logarithmic curve - perceptually linear brightness steps without MCU real-time computation. |
| Haptic Feedback Actuation | Autonomous UI Lighting Sequences |
Use Scenario: Mobile device tactile feedback system using vibration motors instead of flash LEDs during silent mode or notifications. IC Role / Device Role / Timing Role: LM8502TMX/NOPB repurposes FLASH1/A1 and FLASH2/A2 as high-side drivers for vibra motor coils, controlled via I²C or lighting engines. Use Value: Reuses flash driver circuitry for haptics - no additional driver IC required; supports programmable motor intensity and timing profiles. |
Use Scenario: Smartwatch or wearable device with animated status indicators requiring persistent, low-power lighting patterns. IC Role / Device Role / Timing Role: LM8502TMX/NOPB executes preloaded lighting sequences from its 48×16-bit SRAM engines, triggered by TRIG/F3 or INT/E3 events. Use Value: Offloads animation logic from host MCU; maintains complex lighting behavior during MCU sleep with <0.3 µA standby current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar intelligent LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3530TMX/NOPB | Single 30-channel LED driver with ALS but no flash capability; lacks high-side flash outputs and lighting engines | Targeted at general backlight control only - cannot replace flash/haptic functions of LM8502TMX/NOPB | Select when only ambient-adaptive backlighting is needed and flash/haptics are handled separately |
| TPS61165DRVR | Single 40-V, 1.2-A boost LED driver with analog/digital dimming; no I²C, no ALS, no lighting engines, no haptic support | Designed for high-voltage LED strings (e.g., automotive interior lighting), not multi-output mobile lighting management | Choose for high-brightness, non-intelligent LED string driving where system-level MCU handles sequencing |
Compared with LM3530TMX/NOPB and TPS61165DRVR, the LM8502TMX/NOPB uniquely integrates flash, haptics, ALS, and autonomous lighting engines in one die - eliminating four discrete ICs in camera phone designs while enabling synchronized RF-aware illumination control.
Availability
LM8502TMX/NOPB is available at Aetrix Electronics and suitable for camera phone flash modules, portable display backlight systems, haptic feedback subsystems, and wearable UI lighting applications requiring stable component supply and long-term production continuity.
Supply support for LM8502TMX/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 digital signal processing technologies, with decades of expertise in power management and lighting control ICs.
The LM8502TMX/NOPB belongs to TI's Intelligent Lighting Management Unit product line, designed specifically for mobile and portable devices requiring integrated flash, haptic, ambient sensing, and autonomous lighting sequencing in minimal PCB area.
FAQ
What is the maximum continuous current per flash output on the LM8502TMX/NOPB?
The LM8502TMX/NOPB supports up to 600 mA per flash output (FLASH1/A1 and FLASH2/A2), with a combined maximum of 1.2A. This is verified across the full operating temperature range (−30°C to +85°C) and includes ±8% current accuracy at the 600 mA setting per channel, as specified in the Electrical Characteristics table of the SNVS592D datasheet.
Does the LM8502TMX/NOPB support hardware-triggered flash activation independent of I²C commands?
Yes, the LM8502TMX/NOPB provides dedicated hardware flash enable via the STROBE (C4) pin - an active-high input that directly initiates the flash pulse without MCU I²C intervention. This reduces latency to under 1 µs for critical timing applications such as RF power amplifier synchronization, and is explicitly documented in the Pin Descriptions and Functional Description sections.
Can the LM8502TMX/NOPB drive haptic motors, and how is this configured?
Yes, the LM8502TMX/NOPB can drive haptic motors using its FLASH1 (A1) and FLASH2 (A2) pins as high-side current sources. Configuration is achieved by disabling flash mode and programming the outputs via I²C registers or lighting engines - confirmed in the "VIBRAP/VIBRAN" pin description and Applications section, which lists "Haptic Feedback Motor Driver" as a primary use case.
How does the LM8502TMX/NOPB achieve 4000:1 dimming ratio, and what is required to realize it?
The LM8502TMX/NOPB achieves up to 4000:1 dimming by combining 8-bit logarithmic current control with selectable full-scale current settings (down to 3 mA). At the lowest full-scale (3 mA) and first logarithmic step (6.25 µA), the ratio reaches ~4080:1. This requires enabling logarithmic mode (LED control register bit 5 = 1) and configuring appropriate full-scale bits - detailed in the LED DRIVER section of the datasheet.
What thermal protection mechanisms are implemented in the LM8502TMX/NOPB for flash LED operation?
The LM8502TMX/NOPB implements flash LED thermal protection via the LEDI/NTC (C3) pin, configurable as an NTC thermistor input. When temperature exceeds the programmed threshold (1 V ±5%), the device automatically scales back flash current to torch level or shuts down the flash - a safety feature explicitly described in the Features list, Pin Descriptions, and Functional Description sections of the SNVS592D datasheet.
LM8502TMX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 30-WFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 12
- Voltage - Supply (Min):
- 2.7V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- -
- Current - Output / Channel:
- 2.3A (Switch)
- Frequency:
- 2MHz
- Dimming:
- -
- Applications:
- Backlight, Camera Flash
- Operating Temperature:
- -30°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 30-DSBGA
LM8502TMX/NOPB FAQ
1.How can I place an order for LM8502TMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM8502TMX/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 LM8502TMX/NOPB reliable?
The price and inventory of LM8502TMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM8502TMX/NOPB is usually 5 days.
3.What payment methods are accepted for LM8502TMX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM8502TMX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM8502TMX/NOPB?
LM8502TMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM8502TMX/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 LM8502TMX/NOPB?
For technical support, including LM8502TMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM8502TMX/NOPB requirements.
6.How does Aetrix verify that LM8502TMX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM8502TMX/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 LM8502TMX/NOPB meets industry standards.
7.What is the process for return or replacement of LM8502TMX/NOPB?
All LM8502TMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM8502TMX/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 LM8502TMX/NOPB part is unused and in its original packaging.
Return procedure for LM8502TMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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