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Texas Instruments LM8502TME/NOPB
- Part No.:
- LM8502TME/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 30-WFBGA, DSBGA
- Datasheet:
-
LM8502TME/NOPB.pdf
- Description:
- IC LED DRIVER RGLTR 2.3A 30DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:250
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Product details
Overview
LM8502TME/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, all controlled via I²C interface. It features a 2 MHz synchronous boost converter (VOUT = 5 V ±2%), ambient light sensing (ALS1/ALS2), thermal monitoring (LEDI/NTC), and two lighting engines with 48 × 16-bit SRAM for user-defined sequences - deployed in camera phone flash subsystems requiring precise multi-LED timing and thermal safety.
For engineers reviewing the LM8502TME/NOPB datasheet, LM8502TME/NOPB pinout, LM8502TME/NOPB application, or LM8502TME/NOPB equivalent, key selection criteria include flash current accuracy (±8% at 1.2 A), 4000:1 dimming ratio with logarithmic control, 30-bump DSBGA package (2.42 × 2.77 mm), STROBE-triggered hardware flash enable, and dual TX synchronization for RF power amplifier coordination.
Technical Context
The LM8502TME/NOPB implements a current-mode PWM synchronous boost converter with internal NMOS/PMOS switches (SW pins A4/B4) and regulated 5 V output (OUT pins A3/B3). Its flash subsystem uses two independent high-side current sources (FLASH1/A1, FLASH2/A2) supporting either dual 600 mA LEDs or single 1.2 A LED, with hardware STROBE activation and thermal scaleback via LEDI/NTC.
Ten low-side LED outputs (D1–D10) support per-channel 8-bit current programming (0–25.5 mA), group fader control across three independent fade groups, and lighting engine execution with SRAM-based sequence storage. ALS1/D3 and D10/ALS2 provide dual ambient light sensing inputs, while PWM/ENVM/TX2 (D4) and TX1/TORCH (D5) enable dynamic backlight control and RF-coordinated torch mode transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Flash Output Current | 1.2 A total (600 mA per channel), ±8% accuracy - enables reliable dual-LED flash without external current sense resistors |
| Low-Side LED Sink Range | 0–25.5 mA per channel, 8-bit linear/logarithmic control - supports 4000:1 dimming for perceptually uniform brightness steps |
| Boost Converter Output | 5.0 V ±2%, 2 MHz fixed-frequency operation - delivers stable rail for LED strings with minimal external components (CIN/COUT = 10 µF) |
| Ambient Light Sensing | Dual inputs (ALS1/D3, D10/ALS2) - allows differential ambient compensation for display backlight or UI lighting adaptation |
| Thermal Protection | LEDI/NTC pin supports NTC thermistor interface with programmable trip threshold (1 V ±5%) - triggers flash current scaleback or shutdown to prevent LED overheating |
| I²C Interface | Fast Mode (400 kHz) and High-Speed Mode (3.4 MHz) compatible - enables rapid register updates for lighting engine sequencing and real-time brightness adjustments |
| Package | 30-bump DSBGA (2.42 × 2.77 × 0.6 mm, 0.4 mm pitch) - ultra-compact footprint (<32 mm² solution area) for space-constrained mobile camera modules |
Pinout & Package
LM8502TME/NOPB uses a 30-bump, 0.4 mm pitch DSBGA package (package code YFQ0030SQA), measuring 2.42 mm × 2.77 mm × 0.6 mm. Pin assignments are validated per TI SNVS592D Rev F (Feb 2013).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FLASH1 (A1) | High-side current source output | Sources up to 600 mA for flash LED or haptic motor - configurable as VIBRAP in vibra applications |
| FLASH2 (A2) | High-side current source output | Sources up to 600 mA for second flash LED or haptic motor - configurable as VIBRAN |
| STROBE (C4) | Hardware flash enable input | Active-high direct trigger for flash pulse - bypasses I²C latency for instantaneous illumination onset |
| TX1/TORCH (D5) | RF sync / torch enable input | Hardware event input that forces flash into torch mode (180 mA) during RF transmission bursts |
| PWM/ENVM/TX2 (D4) | Multi-function input | Selectable as PWM input (dynamic backlight), voltage-mode enable, or RF sync input - requires register configuration |
| LEDI/NTC (C3) | Configurable analog terminal | Either 2.2–8.8 mA indicator LED driver or NTC thermistor comparator input for flash thermal management |
| D1–D10 (F1, F2, E1, E2, D1, D2, C1, C2, B1, B2) | Low-side current sink outputs | Individually programmable 0–25.5 mA sinks - each powered from VOUT or external supply per LED control register |
| ALS1 (D3), D10/ALS2 (B2) | Ambient light sensor inputs | Dedicated photodiode bias and ADC inputs - enable closed-loop ambient-adaptive lighting without MCU intervention |
| SCL (F4), SDA (F5) | I²C interface | Fast/High-Speed Mode compatible bus - supports daisy-chaining and interrupt-driven status reporting via INT (E3) |
| CLK (E4) | External clock input | 32.7 kHz square wave input enabling ultra-low-power idle mode - reduces standby current to 0.3 µA |
Key Features
| Feature | Design Value |
|---|---|
| Dual high-side flash driver with thermal scaleback | Prevents LED damage by reducing flash current when NTC threshold (1 V ±5%) is exceeded - critical for sustained burst operation |
| Two lighting engines with 48 × 16-bit SRAM | Enables autonomous, MCU-free lighting sequences (e.g., breathing effects, notification patterns) - eliminates host processor overhead |
| Group fader control (3 independent groups) | Single-register write fades multiple LEDs simultaneously - reduces I²C traffic by >70% vs. per-LED register writes |
| Dynamic backlight control via PWM input | PWM/ENVM/TX2 pin accepts external PWM signal to modulate LED brightness in real time - supports adaptive display dimming |
| Ultra-low standby current (0.3 µA) | Achieved via CLK-gated power-save mode - extends battery life in always-on camera subsystems |
| Hardware torch/flash mode switching | TX1/TORCH and STROBE pins allow sub-20 µs transition between flash (1.2 A) and torch (180 mA) modes - meets RF coexistence requirements |
Applications
| Camera Flash Subsystem | Mobile UI Lighting |
|---|---|
Use Scenario: Dual-LED flash in smartphone rear cameras requiring synchronized illumination during image capture and video recording. IC Role / Device Role / Timing Role: LM8502TME/NOPB acts as primary flash controller - managing current sourcing, thermal derating, RF-sync timing, and STROBE-triggered pulse generation. Use Value: Enables 1.2 A flash output with ±8% current accuracy and <20 µs TX-triggered torch mode entry - meeting JEDEC JESD22-A108 reliability and 3GPP RF coexistence specs. |
Use Scenario: Status lighting for notifications, charging indicators, and ambient-adaptive UI elements on portable devices. IC Role / Device Role / Timing Role: LM8502TME/NOPB serves as programmable LED manager - driving 10 low-side channels with logarithmic dimming and ALS-compensated brightness. Use Value: Delivers 4000:1 dimming range and dual ALS inputs (ALS1/D3, D10/ALS2) - enabling seamless brightness transitions across 0.1–10,000 lux ambient conditions. |
| Haptic Feedback Driver | Portable Illumination System |
Use Scenario: Driving eccentric rotating mass (ERM) or linear resonant actuator (LRA) motors in smartphones and wearables. IC Role / Device Role / Timing Role: LM8502TME/NOPB repurposes FLASH1/A1 and FLASH2/A2 as high-side drivers - delivering controlled current pulses to vibra motors. Use Value: Leverages existing flash driver architecture (600 mA per channel, thermal monitoring) - eliminates need for separate haptic driver IC and reduces BOM count. |
Use Scenario: General illumination in handheld medical devices, barcode scanners, and industrial handhelds requiring compact, programmable LED control. IC Role / Device Role / Timing Role: LM8502TME/NOPB functions as integrated lighting engine - powering LEDs from VOUT or external supply, executing stored lighting sequences, and monitoring temperature. Use Value: Integrates boost converter, 10-channel sink drivers, lighting engines, and thermal sensing in <32 mm² - reducing PCB area by 40% vs. discrete solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar intelligent LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3530UMX/NOPB | 10-channel 30 mA low-side driver only; no flash capability, no boost converter, no lighting engines | Suitable for ambient-light-adjusted display backlight only - lacks flash/haptic functionality and autonomous sequencing | Select when only backlight dimming is required and system already provides regulated 5 V rail |
| TPS61165DRVR | Single 40 V, 1.2 A boost LED driver with analog/digital dimming - no I²C, no ALS, no multi-channel sink control | Targeted at high-voltage single-string LED applications (e.g., automotive interior lighting) - not suitable for multi-LED mobile flash | Select for high-efficiency single-string driving where I²C control and thermal sensing are unnecessary |
Compared with LM3530UMX/NOPB and TPS61165DRVR, the LM8502TME/NOPB uniquely integrates flash + general illumination + haptic + ALS + lighting engines in one DSBGA package - eliminating four discrete ICs and enabling coordinated, thermally safe multi-function lighting control.
Availability
LM8502TME/NOPB is available at Aetrix Electronics and suitable for camera flash subsystems, mobile UI lighting systems, haptic feedback implementations, and portable illumination requiring stable component supply and long-term lifecycle support.
Supply support for LM8502TME/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, designing and manufacturing analog and embedded processing chips for industrial, automotive, and personal electronics markets.
The LM8502TME/NOPB belongs to TI's Intelligent Lighting Management product line, engineered specifically for mobile camera flash and multi-LED UI systems requiring integrated power conversion, thermal safety, ambient adaptation, and autonomous lighting sequencing.
FAQ
What is the maximum flash current capability of the LM8502TME/NOPB?
The LM8502TME/NOPB supports a total flash current of 1.2 A, delivered across two high-side outputs (FLASH1 and FLASH2), each rated for up to 600 mA with ±8% accuracy at full scale. This enables simultaneous driving of dual flash LEDs or a single high-brightness LED in smartphone camera modules. The LM8502TME/NOPB also includes thermal scaleback logic triggered via the LEDI/NTC pin to maintain safe operating temperatures during extended flash bursts.
How does the LM8502TME/NOPB achieve 4000:1 dimming ratio?
The LM8502TME/NOPB achieves up to 4000:1 dimming through an 8-bit logarithmic current control scheme applied to its 10 low-side LED outputs. When configured with the maximum full-scale current setting (25.5 mA) and logarithmic response enabled, the smallest controllable current step is 6.25 µA - yielding a 25.5 mA / 6.25 µA = 4080:1 ratio. This perceptually linear dimming ensures smooth brightness transitions across ambient light conditions without visible stepping. The LM8502TME/NOPB implements this using internal 12-bit resolution with 8-bit user-accessible registers.
Can the LM8502TME/NOPB drive haptic motors, and how is it configured?
Yes, the LM8502TME/NOPB can drive haptic motors using its FLASH1 (A1) and FLASH2 (A2) pins, which are functionally identical to high-side current sources capable of sourcing up to 600 mA each. To configure for haptic use, the device must be programmed to disable flash mode and assign these outputs to vibra control via register settings. The LM8502TME/NOPB retains thermal monitoring and current regulation capabilities in haptic mode - ensuring safe motor actuation without external current sensing. No hardware changes are needed beyond firmware configuration.
What ambient light sensing interfaces does the LM8502TME/NOPB provide?
The LM8502TME/NOPB provides two dedicated ambient light sensing inputs: ALS1 (pin D3) and D10/ALS2 (pin B2). ALS1 is a primary input optimized for standard photodiode biasing, while D10/ALS2 shares functionality with LED output 10 - it operates as an ALS input only when LED control register bit LED10_EN is cleared. Both inputs feed an internal ADC and support automatic lighting adjustments via group fader registers. The LM8502TME/NOPB does not require external op-amps or ADCs for basic ALS functionality, reducing system component count.
Does the LM8502TME/NOPB require an external boost inductor, and what are the typical values?
Yes, the LM8502TME/NOPB requires an external boost inductor connected between the SW pins (A4/B4) and VIN (C5). Per the TI SNVS592D datasheet, a typical value is 2.2 µH (e.g., Coilcraft LPS3015–222MLB), selected to support 2 MHz switching frequency and deliver 5 V at up to 1 A output current. Inductor DCR must be ≤130 mΩ to meet efficiency targets, and saturation current rating should exceed 2.3 A (per ICL specification). The LM8502TME/NOPB integrates all control circuitry - no external compensation components are needed for stable operation.
LM8502TME/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
LM8502TME/NOPB FAQ
1.How can I place an order for LM8502TME/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM8502TME/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 LM8502TME/NOPB reliable?
The price and inventory of LM8502TME/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM8502TME/NOPB is usually 5 days.
3.What payment methods are accepted for LM8502TME/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM8502TME/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM8502TME/NOPB?
LM8502TME/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM8502TME/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 LM8502TME/NOPB?
For technical support, including LM8502TME/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM8502TME/NOPB requirements.
6.How does Aetrix verify that LM8502TME/NOPB is sourced from the original manufacturer or authorized distributors?
All LM8502TME/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 LM8502TME/NOPB meets industry standards.
7.What is the process for return or replacement of LM8502TME/NOPB?
All LM8502TME/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM8502TME/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 LM8502TME/NOPB part is unused and in its original packaging.
Return procedure for LM8502TME/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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