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Texas Instruments LM3561TMX/NOPB
- Part No.:
- LM3561TMX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 12-WFBGA, DSBGA
- Datasheet:
-
LM3561TMX/NOPB.pdf
- Description:
- IC LED DRVR RGLTR I2C 12DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,144
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Product details
Overview
LM3561TMX/NOPB from Texas Instruments is a synchronous boost LED flash driver IC with integrated 600-mA high-side current source, 2-MHz fixed-frequency switching, I²C-compatible interface, and thermal/NTC sensing capability-designed for camera phone flash applications requiring precise current control and battery-aware operation.
For engineers reviewing the LM3561TMX/NOPB datasheet, LM3561TMX/NOPB pinout, LM3561TMX/NOPB application, or LM3561TMX/NOPB equivalent, this page delivers verified technical context, validated pin functions, real-world operating modes (Flash/Torch/Indicator), confirmed fault detection features (open/short LED, VIN monitor, thermal shutdown), and direct alternative part comparisons grounded in TI's official documentation.
Technical Context
The LM3561TMX/NOPB integrates a 2-MHz constant-frequency synchronous boost converter with a regulated 250-mV headroom voltage (VHR) to maintain LED current accuracy across input voltages from 2.5 V to 5.5 V. Its high-side current source enables grounded-cathode LED configuration while supporting pass-mode operation when VIN > VLED + 250 mV.
Control is implemented via a 400-kHz I²C interface with seven readable fault flags-including flash timeout, thermal shutdown (150°C), LED open/short, NTC overtemperature, and VIN monitor-and dual TX inputs (TX1/TX2) that force low-current torch mode during RF power amplifier pulses or high-battery-current events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 5.5 V - supports single-cell Li-ion and Li-poly battery systems without external regulation |
| LED Current Range | 18 mA to 600 mA - programmable in 16 Flash and 8 Torch steps via I²C registers |
| Switching Frequency | 2 MHz ±10% - enables ultra-compact magnetics (1 µH inductor) and <16 mm² total solution size |
| Headroom Voltage (VHR) | 250 mV typical - ensures stable current regulation and ≥90% efficiency across load and input conditions |
| Thermal Shutdown Threshold | 150°C (typ.) - latches fault flag until I²C Flags register is read, preventing uncontrolled reactivation |
| I²C Interface Speed | Up to 400 kHz - compatible with standard-mode I²C controllers and supports full register read/write access |
| Package Dimensions | 1.215 mm × 1.615 mm × 0.6 mm - 12-bump DSBGA (YFQ0012AAA) for space-constrained mobile PCBs |
Pinout & Package
LM3561TMX/NOPB is housed in a 12-bump wafer-level chip-scale package (DSBGA), designated YFQ0012AAA, with 0.4-mm pitch and bottom-side solder bumps. The package supports automated assembly and provides thermal performance of θJA = 68°C/W on a 4-layer FR-4 board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (A1) | Power Ground Reference | Primary return path for boost converter, LED current, and logic circuits; must be low-impedance connection to PCB ground plane |
| IN (A2) | Main Power Input | Connects to battery or DC supply; requires ≥10 µF ceramic bypass capacitor to GND for stability and transient response |
| HWEN (A3) | Active-Low Hardware Enable | Pull high to enable operation; tied low to force immediate shutdown during system faults-no software dependency |
| SW (B1) | Internal Switch Node | Connection point between internal NMOS/PMOS switches and external inductor; critical for EMI and layout integrity |
| STROBE (B2) | Hardware Flash Trigger | Active-high input; initiates Flash mode immediately-bypasses I²C latency for camera shutter synchronization |
| SCL (B3) | I²C Clock Input | Accepts up to 400 kHz clock; internal pull-down not provided-requires external pull-up resistor |
| OUT (C1) | Boost Converter Output | Drives LED anode; requires 10 µF ceramic capacitor to GND for output filtering and OVP clamping |
| TX1/TORCH/GPIO (C2) | Multi-Function Interrupt Pin | Configurable as flash interrupt, hardware torch enable, or general-purpose I/O; includes 300 kΩ internal pulldown |
| SDA (C3) | I²C Data I/O | Open-drain bidirectional data line; requires external pull-up resistor matching SCL |
| LED (D1) | High-Side LED Current Source | Sinks up to 600 mA from LED anode; supports grounded-cathode LED placement for simplified thermal management |
| LEDI/NTC (D2) | Indicator/Thermal Sense Input | Configurable as 18 mA indicator driver or comparator input (1 V reference) for NTC thermistor-based LED temperature monitoring |
| TX2/GPIO2/INT (D3) | Secondary Interrupt/Output | Provides fault notification (e.g., thermal, VIN, LED fault) or GPIO functionality; includes 300 kΩ internal pulldown |
Key Features
| Feature | Design Value |
|---|---|
| Three Operating Modes (Flash/Torch/Indicator) | Enables unified LED control architecture: high-current burst (Flash), steady illumination (Torch), and status indication-all via same IC and I²C interface |
| Programmable Flash Timeout (32–1024 ms) | Prevents LED overheating and battery drain by enforcing maximum flash duration; configurable in 32-ms increments via Flash Duration Register |
| Dual TX Inputs for RF Pulse Coordination | Allows dynamic current reduction during PA transmit bursts-maintains system power integrity without disabling flash functionality |
| Integrated Open/Short LED Detection | Monitors output voltage and current to identify LED failure conditions; asserts dedicated fault flag readable over I²C |
| LED Thermal Sensing via NTC Interface | Uses LEDI/NTC pin with internal 1-V reference to detect LED junction temperature rise and scale back current before thermal damage occurs |
| 250-mV Regulated Headroom (VHR) | Ensures consistent LED current regulation across varying forward voltage and battery voltage sag-critical for color consistency in flash photography |
Applications
| Smartphone Camera Flash | Tablet LED Illumination |
|---|---|
Use Scenario: High-intensity, short-duration flash for low-light photography in compact mobile devices with single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Primary flash driver controlling 600-mA LED current with hardware-triggered STROBE input synchronized to camera shutter timing. Use Value: Delivers consistent luminance across battery discharge (2.5–5.5 V), maintains color fidelity via 250-mV headroom regulation, and prevents thermal runaway using NTC feedback. |
Use Scenario: Dual-mode lighting for front-facing video calls (torch) and rear-camera capture (flash) in tablets with larger display bezels. IC Role / Device Role / Timing Role: Single-chip solution managing both continuous and pulsed LED operation, leveraging I²C to switch modes and adjust brightness dynamically. Use Value: Reduces BOM count by consolidating torch/flash/indicator functions; supports seamless transition between modes with <80 µs settling time (torch→flash). |
| Wearable Imaging Devices | Industrial Inspection Cameras |
Use Scenario: Miniaturized endoscopic or action cameras where PCB area <16 mm² and thermal dissipation are critical constraints. IC Role / Device Role / Timing Role: Ultra-compact flash controller using DSBGA package and integrated current source-eliminates external sense resistor and reduces trace inductance. Use Value: Achieves 90% peak efficiency at 3.6 V input; enables reliable flash operation down to –40°C ambient via validated –40°C to +85°C operating range. |
Use Scenario: Machine vision systems requiring repeatable, calibrated flash pulses for barcode scanning or surface defect detection under variable lighting. IC Role / Device Role / Timing Role: Precision current source with programmable flash timeout and fault reporting-ensuring consistent photon output per trigger event. Use Value: Provides I²C-readable fault flags (e.g., LED open, VIN undervoltage) for predictive maintenance; supports flash duration accuracy within ±10% via 2-MHz clock derivation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED flash driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3554TMX/NOPB | Same 12-bump DSBGA package and 2-MHz boost architecture, but supports dual-flash outputs (600 mA each) and lacks NTC sensing on LEDI/NTC pin | Required for dual-LED flash arrays; unsuitable where thermal derating via NTC is mandatory | Select LM3554TMX/NOPB only when driving two independent LEDs and NTC-based thermal protection is not needed |
| MAX77691EWL+T | 3.2-MHz boost with 1.2-A flash current, integrated charger, and 12-bit ADC-but uses 20-pin WLP (2.13 × 1.53 mm), larger footprint and higher quiescent current (2.3 µA vs. 1.1 µA) | Targeted at power-management-integrated designs; adds complexity if only flash control is required | Choose MAX77691EWL+T when combining flash control with battery charging and system monitoring in space-constrained wearables |
Compared with LM3561TMX/NOPB, LM3554TMX/NOPB offers dual-output flexibility at the cost of missing NTC thermal sensing, while MAX77691EWL+T delivers higher current and system integration but increases PCB area and design complexity-making LM3561TMX/NOPB optimal for cost-sensitive, thermally aware single-LED flash applications.
Availability
LM3561TMX/NOPB is available at Aetrix Electronics and suitable for smartphone camera modules, tablet imaging subsystems, and industrial inspection equipment requiring stable component supply, guaranteed long-term availability, and full traceability.
Supply support for LM3561TMX/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 power management technologies, with decades of experience in mobile power and lighting solutions.
The LM3561TMX/NOPB belongs to TI's LED flash driver product line, engineered specifically for space-constrained, battery-powered imaging systems demanding high efficiency, precise current control, and intelligent thermal management.
FAQ
What is the primary function of the LM3561TMX/NOPB in a camera module?
The LM3561TMX/NOPB serves as a fully integrated synchronous boost LED flash driver with 600-mA high-side current source, enabling precise, efficient, and thermally managed illumination for smartphone and tablet cameras. It directly controls LED current in Flash, Torch, and Indicator modes via I²C or hardware pins like STROBE and HWEN-making LM3561TMX/NOPB central to reliable low-light image capture.
Does the LM3561TMX/NOPB support thermal protection for the LED?
Yes, the LM3561TMX/NOPB supports LED thermal protection through its LEDI/NTC pin, which can be configured as a comparator input with an internal 1-V reference to monitor voltage across an external NTC thermistor. When overtemperature is detected, LM3561TMX/NOPB scales back LED current and asserts the NTC fault flag-providing closed-loop thermal derating without host processor intervention.
How does the LM3561TMX/NOPB handle low-input-voltage conditions?
The LM3561TMX/NOPB includes a programmable input voltage monitor that triggers when VIN falls below a user-defined threshold (e.g., 2.90 V). Upon detection, it can reduce flash current or shut down entirely to prevent battery brownout-reporting the event via the VIN Monitor flag accessible over the I²C interface. This behavior is configurable in the VIN Monitor Register and applies across the full 2.5–5.5 V input range of LM3561TMX/NOPB.
Can the LM3561TMX/NOPB operate without I²C communication?
Yes, the LM3561TMX/NOPB supports autonomous operation using hardware control pins: STROBE initiates Flash mode, HWEN enables/disables the device, and TX1/TX2 force torch-mode current reduction during RF events. While I²C is required for configuration (e.g., current levels, timeout), basic flash/torch activation and fault response work independently-ensuring LM3561TMX/NOPB remains functional even if the I²C bus is unavailable during critical capture sequences.
What package type and dimensions does the LM3561TMX/NOPB use?
The LM3561TMX/NOPB uses a 12-bump DSBGA package (TI designation YFQ0012AAA) measuring 1.215 mm × 1.615 mm × 0.6 mm with 0.4-mm bump pitch. This wafer-level chip-scale package enables ultra-dense placement in mobile PCBs and achieves θJA = 68°C/W on a standard 4-layer board-making LM3561TMX/NOPB ideal for next-generation compact imaging modules.
LM3561TMX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 12-WFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 2.5V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- -
- Current - Output / Channel:
- 600mA (Flash)
- Frequency:
- 2MHz
- Dimming:
- I2C
- Applications:
- Camera Flash
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-DSBGA
LM3561TMX/NOPB FAQ
1.How can I place an order for LM3561TMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3561TMX/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 LM3561TMX/NOPB reliable?
The price and inventory of LM3561TMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3561TMX/NOPB is usually 5 days.
3.What payment methods are accepted for LM3561TMX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3561TMX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3561TMX/NOPB?
LM3561TMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3561TMX/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 LM3561TMX/NOPB?
For technical support, including LM3561TMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3561TMX/NOPB requirements.
6.How does Aetrix verify that LM3561TMX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3561TMX/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 LM3561TMX/NOPB meets industry standards.
7.What is the process for return or replacement of LM3561TMX/NOPB?
All LM3561TMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3561TMX/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 LM3561TMX/NOPB part is unused and in its original packaging.
Return procedure for LM3561TMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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