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Texas Instruments LM3559TLX/NOPB
- Part No.:
- LM3559TLX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 16-WFBGA, DSBGA
- Datasheet:
-
LM3559TLX/NOPB.pdf
- Description:
- IC LED DRVR RGLTR I2C 16DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:258
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Product details
Overview
LM3559TLX/NOPB from Texas Instruments is a synchronous boost flash driver IC with dual 900-mA high-side current sources, delivering up to 1.8 A total flash current for white LED camera flash applications. It operates from 2.5 V to 5.5 V input, features 2-MHz fixed-frequency switching, I²C-compatible control (400 kHz), and integrated battery voltage sensing with flash current scale-back.
For engineers reviewing the LM3559TLX/NOPB datasheet, LM3559TLX/NOPB pinout, LM3559TLX/NOPB application, or LM3559TLX/NOPB equivalent, key selection considerations include dual independent LED current programming, hardware flash/torch enable (STROBE/TX1), thermal and open/short LED fault detection, and ultra-small 1.96 mm × 1.96 mm DSBGA-16 package suitability for space-constrained mobile designs.
Technical Context
The LM3559TLX/NOPB integrates a synchronous boost converter and two high-side current sinks in a single die, enabling grounded-cathode LED configuration. Its adaptive regulation maintains ≥270 mV headroom across LED1/LED2 while maximizing efficiency across input voltages from 2.5 V to 5.5 V.
It supports four operational modes-flash, torch, privacy indicate, and message indicator-via I²C register control and hardware pins (STROBE, TX1/TORCH/GPIO1, TX2/INT/GPIO2). Battery voltage monitoring triggers automatic flash current reduction below VIN = 2.9 V, and a 4-bit ADC monitors VLED for real-time LED health assessment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 5.5 V - supports Li-ion battery operation across full discharge curve without external LDO. |
| Total Flash Current | Up to 1.8 A (900 mA per channel) - enables high-brightness camera flash with dual parallel LEDs. |
| Switching Frequency | 2 MHz (±200 kHz) - allows use of compact 1 µH inductors and 10 µF ceramic output capacitors. |
| I²C Interface Speed | 400 kHz - compatible with standard fast-mode I²C controllers in smartphone SoCs. |
| Current Accuracy | ±4% over –40°C to +85°C at 900 mA setting - ensures consistent flash brightness across temperature. |
| Overvoltage Protection | 5.0 V ±75 mV - safeguards LEDs and downstream circuitry against boost output overvoltage events. |
| Shutdown Current | 1 µA - minimizes battery drain during system standby in always-on camera modules. |
Pinout & Package
LM3559TLX/NOPB is housed in a 16-pin DSBGA package (1.96 mm × 1.96 mm, 0.4 mm pitch) optimized for ultra-thin mobile camera modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 (LED1) | High-side current source output | Drives cathode-grounded flash LED1; supports up to 900 mA regulated current. |
| A2/B2 (OUT) | Boost converter output | Supplies regulated voltage to LED strings; requires 10 µF ceramic capacitor to GND. |
| A3/B3 (SW) | Internal switch node | Connects to 1 µH inductor; carries high di/dt switching current; critical for EMI layout. |
| A4/B4 (GND) | Power ground | Primary return path for boost and LED currents; must be low-impedance plane under IC. |
| B1 (LED2) | High-side current source output | Drives cathode-grounded flash LED2; independently programmable from LED1. |
| C1 (LEDI/NTC) | Configurable I/O | Either indicator LED current source (up to 18 mA) or NTC thermistor comparator input for thermal shutdown. |
| C2 (TX1/TORCH/GPIO1) | Multi-function control input | Hardware torch enable (active-high), RF PA sync interrupt, or GPIO - internal 300 kΩ pulldown. |
| C3 (STROBE) | Hardware flash trigger | Active-high pulse initiates flash mode immediately, overriding I²C state; internal 300 kΩ pulldown. |
| C4 (IN) | Input power supply | Accepts 2.5–5.5 V battery input; bypassed with ≥10 µF ceramic capacitor to GND. |
| D1 (TX2/INT/GPIO2) | Multi-function I/O | RF PA sync interrupt (active-high), thermal/LED fault interrupt output, or GPIO; internal 300 kΩ pulldown. |
| D2 (SDA) | I²C data line | Open-drain bidirectional interface; high-impedance during shutdown. |
| D3 (SCL) | I²C clock line | Input-only clock; high-impedance during shutdown. |
| D4 (HWEN) | Hardware enable | Active-high logic input; pulling low forces immediate shutdown with <1 µA quiescent current. |
Key Features
| Feature | Design Value |
|---|---|
| Dual high-side current sources | Enables grounded-cathode LED layout - simplifies PCB routing and improves thermal management vs. low-side drivers. |
| Programmable flash/torch current (28.125 mA–1.8 A) | 12-bit resolution via I²C registers allows precise brightness tuning for both photo capture and video illumination. |
| Battery-aware flash scaling | Automatically reduces flash current when VIN drops below 2.9 V - prevents brownout during high-current LED pulses. |
| Integrated LED fault detection | Real-time open/short LED detection via VLED monitoring and OVP flagging - eliminates need for external sense resistors. |
| Thermal protection with NTC interface | C1 pin doubles as comparator input for external NTC thermistor - triggers current reduction before LED overheating occurs. |
Applications
| Smartphone Camera Flash | Tablet Dual-LED Illumination |
|---|---|
|
Use Scenario: High-intensity still-image capture in low-light conditions using dual white LEDs. IC Role / Device Role / Timing Role: Synchronous boost driver with dual 900-mA current sources delivers 1.8-A peak flash current synchronized to image sensor exposure timing. Use Value: Enables >100-lux illumination at 1 m distance while maintaining battery life via adaptive current scaling below 2.9 V VIN. |
Use Scenario: Video recording illumination requiring stable, flicker-free continuous LED bias. IC Role / Device Role / Timing Role: Torch-mode current regulator with independent LED1/LED2 control provides uniform brightness across large-area LED arrays. Use Value: Delivers 337.5 mA per LED at ±4% accuracy over –40°C to +85°C - eliminates visible brightness drift during extended video sessions. |
| Privacy Indicator Light | Mobile Device Message Alert |
|
Use Scenario: User-configurable LED pattern indicating microphone/camera activation status. IC Role / Device Role / Timing Role: Programmable indicator current source (C1 pin) with built-in pattern generator for privacy compliance signaling. Use Value: Supports 8 distinct blink patterns via I²C register control - satisfies GDPR/CCPA visual notification requirements without MCU intervention. |
Use Scenario: Non-intrusive LED alert for incoming messages or notifications on handheld devices. IC Role / Device Role / Timing Role: Low-power indicator mode (≤18 mA) with configurable duty cycle and fade timing controlled via I²C. Use Value: Draws only 590 µA in indicate mode - extends standby battery life while providing customizable visual feedback. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED flash driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3554TLX/NOPB | Single 1.5-A current source; no dual-LED independent control; lacks NTC interface and privacy indicator mode. | Targeted for cost-sensitive single-LED flash; not suitable for dual-LED or thermal-sensing designs. | Select LM3554TLX/NOPB only when dual-channel independence and thermal monitoring are unnecessary. |
| RT8548CGQW | 2.5-A total flash current; 1.5-MHz switching; no integrated I²C ADC or NTC comparator; different pinout and register map. | Higher peak current for premium smartphones; requires external ADC for VLED monitoring. | Choose RT8548CGQW when >1.8-A flash current is mandatory and system-level thermal sensing is handled externally. |
Compared with LM3559TLX/NOPB, LM3554TLX/NOPB sacrifices dual-LED flexibility and thermal safety for lower BOM count, while RT8548CGQW trades integrated diagnostics for higher peak current - making LM3559TLX/NOPB optimal for thermally constrained dual-LED camera modules requiring autonomous fault response.
Availability
LM3559TLX/NOPB is available at Aetrix Electronics and suitable for smartphone camera flash, tablet LED illumination, privacy indicator lighting, and mobile device message alert systems requiring stable component supply and long-term production continuity.
Supply support for LM3559TLX/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 and embedded processing technologies, with decades of expertise in power management and LED driver innovation.
The LM3559TLX/NOPB belongs to TI's high-efficiency LED flash driver product line, designed specifically for space-constrained, battery-powered imaging systems requiring precision current regulation, thermal resilience, and hardware-triggered responsiveness.
FAQ
What is the maximum total flash current supported by the LM3559TLX/NOPB?
The LM3559TLX/NOPB supports up to 1.8 A total flash current, achieved by paralleling its two independent 900-mA high-side current sources (LED1 and LED2). This rating is specified over –40°C to +85°C ambient temperature with ±4% accuracy at the 900-mA-per-channel setting, as confirmed in Section 6.5 of the SNVS624B datasheet.
Does the LM3559TLX/NOPB support hardware-triggered flash mode independent of I²C communication?
Yes, the LM3559TLX/NOPB supports fully autonomous hardware-triggered flash via the STROBE pin (C3), which is an active-high input with internal 300-kΩ pulldown. Driving STROBE high immediately initiates flash mode at the pre-programmed current level, bypassing I²C latency - essential for time-critical camera synchronization.
How does the LM3559TLX/NOPB handle low-battery conditions during flash operation?
The LM3559TLX/NOPB incorporates a dedicated VIN flash monitor that detects input voltage below 2.9 V (±50 mV) and automatically scales back flash current to preserve system stability. This behavior is enabled by default and documented in Section 8.3.2 of the datasheet, ensuring reliable flash performance across the full Li-ion battery discharge range.
Can the LM3559TLX/NOPB drive LEDs in a common-anode configuration?
No, the LM3559TLX/NOPB is designed exclusively for grounded-cathode (common-anode) LED configurations via its dual high-side current sources (LED1 and LED2 pins). It cannot sink current or support low-side switching; attempting common-cathode layouts would violate the required ≥270 mV headroom specification and disable regulation.
What thermal protection mechanisms are integrated into the LM3559TLX/NOPB?
The LM3559TLX/NOPB includes dual thermal safeguards: (1) internal junction thermal shutdown at 150°C (typical), and (2) user-configurable NTC-based LED temperature monitoring via the LEDI/NTC pin (C1), which triggers current reduction upon thermistor threshold crossing. Both mechanisms are detailed in Sections 6.1 and 8.3.5 of the SNVS624B datasheet.
LM3559TLX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-WFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 2
- Voltage - Supply (Min):
- 2.5V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 5V
- Current - Output / Channel:
- 900mA (Flash)
- Frequency:
- 2MHz
- Dimming:
- I2C
- Applications:
- Camera Flash
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-DSBGA
LM3559TLX/NOPB FAQ
1.How can I place an order for LM3559TLX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3559TLX/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 LM3559TLX/NOPB reliable?
The price and inventory of LM3559TLX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3559TLX/NOPB is usually 5 days.
3.What payment methods are accepted for LM3559TLX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3559TLX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3559TLX/NOPB?
LM3559TLX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3559TLX/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 LM3559TLX/NOPB?
For technical support, including LM3559TLX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3559TLX/NOPB requirements.
6.How does Aetrix verify that LM3559TLX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3559TLX/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 LM3559TLX/NOPB meets industry standards.
7.What is the process for return or replacement of LM3559TLX/NOPB?
All LM3559TLX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3559TLX/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 LM3559TLX/NOPB part is unused and in its original packaging.
Return procedure for LM3559TLX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM3559TLX/NOPB Tags
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