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Texas Instruments LM2759SDX/NOPB
- Part No.:
- LM2759SDX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LM2759SDX/NOPB.pdf
- Description:
- IC LED DRVR RGLTR I2C 1A 12WSON
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM2759SDX/NOPB from Texas Instruments is a 1A switched-capacitor flash LED driver IC with I²C-compatible interface, adaptive 1x/1.5x/2x charge pump gain selection, and integrated current sink for camera flash applications. It operates from 2.7V–5.5V input, delivers up to 1A Flash current or 180mA Torch current, and achieves 90% peak efficiency in mobile phone camera modules.
For engineers reviewing the LM2759SDX/NOPB datasheet, LM2759SDX/NOPB pinout, LM2759SDX/NOPB application, or LM2759SDX/NOPB equivalent, key selection considerations include its 12-pin WSON (3mm × 3mm × 0.8mm) package, TX-synchronized RF PA pulse handling, programmable flash timeout (60–1100 ms), and precise ±10% LED current accuracy in Flash mode.
Technical Context
The LM2759SDX/NOPB implements an adaptive CMOS charge pump architecture that dynamically selects 1x, 1.5x, or 2x gain based on real-time headroom voltage (VGDX < 350 mV triggers gain transition) across the ISINK current sink terminal. Its closed-loop regulation maintains constant LED current despite input voltage and forward-voltage variations.
It integrates dual asynchronous control logic: Strobe enables hardware-triggered flash with duration limited by programmed timeout, while TX pin reduces LED current to Torch level during RF PA transmission pulses. All operational modes-Shutdown, Torch, Flash, Indicator-are fully configurable via I²C (slave address 0x53) with dedicated registers for flash current (0xB0), torch current (0xA0), and timeout duration (0xC0).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Output Current | 1 A Flash mode - supports high-brightness single-LED flash in smartphone cameras without inductor |
| Input Voltage Range | 2.7 V to 5.5 V - compatible with single-cell Li-ion battery (3.0–4.2 V nominal) with full regulation margin |
| Charge Pump Gains | Adaptive 1x/1.5x/2x - automatically selects optimal gain to maximize efficiency across LED VF and VIN |
| LED Current Accuracy | ±10% in Flash mode - ensures consistent flash intensity across units and temperature (-30°C to +125°C TJ) |
| I²C Interface | Standard-mode (100 kHz), slave address 0x53 - enables dynamic brightness, timing, and mode control from baseband processor |
| Peak Efficiency | 90% - achieved at typical operating points (e.g., VIN = 3.6 V, ILED = 1 A, 2x gain), minimizing thermal load |
| Package | 12-pin WSON (3 mm × 3 mm × 0.8 mm, DQB0012A) - thermally enhanced for high-current operation in space-constrained PCBs |
Pinout & Package
LM2759SDX/NOPB is housed in a thermally enhanced 12-pin WSON package (3 mm × 3 mm × 0.8 mm, Package Number DQB0012A) with exposed die-attach pad connected to GND for improved heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| C1−, C1+ | Flying capacitor terminals (Stage 1) | Connect external 2.2 µF ceramic capacitor to enable 1.5x/2x charge pump operation; low-ESR X5R/X7R required |
| C2−, C2+ | Flying capacitor terminals (Stage 2) | Connect second 2.2 µF ceramic capacitor for 2x gain path; critical for stable high-current output regulation |
| VIN | Main power input | Accepts 2.7–5.5 V supply; powers internal circuitry and charge pump; requires 2.2 µF bypass capacitor (CIN) |
| VOUT | Regulated charge pump output | Delivers 4.7 V (1x/1.5x) or 5.1 V (2x) to LED anode; connects directly to flash LED anode in typical layout |
| GND | Ground reference | Primary return path for all currents; die-attach pad must be soldered to large PCB ground plane for thermal management |
| ISINK | Current sink output | LED cathode connection point; sinks up to 1 A with ±10% accuracy; voltage headroom (VGDX) controls gain transitions |
| SDA, SCL | I²C bidirectional data/clock | Enable register-based configuration of flash/torch current, timeout, mode, and strobe inhibit; require pull-up resistors |
| Strobe | Hardware flash enable | Active-high signal initiates Flash mode for duration defined by timeout register or until pin deasserted |
| TX | RF PA synchronization input | High-level assertion forces immediate reduction of LED current to Torch level during RF transmission to avoid battery sag |
Key Features
| Feature | Design Value |
|---|---|
| No-inductor architecture | Eliminates EMI-prone magnetics and saves >30% board area vs. inductive boost drivers; solution area < 22 mm² |
| Adaptive gain selection | Monitors VGDX at ISINK to autonomously switch between 1x/1.5x/2x modes-no firmware intervention needed |
| Flash time-out protection | Prevents thermal runaway by disabling current sink after programmable duration (60–1100 ms); resets on re-enable |
| Load disconnect in shutdown | Internally isolates VOUT from VIN and disables ISINK path-reduces system standby current to 5.8–9.7 µA |
| TX-synchronized current limiting | Hardware-level response (<1 µs latency) to RF PA pulse: reduces flash current to preprogrammed torch level without I²C delay |
Applications
| Smartphone Camera Flash | Tablet Integrated Flash Module |
|---|---|
|
Use Scenario: High-intensity still-image capture in low-light conditions using single high-power white LED. IC Role / Device Role / Timing Role: Constant-current flash driver with adaptive voltage boosting and hardware-triggered strobe timing. Use Value: Delivers 1 A peak current with ±10% accuracy and 90% efficiency, enabling bright, repeatable flash without inductor-induced EMI near RF sections. |
Use Scenario: Dual-LED flash implementation requiring synchronized illumination and thermal-safe duty cycling. IC Role / Device Role / Timing Role: Primary flash controller managing current sharing, gain optimization, and TX-pulse coordination across multiple LEDs. Use Value: Adaptive 1.5x/2x gain maintains regulation across varying LED VF and battery voltage, while flash timeout prevents sustained 1 A dissipation in compact tablet enclosures. |
| Industrial Barcode Scanner Illumination | Medical Endoscope Light Source |
|
Use Scenario: Short-duration, high-intensity LED burst for rapid barcode decoding under ambient light. IC Role / Device Role / Timing Role: Precision current source triggered by microcontroller GPIO (Strobe) with sub-millisecond turn-on. Use Value: 1 MHz fixed-frequency operation ensures clean, jitter-free flash pulses; soft-start prevents inrush-induced MCU reset during activation. |
Use Scenario: Sterilizable, low-EMI illumination module for minimally invasive surgical imaging systems. IC Role / Device Role / Timing Role: Isolated flash driver with I²C-configurable torch/flash levels and thermal shutdown (TJ > 150°C). Use Value: No-inductor design eliminates magnetic field interference with sensitive image sensors; WSON package supports conformal coating and autoclave compatibility. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61310DSKR | Inductor-based boost converter; 1.5 A max output; no integrated current sink; requires external sense resistor | Higher peak current but larger solution size (>40 mm²); lacks TX pin and flash timeout; needs additional IC for current regulation | Choose when higher than 1 A flash current or wider input range (0.9–5.5 V) is required, and board area is not constrained. |
| MAX8630YETA+ | Capacitive charge pump; 750 mA max; I²C interface; 10-pin TDFN; no TX pin or adaptive gain | Limited to lower-power flash; fixed 1.5x gain only; no RF synchronization capability; smaller thermal pad | Choose for cost-sensitive, lower-brightness applications where TX coordination and 1 A capability are unnecessary. |
Compared with TPS61310DSKR and MAX8630YETA+, the LM2759SDX/NOPB uniquely combines 1 A flash current, adaptive gain, hardware TX synchronization, and flash timeout in a 22 mm² inductorless solution-making it optimal for space- and thermal-constrained mobile camera systems.
Availability
LM2759SDX/NOPB is available at Aetrix Electronics and suitable for smartphone camera modules, industrial barcode scanners, and medical endoscope illumination systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LM2759SDX/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 expertise in portable power and precision analog ICs.
The LM2759SDX/NOPB belongs to TI's high-efficiency LED driver product line, engineered specifically for ultra-compact, high-current flash applications in battery-powered imaging devices where inductor elimination and RF coexistence are critical.
FAQ
What is the maximum continuous LED current supported by the LM2759SDX/NOPB?
The LM2759SDX/NOPB supports up to 1 A continuous LED current in Flash mode, as confirmed in the Electrical Characteristics table (IFLASH = 1 A, ADDR xB0 = 0x0F). This rating applies under typical thermal conditions with proper PCB copper area and airflow; derating is required above 85°C ambient or with restricted heat sinking.
Does the LM2759SDX/NOPB require an inductor for operation?
No, the LM2759SDX/NOPB uses a switched-capacitor (charge pump) architecture and requires only four external ceramic capacitors (CIN, COUT, C1, C2)-no inductor is needed. This eliminates magnetic EMI and reduces solution footprint to under 22 mm², as stated in the Features section and Typical Application Circuit.
How does the TX pin function in the LM2759SDX/NOPB?
The TX pin on the LM2759SDX/NOPB is an active-high input that forces the device to reduce LED current from Flash level to the programmed Torch level during RF power amplifier transmission. This prevents excessive battery current draw and voltage sag, as detailed in the Logic Control Pins table and APPLICATION INFORMATION section.
What is the I²C slave address of the LM2759SDX/NOPB?
The LM2759SDX/NOPB has a fixed 7-bit I²C slave address of 0x53 (1010011b), as specified in the I2C COMPATIBLE CHIP ADDRESS section. Communication uses standard-mode (100 kHz) timing, and the device acknowledges writes to registers including Flash Current (0xB0), Torch Current (0xA0), and Flash Timeout (0xC0).
What thermal protection features does the LM2759SDX/NOPB include?
The LM2759SDX/NOPB incorporates internal thermal shutdown that disables operation when junction temperature exceeds 150°C (typ.), with automatic recovery when TJ falls below 120°C (typ.). This is documented in Absolute Maximum Ratings and Thermal Protection sections, and is enabled by the exposed GND die-attach pad in the WSON package.
LM2759SDX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Switched Capacitor (Charge Pump)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 2.7V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 2V ~ 4V
- Current - Output / Channel:
- 1A (Flash)
- Frequency:
- 1MHz
- Dimming:
- I2C
- Applications:
- Camera Flash
- Operating Temperature:
- -30°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-WSON (3x3)
LM2759SDX/NOPB FAQ
1.How can I place an order for LM2759SDX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2759SDX/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 LM2759SDX/NOPB reliable?
The price and inventory of LM2759SDX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2759SDX/NOPB is usually 5 days.
3.What payment methods are accepted for LM2759SDX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2759SDX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2759SDX/NOPB?
LM2759SDX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2759SDX/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 LM2759SDX/NOPB?
For technical support, including LM2759SDX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2759SDX/NOPB requirements.
6.How does Aetrix verify that LM2759SDX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2759SDX/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 LM2759SDX/NOPB meets industry standards.
7.What is the process for return or replacement of LM2759SDX/NOPB?
All LM2759SDX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2759SDX/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 LM2759SDX/NOPB part is unused and in its original packaging.
Return procedure for LM2759SDX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2759SDX/NOPB Tags
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BCR421UE6327HTSA1
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HV9910CLG-G
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