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Texas Instruments LM2758TL/NOPB
- Part No.:
- LM2758TL/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 12-WFBGA, DSBGA
- Datasheet:
-
LM2758TL/NOPB.pdf
- Description:
- IC LED DRVR RGLTR 700MA 12DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:430
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Product details
Overview
LM2758TL/NOPB from Texas Instruments is a switched-capacitor flash LED driver IC in a 12-pin DSBGA package, delivering up to 700 mA regulated current in flash mode, operating from 2.7 V to 5.5 V input, with adaptive 1×/1.5× gain selection and integrated time-out protection-designed for camera flash in compact mobile devices.
For engineers reviewing the LM2758TL/NOPB datasheet, LM2758TL/NOPB pinout, LM2758TL/NOPB application, or LM2758TL/NOPB equivalent, this page provides verified functional modes (flash/torch/indicator/shutdown), confirmed charge-pump gain transition threshold (300 mV), thermal shutdown behavior (150°C trip), soft-start implementation, and exact DSBGA pin mapping per TI SNVS551E Rev E.
Technical Context
The LM2758TL/NOPB implements a dual-gain CMOS charge pump with automatic 1× → 1.5× transition triggered when headroom voltage (VLED–) drops below 300 mV (typ), enabling stable current regulation across varying LED forward voltages. It uses two logic-controlled enable pins (EN1/EN2) to select among four discrete operational states: shutdown, indicator (1/32-duty-cycle PWM), torch (DC), and flash (DC).
Current programming is achieved via a single external resistor (RSET) connected to the ISET pin, where ILED_FLASH ≈ 7650 × (1.3 V / RSET) and ILED_TORCH ≈ 1639 × (1.3 V / RSET). Internal soft-start limits inrush current by controlling reference voltage ramp-up, and thermal protection disables output above 150°C (typ), recovering at 140°C (typ).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Up to 700 mA in flash mode - enables high-brightness single-LED flash in space-constrained mobile cameras. |
| Input Voltage Range | 2.7 V to 5.5 V - supports direct connection to single-cell Li-ion batteries without pre-regulation. |
| Charge Pump Gain | Adaptive 1× or 1.5× - dynamically selected to maintain ≥300 mV headroom across LED cathode (LED−), minimizing power loss. |
| Flash Time-Out | 814 ms (typ) - hardware-limited duration prevents thermal runaway during sustained flash operation. |
| Quiescent Current | 0.7–0.8 mA (1× mode), 4–5 mA (1.5× mode) - low standby draw extends battery life in always-on imaging subsystems. |
| Shutdown Current | 0.01 µA (typ) - near-zero leakage preserves battery during device sleep or camera idle states. |
| Switching Frequency | 1.25 MHz (typ), 0.8–1.5 MHz (over temp) - enables use of small 1 µF ceramic flying capacitors and reduces EMI filtering burden. |
Pinout & Package
LM2758TL/NOPB is housed in a 2.022 mm × 1.527 mm × 0.6 mm ultra-thin 12-pin DSBGA (YZR) package with bottom-side solder balls. The package requires NSMD (non-solder-mask-defined) pads and conforms to JEDEC MO-277 standards for wafer-level chip-scale assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 (EN1) | Logic Input | Mode control pin; combined with EN2 determines functional state (shutdown/indicator/torch/flash) per truth table. |
| A2 (SGND) | Analog Ground | Low-impedance reference for internal analog circuitry and charge-pump control; must connect directly to ground plane. |
| A3 (ISET) | Current Programming Node | Sinks precise current (1.3 V / RSET) to set LED current scaling factors for all operating modes. |
| B1 (C1+) | Flying Capacitor Terminal | Connects to positive terminal of 1 µF flying capacitor C1; forms half of 1×/1.5× charge-pump switching network. |
| B2 (CPOUT) | Regulated Output | Boosted charge-pump output node; connects to anode of flash LED and requires 2.2 µF ceramic bypass to PGND. |
| B3 (EN2) | Logic Input | Second mode control pin; logic levels relative to SGND define operational state jointly with EN1. |
| C1 (VIN) | Main Power Input | Accepts 2.7–5.5 V supply; powers internal circuitry and feeds charge-pump input stage. |
| C2 (C2+) | Flying Capacitor Terminal | Positive terminal of second 1 µF flying capacitor C2; completes dual-capacitor charge-pump topology. |
| C3 (LED−) | Current Sink Output | Regulated current source output; connects to LED cathode and sinks programmed current with <0.53 Ω output impedance. |
| D1 (C2−) | Flying Capacitor Terminal | Negative terminal of C2; paired with C2+ to form flying capacitor path for 1.5× gain operation. |
| D2 (C1−) | Flying Capacitor Terminal | Negative terminal of C1; paired with C1+ to form flying capacitor path for 1× gain operation. |
| D3 (PGND) | Power Ground | High-current return path for charge pump and LED sink; must be low-inductance connection to PCB ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| No-inductor architecture | Uses only four MLCCs (CIN, COUT, C1, C2) and one resistor-eliminates magnetic EMI, saves board area, and simplifies layout. |
| True shutdown mode | Reduces supply current to 0.01 µA (typ); disconnects internal bias networks and disables all switching activity. |
| Adaptive gain selection | Automatically switches between 1× and 1.5× based on real-time VLED– headroom-maximizes efficiency without firmware intervention. |
| Integrated flash time-out | Hardware-enforced 814 ms (typ) limit prevents thermal damage during prolonged flash activation-no external timer required. |
| Thermal protection | Shuts down output at 150°C (typ) and auto-recovers at 140°C (typ)-protects die integrity under high ambient or poor heatsinking conditions. |
Applications
| Mobile Phone Camera Flash | Digital Camera Auxiliary Flash |
|---|---|
|
Use Scenario: High-intensity illumination for still image capture in low-light smartphone environments with strict size and thermal constraints. IC Role / Device Role / Timing Role: Regulated current sink driving single white LED at 500–700 mA in flash mode, with adaptive gain and hardware time-out. Use Value: Delivers consistent luminance across battery voltage range (3.0–4.2 V) while limiting peak junction temperature to ≤125°C under 814 ms flash bursts. |
Use Scenario: Compact auxiliary flash module for point-and-shoot digital cameras requiring rapid burst capability and low standby drain. IC Role / Device Role / Timing Role: Dual-mode LED driver supporting both continuous torch (107 mA) and pulsed flash (700 mA) via EN1/EN2 logic control. Use Value: Enables 1/32-duty-cycle indicator mode for UI feedback without dedicated MCU PWM resources, reducing system firmware overhead. |
| Tablet Integrated Imaging System | Wearable Camera Module |
|
Use Scenario: Front/rear facing camera flash in thin-profile tablets where inductor height violates mechanical stack-up limits. IC Role / Device Role / Timing Role: Switched-capacitor DC-DC converter generating regulated 4.7 V CPOUT from 3.3 V rail to drive LED with minimal voltage headroom. Use Value: Achieves 90% peak efficiency using 0603-size MLCCs-reducing solution footprint to <3 mm² and eliminating inductor height penalty (>0.8 mm). |
Use Scenario: Ultra-low-volume action camera or AR glasses flash subsystem constrained by <1.0 mm Z-height and <10 mm² board area. IC Role / Device Role / Timing Role: Single-chip flash driver with DSBGA package (2.022 × 1.527 mm) and integrated soft-start to prevent inrush-induced voltage droop on shared battery rail. Use Value: Soft-start eliminates >100 mA inrush spikes during flash enable-preventing brownout resets in co-located Bluetooth/WiFi SoCs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3530UMX/NOPB | I²C-programmable 4-channel current sink (max 25 mA/channel); no charge pump; requires external boost converter for >VIN LED drive. | Targeted at RGB indicator backlighting-not optimized for high-current single-LED flash; lacks hardware time-out and adaptive gain. | Select LM3530UMX/NOPB only when multi-color dynamic lighting control is required and flash current ≤25 mA per channel. |
| TPS61310DSKR | Inductor-based boost converter with adjustable current limit (up to 1.2 A); fixed 1.5× or 2× gain; no integrated LED current regulation. | Requires external current-sense resistor and op-amp feedback loop for LED regulation-increasing BOM count and layout complexity. | Choose TPS61310DSKR when higher output voltage (>5.5 V) or >700 mA flash current is needed, accepting added inductor size and control overhead. |
Compared with LM2758TL/NOPB, LM3530UMX/NOPB offers programmability but sacrifices flash-current capability and autonomous gain management, while TPS61310DSKR delivers higher power at the cost of inductor integration and closed-loop current regulation complexity.
Availability
LM2758TL/NOPB is available at Aetrix Electronics and suitable for mobile phone camera modules, digital camera auxiliary flash systems, tablet imaging subsystems, and wearable camera modules requiring stable component supply across production lifecycles.
Supply support for LM2758TL/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 specializing in analog and embedded processing technologies, with leadership in power management, signal chain, and high-reliability interface solutions.
The LM2758TL/NOPB belongs to TI's portable LED driver product line, engineered specifically for space- and thermal-constrained camera flash applications in consumer handheld devices-emphasizing inductorless design, adaptive efficiency, and robust hardware safety features.
FAQ
What are the exact pin functions and recommended layout practices for LM2758TL/NOPB?
The LM2758TL/NOPB has 12 pins in a DSBGA package, including dual enable inputs (EN1/EN2), flying capacitor terminals (C1+/C1−/C2+/C2−), regulated output (CPOUT), current sink (LED−), and separate analog (SGND) and power (PGND) grounds. Layout requires NSMD pads, direct low-inductance connections for PGND/SGND to a solid ground plane, and 0603 MLCCs placed adjacent to respective pins per TI AN-1112 guidelines. Avoid routing sensitive analog traces near switching nodes.
How does LM2758TL/NOPB achieve adaptive 1×/1.5× gain switching, and what triggers the transition?
The LM2758TL/NOPB monitors headroom voltage (VLED–) across its current sink output. When VLED– falls below 300 mV (typ), the internal control logic switches the charge pump from 1× to 1.5× gain to maintain regulation. This transition occurs automatically without external intervention and remains latched until shutdown; re-enabling resets gain to minimum required level.
What is the maximum allowable LED forward voltage for reliable operation of LM2758TL/NOPB in flash mode?
In flash mode, LM2758TL/NOPB supports LED forward voltages up to 4.4 V when operating from 3.6 V input in 1.5× mode (CPOUT ≈ 4.7 V). With 300 mV minimum headroom, the practical VF limit is 4.4 V. At 5.5 V input, CPOUT is clamped to 4.7 V, allowing up to 4.4 V LED VF-verified across –40°C to +125°C junction temperature range per SNVS551E Section 6.5.
Can LM2758TL/NOPB drive multiple LEDs in series or parallel configurations?
LM2758TL/NOPB is designed as a single-channel current sink and drives one LED connected between CPOUT (anode) and LED− (cathode). Driving multiple LEDs in series exceeds its 4.7 V CPOUT limit; parallel connection risks current imbalance due to VF mismatch and is not supported. For multi-LED systems, use discrete LM2758TL/NOPB units per LED or select a multi-channel driver like TLC5940.
What capacitor types and values are mandatory for stable operation of LM2758TL/NOPB?
LM2758TL/NOPB requires four MLCCs: CIN and COUT = 2.2 µF X5R/X7R (6.3 V rating), C1 and C2 = 1 µF X5R/X7R (6.3 V rating). Y5V/Z5U ceramics are prohibited due to excessive capacitance drift (>–82%) over temperature. All capacitors must be 0603 case size or smaller, placed within 2 mm of respective pins, with ESR <20 mΩ to ensure stable charge-pump operation and efficiency >90%.
LM2758TL/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:
- Switched Capacitor (Charge Pump)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 2.7V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 2.7V ~ 5.3V
- Current - Output / Channel:
- 700mA
- Frequency:
- 1.25MHz
- Dimming:
- -
- Applications:
- Camera Flash
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-DSBGA
LM2758TL/NOPB FAQ
1.How can I place an order for LM2758TL/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2758TL/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 LM2758TL/NOPB reliable?
The price and inventory of LM2758TL/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2758TL/NOPB is usually 5 days.
3.What payment methods are accepted for LM2758TL/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2758TL/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2758TL/NOPB?
LM2758TL/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2758TL/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 LM2758TL/NOPB?
For technical support, including LM2758TL/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2758TL/NOPB requirements.
6.How does Aetrix verify that LM2758TL/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2758TL/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 LM2758TL/NOPB meets industry standards.
7.What is the process for return or replacement of LM2758TL/NOPB?
All LM2758TL/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2758TL/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 LM2758TL/NOPB part is unused and in its original packaging.
Return procedure for LM2758TL/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2758TL/NOPB Tags
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