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Texas Instruments LM2758TLX/NOPB
- Part No.:
- LM2758TLX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 12-WFBGA, DSBGA
- Datasheet:
-
LM2758TLX/NOPB.pdf
- Description:
- IC LED DRVR RGLTR 700MA 12DSBGA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM2758TLX/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 - used for high-brightness camera flash in space-constrained mobile phones.
For engineers reviewing the LM2758TLX/NOPB datasheet, LM2758TLX/NOPB pinout, LM2758TLX/NOPB application, or LM2758TLX/NOPB equivalent, key selection considerations include its no-inductor architecture, thermal shutdown at 150°C, 814-ms flash timeout, RSET-programmable current, and DSBGA footprint compatibility with ultra-thin handheld PCBs.
Technical Context
The LM2758TLX/NOPB implements a CMOS charge pump with dynamically selected 1× or 1.5× gain based on headroom voltage (VLED–) crossing 300 mV threshold; it uses two flying capacitors (C1, C2) and regulates output via a current-sink architecture referenced to ISET pin voltage (1.3 V typical).
Its dual enable pins (EN1/EN2) define four functional modes - shutdown, indicator (1/32-duty-cycle PWM), torch (DC), and flash (DC) - with internal soft-start, 1.2-A current limit, and thermal protection that disables operation above 150°C junction temperature and recovers at 140°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Up to 700 mA in flash mode - sufficient to drive high-luminance white LEDs in smartphone camera modules. |
| Input Voltage Range | 2.7 V to 5.5 V - compatible with single-cell Li-ion batteries including fully charged (4.2 V) and deeply discharged (2.8 V) states. |
| Charge Pump Gain | Adaptive 1× or 1.5× - automatically switches to boost mode when LED forward voltage exceeds available headroom, minimizing power loss. |
| Flash Timeout | 814 ms typical - prevents thermal runaway during sustained flash activation by disabling current sink after fixed duration. |
| Quiescent Current | 0.7–0.8 mA in 1× mode - enables low-power standby in always-on camera subsystems without draining battery. |
| Shutdown Current | 0.01 µA typical - ensures near-zero leakage when disabled, critical for long-term system sleep states. |
| Switching Frequency | 1.25 MHz typical - allows use of small 1-µF ceramic flying capacitors and reduces EMI compared to lower-frequency charge pumps. |
Pinout & Package
LM2758TLX/NOPB is housed in a 2.022 mm × 1.527 mm × 0.6 mm ultra-thin 12-pin DSBGA (YZR) package with bottom-side ball layout optimized for minimal PCB area and thermal performance in thin mobile form factors.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 EN1 | Mode control input | Logic input defining operational mode with EN2 per truth table; internal 500-kΩ pulldown enables default shutdown when floating. |
| A2 SGND | Analog ground | Low-impedance reference for charge pump control circuitry; must connect directly to solid ground plane to avoid regulation error. |
| A3 ISET | Current programming node | 1.3-V reference point where external RSET resistor sets torch/flash current via gain-dependent scaling (1639×/7650×). |
| B1 C1+ | Flying capacitor terminal | Connects to one end of 1-µF ceramic flying capacitor C1; forms half of charge transfer path in 1×/1.5× pump topology. |
| B2 CPOUT | Regulated output | Charge pump output node; connects to LED anode and requires 2.2-µF ceramic bypass to PGND for stability and ripple suppression. |
| B3 EN2 | Mode control input | Second logic input enabling 4-mode selection with EN1; identical pulldown behavior supports robust level-sensitive interface. |
| C1 VIN | Main power input | Primary supply connection for charge pump and internal circuitry; accepts 2.7–5.5 V with recommended 2.2-µF input decoupling. |
| C2 C2+ | Flying capacitor terminal | Connects to one end of second 1-µF flying capacitor C2; works with C1 to enable efficient 1.5× voltage doubling operation. |
| C3 LED− | Current sink output | Regulated current source output; connects to LED cathode and provides precise, temperature-stable sink current independent of VLED. |
| D1 C2− | Flying capacitor terminal | Completes C2 connection; paired with C2+ to form flying capacitor loop essential for charge redistribution in boost mode. |
| D2 C1− | Flying capacitor terminal | Completes C1 connection; forms complementary pair with C1+ to support bidirectional charge transfer in both gain modes. |
| D3 PGND | Power ground | High-current return path for charge pump switching and LED sink; requires direct low-impedance connection to PCB ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| No-inductor architecture | Eliminates magnetic components and EMI concerns - only four MLCCs (CIN, COUT, C1, C2) and one RSET required for full functionality. |
| Adaptive gain selection | Automatically transitions between 1× and 1.5× based on real-time VLED– headroom, maximizing efficiency across varying LED VF and battery voltage. |
| Triple-mode LED control | Hardware-level support for indicator (PWM), torch (DC), and flash (DC) via simple EN1/EN2 logic - no firmware or external timing circuitry needed. |
| Integrated safety protections | Combines 814-ms flash timeout, thermal shutdown (150°C), and 1.2-A current limiting to prevent damage under fault or misuse conditions. |
| Ultra-small DSBGA footprint | 2.022 mm × 1.527 mm area with 0.6-mm height - enables integration into <9-mm camera module bezels without compromising thermal or electrical performance. |
Applications
| Smartphone Camera Flash | Digital Still Camera Auxiliary Light |
|---|---|
Use Scenario: High-intensity illumination for low-light photography in compact smartphones with strict Z-height constraints. IC Role / Device Role / Timing Role: Constant-current flash driver providing 700-mA regulated sink with automatic gain adaptation and fixed 814-ms cutoff. Use Value: Enables full-frame flash exposure without thermal throttling or PCB area penalty - replaces bulkier inductor-based solutions. |
Use Scenario: Secondary lighting source in entry-level digital cameras requiring consistent color rendering and fast turn-on. IC Role / Device Role / Timing Role: Torch-mode DC current source delivering 107 mA (RSET = 20 kΩ) with soft-start and low quiescent draw. Use Value: Provides stable, flicker-free illumination for video assist while consuming <0.8 mA in active standby - extends battery life. |
| Tablet Front-Facing Flash | Wearable Imaging Module |
Use Scenario: Front-camera flash for video calls and portrait capture in slim tablets with limited board space. IC Role / Device Role / Timing Role: Indicator-mode pulsating current source (1/32 duty cycle) synchronized to system clock for low-average-power notification lighting. Use Value: Delivers visible LED indication using same torch-current magnitude but 32× lower average power - ideal for always-on UX features. |
Use Scenario: Miniaturized imaging subsystem in AR glasses or body-worn cameras needing ultra-low-profile power management. IC Role / Device Role / Timing Role: Compact, thermally robust flash driver with DSBGA package and 0.01-µA shutdown current for intermittent-use applications. Use Value: Maintains reliable flash operation at junction temperatures up to 125°C while occupying <3.1 mm² PCB area - meets wearable thermal envelope limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3644YFFR | 2-MHz switching frequency, I²C programmability, dual-flash-channel support; requires external I²C host and larger 16-pin WSON package. | Supports synchronized dual-LED flash and dynamic brightness control - suited for flagship smartphones with advanced camera ISPs. | Select LM3644YFFR when I²C configurability, dual-channel operation, or higher-frequency operation is required; not drop-in compatible due to different pinout and control interface. |
| MAX8630YETA+ | Fixed 1.5× gain only, no adaptive transition; 1.1-MHz switching; uses 10-pin TDFN package with exposed pad for enhanced thermal dissipation. | Lacks torch/indicator mode flexibility and timeout circuitry - designed for simpler, cost-sensitive flash-only implementations. | Choose MAX8630YETA+ for basic flash-only systems where adaptive gain and multi-mode logic control are unnecessary; verify thermal margin with exposed-pad layout. |
Compared with LM2758TLX/NOPB, LM3644YFFR adds digital control and dual-channel capability at the cost of increased BOM complexity and non-pin-compatible packaging, while MAX8630YETA+ simplifies design with fixed-gain operation but sacrifices adaptive efficiency and safety features like flash timeout.
Availability
LM2758TLX/NOPB is available at Aetrix Electronics and suitable for smartphone camera modules, digital still camera auxiliary lighting, tablet front-facing flash systems, and wearable imaging devices requiring stable component supply and long-term production continuity.
Supply support for LM2758TLX/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 IC design.
The LM2758TLX/NOPB belongs to TI's portable LED driver product line, engineered specifically for ultra-compact, high-efficiency flash illumination in battery-powered imaging devices where board space and thermal performance are critical constraints.
FAQ
What is the maximum LED current supported by the LM2758TLX/NOPB?
The LM2758TLX/NOPB supports up to 700 mA in flash mode and 500 mA in torch mode, with current set by an external RSET resistor connected to the ISET pin. At RSET = 20 kΩ, typical flash current is 500 mA and torch current is 107 mA; reducing RSET increases current proportionally, but thermal limits constrain continuous operation above 500 mA.
How does the LM2758TLX/NOPB select between 1× and 1.5× charge pump gain?
The LM2758TLX/NOPB monitors headroom voltage (VLED–) at the LED− pin and transitions from 1× to 1.5× gain when VLED– drops below 300 mV (typical). This occurs when LED forward voltage approaches or exceeds the available input voltage headroom, ensuring regulation is maintained without manual configuration.
What protection features are built into the LM2758TLX/NOPB?
The LM2758TLX/NOPB integrates flash timeout (814 ms typical), thermal shutdown (150°C typical), overcurrent limiting (1.2 A typical), and internal soft-start. These operate autonomously without external components, safeguarding both the IC and connected LED under fault conditions such as shorted LED or prolonged activation.
Can the LM2758TLX/NOPB drive multiple LEDs simultaneously?
The LM2758TLX/NOPB is designed to drive a single high-current flash LED via its dedicated current-sink output (LED−) and regulated output (CPOUT). Driving multiple LEDs in parallel is not recommended due to mismatched forward voltages causing current imbalance; series connection exceeds CPOUT voltage capability in 1× mode and risks exceeding 4.7 V limit in 1.5× mode.
What capacitor types are recommended for use with the LM2758TLX/NOPB?
LM2758TLX/NOPB requires X5R or X7R multilayer ceramic capacitors (MLCCs) with ≤20-mΩ ESR: 2.2 µF for CIN/COUT (6.3 V rating), and 1 µF for C1/C2 (6.3 V rating). Y5V/Z5U ceramics are excluded due to excessive capacitance drift; tantalum, aluminum electrolytic, and OS-CON capacitors are incompatible due to high ESR.
LM2758TLX/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
LM2758TLX/NOPB FAQ
1.How can I place an order for LM2758TLX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2758TLX/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 LM2758TLX/NOPB reliable?
The price and inventory of LM2758TLX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2758TLX/NOPB is usually 5 days.
3.What payment methods are accepted for LM2758TLX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2758TLX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2758TLX/NOPB?
LM2758TLX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2758TLX/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 LM2758TLX/NOPB?
For technical support, including LM2758TLX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2758TLX/NOPB requirements.
6.How does Aetrix verify that LM2758TLX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2758TLX/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 LM2758TLX/NOPB meets industry standards.
7.What is the process for return or replacement of LM2758TLX/NOPB?
All LM2758TLX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2758TLX/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 LM2758TLX/NOPB part is unused and in its original packaging.
Return procedure for LM2758TLX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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