My Inquiry
My Account
Texas Instruments LM2754SQX/NOPB
- Part No.:
- LM2754SQX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
LM2754SQX/NOPB.pdf
- Description:
- IC LED DRIVER RGLTR 200MA 24WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,523
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM2754SQX/NOPB from Texas Instruments is a switched-capacitor flash LED driver IC optimized for parallel white LED driving in mobile camera modules. It delivers up to 800 mA total output current across four regulated current sinks, supports adaptive 1x/1.5x/2x charge pump gain selection, operates from 2.8 V to 5.5 V input, and integrates time-out protection and RF PA synchronization via TX pin - enabling reliable flash operation in smartphone front/rear camera systems.
For engineers reviewing the LM2754SQX/NOPB datasheet, LM2754SQX/NOPB pinout, LM2754SQX/NOPB application, or LM2754SQX/NOPB equivalent, key selection criteria include its 24-pin WQFN package thermal performance (θJA = 42°C/W), 1 MHz fixed switching frequency, <1 µA shutdown current, true output disconnect during shutdown, and dual ISET resistor programming for independent torch (≤100 mA/sink) and flash (≤200 mA/sink) current control.
Technical Context
The LM2754SQX/NOPB implements an adaptive CMOS charge pump with closed-loop regulation that dynamically selects 1x, 1.5x, or 2x gain based on LED forward voltage and load demand - transitioning in ≤2 ms during flash mode. Its four independent current sinks (D1–D4) each regulate sink current with ≤11.5% error over temperature, requiring only two external 1% resistors (RSET1, RSET2) referenced to 1.244 V internal reference.
Logic control is managed through five dedicated pins: EN (master enable), T/F (torch/flash mode select), TX (RF PA sync override), SEL (D4 disable), and GNDSW/VINSW (switch array ground/input). All logic inputs feature internal 500 kΩ pull-downs and operate at standard 1.2 V/0.4 V VIH/VIL thresholds, supporting direct interface with baseband processors without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Up to 800 mA total (200 mA per sink in Flash mode; 100 mA per sink in Torch mode) |
| Input Voltage Range | 2.8 V to 5.5 V - supports single-cell Li-ion and Li-poly battery operation without pre-regulation |
| Charge Pump Gain | Adaptive 1x/1.5x/2x - automatically selects minimum gain needed to maintain LED regulation |
| Switching Frequency | 1 MHz ±30% - enables use of small 2.2 µF ceramic flying capacitors and reduces EMI filtering burden |
| Shutdown Current | <1 µA - ensures negligible battery drain during standby in always-on camera subsystems |
| Headroom Voltage | 150 mV (at 50 mA) to 550 mV (at 200 mA) - defines minimum VOUT–VDx margin required for accurate current regulation |
| Thermal Resistance | θJA = 42°C/W - requires PCB thermal land under DAP and vias to ground plane for sustained 800 mA operation |
Pinout & Package
LM2754SQX/NOPB uses a thermally enhanced 24-pin WQFN package (4 mm × 4 mm × 0.8 mm, package code RTW0024A) with exposed die attach pad (DAP) for low-thermal-resistance PCB mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN, VINSW (Pins 22, 23, 24) | Input power supply connection | Must be shorted externally; supplies charge pump input and internal bias rails |
| VOUT (Pin 8) | Regulated output node | Connects to LED anodes; voltage loosely regulated to 4.7 V (1x/1.5x) or 5.1 V (2x) under no-load |
| D1–D4 (Pins 12–15) | LED current sink terminals | Each sinks programmed current to GND; SEL pin disables D4 for 3-LED modules |
| ISET1/ISET2 (Pins 10, 11) | Current set reference inputs | Accept 1% resistors to GND; set torch (ISET1) and flash (ISET2) currents via 800×(1.25 V/R) equation |
| EN (Pin 21) | Master enable control | Logic high enables device; logic low shuts down all circuitry and disconnects VOUT from VIN |
| T/F (Pin 20) | Torch/Flash mode selector | High = Flash mode (RSET2); Low = Torch mode (RSET1); timeout disables sinks after >1 s high |
| TX (Pin 19) | RF PA synchronization input | High forces immediate switch to torch current during RF transmission pulses - prevents battery droop |
| SEL (Pin 18) | D4 disable control | High disables D4 sink; allows 3-LED flash modules while retaining per-sink current limits |
| GND, GNDSW (Pins 3, 9, 16, 17) | Ground return paths | All must be connected to common system ground; GNDSW is dedicated to switch array return |
Key Features
| Feature | Design Value |
|---|---|
| No-inductor architecture | Eliminates magnetic EMI, board space, and cost of inductors - uses only four MLCCs (CIN, COUT, C1, C2) |
| True output disconnect | VOUT is actively isolated from VIN during shutdown - prevents backfeed into flash LEDs or battery leakage |
| Internal soft-start | Controls reference turn-on rate to limit inrush current during EN assertion - avoids input rail collapse |
| Time-out protection | Automatically disables current sinks after 1 s of continuous Flash mode - prevents thermal runaway and LED damage |
| Adaptive gain selection | Minimizes power loss by selecting lowest possible charge pump gain (1x → 1.5x → 2x) needed for LED forward voltage |
Applications
| Smartphone Camera Flash | Digital Still Camera Module |
|---|---|
Use Scenario: Front- and rear-facing camera modules in 4G/5G smartphones requiring synchronized flash illumination during video capture or still image capture. IC Role / Device Role / Timing Role: Primary flash LED driver delivering 800 mA peak current with RF PA pulse synchronization via TX pin to avoid battery voltage sag. Use Value: Enables bright, consistent flash illumination without compromising cellular transmission integrity or battery runtime. | Use Scenario: Compact digital cameras with multi-LED flash arrays needing programmable torch and flash modes for preview and capture. IC Role / Device Role / Timing Role: Constant-current sink controller with adaptive charge pump gain and 1-second flash timeout for safe high-current operation. Use Value: Delivers stable LED brightness across varying battery voltage (2.8–5.5 V) and eliminates need for discrete gain-switching circuitry. |
| Portable Media Player Lighting | DSP/Microprocessor Power Supply |
Use Scenario: Backlighting or status lighting in MP3 players and portable gaming devices where space and efficiency are critical. IC Role / Device Role / Timing Role: Torch-mode LED driver supplying up to 400 mA (4 × 100 mA) with <1 µA shutdown current for ultra-low-power standby. Use Value: Extends battery life between charges while maintaining instant-on lighting response and minimal PCB footprint (<28 mm² total solution size). | Use Scenario: Low-noise auxiliary supply for DSP cores or memory interfaces requiring clean, regulated voltage without inductor-induced ripple. IC Role / Device Role / Timing Role: Switched-capacitor DC/DC converter generating stable 4.7–5.1 V output with 0.25–1.5 Ω output impedance across gain modes. Use Value: Provides low-EMI, high-efficiency voltage boosting for noise-sensitive analog/digital circuits - no magnetic coupling or layout sensitivity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switched-capacitor LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3530TMX/NOPB | Supports I²C programmability and 6-channel current control; lacks TX sync pin and flash timeout; max 30 mA/channel | Targeted at RGB ambient lighting and display backlight dimming - not flash-rated | Select LM3530TMX/NOPB only for multi-color, software-controlled lighting - not for high-current flash applications. |
| TPS68470RWER | Higher integration: includes PMIC functions, 12-bit DAC, and I²C interface; 600 mA max flash current; no SEL pin for D4 disable | Designed for full-system power management in modern smartphones - adds complexity beyond standalone flash driving | Choose TPS68470RWER when consolidating LED driver with system PMIC; retain LM2754SQX/NOPB for cost-optimized, dedicated flash solutions. |
Compared with LM3530TMX/NOPB and TPS68470RWER, LM2754SQX/NOPB provides superior flash-specific features - including hardware-based TX synchronization, 1-second flash timeout, and 200 mA/sink capability - in a minimal BOM, pin-strapped configuration ideal for volume camera module designs.
Availability
LM2754SQX/NOPB is available at Aetrix Electronics and suitable for smartphone camera modules, digital camera flash subsystems, and portable media player lighting requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LM2754SQX/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 portable power and LED driver innovation.
The LM2754SQX/NOPB belongs to TI's high-efficiency switched-capacitor LED driver product line, engineered specifically for space-constrained, battery-powered camera flash applications demanding precise current regulation and RF coexistence.
FAQ
What is the maximum total LED current supported by the LM2754SQX/NOPB?
The LM2754SQX/NOPB supports up to 800 mA total output current when all four current sinks (D1–D4) are active in Flash mode, with a maximum of 200 mA per sink. In Torch mode, the maximum is 400 mA total (100 mA per sink). Exceeding these limits risks thermal shutdown or degraded current regulation accuracy due to headroom voltage constraints.
How does the TX pin function in the LM2754SQX/NOPB during RF transmission?
The TX pin on the LM2754SQX/NOPB forces an immediate transition from Flash mode to Torch mode current levels during RF power amplifier pulses. When TX is driven high, the device sources only the RSET1-programmed current - reducing battery load and preventing voltage droop that could disrupt cellular transmission. Current reverts to Flash level when TX returns low.
Can the LM2754SQX/NOPB drive fewer than four LEDs, and how is this configured?
Yes - the LM2754SQX/NOPB supports 1-, 2-, 3-, or 4-LED configurations. To disable D4 for 3-LED modules, assert logic high on the SEL pin. D4 must then be connected to VOUT. The remaining sinks (D1–D3) retain full 200 mA/sink capability in Flash mode, enabling up to 600 mA total drive current with identical regulation performance.
What capacitor types are recommended for use with the LM2754SQX/NOPB, and why?
Only X5R or X7R multilayer ceramic capacitors (MLCCs) are recommended for CIN, COUT, C1, and C2 in the LM2754SQX/NOPB. These offer low ESR (<20 mΩ), tight tolerance (±10%), and stable capacitance over temperature. Y5V/Z5U types are prohibited due to severe capacitance loss (>80%) at bias and temperature extremes - risking charge pump instability and LED current drift.
Does the LM2754SQX/NOPB require external compensation components?
No - the LM2754SQX/NOPB uses fully internal compensation. Its adaptive charge pump control loop and current sink regulation are factory-trimmed and do not require external resistors, capacitors, or feedback networks. System stability is ensured solely by proper placement and selection of the four external MLCCs per the datasheet layout guidelines.
LM2754SQX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- DC DC Regulator
- Topology:
- Switched Capacitor (Charge Pump)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 4
- Voltage - Supply (Min):
- 2.8V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 4.7V ~ 5.1V
- Current - Output / Channel:
- 200mA (Flash)
- Frequency:
- 1MHz
- Dimming:
- -
- Applications:
- Camera Flash
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-WQFN (4x4)
LM2754SQX/NOPB FAQ
1.How can I place an order for LM2754SQX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2754SQX/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 LM2754SQX/NOPB reliable?
The price and inventory of LM2754SQX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2754SQX/NOPB is usually 5 days.
3.What payment methods are accepted for LM2754SQX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2754SQX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2754SQX/NOPB?
LM2754SQX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2754SQX/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 LM2754SQX/NOPB?
For technical support, including LM2754SQX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2754SQX/NOPB requirements.
6.How does Aetrix verify that LM2754SQX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2754SQX/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 LM2754SQX/NOPB meets industry standards.
7.What is the process for return or replacement of LM2754SQX/NOPB?
All LM2754SQX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2754SQX/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 LM2754SQX/NOPB part is unused and in its original packaging.
Return procedure for LM2754SQX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2754SQX/NOPB Tags
-
BCR402RE6327HTSA1
Infineon Technologies
-
BCR430UXTSA2
Infineon Technologies
-
BCR420UE6433HTMA1
Infineon Technologies
-
BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
