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Texas Instruments LM3530TME-40/NOPB
- Part No.:
- LM3530TME-40/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 12-WFBGA, DSBGA
- Datasheet:
-
LM3530TME-40/NOPB.pdf
- Description:
- IC LED DRV RGLTR PWM 12DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:500
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Product details
Overview
LM3530TME-40/NOPB from Texas Instruments is a high-efficiency white-LED driver IC with programmable ambient light sensing, I²C-compatible interface, and 40-V overvoltage protection. It delivers up to 29.5 mA LED current across 2–11 series LEDs, supports dual ALS inputs (ALS1/ALS2), and operates from 2.7 V to 5.5 V input - designed for smartphone LCD backlighting with content-adjusted brightness control.
For engineers reviewing the LM3530TME-40/NOPB datasheet, LM3530TME-40/NOPB pinout, LM3530TME-40/NOPB application, or LM3530TME-40/NOPB equivalent, key selection considerations include its 1000:1 dimming ratio, 500-kHz fixed-frequency boost architecture, true shutdown isolation, programmable logarithmic/linear brightness control, and dual ALS voltage-setting resistor configuration for ambient-adaptive display power management.
Technical Context
The LM3530TME-40/NOPB integrates an asynchronous current-mode boost converter with regulated current sink (ILED = 0–29.5 mA) and dual analog ALS inputs supporting zone-based adaptive brightness. Its 500-kHz switching frequency enables compact inductor sizing while maintaining >90% efficiency across 2–11 LED strings.
It implements a 5-zone ambient light discrimination algorithm using programmable boundary registers (ZB0–ZB3) and target registers (Z0T–Z4T), with configurable averaging time (8 options) and internal ALS pull-down resistors (15 selectable values per input). The device uses I²C (0x38 address) for register access and supports external PWM brightness control via dedicated PWM pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 5.5 V - powers directly from single-cell Li-ion or USB-supplied rails without LDO pre-regulation. |
| Max Output Voltage | 40 V - supports up to 11 white LEDs in series (typ. 3.4 V each) with margin for thermal and forward-voltage variation. | LED Current Range | 0 mA to 29.5 mA in 127 steps - enables fine-grained brightness control with 1000:1 dimming ratio for perceptual uniformity. |
| Switching Frequency | 500 kHz ±10% - balances EMI, efficiency, and inductor size; fixed-frequency operation simplifies filtering. |
| Peak Switch Current | 839 mA (typ.) - sets inductor saturation margin and defines maximum output power capability at low VIN. |
| ALS Inputs | ALS1 & ALS2 with 15 programmable internal pull-down resistors (0.629 kΩ to 1.202 kΩ) - enables direct interface with diverse analog ambient light sensors without external components. |
| I²C Address | 0x38 - standard 7-bit slave address; compatible with multi-device I²C buses in mobile SoC designs. |
Pinout & Package
LM3530TME-40/NOPB is housed in a 12-pin DSBGA package (YFQ/YFZ), measuring 1.64 mm × 1.24 mm with 0.4-mm pitch. This ultra-compact wafer-level chip-scale package supports high-density mobile PCB layouts and requires controlled-impedance routing for SW and OVP nodes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 SDA | I²C data line | Open-drain bidirectional serial data interface; requires external pull-up to VLOGIC (typically 1.8 V or 3.3 V). |
| A2 SCL | I²C clock line | Input-only clock signal; timing compliant with standard-mode I²C (max 400 kHz) and fast-mode (1 MHz) per spec. |
| A3 SW | Boost switch node | Connection point for inductor and Schottky diode anode; high dv/dt node requiring minimized trace length and ground shielding. |
| B1 PWM | External brightness control | Logic-level enable/disable input; supports simple on/off or PWM-dimming with 1.5–2.6 ms enable/disable timing windows. |
| B2 INT | ALS zone change interrupt | Open-drain output signaling ambient light zone transition; used to trigger host processor backlight reconfiguration. |
| B3 GND | Power and signal reference | Dedicated ground plane connection; must be tied to system ground with low-inductance path to minimize noise coupling. |
| C1 ALS2 | Ambient light sensor input 2 | Analog input with software-selectable internal pull-down resistor; accepts 0–1 V ALS voltage for zone mapping. |
| C2 HWEN | Hardware enable/reset | Active-high enable; pulling low forces full shutdown with <2 µA quiescent current and true isolation of LEDs and ALS inputs. |
| C3 IN | Main power input | 2.7–5.5 V supply input; requires ≥2.2 µF ceramic bypass capacitor placed adjacent to pin for stability. |
| D1 ALS1 | Ambient light sensor input 1 | Primary ALS input with independent resistor selection; supports averaging or selection logic with ALS2 via register control. |
| D2 OVP | Output overvoltage sense | Feedback node connected to cathode of output capacitor; triggers shutdown if output exceeds 40 V (±1 V tolerance). |
| D3 ILED | Current sink output | Regulated current sink terminal; internal amplifier maintains 400 mV across external sense resistor to set LED current. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable dual ALS inputs | Independent resistor selection (15 values each) and zone-based mapping enable seamless integration with APDS-9005, OPT3001, or custom photodiode circuits. |
| True shutdown isolation | HWEN = low disconnects both LED current path and ALS inputs from bias, reducing system leakage to <2 µA - critical for battery standby. |
| I²C + PWM dual control | Full register access via I²C (0x38) plus hardware PWM pin allows hybrid control: firmware-driven adaptive dimming with real-time override capability. |
| Internal soft-start | 3-ms ramp of input current limits inrush during power-on, preventing brownout in shared rail systems and eliminating need for external soft-start circuitry. |
| Content-adjusted backlighting | 5-zone ALS response with programmable targets (Z0T–Z4T) dynamically scales LED current to preserve image contrast and extend battery life without perceptible flicker. |
Applications
| Smartphone LCD Backlighting | Personal Navigation Device (PND) Display |
|---|---|
Use Scenario: Adaptive brightness control in handheld smartphones under varying ambient lighting (indoor, outdoor, low-light). IC Role / Device Role / Timing Role: White-LED driver with ambient light sensing and I²C-controlled current regulation - manages backlight intensity in real time based on ALS1/ALS2 inputs. Use Value: Extends battery runtime by up to 30% versus fixed-brightness schemes while maintaining visual comfort and display readability across 0.1–10,000 lux conditions. | Use Scenario: Sunlight-readable display in automotive-grade portable navigation units exposed to rapid ambient transitions (tunnel exit, shade-to-sun). IC Role / Device Role / Timing Role: High-efficiency boost LED driver with 40-V OVP and dual ALS inputs - provides robust backlight power and ambient-responsive dimming without microcontroller intervention. Use Value: Eliminates manual brightness adjustment; maintains optimal contrast ratio through programmable zone boundaries (ZB0–ZB3) and smooth ramp transitions (8–32.768 ms step times). |
| 2–11 Series White-LED Backlit Display Power Source | Tablet PC Frontlight Management |
Use Scenario: Powering multi-LED string displays in industrial HMIs, medical monitors, and retail kiosks with wide temperature range (−40°C to +85°C). IC Role / Device Role / Timing Role: Current-mode boost controller with 839-mA peak switch limit and 90% efficiency - delivers stable LED current across input voltage sag and LED Vf drift. Use Value: Enables single-chip solution for 2–11 LED strings without external current-setting resistors or compensation networks, reducing BOM count and layout area. | Use Scenario: Dynamic frontlight control in e-readers and convertible tablets where ambient light affects perceived text contrast and eye fatigue. IC Role / Device Role / Timing Role: Ambient-adaptive LED driver with logarithmic/linear brightness mapping and interrupt-driven zone updates - synchronizes backlight level with content type (text vs. image) and ambient condition. Use Value: Reduces eye strain via gradual 16.384-ms ramp steps and preserves battery life using ALS-triggered low-power zones - validated over 100,000+ charge cycles in field deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white-LED driver with ambient light sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3530UME-40 | Same die, 12-pin DSBGA (YFZ), identical electrical specs and pinout - differs only in tape-and-reel packaging (UM vs TM suffix) and RoHS compliance marking. | No functional difference; intended for automated SMT assembly with different reel orientation and moisture sensitivity level (MSL 1). | Select LM3530UME-40 for high-volume pick-and-place production; LM3530TME-40/NOPB is preferred for prototyping and low-volume evaluation due to tube packaging and NOPB marking. |
| AL8862SP-7 | Asynchronous boost LED driver with single ALS input, 30-V OVP, and no I²C interface - uses analog dimming and fixed internal ALS thresholds instead of programmable zones. | Lacks dual ALS inputs, zone-based mapping, and register-level control; suited for cost-sensitive designs where adaptive granularity is not required. | Choose AL8862SP-7 only when I²C bus resources are constrained and ambient response can be simplified to two-step (indoor/outdoor) logic. |
Compared with LM3530UME-40, the LM3530TME-40/NOPB offers identical performance but prioritizes ease of handling and traceability for design-in validation; versus AL8862SP-7, it delivers superior ambient adaptability through programmable 5-zone ALS response and I²C-configurable ramp rates - essential for premium mobile display systems.
Availability
LM3530TME-40/NOPB is available at Aetrix Electronics and suitable for smartphone LCD backlighting, personal navigation device (PND) displays, and 2–11 series white-LED backlit display power applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for LM3530TME-40/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 solutions, with leadership in power management, signal chain, and interface technologies for industrial, automotive, and consumer markets.
The LM3530TME-40/NOPB belongs to TI's LED backlight driver product line, engineered specifically for adaptive display power in space-constrained portable electronics - emphasizing high efficiency, ambient intelligence, and seamless integration with mobile application processors.
FAQ
What is the I²C address of the LM3530TME-40/NOPB?
The LM3530TME-40/NOPB uses a fixed 7-bit I²C slave address of 0x38, as confirmed in the "I2C Device Options" section of the SNVS606L datasheet. This address applies to all LM3530 variants ending in "-40", including LM3530TME-40/NOPB. No address pins or hardware strapping options exist - communication is initiated solely via this hardwired address on the SDA/SCL bus.
Does the LM3530TME-40/NOPB support true shutdown with zero current draw?
Yes, the LM3530TME-40/NOPB achieves true shutdown isolation when HWEN is pulled low: LED current drops to 0 mA, ALS1/ALS2 inputs become high-impedance (<100 nA leakage), and total supply current falls to 1–2 µA. This state is explicitly verified in Section 7.5 (Electrical Characteristics) of the datasheet under ISHDN, confirming full functional disablement - critical for battery-powered standby modes.
How does the LM3530TME-40/NOPB handle ambient light sensor inputs ALS1 and ALS2?
The LM3530TME-40/NOPB supports three ALS input modes via register bits [6:5]: use ALS1 only, ALS2 only, or average of both. Each input features 15 software-selectable internal pull-down resistors (0.629 kΩ to 1.202 kΩ), enabling direct compatibility with common analog ALS outputs (e.g., APDS-9005). The ALS voltage range is 0–1 V, mapped to five programmable brightness zones with hysteresis to prevent oscillation.
What is the maximum number of white LEDs the LM3530TME-40/NOPB can drive in series?
The LM3530TME-40/NOPB supports up to 11 white LEDs in series, enabled by its 40-V maximum output voltage rating and internal current regulation. At typical forward voltage of 3.4 V per LED, 11 LEDs require ~37.4 V - within the 40-V OVP threshold. The device regulates ILED precisely from 0 to 29.5 mA regardless of string count, provided input voltage remains ≥2.7 V and inductor/switch ratings are respected.
Can the LM3530TME-40/NOPB operate without I²C configuration?
Yes, the LM3530TME-40/NOPB functions with default settings upon power-up: full-scale LED current = 19 mA, linear brightness mode, ALS disabled, and PWM control active. These defaults allow immediate operation using only HWEN and PWM signals - I²C is optional for advanced features like zone-based ALS, logarithmic dimming, or ramp rate tuning. All critical parameters remain functional without register writes.
LM3530TME-40/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:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 2.7V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 40V
- Current - Output / Channel:
- 30mA
- Frequency:
- 500kHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-DSBGA
LM3530TME-40/NOPB FAQ
1.How can I place an order for LM3530TME-40/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3530TME-40/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 LM3530TME-40/NOPB reliable?
The price and inventory of LM3530TME-40/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3530TME-40/NOPB is usually 5 days.
3.What payment methods are accepted for LM3530TME-40/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3530TME-40/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3530TME-40/NOPB?
LM3530TME-40/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3530TME-40/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 LM3530TME-40/NOPB?
For technical support, including LM3530TME-40/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3530TME-40/NOPB requirements.
6.How does Aetrix verify that LM3530TME-40/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3530TME-40/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 LM3530TME-40/NOPB meets industry standards.
7.What is the process for return or replacement of LM3530TME-40/NOPB?
All LM3530TME-40/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3530TME-40/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 LM3530TME-40/NOPB part is unused and in its original packaging.
Return procedure for LM3530TME-40/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM3530TME-40/NOPB Tags
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