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Texas Instruments LM3535TME/NOPB
- Part No.:
- LM3535TME/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 20-WFBGA, DSBGA
- Datasheet:
-
LM3535TME/NOPB.pdf
- Description:
- IC LED DRV RGLTR PWM 20DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:495
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Product details
Overview
LM3535TME/NOPB from Texas Instruments is a multi-display white LED driver IC with integrated ambient light sensing and dynamic backlight control. It drives up to 8 LEDs across three independently controlled groups (Group A: up to 6 LEDs; Group B: up to 3; Group C: 1), delivers 25 mA per channel, supports I²C interface and external PWM input, and operates from 2.7 V to 5.5 V - used in smartphone display backlighting with adaptive brightness.
For engineers reviewing the LM3535TME/NOPB datasheet, LM3535TME/NOPB pinout, LM3535TME/NOPB application, or LM3535TME/NOPB equivalent, key selection criteria include group-wise current sink independence, 128-step exponential dimming for Group A, ALS interrupt reporting, charge pump gain switching (1×/3/2×), and DSBGA-20 package compatibility with space-constrained mobile designs.
Technical Context
The LM3535TME/NOPB implements an adaptive CMOS charge pump with automatic 1×/3/2× gain selection based on real-time LED forward voltage monitoring - triggered when any active Dxx pin headroom drops below ~130 mV. It uses internal mismatch cancellation circuitry to achieve 0.55% typical current matching across Group A's six sinks.
Its I²C-compatible interface (7-bit address 0x38) configures brightness registers, ALS zone thresholds, and functional modes; the D1B/INT pin serves dual role as Group B current sink output or ALS interrupt signal, while D1C/ALS accepts photodiode input for five-level ambient-adaptive backlight control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LED drive capability | Drives up to 8 LEDs: Group A (6), Group B (3), Group C (1), each at 25 mA nominal current |
| Dimming resolution | 128 exponential steps (600:1 ratio) for Group A; 8 linear steps for Groups B & C |
| Input voltage range | 2.7 V to 5.5 V - compatible with single-cell Li-ion and USB-powered systems |
| Current matching accuracy | 0.55% typical (worst-case 2.78%) across Group A - ensures uniform display luminance |
| Charge pump efficiency | Up to 90% - achieved via adaptive 1×/3/2× gain selection without inductor |
| ALS functionality | Multi-zone ambient light sensing with four adjustable trip points and interrupt reporting on D1B/INT |
| Quiescent current | 1.09 mA (1× mode) / 2.86 mA (3/2× mode) - enables low-power display operation |
Pinout & Package
LM3535TME/NOPB uses a 20-pin DSBGA (YFQ) package measuring 2.045 mm × 1.64 mm with 0.4-mm pitch - optimized for ultra-thin mobile PCBs and thermal performance (RθJA = 70.5°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1, C1, B1, B2 (C1+, C1−, C2+, C2−) |
Flying capacitor connections | Interface external 1 µF ceramic capacitors for charge pump operation in 1× or 3/2× gain modes |
| A2 (VOUT) | Charge pump regulated output | Delivers up to 200 mA total current; voltage tracks VIN in 1× mode or regulates to ~4.3 V in 3/2× mode |
| A3 (VIN) | Main power input | Accepts 2.7–5.5 V supply; powers internal circuitry and charge pump input |
| A4, D1 (GND) | Power ground | Dual GND pins reduce impedance and improve current sink stability and EMI performance |
| B3 (D1B/INT) | Group B sink / ALS interrupt | Configurable: drives one Group B LED or reports ALS event (open-drain, requires pullup) |
| B4, C4 (D53, D62) | Configurable current sinks | Assignable to Group A or Group B - expands flexibility for mixed display + indicator configurations |
| C2 (SDIO) | I²C data I/O | Bi-directional serial interface pin (7-bit address 0x38); supports standard-mode I²C timing |
| C3 (D1C/ALS) | Indicator sink / ALS input | Drives single indicator LED or accepts photodiode anode for ambient light measurement |
| D2 (PWM) | Dynamic backlight control input | External PWM signal (min. 15 µs pulse width) modulates all enabled current sinks for content-aware dimming |
| E1 (HWEN) | Hardware enable/reset | Active-high logic: high = normal operation; low = full reset and shutdown (IQ = 1.7 µA) |
| E2 (SCL) | I²C clock input | Controls serial data timing; supports up to 400 kHz standard-mode I²C communication |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive charge pump gain | Automatically switches between 1× (pass-through) and 3/2× (boost) based on real-time LED headroom - maximizes efficiency across input and load variations |
| Independent group control | Three isolated current sink groups (A/B/C) allow simultaneous main display, secondary display, and status indicator lighting with separate dimming and enable states |
| ALS with interrupt reporting | Four programmable ambient light zone boundaries trigger D1B/INT pin low to alert host MCU - eliminates polling and reduces system latency |
| Exponential dimming (Group A) | 128-step logarithmic brightness curve matches human eye perception - enables smooth, flicker-free backlight transitions over 600:1 range |
| Total solution size | <16 mm² footprint including all required 1 µF ceramic capacitors - meets stringent space constraints in modern smartphones |
Applications
| Smartphone Main Display Backlight | Secondary Display & Keypad Lighting |
|---|---|
|
Use Scenario: Driving 4–6 white LEDs behind an AMOLED or LCD main screen in compact handheld devices. IC Role / Device Role / Timing Role: Primary LED driver providing regulated 25 mA per channel with exponential dimming and ALS-based auto-brightness. Use Value: Enables seamless brightness adaptation across ambient conditions while maintaining uniform luminance and minimizing power draw via adaptive charge pump gain. |
Use Scenario: Illuminating auxiliary displays (e.g., cover screens), keypads, or notification indicators in dual-display mobile platforms. IC Role / Device Role / Timing Role: Secondary current sink controller (Group B/C) delivering independent linear dimming and on/off control for non-primary lighting zones. Use Value: Eliminates need for additional LED drivers - reduces BOM count and PCB area by consolidating main + auxiliary lighting into single IC. |
| Dynamic Content-Aware Backlighting | ALS-Driven Power-Optimized UI |
|
Use Scenario: Synchronizing LED intensity with video frame content using external PWM from display processor (DBC/CABC). IC Role / Device Role / Timing Role: PWM-gated current sink enabling real-time backlight modulation - responds within 15 µs to incoming PWM edges. Use Value: Reduces display power consumption up to 30% during dark-content playback without perceptible flicker or latency. |
Use Scenario: Automatically adjusting backlight brightness in response to ambient light changes detected by integrated photodiode interface. IC Role / Device Role / Timing Role: Ambient light sensor front-end with programmable trip thresholds and interrupt-driven host notification. Use Value: Lowers average system power by eliminating constant MCU polling and enabling rapid, event-triggered brightness updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3530TME/NOPB | Same DSBGA-20 package and I²C interface, but supports only 6 LEDs (Group A only), no Group B/C sinks or ALS input | Limited to single-display systems without indicator or secondary lighting requirements | Select when design uses only main display LEDs and requires smaller register map or lower cost |
| TPS61165RTVR | Boost converter-based driver; fixed 30-mA per channel; no ALS, no PWM input, no multi-group control | Suitable for basic backlighting without ambient adaptation or dynamic content control | Choose for higher-current (30 mA) single-group applications where charge pump topology is not required |
Compared with LM3535TME/NOPB, LM3530TME/NOPB omits ALS, Group B/C sinks, and PWM input - reducing feature set but simplifying configuration; TPS61165RTVR trades integrated ambient and group control for higher per-channel current and boost architecture - better for high-Vf LEDs but less flexible in adaptive mobile UIs.
Availability
LM3535TME/NOPB is available at Aetrix Electronics and suitable for smartphone display backlighting, secondary display illumination, and ambient-adaptive UI lighting requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LM3535TME/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 - serving automotive, industrial, communications, and consumer markets with high-reliability silicon solutions.
The LM3535TME/NOPB belongs to TI's precision LED driver product line, designed specifically for space-constrained, power-sensitive mobile displays requiring adaptive brightness, multi-zone control, and minimal external components.
FAQ
What is the maximum number of LEDs the LM3535TME/NOPB can drive simultaneously?
The LM3535TME/NOPB can drive up to 8 LEDs concurrently: Group A supports up to 6 LEDs, Group B up to 3, and Group C 1 LED. All groups operate independently, allowing partial illumination - for example, activating only 4 Group A LEDs for reduced-power mode while keeping Group C's indicator active. Total output current capacity is 200 mA.
Does the LM3535TME/NOPB require external inductors for operation?
No, the LM3535TME/NOPB uses an inductorless switched-capacitor (charge pump) architecture with selectable 1× and 3/2× gain modes. It relies solely on four external 1 µF ceramic flying/output capacitors (C1+, C1−, C2+, C2−, CIN, COUT) - eliminating magnetic components, reducing EMI, and enabling ultra-low-profile designs ideal for smartphones.
How does ambient light sensing work on the LM3535TME/NOPB?
The LM3535TME/NOPB implements ambient light sensing via its D1C/ALS pin, which accepts a photodiode anode connection. Internal circuitry compares the resulting current against four user-programmable threshold voltages, triggering an interrupt on D1B/INT when crossing boundaries. This enables autonomous, event-driven backlight adjustment without continuous MCU polling.
What is the minimum pulse width supported on the PWM input of the LM3535TME/NOPB?
The LM3535TME/NOPB requires a minimum PWM pulse width of 15 µs to reliably transition current sinks between on/off states. This specification is defined by internal settling time - the device reaches 90% of target current within this window. Using shorter pulses may result in incomplete dimming steps or inconsistent brightness levels across LED groups.
Is the LM3535TME/NOPB pin-compatible with other members of the LM353x family?
No - the LM3535TME/NOPB is not pin-compatible with LM3530TME/NOPB or LM3532TME/NOPB. While all share the same 20-pin DSBGA (YFQ) package outline, pin functions differ significantly: LM3530 lacks D1C/ALS and D1B/INT dual-function capability, and LM3532 reassigns several control pins for different register mapping and feature sets. PCB layout must be specific to LM3535TME/NOPB.
LM3535TME/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-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:
- 8
- Voltage - Supply (Min):
- 2.7V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 2V ~ 4V
- Current - Output / Channel:
- 25mA
- Frequency:
- 1.33MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -30°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-DSBGA
LM3535TME/NOPB FAQ
1.How can I place an order for LM3535TME/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3535TME/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 LM3535TME/NOPB reliable?
The price and inventory of LM3535TME/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3535TME/NOPB is usually 5 days.
3.What payment methods are accepted for LM3535TME/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3535TME/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3535TME/NOPB?
LM3535TME/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3535TME/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 LM3535TME/NOPB?
For technical support, including LM3535TME/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3535TME/NOPB requirements.
6.How does Aetrix verify that LM3535TME/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3535TME/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 LM3535TME/NOPB meets industry standards.
7.What is the process for return or replacement of LM3535TME/NOPB?
All LM3535TME/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3535TME/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 LM3535TME/NOPB part is unused and in its original packaging.
Return procedure for LM3535TME/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM3535TME/NOPB Tags
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