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Texas Instruments LM3559TLE/NOPB
- Part No.:
- LM3559TLE/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 16-WFBGA, DSBGA
- Datasheet:
-
LM3559TLE/NOPB.pdf
- Description:
- IC LED DRVR RGLTR I2C 16DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:459
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Product details
Overview
LM3559TLE/NOPB from Texas Instruments is a synchronous boost flash driver IC with dual 900-mA high-side current sources, delivering up to 1.8-A total flash current for white LED camera flash applications. It operates from 2.5 V to 5.5 V input, features 2-MHz fixed-frequency switching, integrated battery voltage sensing, and hardware flash/torch enable (STROBE/HWEN) for mobile phone imaging systems.
For engineers reviewing the LM3559TLE/NOPB datasheet, LM3559TLE/NOPB pinout, LM3559TLE/NOPB application, or LM3559TLE/NOPB equivalent, key selection considerations include programmable flash/torch current (28.125 mA–1.8 A), dual TX synchronization inputs for RF PA coordination, open/short LED fault detection, 4-bit VLED ADC monitoring, and thermal shutdown at 150°C.
Technical Context
The LM3559TLE/NOPB integrates a 2-MHz synchronous boost converter with adaptive regulation to maintain current source headroom ≥270 mV across LED1/LED2 while maximizing efficiency. Its dual high-side current sinks support grounded-cathode LED configuration and can be paralleled for 1.8-A single-LED flash operation.
Control is implemented via 400-kHz I²C interface with register-based programming of flash/torch brightness, indicator patterns, flash timeout, and current scale-back thresholds. Hardware pins-STROBE (active-high flash trigger), HWEN (active-high enable), TX1/TX2 (dual-polarity RF sync/interrupt)-enable real-time system-level coordination without processor intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 5.5 V - supports Li-ion battery operation across full discharge curve without external LDO. |
| Max Flash Current | 1.8 A total (900 mA per channel) - enables high-brightness camera flash with dual parallel LEDs or single high-power LED. |
| Switching Frequency | 2 MHz ±20% - allows use of ultra-small 1-µH inductors and 10-µF ceramic capacitors for <26 mm² total solution size. |
| Current Accuracy | ±4% over –40°C to +85°C at 900-mA setting - ensures consistent flash intensity across temperature and battery voltage. |
| OVP Threshold | 5.0 V ±75 mV - protects downstream circuitry by limiting output voltage during LED open-circuit or thermal foldback. |
| Quiescent Current | 650 µA (non-switching) - minimizes standby power draw in always-on camera subsystems. |
| I²C Interface | 400-kHz compatible - enables fast register access for dynamic brightness adjustment and fault status polling. |
Pinout & Package
The LM3559TLE/NOPB is housed in a 1.96 mm × 1.96 mm, 16-pin DSBGA (YZR) package optimized for space-constrained mobile camera modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LED1, LED2 | High-side current source outputs | Drive grounded-cathode flash LEDs; each supports up to 900 mA with independent programmability. |
| OUT | Boost converter output | Supplies regulated voltage to LED anodes; requires 10-µF ceramic capacitor to GND for stability. |
| SW | Internal switch node | Connects to 1-µH inductor; internal NMOS/PMOS synchronous rectification improves efficiency. |
| GND | Power ground | Common reference for all analog/digital circuits; multiple pins (A4, B4) reduce impedance and improve thermal dissipation. |
| LEDI/NTC | Configurable terminal | Either supplies indicator LED current (up to 18 mA) or reads NTC thermistor voltage for thermal interrupt generation. |
| STROBE | Hardware flash trigger | Active-high input with 300-kΩ internal pulldown; initiates flash pulse independently of I²C bus state. |
| HWEN | Hardware enable | Active-high logic input; pulling low forces immediate shutdown with <1 µA supply current for fail-safe operation. |
| TX1/TORCH/GPIO1 | Multi-function sync input | Configurable as RF PA sync (flash-to-torch transition), hardware torch enable, or GPIO; supports active-high/low polarity. |
| TX2/INT/GPIO2 | Multi-function sync/interrupt | Configurable as second RF sync input, thermal/LED-fault interrupt output, or general-purpose I/O. |
| SCL, SDA | I²C interface | Standard bidirectional serial interface for register read/write; high-impedance during shutdown. |
| IN | Input power supply | Accepts 2.5–5.5 V; bypassed with ≥10-µF ceramic capacitor to GND for low-ESR filtering. |
Key Features
| Feature | Design Value |
|---|---|
| Dual high-side current sources | Enables grounded-cathode LED layout - simplifies PCB routing and improves EMI performance in camera modules. |
| Programmable flash current scaling | Automatically reduces flash current when VIN drops below 2.9 V - maintains consistent exposure while preventing battery brownout. |
| Integrated 4-bit VLED ADC | Monitors LED forward voltage in real time - detects LED degradation, open/short faults, and supports closed-loop brightness calibration. |
| Dual TX synchronization inputs | Allows hardware-level coordination with RF power amplifier events - avoids flash-induced interference during cellular transmission. |
| Thermal and LED fault protection | Combines NTC thermistor comparator, open/short LED detection, and 150°C junction thermal shutdown - ensures safe operation under fault conditions. |
Applications
| Camera Phone Flash | Mobile Privacy Indicator |
|---|---|
Use Scenario: High-intensity illumination for smartphone rear/front cameras during low-light photography or video recording. IC Role / Device Role / Timing Role: Synchronous boost flash driver providing up to 1.8-A peak current with hardware-triggered STROBE timing and battery-aware current scaling. Use Value: Delivers consistent flash brightness across 2.5–5.5 V input range while preventing system reset during high-current pulses. | Use Scenario: Visual privacy notification during microphone/camera activation in voice assistants or conferencing apps. IC Role / Device Role / Timing Role: Configurable indicator LED driver using LEDI/NTC pin for patterned blinking or dimming via I²C registers. Use Value: Eliminates need for separate indicator controller; leverages same flash LEDs with low-power torch-mode current (28.125–112.5 mA). |
| White LED Biasing | RF-Coordinated Flash System |
Use Scenario: Constant-current biasing of high-brightness white LEDs in portable medical or industrial inspection devices. IC Role / Device Role / Timing Role: Dual-channel constant-current source supporting independent LED1/LED2 control for multi-zone lighting. Use Value: Enables precise luminance matching between LEDs without external current-setting resistors or op-amps. | Use Scenario: Synchronized flash operation in LTE/5G smartphones where RF transmit bursts must avoid concurrent flash current peaks. IC Role / Device Role / Timing Role: Dual TX1/TX2 inputs force instantaneous flash-to-torch transition (<20 µs settling) upon RF PA enable signal. Use Value: Prevents flash-induced RF desense and ensures compliance with cellular emission standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED flash driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3554TLE/NOPB | Single 1.5-A high-side current source; no dual-LED independent control; lacks TX2 interrupt output. | Targeted for cost-sensitive single-LED flash designs; no privacy indicator or dual-sync capability. | Select when only one flash LED is required and RF coordination is handled externally. |
| RT8542ZSP | 2-A boost flash driver with integrated 2.5-A MOSFET; no built-in ADC or NTC interface; uses PWM dimming instead of I²C register control. | Designed for higher-current flash applications requiring discrete current sensing; lacks thermal monitoring and indicator mode. | Select for >1.8-A flash needs where thermal feedback is managed by host processor. |
Compared with LM3554TLE/NOPB, the LM3559TLE/NOPB provides dual independent current sources and privacy indicator functionality; compared with RT8542ZSP, it offers integrated thermal sensing and I²C-based programmability at lower peak current, making it optimal for compact dual-LED camera modules requiring system-level coordination.
Availability
LM3559TLE/NOPB is available at Aetrix Electronics and suitable for smartphone camera modules, mobile privacy indicators, portable medical imaging devices, and RF-coordinated flash systems requiring stable component supply and long-term lifecycle support.
Supply support for LM3559TLE/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 interface solutions.
The LM3559TLE/NOPB belongs to TI's mobile LED driver product line, designed specifically for high-efficiency, space-constrained camera flash and indicator applications in smartphones and portable electronics.
FAQ
What is the maximum total flash current supported by the LM3559TLE/NOPB?
The LM3559TLE/NOPB supports up to 1.8 A total flash current when both LED1 and LED2 current sources are configured in parallel. Each channel delivers up to 900 mA with ±4% accuracy over –40°C to +85°C, enabling high-brightness camera flash operation while maintaining tight regulation across battery voltage and temperature variations. This capability is intrinsic to the LM3559TLE/NOPB's dual high-side architecture and adaptive headroom control.
How does the LM3559TLE/NOPB handle low-battery conditions during flash operation?
The LM3559TLE/NOPB implements battery-aware flash current scaling using its integrated VIN monitor. When input voltage falls below the programmable 2.9-V threshold (VIN_FLASH_TH), the device automatically reduces flash current to maintain system stability - preventing brownout during high-current pulses. This behavior is confirmed in Electrical Characteristics Table 6.5 and is a core design feature of the LM3559TLE/NOPB, not dependent on external firmware.
Can the LM3559TLE/NOPB drive a single LED at 1.8 A, or is dual-LED operation mandatory?
The LM3559TLE/NOPB can drive a single LED at up to 1.8 A by connecting LED1 and LED2 outputs together - a configuration explicitly supported in the datasheet's Description and Functional Block Diagram sections. The dual current sources are internally paralleled in this mode, preserving regulation and thermal safety. No external components are required beyond standard input/output capacitors and inductor, making the LM3559TLE/NOPB flexible for both single- and dual-LED implementations.
What protection features are integrated into the LM3559TLE/NOPB?
The LM3559TLE/NOPB integrates open/short LED detection, output overvoltage protection (5.0 V ±75 mV), thermal shutdown at 150°C, and VIN undervoltage lockout. It also monitors LED temperature via external NTC thermistor through the LEDI/NTC pin and reports faults via dedicated flag bits in the I²C register map. These protections are fully documented in Sections 6.1, 6.5, and 8.3 of the LM3559TLE/NOPB datasheet and require no external circuitry to activate.
Is the LM3559TLE/NOPB pin-compatible with other TI flash drivers like the LM3554TLE/NOPB?
No, the LM3559TLE/NOPB is not pin-compatible with the LM3554TLE/NOPB. While both use 16-pin DSBGA packages, their pin assignments differ significantly - for example, LM3559TLE/NOPB dedicates pins C1 (LEDI/NTC) and D1 (TX2/INT/GPIO2) for indicator/thermal/RF functions absent in LM3554TLE/NOPB. The LM3559TLE/NOPB datasheet confirms unique pin mapping in Section 5 (Pin Configuration and Functions), and no documentation states pin compatibility between these two devices.
LM3559TLE/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-WFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 2
- Voltage - Supply (Min):
- 2.5V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 5V
- Current - Output / Channel:
- 900mA (Flash)
- Frequency:
- 2MHz
- Dimming:
- I2C
- Applications:
- Camera Flash
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-DSBGA
LM3559TLE/NOPB FAQ
1.How can I place an order for LM3559TLE/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3559TLE/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 LM3559TLE/NOPB reliable?
The price and inventory of LM3559TLE/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3559TLE/NOPB is usually 5 days.
3.What payment methods are accepted for LM3559TLE/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3559TLE/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3559TLE/NOPB?
LM3559TLE/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3559TLE/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 LM3559TLE/NOPB?
For technical support, including LM3559TLE/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3559TLE/NOPB requirements.
6.How does Aetrix verify that LM3559TLE/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3559TLE/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 LM3559TLE/NOPB meets industry standards.
7.What is the process for return or replacement of LM3559TLE/NOPB?
All LM3559TLE/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3559TLE/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 LM3559TLE/NOPB part is unused and in its original packaging.
Return procedure for LM3559TLE/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM3559TLE/NOPB Tags
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