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Texas Instruments LP5522TMX/NOPB
- Part No.:
- LP5522TMX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 6-WFBGA, DSBGA
- Datasheet:
-
LP5522TMX/NOPB.pdf
- Description:
- IC LED DRIVER LINEAR 20MA 6DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,262
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Product details
Overview
LP5522TMX/NOPB from Texas Instruments is a programmable high-side constant-current LED driver in DSBGA-6 package, delivering 1–20 mA adjustable output current via external ISET resistor, supporting 1–3 pulse blinking sequences with 1 ms to 255 ms on-time and 10 ms to 2500 ms off-time, used for indicator lighting in space-constrained handheld devices.
For engineers reviewing the LP5522TMX/NOPB datasheet, LP5522TMX/NOPB pinout, LP5522TMX/NOPB application, or LP5522TMX/NOPB equivalent, key selection factors include autonomous single-wire control, ultra-low 0.2 µA shutdown current, 35–100 mV headroom voltage at 10–20 mA, DSBGA-6 (0.4 mm pitch) footprint, and thermal shutdown at 160°C.
Technical Context
The LP5522TMX/NOPB operates autonomously without an external clock, using a single CTRL line for mode control (Run, Run Once, Training Start/End) via rising-edge counting. Its internal current mirror achieves 1:400 ISET-to-LED current ratio, enabling precise 1–20 mA regulation via external resistor or default 5 mA when ISET is tied to VDD.
It features three operational modes: Standby (0.2 µA), Active (40–55 µA), and Thermal Shutdown (TSD at TJ = 160°C). The high-side driver supports VIN from 2.7 V to 5.5 V, with minimum headroom of 35 mV at 10 mA and 70 mV at 20 mA, allowing efficient operation near LED forward voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Range | 2.7 V to 5.5 V - supports Li-ion battery and 3.3 V/5 V system rails |
| Output Current | 1 mA to 20 mA - set by external ISET resistor or defaults to 5 mA |
| LED On Time | 1 ms to 255 ms - programmable in 1 ms steps for precise blink timing |
| LED Off Time | 10 ms to 2500 ms - programmable in 10 ms steps for flexible duty cycling |
| Shutdown Current | 0.2 µA typical - enables long battery life in standby state |
| Headroom Voltage | 35 mV min at 10 mA - allows use with low-VF LEDs and tight supply margins |
| Thermal Shutdown | 160°C typical - protects against overtemperature during sustained LED drive |
Pinout & Package
LP5522TMX/NOPB uses a 6-bump DSBGA package (YFQ0006), measuring 1.215 mm × 0.815 mm × 0.6 mm with 0.4 mm pitch, optimized for ultra-compact portable PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (A1) | Power supply input | Accepts 2.7–5.5 V; powers internal logic and current source |
| ISET (B1) | Analog current reference input | Sets LED current via external resistor; 1.23 V reference enables IOUT = 480 / RISET (kΩ) |
| CTRL (C1) | Digital command input | Single-wire interface for mode selection (rising-edge counting); VIH = 1.2 V, VIL = 0.5 V |
| LED (A2) | High-side current source output | Drives LED anode; sinks current to GND/GNDT; supports up to 20 mA |
| GND (B2) | Primary ground reference | Return path for internal circuitry and current mirror bias |
| GNDT (C2) | Thermal ground terminal | Enhances thermal dissipation; must be connected to PCB ground plane for θJA = 87°C/W |
Key Features
| Feature | Design Value |
|---|---|
| Single-wire programmable control | Eliminates need for I²C/SPI interface; reduces MCU GPIO count and PCB routing complexity |
| Volatile sequence memory | Stores 1–3 LED ON/OFF times in training mode; resets on power cycle - simplifies firmware-less UI feedback |
| Autonomous operation | No external clock required; executes programmed blink patterns independently after activation - lowers system-level power management overhead |
| Low-headroom high-side driver | 35 mV min headroom at 10 mA enables direct drive of red/green/blue LEDs from 2.7 V supply - avoids boost converters in compact designs |
| Thermal protection with auto-recovery | Shuts down output at 160°C (typ.) and resumes at 140°C (typ.) - prevents permanent damage during transient overloads |
Applications
| Smartphone Status Indicators | Wearable Device Notifications |
|---|---|
Use Scenario: Visual status feedback for charging, message arrival, or missed call on smartphones with limited board area. IC Role / Device Role / Timing Role: High-side constant-current LED driver executing pre-programmed blink sequences autonomously. Use Value: Enables distinctive, low-power visual cues without MCU intervention - extends battery life and simplifies firmware. | Use Scenario: Pulse-based alerts on fitness trackers or smartwatches where size and power are critical. IC Role / Device Role / Timing Role: Single-pin-controlled LED controller generating user-customizable blink patterns (e.g., 2× short pulses for SMS, 1 long for call). Use Value: Delivers consistent brightness across varying battery voltage (2.7–5.5 V) while consuming only 0.2 µA in standby. |
| Consumer Electronics Power-On Feedback | Toy Interaction Lighting |
Use Scenario: Illuminated power-on confirmation on Bluetooth speakers or wireless earbud cases. IC Role / Device Role / Timing Role: Programmable LED driver activated by host microcontroller's CTRL signal to indicate system readiness. Use Value: Provides reliable, factory-programmable visual response with no additional timing components - reduces BOM count. | Use Scenario: Animated light effects synchronized to sound or button press in children's electronic toys. IC Role / Device Role / Timing Role: Self-contained blink sequencer triggered by simple digital edge - eliminates need for dedicated LED-driving MCU pins. Use Value: Supports multiple distinct blink patterns (1–3 pulses) stored in volatile memory - enables playful, interactive lighting with minimal hardware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP55231RSBT/NOPB | 3-channel version with I²C interface; supports RGB mixing and pattern engine; larger DSBGA-12 package | Requires MCU I²C support; suited for multi-color or complex animation, not single-LED indicator | Select when RGB control or persistent pattern storage is needed - not drop-in compatible due to pin count, interface, and memory architecture |
| MAX6953ATL+T | 16-port constant-current LED driver with I²C interface; integrated PWM and brightness control; TQFN-24 package | Designed for matrix/segmented displays; higher channel count and system integration overhead | Choose for multi-LED arrays or alphanumeric displays - incompatible pinout, protocol, and power architecture vs. LP5522TMX/NOPB |
Compared with LP5522TMX/NOPB, LP55231RSBT/NOPB adds RGB coordination and non-volatile pattern storage but requires I²C and more PCB area, while MAX6953ATL+T targets display systems with full PWM dimming - neither offers the same single-pin, ultra-low-power, self-contained blink capability in a 1.2 mm × 0.8 mm footprint.
Availability
LP5522TMX/NOPB is available at Aetrix Electronics and suitable for smartphone indicators, wearable notifications, and consumer electronics power feedback requiring stable component supply, RoHS-compliant packaging, and tape-and-reel delivery for automated assembly.
Supply support for LP5522TMX/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 headquartered in Dallas, Texas, specializing in analog, embedded processing, and power management ICs with broad industrial, automotive, and consumer reach.
The LP5522TMX/NOPB belongs to TI's LP55xx family of programmable LED drivers, designed specifically for ultra-compact, low-power visual feedback in battery-operated portable electronics where minimal GPIO usage and autonomous operation are essential.
FAQ
What is the function of the GNDT pin on the LP5522TMX/NOPB?
The GNDT (Ground Thermal) pin on the LP5522TMX/NOPB is a dedicated thermal ground terminal that improves heat dissipation from the die. It must be connected to the PCB ground plane to achieve the specified junction-to-ambient thermal resistance of 87°C/W. Unlike the standard GND pin, GNDT enhances thermal performance without carrying functional current, making it critical for reliability under sustained 20 mA LED drive conditions in the DSBGA-6 package.
How does the LP5522TMX/NOPB set its LED output current without an external resistor?
When no external resistor is connected to the ISET pin, the LP5522TMX/NOPB defaults to 5 mA output current. In this configuration, the ISET pin must be tied directly to VDD to establish the internal 1.23 V reference and enable the default current mirror ratio. This eliminates external components for basic indicator use, while retaining full programmability of blink timing and mode control via the CTRL pin.
Can the LP5522TMX/NOPB drive multiple LEDs simultaneously?
No, the LP5522TMX/NOPB drives only one LED per device via its single high-side current source output (LED pin). It is not designed for parallel or series LED strings. To drive multiple independent LEDs with individual control, multiple LP5522TMX/NOPB units or a multi-channel alternative like the LP55231RSBT/NOPB would be required - each LP5522TMX/NOPB operates autonomously with its own CTRL signal and ISET configuration.
What happens to the programmed blink sequence in the LP5522TMX/NOPB after power loss?
The programmed blink sequence in the LP5522TMX/NOPB is stored in volatile memory and is erased upon power removal. After VDD drops below 1.5 V (typ.), the internal Power-On Reset (POR) activates, resetting all registers and clearing the sequence. Users must re-enter training mode (via two rising edges on CTRL) to reload the desired ON/OFF timing - this design prioritizes simplicity and low cost over non-volatile storage.
Does the LP5522TMX/NOPB require an external bypass capacitor on VDD?
While not strictly required for basic operation, TI recommends a 100 nF X7R or X5R ceramic capacitor between VDD and GND for noise suppression. This capacitor stabilizes the supply during CTRL transitions and LED switching events, preventing false triggering or erratic behavior - especially important in noisy handheld environments where the LP5522TMX/NOPB is commonly deployed.
LP5522TMX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-WFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 2.7V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- -
- Current - Output / Channel:
- 20mA
- Frequency:
- -
- Dimming:
- -
- Applications:
- -
- Operating Temperature:
- -30°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-DSBGA
LP5522TMX/NOPB FAQ
1.How can I place an order for LP5522TMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP5522TMX/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 LP5522TMX/NOPB reliable?
The price and inventory of LP5522TMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP5522TMX/NOPB is usually 5 days.
3.What payment methods are accepted for LP5522TMX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP5522TMX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP5522TMX/NOPB?
LP5522TMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP5522TMX/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 LP5522TMX/NOPB?
For technical support, including LP5522TMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP5522TMX/NOPB requirements.
6.How does Aetrix verify that LP5522TMX/NOPB is sourced from the original manufacturer or authorized distributors?
All LP5522TMX/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 LP5522TMX/NOPB meets industry standards.
7.What is the process for return or replacement of LP5522TMX/NOPB?
All LP5522TMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP5522TMX/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 LP5522TMX/NOPB part is unused and in its original packaging.
Return procedure for LP5522TMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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