My Inquiry
My Account
Texas Instruments LP5524TMX-5/NOPB
- Part No.:
- LP5524TMX-5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 9-WFBGA, DSBGA
- Datasheet:
-
LP5524TMX-5/NOPB.pdf
- Description:
- IC LED DRVR LIN PWM 25MA 9DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:7,230
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LP5524TMX-5/NOPB from Texas Instruments is a four-channel high-side LED driver IC with dual-PWM brightness control, 2.7 V to 5.5 V input range, ±0.4% typical current matching across channels, and factory-programmable or resistor-set LED current up to 25 mA per channel - used in keypad backlighting, sub-display illumination, and status indicator systems.
For engineers reviewing the LP5524TMX-5/NOPB datasheet, LP5524TMX-5/NOPB pinout, LP5524TMX-5/NOPB application, or LP5524TMX-5/NOPB equivalent, key selection considerations include dual-bank independent enable control (ENA/ENB), DSBGA-9 package thermal performance (RθJA = 101.9°C/W), headroom voltage dependency (VHR ≥ 10 mV at 5 mA), ISET mirroring ratio (416:1), and PWM minimum ON time (33 μs).
Technical Context
The LP5524TMX-5/NOPB integrates two independently controlled high-side current source banks (A and B), each driving two LEDs (D1A/D2A and D1B/D2B) with matched output current regulation. It uses internal current mirrors referenced to the ISET pin, where external RISET sets total LED current via IDX = 515 / RISET (A).
Each bank enables linear brightness control via active-high PWM signals applied to ENA or ENB, with built-in turn-off delay compensation for linear duty-cycle response. The device requires minimum headroom voltage (VIN – VDX) ≥ 10 mV at 5 mA to maintain regulation, and supports shutdown supply current as low as 0.2 µA when both enables are deasserted.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 5.5 V - supports single-cell Li-ion, 3.3 V, and 5 V rail operation without external regulators. |
| Max LED Current per Channel | 25 mA - sufficient for bright indicator and keypad backlighting with standard 20 mA LEDs. |
| Current Matching | ±0.4% typical - ensures uniform brightness across all four LEDs without manual calibration. |
| ISET Mirroring Ratio | 416:1 - enables precise, resistor-programmable LED current (e.g., 32.4 kΩ → 15.9 mA). |
| Min PWM ON Time | 33 μs - supports >30 kHz PWM frequency for flicker-free dimming at full brightness range. |
| Shutdown Supply Current | 0.2 µA - minimizes system standby power in battery-powered devices. |
| Junction-to-Ambient RθJA | 101.9°C/W - defines thermal derating requirements for continuous 100 mA total output in compact layouts. |
Pinout & Package
The LP5524TMX-5/NOPB is housed in a 1.24 mm × 1.24 mm × 0.6 mm, 9-pin DSBGA (YFQ) package with 0.4 mm pitch and bottom-side solder balls. Thermal performance is optimized for PCB copper pour under the exposed die pad area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | ISET | Analog input for external current-setting resistor; internal 1.237 V reference enables 416:1 current mirroring. |
| A2 | ENB | Digital input enabling Bank B (D1B/D2B); active-high with internal pulldown - controls second LED pair independently. |
| A3 | ENA | Digital input enabling Bank A (D1A/D2A); active-high with internal pulldown - enables dual-stage brightness control. |
| B1 | D1B | Analog output - high-side current source for Bank B LED1; requires external LED anode connection. |
| B2 | VIN | Power input - supplies all internal circuitry and LED current sources; bypass capacitor recommended. |
| B3 | D1A | Analog output - high-side current source for Bank A LED1; shares VIN headroom with other outputs. |
| C1 | D2B | Analog output - high-side current source for Bank B LED2; matches D1B within ±0.4% typical. |
| C2 | GND | Ground reference - return path for internal circuitry and current-sense feedback; must be low-impedance. |
| C3 | D2A | Analog output - high-side current source for Bank A LED2; completes four-channel parallel drive capability. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable banks (A/B) | Enables two-stage brightness control: e.g., 25 mA with one bank, 50 mA with both - no firmware change required. |
| 0.4% typical current matching | Eliminates visible brightness variation across four LEDs in multi-color or uniform-white indicator arrays. |
| No external components required | Operates stand-alone with only optional RISET resistor and VIN bypass capacitor - reduces BOM count and board area. |
| Ultra-small DSBGA-9 footprint | 1.24 mm × 1.24 mm area fits in space-constrained handheld and wearable designs where 0402 LEDs are used. |
| Fast transient response (350 ns) | Supports rapid PWM switching without overshoot, critical for high-frequency dimming and dynamic lighting effects. |
Applications
| Keypad Backlighting | Sub-Display Backlighting |
|---|---|
|
Use Scenario: Illuminating alphanumeric keypads in industrial HMIs and consumer remotes under variable ambient light. IC Role / Device Role / Timing Role: High-side constant-current driver delivering matched 15–25 mA to four discrete SMD LEDs, controlled via MCU GPIO PWM on ENA/ENB. Use Value: Eliminates need for individual current-limiting resistors and ensures consistent key visibility across temperature (–40°C to +85°C). |
Use Scenario: Powering small monochrome LCD sub-displays in automotive instrument clusters or medical device status panels. IC Role / Device Role / Timing Role: Dual-bank LED driver supplying regulated current to two LED strings (e.g., top/bottom rows), synchronized to display refresh timing. Use Value: Enables independent brightness tuning per row using separate PWM inputs, improving contrast perception without added controller overhead. |
| Indicator LED Arrays | USB Device Status Lighting |
|
Use Scenario: Driving multi-color status indicators (e.g., red/green/yellow/blue) on network equipment front panels. IC Role / Device Role / Timing Role: Four-channel current source supporting mixed-color LEDs with forward voltages up to 2.6 V at 2.7 V VIN (per headroom spec). Use Value: Maintains color fidelity and intensity balance across colors by eliminating series-resistor tolerance drift and thermal variance. |
Use Scenario: Providing user-visible activity indication on USB peripherals such as hubs, dongles, and storage adapters. IC Role / Device Role / Timing Role: Low-quiescent-current LED driver activated directly from USB enumeration signals or host-controlled GPIO lines. Use Value: Draws only 0.2 µA in shutdown mode - preserves USB suspend compliance and extends battery life in portable accessories. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP5523TMX-5/NOPB | Three-channel version with identical DSBGA-9 package, same ISET mirroring, but lacks D2B output and Bank B enable. | Suitable only for 3-LED configurations; cannot support dual-bank PWM staging or 4-LED uniformity-critical layouts. | Select when exactly three LEDs are needed and board space or cost optimization outweighs flexibility loss. |
| LP5562RSBT | 6-channel, I²C-controlled LED driver in 20-pin WQFN; includes internal pattern engine and programmable timing registers. | Requires firmware initialization and I²C bus resources; supports complex lighting sequences not possible with LP5524TMX-5/NOPB's GPIO-only control. | Choose for dynamic lighting effects (breathing, blinking) where MCU GPIO count is constrained and sequencing intelligence is needed. |
Compared with LP5523TMX-5/NOPB, the LP5524TMX-5/NOPB adds a fourth channel and dual-bank control for staged brightness; compared with LP5562RSBT, it trades programmability and channel count for zero-firmware simplicity, lower component count, and smaller footprint - making it optimal for fixed-function, cost-sensitive indicator systems.
Availability
LP5524TMX-5/NOPB is available at Aetrix Electronics and suitable for keypad backlighting, sub-display illumination, and indicator LED applications requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.
Supply support for LP5524TMX-5/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, embedded processing, and digital signal processing technologies, with leadership in power management and precision analog ICs.
The LP5524TMX-5/NOPB belongs to TI's LP55xx family of ultra-compact LED drivers designed specifically for space-constrained, low-power indicator and backlight applications in portable and industrial electronics.
FAQ
What is the maximum LED forward voltage supported by LP5524TMX-5/NOPB at 2.7 V input?
The LP5524TMX-5/NOPB requires minimum headroom voltage (VHR) of 10 mV at 5 mA LED current. At VIN = 2.7 V, maximum supported LED forward voltage is 2.7 V – 0.01 V = 2.69 V. This ensures proper current regulation across all four channels of the LP5524TMX-5/NOPB under worst-case conditions.
Can LP5524TMX-5/NOPB drive more than 25 mA per channel?
No - the LP5524TMX-5/NOPB is specified for maximum 25 mA per channel. However, outputs within the same bank (e.g., D1A and D2A) can be paralleled to deliver up to 50 mA to a single LED string, provided thermal limits (TJ ≤ 125°C) and headroom voltage are maintained. This configuration is explicitly supported in the LP5524TMX-5/NOPB datasheet.
Does LP5524TMX-5/NOPB require an external ISET resistor?
No - the LP5524TMX-5/NOPB operates with factory-programmed default current when ISET is left floating or tied to VIN. An external RISET resistor is optional and used only when precise, user-defined current (e.g., 15.9 mA with 32.4 kΩ) is required. The LP5524TMX-5/NOPB internal reference remains active regardless of ISET connection state.
What is the thermal resistance (RθJA) of LP5524TMX-5/NOPB in its DSBGA package?
The LP5524TMX-5/NOPB has a junction-to-ambient thermal resistance of 101.9°C/W in the YFQ (DSBGA-9) package, measured under JEDEC JESD51-7 standard conditions. This value assumes a 2-layer PCB with 1-in² 2-oz copper pour under the package; actual RθJA will improve with enhanced thermal vias and larger copper areas in production layouts.
How does PWM brightness control work on LP5524TMX-5/NOPB?
PWM brightness control on LP5524TMX-5/NOPB is implemented by applying active-high PWM signals directly to ENA and/or ENB pins. LED average current scales linearly with duty cycle (e.g., 50% duty → 50% average current). The LP5524TMX-5/NOPB includes internal turn-off delay compensation to ensure linearity across the full 0–100% range, even at frequencies down to 100 Hz.
LP5524TMX-5/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 9-WFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- Yes
- Number of Outputs:
- 4
- Voltage - Supply (Min):
- 2.7V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- -
- Current - Output / Channel:
- 25mA
- Frequency:
- -
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 9-DSBGA
LP5524TMX-5/NOPB FAQ
1.How can I place an order for LP5524TMX-5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP5524TMX-5/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 LP5524TMX-5/NOPB reliable?
The price and inventory of LP5524TMX-5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP5524TMX-5/NOPB is usually 5 days.
3.What payment methods are accepted for LP5524TMX-5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP5524TMX-5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP5524TMX-5/NOPB?
LP5524TMX-5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP5524TMX-5/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 LP5524TMX-5/NOPB?
For technical support, including LP5524TMX-5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP5524TMX-5/NOPB requirements.
6.How does Aetrix verify that LP5524TMX-5/NOPB is sourced from the original manufacturer or authorized distributors?
All LP5524TMX-5/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 LP5524TMX-5/NOPB meets industry standards.
7.What is the process for return or replacement of LP5524TMX-5/NOPB?
All LP5524TMX-5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP5524TMX-5/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 LP5524TMX-5/NOPB part is unused and in its original packaging.
Return procedure for LP5524TMX-5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP5524TMX-5/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…
