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Texas Instruments LP5012PWR
- Part No.:
- LP5012PWR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LP5012PWR.pdf
- Description:
- IC LED DRVR LIN PWM 35MA 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,541
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Product details
Overview
LP5012PWR from Texas Instruments is a 12-channel, 12-bit PWM constant-current sink LED driver optimized for RGB lighting control in human-machine interface applications. It delivers up to 35 mA per channel at VCC ≥ 3.3 V, features 29-kHz PWM switching to eliminate audible noise, and supports I²C fast-mode (400 kHz) with programmable slave addressing for multi-device systems. It is used in smart speaker indicator arrays requiring smooth breathing/fading effects.
For engineers reviewing the LP5012PWR datasheet, LP5012PWR pinout, LP5012PWR application, or LP5012PWR equivalent, key selection considerations include its ultra-low quiescent current (10 µA power-save mode), per-channel 12-bit color-mixing + independent brightness registers, 3-phase PWM phase-shifting for reduced input ripple, and hardware address pin support for up to four devices on one bus.
Technical Context
The LP5012PWR integrates twelve independent 12-bit PWM generators operating at 29 kHz, each fed by separate 8-bit color-mixing and 8-bit brightness-control registers. Its three-programmable RGB banks (R/G/B) enable synchronized global effects like fade-in/fade-out without MCU intervention.
It implements automatic power-saving mode (10 µA typical when all LEDs off >30 ms), 3-phase PWM phase-shifting across output groups (OUT0/3/6/9, OUT1/4/7/10, OUT2/5/8/11), and a single external resistor (IREF) setting full-scale current with ±5% device-to-device and channel-to-channel matching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 5.5 V - supports direct connection to common logic rails including 3.3 V and 5 V systems. |
| Max Output Current | 35 mA per channel at VCC ≥ 3.3 V - enables driving high-brightness RGB LEDs without external boost. |
| PWM Resolution & Freq | 12-bit resolution at 29 kHz - ensures smooth dimming with no perceptible flicker or audible noise. |
| I²C Speed | Up to 400 kHz - allows rapid configuration of all 12 channels within a single fast-mode transaction. |
| Quiescent Current | 10 µA typical in power-save mode - critical for battery-powered smart home endpoints like video doorbells. |
| Current Accuracy | ±5% device-to-device and channel-to-channel - guarantees consistent color balance across multi-LED arrays. |
| Output Voltage Max | 6 V - accommodates standard red/green/blue LED forward voltages in series or parallel configurations. |
Pinout & Package
The LP5012PWR is housed in a 24-pin TSSOP package (PW) measuring 7.80 mm × 4.40 mm, with exposed thermal pad for enhanced power dissipation in compact layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Chip enable input | Active-high logic control enabling full shutdown (1 µA) or wake-up; synchronizes I²C access timing. |
| SCL / SDA | I²C bus interface | Standard two-wire serial interface compatible with 1.8 V, 3.3 V, and 5 V controllers; supports broadcast addressing. |
| ADDR0 / ADDR1 | Slave address selection | Hardware-configurable pins allowing up to four LP5012PWR devices on one I²C bus without software address conflicts. |
| OUT0–OUT11 | Constant-current sink outputs | Twelve dedicated current sinks (each up to 35 mA); grouped into three 4-channel phases for PWM phase-shifting. |
| IREF | Global current reference | Single external resistor sets full-scale current for all channels; determines absolute output accuracy and matching. |
| VCAP | Internal LDO output | Must be decoupled with 1 µF capacitor to GND; stabilizes internal analog circuitry and reduces supply noise sensitivity. |
| VCC / AGND / PGND / DGND | Power and ground domains | Separate analog, power, and digital grounds - must be connected together at a single point to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Independent color + brightness control | Each channel has dedicated 8-bit color-mixing and 8-bit intensity registers - enables >16M colors per LED without MCU-level arithmetic. |
| Programmable logarithmic/linear dimming | Global Log_Scale_EN bit selects dimming curve - preserves color fidelity during low-brightness logarithmic scaling. |
| 3-phase PWM phase-shifting | Outputs divided across three timing phases - reduces peak input current by ~33% and suppresses ceramic capacitor ringing. |
| RGB bank control | Three programmable R/G/B banks (BANK_A/B/C_COLOR + BANK_BRIGHTNESS) - simplifies global animation effects like breathing with one register write. |
| Auto-increment I²C addressing | Enables sequential register read/write in single transmission - cuts firmware overhead for bulk LED state updates. |
Applications
| Smart Speaker Indicator Array | Video Doorbell Status Lighting |
|---|---|
|
Use Scenario: Real-time visual feedback for voice assistant wake state, volume level, and connection status using multi-color RGB LEDs. IC Role / Device Role / Timing Role: LP5012PWR acts as the dedicated RGB LED controller, managing 12 independently dimmed and color-mixed indicators synchronized to audio processing events. Use Value: 12-bit PWM resolution and 29-kHz switching ensure flicker-free, silent operation during voice interaction - critical for user experience in quiet environments. |
Use Scenario: Dynamic status indication (e.g., motion detection, doorbell press, Wi-Fi strength) on compact PCBs where space limits discrete LED drivers. IC Role / Device Role / Timing Role: LP5012PWR serves as the integrated current sink and PWM generator, replacing multiple discrete transistors and timers in battery-constrained edge devices. Use Value: Ultra-low 10 µA power-save mode extends battery life in always-on monitoring - enabling >1-year operation on coin-cell batteries in intermittent-use applications. |
| Smart Lock Keypad Backlight | Smoke Detector Alert Ring |
|
Use Scenario: Uniform, adjustable backlighting for capacitive touch keypads with ambient-light-adaptive brightness and color-coded security states. IC Role / Device Role / Timing Role: LP5012PWR provides precise per-key RGB control via I²C, leveraging bank-mode registers to apply global dimming curves across all keys simultaneously. Use Value: Independent color-mixing registers allow real-time hue shifts (e.g., green → amber → red) to indicate lock/unlock/low-battery states without MCU resource load. |
Use Scenario: High-visibility, attention-grabbing alert ring using 12 RGB LEDs arranged in circular pattern around detector housing. IC Role / Device Role / Timing Role: LP5012PWR drives synchronized chasing or pulsing patterns using 3-phase PWM phase-shifting to maintain low input current surge during alarm activation. Use Value: Phase-shifted PWM reduces peak input current by distributing LED turn-on events - prevents brownout in shared power rails with smoke sensing circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RGB LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC59116IPWPR | 16-channel, 12-bit PWM, but no integrated phase-shifting or RGB bank control; higher 25 mA max current; requires external current-setting resistors per channel. | Lacks hardware-assisted breathing/fade effects; firmware must manage timing and color mixing - increases MCU load in resource-constrained designs. | Choose TLC59116IPWPR only if higher channel count is required and phase-shifting is not needed for input ripple reduction. |
| IS31FL3728-QFLS4-TR | 28-channel, 12-bit PWM with auto-breathing engine and built-in gamma correction; operates at 26 kHz; supports 1.8 V–5.5 V VCC but lacks hardware address pins. | Includes dedicated breathing hardware but no RGB bank grouping; uses I²C address hardwired or set via EEPROM - less flexible for multi-device bus topology. | Prefer IS31FL3728-QFLS4-TR when advanced auto-effects (pulse, blink, breathe) are required and bus scalability is secondary to effect richness. |
Compared with TLC59116IPWPR and IS31FL3728-QFLS4-TR, the LP5012PWR uniquely combines hardware RGB bank control, 3-phase PWM shifting, and dual hardware address pins - making it optimal for cost-sensitive, battery-powered smart home endpoints needing synchronized multi-LED animations with minimal MCU overhead.
Availability
LP5012PWR is available at Aetrix Electronics and suitable for smart speaker indicator arrays, video doorbell status lighting, and electronic smart lock keypad backlights requiring stable component supply and long-term production continuity.
Supply support for LP5012PWR 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 with over 50 years of innovation in precision analog ICs.
The LP50xx family was designed specifically for ultra-low-power, high-fidelity RGB LED control in human-machine interface applications - prioritizing smooth animation, minimal audible noise, and simplified firmware integration.
FAQ
What is the maximum output current per channel for LP5012PWR?
The LP5012PWR delivers up to 35 mA per channel when VCC is ≥ 3.3 V and the Max_Current_Option bit is set to 1. At full VCC range (2.7 V–5.5 V), the maximum is 25.5 mA per channel. This is set globally via the external IREF resistor and applies uniformly across all 12 output channels (OUT0–OUT11). The LP5012PWR maintains ±5% channel-to-channel current matching under these conditions.
How does LP5012PWR reduce audible noise in RGB LED applications?
The LP5012PWR eliminates audible noise by operating its integrated PWM generators at a fixed 29-kHz switching frequency - well above the 20-kHz human hearing threshold. Unlike lower-frequency drivers that produce buzzing during dimming, the LP5012PWR ensures silent operation even during dynamic effects like breathing or fading. This behavior is inherent to the LP5012PWR's architecture and requires no external filtering or firmware tuning.
Can LP5012PWR drive more than one RGB LED per channel?
Yes - each LP5012PWR output (OUT0–OUT11) is a constant-current sink capable of driving multiple LEDs in series, provided the total forward voltage remains ≤6 V and the combined current demand stays within the per-channel limit (25.5 mA or 35 mA). For example, three 2-V red LEDs in series (6 V total) can be driven at 20 mA using a single OUT pin. The LP5012PWR's 6-V output voltage rating supports this configuration without external components.
What is the function of the ADDR0 and ADDR1 pins on LP5012PWR?
The ADDR0 and ADDR1 pins on LP5012PWR are hardware slave-address selection inputs that configure the device's 7-bit I²C address. With both pins grounded, the default address is 0x60; other combinations yield addresses 0x61, 0x62, or 0x63 - enabling up to four LP5012PWR devices on a single I²C bus without address conflict. These pins must never be left floating and are sampled at power-up or EN assertion.
Does LP5012PWR support logarithmic dimming for improved human-eye perception?
Yes - the LP5012PWR includes a global Log_Scale_EN register that enables logarithmic-scale brightness control across all channels. When activated, this feature maps the 8-bit LEDx_BRIGHTNESS register input to a perceptually uniform dimming curve, preserving color fidelity at low intensities - a critical capability for applications like smart speaker status rings where subtle brightness changes must remain visually consistent. Linear scaling remains available for custom firmware-based curves.
LP5012PWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- Constant Current
- Internal Switch(s):
- No
- Number of Outputs:
- 12
- Voltage - Supply (Min):
- 2.7V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 0V ~ 5.5V
- Current - Output / Channel:
- 35mA
- Frequency:
- 29kHz
- Dimming:
- Analog, PWM
- Applications:
- LED Lighting
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TSSOP
LP5012PWR FAQ
1.How can I place an order for LP5012PWR through Aetrix?
Please submit a Request for Quotation (RFQ) for LP5012PWR 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 LP5012PWR reliable?
The price and inventory of LP5012PWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP5012PWR is usually 5 days.
3.What payment methods are accepted for LP5012PWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP5012PWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP5012PWR?
LP5012PWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP5012PWR 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 LP5012PWR?
For technical support, including LP5012PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP5012PWR requirements.
6.How does Aetrix verify that LP5012PWR is sourced from the original manufacturer or authorized distributors?
All LP5012PWR 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 LP5012PWR meets industry standards.
7.What is the process for return or replacement of LP5012PWR?
All LP5012PWR units undergo pre-shipment inspection (PSI). If there is an issue with LP5012PWR, 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 LP5012PWR part is unused and in its original packaging.
Return procedure for LP5012PWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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