Specifications
| Type | Description |
|---|---|
| Part Number | LP3950 |
| Manufacturer | Texas Instruments |
| Product Type | SMD LED |
| Category | LED |
| Package / Case | 32-lead TLGA, 4.5 x 5.5 x 0.8 mm, 0.5 mm pitch, package NPC0032A |
| Component Type | Power_IC |
| LED Synchronization Modes | Amplitude and frequency; condition: analog audio input synchronization |
| Input Signal Optimization | Automatic gain control or selectable gain; condition: audio input optimization |
| LED Pattern Generation | Programmable RGB pattern generator; programmable color, intensity, on/off timing, slope, blinking cycle |
| Boost Converter Type | Magnetic DC-DC boost converter; programmable boost output voltage and switching frequency |
| Control Interfaces | SPI, I2C compatible, or direct enable; IF_SEL selects serial interface; direct enable uses enable lines |
| Default Mode Control | One-pin default enable and one-pin synchronization mode selector; non-serial interface operation |
| Package Pins | 32 pins; TLGA package |
| Boost Feedback Pin | FB input; pin 1; boost converter feedback |
| Boost Switch Pin | SW open-drain output; pin 3; boost converter power switch |
| LED Driver Outputs | R1, G1, B1, R2, G2, B2 open-drain outputs; RGB LED driver outputs |
| Logic Interface Select | IF_SEL=1 selects SPI mode; pin 25 SPI/I2C select |
| Absolute Maximum Voltage on SW, FB, LED Outputs | -0.3 to +7.2 V; V(SW, FB, R1-2, G1-2, B1-2) |
| Absolute Maximum Supply Voltage | -0.3 to +6.0 V; VDD1, VDD2, VDDIO, VDDA |
| Absolute Maximum Audio Input Voltage | -0.3 V to VDD1 + 0.3 V, 6.0 V max; ASE, AD1, AD2 pins |
| Absolute Maximum Logic Pin Voltage | -0.3 V to VDD_IO + 0.3 V, 6.0 V max; logic pins |
| Absolute Maximum LED Output Current | 150 mA; I(R1, G1, B1, R2, G2, B2) |
| Maximum Boost Converter Total Load Current | 300 mA; total load current limit |
| Absolute Maximum VREF Current | 10 uA; I(VREF) |
| Maximum Junction Temperature | 125 °C; TJ-MAX |
| Storage Temperature Range | -65 to +150 °C; storage |
| Maximum Lead Temperature | 260 °C; reflow soldering, 3 times |
| ESD Rating, Human Body Model | 2 kV; 100 pF discharged through 1.5 kOhm |
| ESD Rating, Machine Model | 200 V; 200 pF discharged directly into each pin |
| Operating Voltage on SW, FB, LED Outputs | 0 to 6.0 V; V(SW, FB, R1-2, G1-2, B1-2) |
| Operating Supply Voltage | 2.7 to 2.9 V; VDD1, VDD2, VDDA |
| Logic I/O Supply Voltage | 1.65 V to VDD1,2; VDDIO operating range |
| Operating Audio Input Voltage | 0.1 V to VDD1 - 0.1 V; ASE, AD1, AD2 pins |
| Recommended Load Current | 0 to 300 mA; operating ratings |
| Operating Junction Temperature Range | -40 to +125 °C; TJ range |
| Operating Ambient Temperature Range | -40 to +85 °C; TA range |
| Junction-to-Ambient Thermal Resistance | 72 °C/W; NPC0032A package |
| Standby Supply Current | typ 1 uA, max 5 uA; NSTBY=L register; SCK, SS, SI, NRST=H; VDD1+VDD2+VDDA current |
| No-Load Supply Current | typ 300 uA, max 400 uA; NSTBY=H register, EN_BOOST=L register, boost off, SCK/SS/SI/NRST=H |
| Full-Load Supply Current | typ 850 uA; NSTBY=H register, EN_BOOST=H register, boost on, SCK/SS/SI/NRST=H, all outputs active, audio block inactive |
| VDDIO Supply Current | typ 20 uA; 1.0 MHz SCK frequency, CL=50 pF at SO pin |
| Audio Circuitry Supply Current | typ 550 uA; INPUT_SEL=[10] register |
| Reference Voltage | typ 1.230 V; IREF <= 1.0 nA, test purpose only |
| Boost Output Voltage Example Range | 4.1 to 5.3 V; block diagram typical application |
| Boost Switching Frequency Test Value | 2.0 MHz; electrical characteristics test setup, LBOOST=4.7 uH |
| Recommended Boost Inductor | 4.7 uH; typical application and electrical characteristics setup |
| Recommended RT Resistor | 82 kOhm; typical application oscillator resistor |
| Internal Startup Delay | 10 ms; startup sequence for oscillator initialization |
| Boost Startup Delay | 10 ms; soft-start boost output in PFM mode; RGB outputs off during delay |
| Thermal Shutdown Engage Temperature | typ 160 °C; TJ thermal shutdown engages |
| Thermal Shutdown Disengage Temperature | typ 140 °C; TJ thermal shutdown disengages |
| Logic Input Low Level | max 0.5 V; SS, SI, SCK/SCL, PWM_LED, IF_SEL; 1.80 V <= VDDIO <= VDD1,2 |
| Logic Input High Level | min VDDIO - 0.5 V; SS, SI, SCK/SCL, PWM_LED, IF_SEL; 1.80 V <= VDDIO <= VDD1,2 |
| Logic Input Current | min -1.0 uA, max 1.0 uA; SS, SI, SCK/SCL, PWM_LED, IF_SEL |
| I2C Clock Frequency | max 400 kHz; I2C mode, 1.80 V <= VDDIO <= VDD1,2 |
| SPI Clock Frequency | max 8 MHz; SPI mode |
| SO Output Low Level | typ 0.3 V, max 0.5 V; ISO=3.0 mA |
| SO Output High Level | min VDDIO - 0.5 V, typ VDDIO - 0.3 V; ISO=-3.0 mA |
| SO Output Leakage Current | max 1.0 uA; VSO=2.8 V |
| SDA Output Low Level | typ 0.3 V, max 0.5 V; ISDA=3.0 mA |
| DME/AMODE Pulldown Resistance | 1 MOhm; internal pulldown |
| DME/AMODE Input Current | min -1.0 uA, max 6.0 uA; logic inputs DME, AMODE |
| Low-Voltage Logic Input Low Level | max 0.35 V; SCL, PWM_LED, IF_SEL; 1.65 V <= VDDIO < 1.80 V |
| Low-Voltage Logic Input High Level | min VDDIO - 0.35 V; SCL, PWM_LED, IF_SEL; 1.65 V <= VDDIO < 1.80 V |
| Low-Voltage I2C Clock Frequency | max 200 kHz; I2C compatible interface only, 1.65 V <= VDDIO < 1.80 V |
| NRST Input Low Level | max 0.5 V; 1.65 V <= VDDIO <= VDD1,2 |
| NRST Input High Level | min 1.3 V; 1.65 V <= VDDIO <= VDD1,2 |
| NRST Input Current | min -1.0 uA, max 1.0 uA; 1.65 V <= VDDIO <= VDD1,2 |
| NRST Reset Pulse Width | min 10 us; guaranteed by design |
| Datasheet Status | request_only |
Product Overview
The LP3950 is a Texas Instruments color LED driver with an audio synchronizer for RGB LED effects. Its analog audio input synchronization supports amplitude and frequency modes, while audio input optimization can use automatic gain control or selectable gain. The internal pattern generator supports programmable color, intensity, on/off timing, slope, and blinking cycle.
The device includes a magnetic DC-DC boost converter with programmable boost output voltage and switching frequency. A typical application uses a 4.7 uH boost inductor and an 82 kOhm RT oscillator resistor, with an example boost output voltage range of 4.1 to 5.3 V. Startup behavior includes a 10 ms internal oscillator delay and a 10 ms boost soft-start delay with RGB outputs off during the boost delay.
LP3950 is offered in a 32-lead TLGA package, 4.5 x 5.5 x 0.8 mm, 0.5 mm pitch, package NPC0032A. Operating ratings include 2.7 to 2.9 V supply, 0 to 6.0 V on SW, FB, and LED outputs, 0 to 300 mA load current, -40 to +125 °C junction temperature, and -40 to +85 °C ambient temperature.
Key Features
- Analog audio synchronization by amplitude and frequency
- Automatic gain control or selectable audio input gain
- Programmable RGB pattern generator for color and timing
- Magnetic DC-DC boost converter with programmable output
- SPI, I2C-compatible, or direct-enable control options
- R1, G1, B1, R2, G2, B2 open-drain outputs
- 2.7 to 2.9 V operating supply range
- 1.65 V to VDD1,2 logic I/O supply range
- Up to 8 MHz SPI clock frequency
- Up to 400 kHz I2C clock frequency
- 0 to 300 mA recommended load current
- 32-lead TLGA package, 0.5 mm pitch
Typical Applications
- RGB LED audio synchronization
- Programmable color LED effects
- Amplitude-based LED response
- Frequency-based LED response
- Direct-enable RGB lighting
- SPI-controlled LED lighting
- I2C-compatible LED lighting
- Boosted RGB LED drive
Procurement Notes
When requesting a quote for LP3950, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For LED and optoelectronic sourcing, brightness bin, wavelength or color temperature bin, forward voltage range, viewing angle, moisture sensitivity level and soldering process limits may affect final selection, availability and lead time.
FAQ
What type of device is the LP3950?
The LP3950 is a Texas Instruments color LED driver with audio synchronizer. It includes RGB LED open-drain outputs, a programmable RGB pattern generator, and a magnetic DC-DC boost converter.
Which control interfaces does the LP3950 support?
The LP3950 supports SPI, I2C-compatible control, or direct enable operation. The IF_SEL pin selects the serial interface, and direct-enable operation uses enable lines for non-serial interface control.
What package is used for the LP3950?
The LP3950 is supplied in a 32-lead TLGA package measuring 4.5 x 5.5 x 0.8 mm with 0.5 mm pitch. The listed package identifier is NPC0032A.
What are the LP3950 operating supply ratings?
The operating supply voltage for VDD1, VDD2, and VDDA is 2.7 to 2.9 V. The VDDIO logic I/O supply range is 1.65 V to VDD1,2.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 27, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.