LP5817

Part: LP5817 (LP5817DRLR, LP5817YCHR) — Texas Instruments

Type: 3-Channel I²C RGB LED Driver (constant current sink)

Description: 2.5–5.5 V supply, 3-channel constant-current RGB LED driver with 0.1–51 mA per channel, 8-bit analog (dot current) and PWM dimming at 23 kHz, and a 400 kHz I²C interface.

Operating Conditions:

• Supply voltage (VCC): 2.5–5.5 V
• Operating temperature: TA -40 to 85 °C; TJ -40 to 125 °C
• Output pin (OUT0–OUT2) and SCL/SDA voltage: 0–5.5 V
• Effective input capacitance: 1 μF min (4.7 μF nominal)

Absolute Maximum Ratings:

• Voltage at VCC, SCL, SDA, OUT0, OUT1, OUT2: -0.3 to 6 V
• Junction temperature: -40 to 150 °C
• Storage temperature: -65 to 150 °C
• ESD: ±4000 V HBM, ±1500 V CDM

Key Specs:

• Output current range per channel: 0.1–25.5 mA (MAX_CURRENT = 0) or 0.2–51 mA (MAX_CURRENT = 1), VCC = 3.6 V
• Channel-to-channel error: ±3% max at 25.5 mA; ±2% max at 51 mA
• Device-to-device error: ±11% max
• Headroom voltage (VCC = 3.6 V): 0.135 V max at 25.5 mA; 0.275 V max at 51 mA
• Headroom voltage (VCC = 2.5 V): 0.15 V max at 25.5 mA; 0.3 V max at 51 mA
• Shutdown current: 0.1 μA typ, 0.3 μA max (VCC = 3.6 V)
• Standby current: 22 μA typ, 28 μA max
• Normal operation current: 0.15 mA typ (outputs disabled); 0.23 mA typ, 0.3 mA max (3 × 25.5 mA)
• UVLO: 2.3 V typ rising, 2.1 V typ falling
• PWM frequency: 23 kHz typ; internal oscillator 6 MHz typ
• Output leakage: 0.1 μA typ, 1 μA max
• Thermal shutdown: 150 °C min threshold, 15 °C hysteresis

Features:

• 3 high-precision constant current sinks
• Global 1-bit maximum current selection (25.5 mA or 51 mA)
• Individual 8-bit dot current setting
• Individual 8-bit PWM dimming with linear or exponential curves
• Audible-noise-free PWM up to 23 kHz
• I²C interface up to 400 kHz (slave address 0x2D)
• Logic pins compatible with 1.8 V, 3.3 V and 5 V
• Output voltage up to 5.5 V
• Shutdown via command or by holding SCL low

Applications:

• LED animation and indication in personal electronics
• VR headsets, gaming controllers and peripherals
• Electronic and robotic toys
• Smart and wireless speakers
• Solid state drives
• Electronic smart locks
• Headsets, headphones and earbuds
• GPS personal navigation devices
• WLAN/Wi-Fi access points
• Video doorbells and video conference systems

Package:

• DRL (SOT583-8), 2.1 mm × 1.6 mm, 0.5 mm pitch (LP5817DRLR)
• YCH (DSBGA-8), 1.4 mm × 0.7 mm, 0.35 mm pitch (LP5817YCHR)

• Operating voltage range
• -VCC range: 2.5V to 5.5V
• -Logic pins compatible with 1.8V, 3.3V, and 5V
• -Output voltage up to 5.5V
• 3 constant current sinks with high precision
• -0.1mA to 51mA per channel
• -Channel-to-channel error: ±3% (maximum)
• -Ultra-low headroom voltage: 135mV (maximum) at 25.5mA; 275mV (maximum) at 51mA
• Ultra-low power consumption
• -Shutdown: ISD = 0.1μA (typical)
• -Standby: ISTB = 22μA (typical)
• -Active:
• INOR = 0.15mA (typical) when disable output channel
• INOR = 0.23mA (typical) when LED current = 25.5mA
• Analog dimming (current gain control)
• -Global 1-bit Maximum Current (MC): 25.5mA or 51mA
• -Individual 8-bits Dot Current (DC) setting
• PWM dimming up to audible-noise-free 23kHz
• -Individual 8-bits PWM dimming resolution
• -Linear or exponential dimming curves
• 400kHz (maximum) I 2 C interface
• ESD: 4kV HBM, 1.5kV CDM
• Package
• -2.1mm × 1.6mm SOT583-8 with 0.5mm pitch
• -1.4mm × 0.7mm DSBGA-8 with 0.35mm pitch
• -40°C to 125°C operating temperature range

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LED animation and indication for:

• Personal Electronics
• -Virtual Reality (VR) Headset
• -Gaming Controller and Peripherals
• -Electronic and Robotic Toys
• -Smart Speaker
• -Wireless Speaker
• -Solid State Drive (SSD)
• -Electronic Smart Lock
• -Headsets/Headphones and Earbuds
• -GPS Personal Navigation Device
• WLAN/Wi-Fi Access Point
• Video Doorbell
• Video Conference System

Figure 5-1. LP5817 DRL Package 8-Pin SOT583 Top View

Figure 5-2. LP5817 YCH Package 8-Pin DSBGA Top View

Table 5-1. Pin Functions

• (1) P = Power Pin, I = Input Pin, I/O = Input/Output Pin, O = Output Pin.

Table 5-1. Pin Functions

Unless specified otherwise, typical characteristics apply over the full ambient temperature range (-40°C < T A < +85°C ), VCC = 3.6V, CIN = 1μF.

over operating free-air temperature range (unless otherwise noted) (1)

over operating free-air temperature range (unless otherwise noted)

The LP5817 is a 3 channel RGB LED driver. The device has ultra-low operation current at active mode and only consumes 0.25mA when LED current is set at 25mA. In battery powered applications like e-tag, ear bud, e-cigarettes, VR headset, RGB mouse, smart speaker, and other hand-held devices, LP5817 can provide premium LED lighting effects with low power consumption and small package.

• (1) For more information, see Section 11 .
• (2) The package size (length × width) is a nominal value and includes pins, where applicable

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LP5817 Simplified Schematic