LP5569 Nine-Channel I2C RGB LED Driver With Engine Control and Charge Pump
1 Features
- Supply Voltage Range: 2.5 V–5.5 V
- Nine High-Accuracy Current Sinks
- 25.5 mA Maximum per Channel
- 8-Bit Individual Current Control
- 12-Bit 20-kHz Internal Individual PWM Control Without Audio Noise
- Three Programmable LED Engines
- Flexible Dimming Control
- I2C Dimming Control
- PWM Direct-Input Dimming
- PWM Input Frequency: 100-Hz to 20-kHz
- Adaptive High-Efficiency Charge-Pump Control for Driving High-VF LEDs With Low Battery Voltage
- Master Fader Control Allows Dimming of Multiple LEDs by Writing to Only One Register to Reduce the I2C Bus Traffic
- 2-µA Low Standby Current and 10-µA in Automatic Power-Save Mode When LEDs Are Inactive
- POR, UVLO, and TSD Protection
2 Applications
- Smart Speaker
- Smart Home Appliance
- Doorbell
- Electric Lock
- Smoke Detector
- Thermostat
- Set-Top Box
- Smart Router
- Bluetooth® Headset
- Cell Phone
LED Lighting, Indicator Lights, and Fun Lights for:
3 Description
The LP5569 device is a programmable, easy-to-use 9-channel I2C LED driver designed to produce lighting effects for various applications. The LED driver is equipped with an internal SRAM memory for user-programmed sequences and three programmable LED engines, which allow operation without processor control. Autonomous operation reduces system power consumption when the processor is put in sleep mode.
A high-efficiency charge pump enables the driving of LEDs with high VF, even with 2.5-V input voltage. The LP5569 LED driver maintains good efficiency over a wide operational voltage range by autonomously selecting the best charge-pump gain based on LED forward voltage requirements.
The LP5569 device enters power-save mode when LEDs are not active, lowering idle-current consumption considerably. A flexible digital interface allows the connection of up to eight LP5569 devices with a unique I2C slave address for each device in the same system, which supports synchronization of the lighting effects among all devices.
Device Information(1)
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| LP5569 | WQFN (24) | 4.00 mm × 4.00 mm |
- For all available packages, see the orderable addendum at the end of the data sheet.
Simplified Schematic
5 Device Comparison Table
| PART NUMBER | GROUP | I2C SLAVE ADDRESS | ||
|---|---|---|---|---|
| LP5569 | 0 | 32h–35h and 40h (see I2C Slave Addressing) | ||
| LP5569A | 1 | 42h–45h and 40h (see I2C Slave Addressing) | ||
6 Pin Configuration and Functions
Pin Functions
| PIN | TYPE(1) | DESCRIPTION | |
|---|---|---|---|
| NAME | NO. | ||
| ADDR | 20 | I | I2C slave-address selection pin. See I2C Slave Addressing for more details. This pin must not be left floating. |
| AGND | 4 | G | Analog and digital ground. Connect to PGND, exposed thermal pad, and common ground plane. |
| C1– | 24 | A | Negative pin of charge-pump flying capacitor 1. If charge pump is not used, this pin must be left floating. |
| C1+ | 2 | A | Positive pin of charge-pump flying capacitor 1. If charge pump is not used, this pin must be left floating. |
| C2– | 23 | A | Negative pin of charge-pump flying capacitor 2. If charge pump is not used, this pin must be left floating. |
| C2+ | 1 | A | Positive pin of charge-pump flying capacitor 2. If charge pump is not used, this pin must be left floating. |
| CLK | 6 | I, OD | Clock input/output. By default this pin is a clock input. If not used, this pin must be connected to GND or VIN. |
| EN/PWM | 5 | I | Chip enable and PWM input pin. |
| GPIO/TRIG/INT | 7 | I, OD | General-purpose input or open-drain output, or trigger input or open-drain output, or interrupt open-drain output. This pin function is configured in the I2C registers. By default this pin is a general-purpose output (open-drain) and can be left floating if not used. |
| LED0 | 19 | A | LED current sink 0. If not used, this pin can be left floating. |
| LED1 | 18 | A | LED current sink 1. If not used, this pin can be left floating. |
| LED2 | 17 | A | LED current sink 2. If not used, this pin can be left floating. |
| LED3 | 16 | A | LED current sink 3. If not used, this pin can be left floating. |
| LED4 | 15 | A | LED current sink 4. If not used, this pin can be left floating. |
| LED5 | 14 | A | LED current sink 5. If not used, this pin can be left floating. |
| LED6 | 13 | A | LED current sink 6. If not used, this pin can be left floating. |
| LED7 | 12 | A | LED current sink 7. If not used, this pin can be left floating. |
| LED8 | 11 | A | LED current sink 8. If not used, this pin can be left floating. |
| PGND | 21 | G | Charge-pump power ground. Connect to AGND, exposed thermal pad, and common ground plane. |
| SCL | 9 | I | I2C bus clock line. If not used, this pin must be connected to GND or VIN. |
| SDA | 8 | I, OD | I2C bus data line. If not used, this pin must be connected to GND or VIN. |
| V1P8 | 10 | P | Input power for digital circuitry. |
| VIN | 3 | P | Input power, a 1-µF capacitor must be connected between PGND and this pin. |
| VOUT | 22 | A | Charge-pump output voltage. If charge pump is used, a 1-µF capacitor must be connected between PGND and this pin. If charge pump is not used or is used in 1× mode only, the capacitor can be omitted. |
| Exposed thermal pad | — | — | Must be connected to AGND (pin 4), PGND (pin 21), and common ground plane. See Layout Example. Must be soldered to achieve appropriate power dissipation and mechanical reliability. |
