LP5562 datasheet(40/52 Pages) TI2

40 / 52 page

LP5562

MCU

1 PF

CIN

SCL

SDA

CLK_32K

ADDR_SEL0

ADDR_SEL1

EN/VCC

VDD

GND

RGB LED

0...25.5 mA/LED

WLED

VDD

LP5562

SNVS820B – APRIL 2013 – REVISED DECEMBER 2016

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Product Folder Links: LP5562

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8 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

8.1 Application Information

The LP5562 is designed for mobile applications with an input voltage VIN between 2.7 V to 5.5 V to support a 1S

lithium-ion battery source. A microcontroller or other I2C host is required to initialize and configure the LP5562

after power-up. An internal of external 32-kHz clock is required. If multiple LP5562 devices are used to sequence

multiple RGB LEDs, then the external 32-kHz clock input is required. The ADDRSEL0 and ADDRSEL1 pins can

be used to allow unique sequencing of up to four LP5562 devices on the same I2C bus.

The four LED current drivers can be configured up to 25.5-mA LED current each and are tolerant up to 6-V LED

supply voltage.

8.2 Typical Application

Figure 44 shows the typical application for LP5562 supporting one RGB LED and one White LED with the four

LED current outputs.

Figure 44. LP5562 Typical Application

8.2.1 Design Requirements

For typical LED-driver applications, use the parameters listed in Table 44.

Table 44. Design Parameters

DESIGN PARAMETER

EXAMPLE VALUE

Minimum input voltage

2.7 V

Maximum input voltage

5.5 V

EN/VCC logic level

1.8 V

R output current

24 mA

G output current

20 mA

B output current

22 mA

WLED output current

18 mA

PWM frequency

256 Hz

32-kHz clock source

External

Light engines 1, 2 and 3

Blink on/off

Power-save mode

Enabled

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