MP3326

– 16-CHANNEL LED DRIVER WITH I2C AND SEPARATED PDIM/ADIM

MP3326 Rev. 1.0

www.MonolithicPower.com

32

1/4/2021

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APPLICATION INFORMATION

LED Current Setting

Connect a resistor from the ISET pin to GND to

set the LED current for all 16 channels. The LED

current (ILED) can be calculated with Equation (5):

LED

ISET

500

I

(mA) =

R

(k

Ω)

(5)

For a maximum 50mA ILED, ensure that VIN ≥

4.5V to power the IC.

PCB Layout Guidelines

The traces from the LED anode to the LEDx pins

must be wide enough to support the set current

(up to 50mA) (see Figure 6).

LED7

SCL

SDA

ADDR

RFSH /FLT

ISET

EN

LED11

LED10

LED9

LED8

GND

1

2

3

4

5

6

19

18

17

16

15

14

LED1

7

13

LED12

Bottom GND

Top

Bottom

Vias

VLED+

Figure 6: Recommended PCB Layout