MP3326

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

MP3326 Rev. 1.0

www.MonolithicPower.com

6

1/4/2021

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2021 MPS. All Rights Reserved.

ELECTRICAL CHARACTERISTICS

VIN = 5V, VEN = 3.5V, TJ = 25°C, unless otherwise noted.

Parameter

Symbol

Condition

Min

Typ

Max

Units

Input Supply Voltage

Input voltage range

VIN

4

16

V

Quiescent supply current

IQ

4

mA

Shutdown supply current

IST

VEN = 0V, VIN = 16V

2

μA

Input UVLO threshold

VIN_UVLO

Rising edge

3.45

3.7

3.95

V

Falling edge

3.15

3.5

3.85

V

Enable

EN rising threshold

VEN_ON

EN rising

2.1

V

EN falling threshold

VEN_OFF

EN falling

0.8

V

EN pull-down resistor

REN

1

MΩ

RFSH/FLT

RFSH/FLT output frequency

fRFSH

FRFSH9:0 = 0x1A9,

FPWM2:0 = 01

285

300

315

Hz

RFSH/FLT pull-down

resistor

FLTEN = 1, fault is triggered

100

Ω

LED Regulator

ISET voltage

VISET

1.174

1.2

1.226

V

LED current

ILED

RISET = 20k

Ω,

ICHX, bits[5:0] = 0x3F

-2%

25

+2%

mA

Current sink headroom

VLEDX

ILED = 25mA

150

210

mV

Dimming

PWM frequency

fPWM

230

245

260

Hz

PWM duty step

tPWM

12-bit resolution, fPWM = 250Hz

0.97

μs

Phase shift

tDELAY

PS, EN = 1

40

μs

LED current step

ILED = 25mA,

analog dimming step

0.4

mA

LED current slew rate in

PWM dimming

SLEW, bits [1:0] = 01,

rising edge

5

μs

SLEW, bits [1:0] = 11,

rising edge

20

μs

Protection

LED string short protection

threshold

VSLP

STH, bits[1:0] = 01

2.75

3

3.25

V

LED string short protection

time

tSLP

VLEDX > STH

4

ms

LED string short protection

hiccup time

tSLP_HICCUP

1

ms

LED string short protection

hiccup detection time

VSLP_DET

32

μs

LED string open-load

protection threshold

VLED_UV

100

160

mV