MP3313

3-Channel, Max 38V Output,

Linear/Exponential, Analog Dimming,

MP3313 Rev1.0

www.MonolithicPower.com

1

8/2/2017

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© 2017 MPS. All Rights Reserved.

DESCRIPTION

The MP3313 is a step-up, white, LED converter.

The MP3313 uses peak-current mode and a

3-channel current sink to regulate the LED

current with up to 25mA on each channel

(100mA at flash mode) with 2.7 - 5.5V input

voltage.

The

MP3313

integrates

a

300m

Ω,

42V

MOSFET and supports selectable over-voltage

protection (17/23/30/38V). The MP3313 can

drive up to 10 LEDs in series for LCD panels

greater than 5”.

The MP3313 achieves ultra-high resolution

analog dimming by converting the pulse-width

input signal or internal register code to an 11-bit

brightness code. The MP3313 is designed with

two types of LED current dimming mapping:

linear and exponential mapping.

An

auto-switching

frequency

function

is

integrated to optimize efficiency performance.

Full protection features include LED open and

short

protection,

cycle-by-cycle

current-limit

protection, and thermal shutdown.

program the MP3313 for flexible applications,

such as dimming mode, LED current slope, and

protection threshold.

The MP3313 is available in a small WLCSP-12

(1.3mmx1.7mm) package.

FEATURES

 2.7 - 5.5V Input Voltage

 300mΩ, 42V Internal MOSFET

 3-Channel Current Sink, Each Channel

Enable/Disable Respectively

 LED Current up to 25mA in Backlighting

Mode

 LED Current up to 100mA in Flash Mode

 250µA - 25mA LED Current with ±3%

Accuracy

 ±1% Typical Current Matching

 Linear or Exponential Analog Dimming

 11-Bit Dimming Resolution

 Selectable Switching Frequency: 500kHz or

1MHz with Optional -12% Shift

 Auto-Switching Frequency (250kHz, 500kHz,

1MHz)

 Internal Soft Start (SS) to Reduce Inrush

Current

 Current-Limit Protection (0.75/1/1.25/1.5A)

 LED Open Protection (17/23/30/38V)

 LED Short Protection (2/3/5V)

 Available in a WLCSP-12 (1.3mmx1.7mm)

Package

APPLICATIONS

 Smart Phones

 Tablets

 GPS Receivers

 LCD Video Displays with One-Cell Li-Ion

Battery

All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive. For

MPS green status, please visit the MPS website under Quality Assurance.

“MPS”

and “The Future of Analog IC Technology” are registered trademarks of

Monolithic Power Systems, Inc.