SM2001

© 2018 Silicon Mitus, Inc.

www.siliconmitus.com

Februay 2018

– Rev. 0.0.0

1 / 1

4 Channel White LED Driver

with Internal-switch Boost Regulator

Features

 5 V to 36 V Input Supply Voltage Range

 Maximum Output Adjustable up to 47 V

 High-Efficiency Step-up Regulator

. Peak-Current Mode Control

– Fast Transient

. 200 kHz to 1.4 MHz Adjustable Switching Frequency

. Built-in 50 V, 2.5 A, 0.18

Ω MOSFET

 Four LED Current Sources

. Full-Scale LED Current Adjustable up to 40 mA

. ± 1.5% Current Matching between Channels

. Headroom Control to Maximize Efficiency

 Dimming Control

. Wide PDIM Input Frequency: 100 Hz to 22 kHz

. Adjustable Output Dimming Frequency: 100 Hz to

22 kHz

. Selectable Dimming Control

 Direct PWM or Phase Shift PWM

 Protections

. Output Overvoltage Protection

. LED Open Circuit Protection

. Thermal Shutdown

Applications

 Notebook Backlighting

 LCD Monitor LED Backlighting

Description

The SM2001 is a high-efficiency white LED driver with an

internal-switch current mode step-up regulator. It drives up

to four channels of the series LED array with a ±1.5%

current regulation accuracy. Each current source for LED

driving is adjustable up to 40 mA. The step-up DC-DC

converter provides the regulated supply voltage for LED

driving. To reduce power loss, the SM2001 features the

headroom control which detects the lowest channel voltage

and uses to set the output voltage. The high switching

frequency of the converter makes it possible to use ultra-

small inductors and ceramic capacitors. The device

provides two brightness control methods

– phase shift

PWM and direct PWM

– and the dimming mode is selected

by an external dimming mode selection pin. In case of

phase shift PWM, output dimming frequency is

adjusted by an external resistor. The SM2001 features

multiple protections to protect the controller from fault

conditions.

Device Information

Part

Package

Size

SM2001

20 QFN

4 mm x 4 mm

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Silicon Mitus cannot assume any responsibility for the consequence of use of information furnished nor for any infringement of patents or

other rights of third parties which may result from its use. No Circuit patent licenses are implied. Silicon Mitus reserves the right to change

the circuitry and specifications without notice at any time. This publication supersedes and replaces all information previously supplied. Silicon

Mitus products are not authorized for use as critical components in life support devices or systems without the express written approval of

Silicon Mitus.

© 2018 Silicon Mitus, Inc. - Printed in Korea - All Rights Reserved