Instrukcja obsługi Microchip MAQ3203

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 2020 Microchip Technology Inc.DS20006407A-page 1

MAQ3203

Features

•AEC-Q100 Qualified

•4.5V to 42V Input Voltage Range

•High Efficiency (>90%)

•±5% LED Current Accuracy

•Dither Enabled for Low EMI

•High-Side Current Sense

•Dedicated Dimming Control Input

•Hysteretic Control (No Compensation)

•Up to 1.5MHz Switching Frequency

•Adjustable Constant LED Current

•Overtemperature Protection

•–40°C to +125°C Junction Temperature Range

Applications

•Automotive Lighting

•Industrial Lighting

General Description

The MAQ3203 is a hysteretic, step-down,

constant-current, high-brightness LED (HB LED)

driver. It provides an ideal solution for interior/exterior

lighting, architectural and ambient lighting, LED bulbs,

and other general illumination applications.

The MAQ3203 is well suited for lighting applications

that require a wide input voltage range. The hysteretic

control gives good supply rejection and fast response

during load transients and PWM dimming. The

high-side current sensing and on-chip current-sense

comparator delivers LED current with ±5% accuracy.

An external high-side current-sense resistor is used to

set the output current.

The MAQ3203 offers a dedicated PWM input (DIM)

that enables a wide range of pulsed dimming. A

high-frequency switching operation up to 1.5MHz

allows the use of smaller external components

minimizing space and cost. The MAQ3203 offers

frequency dither feature for EMI control.

The MAQ3203 operates over a junction temperature

from –40°C to +125°C and is available in an 8-pin SOIC

package. The MAQ3203 is AEC-Q100 qualified for

automotive applications.

Package Type

MAQ3203

8-Lead SOIC (M)

(Top View)

1VCC

CS

VIN

AGND

8DRV

PGND

DIM

EN

7

6

5

2

3

4

High-Brightness LED Driver Controller with High-Side Current Sense

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