Microchip MAQ3203YM Manual

Microchip Ikke kategoriseret MAQ3203YM

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Side 1/23
MAQ3203
High-Brightness LED Driver Controller
with High-Side Current Sense
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
April
20, 2015
Revision 1.2
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
requiring 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 amplifier 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) which
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.
Datasheets and support documentation are available on
Micrel’s web site at: www.micrel.com
.
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
• Over-temperature protection
• −40°C to +125°C junction temperature range
Applications
• Automotive lighting
• Industrial lighting
Typical Application
MAQ3203 Step-Down LED Driver

Produkt Specifikationer

Mærke: Microchip
Kategori: Ikke kategoriseret
Model: MAQ3203YM

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