Microchip MAQ3203YM Bruksanvisning
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MAQ3203
High- Brightness LED Driver Controller
with HighSide Current Sense-
Micrel Inc. • 2180 Fortune Drive • Jose, CA 95131 • USA • tel +1 (408) 9440800 • fax + 1 (408) 4741000 • San --http://www.micrel.com
April
20, 2015
Revision 1.2
General Description
The MAQ3203 is a hysteretic, stepdown, constant--
current, HighBrightness 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 highside current -
sensing and onchip currentsense amplifier delivers LED --
current with 5% accuracy. An external highside current±- -
sense resistor is used to set the output current.
The MAQ3203 offers a dedicated PWMinput (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 MAQ3203perates oover a junction temperature from
− °+°40C to 125C 8-and is available in an pin SOIC
p-ackage. The MAQ3203 is AECQ100 qualified for
automotive applications.
Datasheets and support documentation are available on
Micrel’s web site at: www.micrel.com.
Features
•-AECQ100 qualified
• 4.5V to 42V inputvoltage range
• >High efficiency (90%)
• ±5% LED current accuracy
• Dither enabled for low EMI
•- Highside current sense
• Dedicated dimming control input
• Hysteretic control (no compensation!)
• Up to 1.5MHz switching frequency
• Adjustable constant LED current
•- Overtemperature protection
• −°+°40C to 125C junction temperature range
Applications
• Automotive lighting
• Industrial lighting
Typical Application
MAQ3203 Step- Down LED Driver
Produktspecifikationer
| Varumärke: | Microchip |
| Kategori: | Inte kategoriserad |
| Modell: | MAQ3203YM |
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