MIC3201YME Micrel Inc, MIC3201YME Datasheet

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MIC3201YME

Manufacturer Part Number
MIC3201YME
Description
IC LED DRIVER 8ESOIC
Manufacturer
Micrel Inc
Type
HBLED Driverr
Datasheet

Specifications of MIC3201YME

Topology
PWM, Step-Down (Buck)
Constant Current
Yes
Number Of Outputs
1
Internal Driver
Yes
Type - Primary
General Purpose
Type - Secondary
High Brightness LED (HBLED)
Frequency
1MHz
Voltage - Supply
6 V ~ 20 V
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width) Exposed Pad, 8-eSOIC. 8-HSOIC
Operating Temperature
-40°C ~ 85°C
Current - Output / Channel
1A
Internal Switch(s)
Yes
Efficiency
90%
Led Driver Application
Architectural, Industrial, Ambient Lighting
No. Of Outputs
1
Output Current
1A
Input Voltage
6V To 20V
Dimming Control Type
PWM
Operating Temperature Range
-40°C To
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Output
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Other names
576-3659-5
MIC3201YME
General Description
The MIC3201 is a hysteretic step-down, constant-current,
High-Brightness LED (HB LED) driver capable of driving
up to four, 1A LEDs. It provides an ideal solution for
interior/exterior lighting, architectural and ambient lighting,
LED bulbs, and other general illumination applications.
The MIC3201 operates with an input voltage range from
6V to 20V. 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 MIC3201 offers a dedicated PWM input (DIM) which
enables a wide range of pulsed dimming. A high switching
frequency operation up to 1MHz allows the use of smaller
external components minimizing space and cost.
The MIC3201 operates over a junction temperature range
of -40°C to +125°C and is available in an 8-pin ePAD
SOIC package.
Datasheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
_________________________________________________________________________________________________________________________
Typical Application
February 2011
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 •
MIC3201 Step-down LED Driver Circuit
Features
• 6.0V to 20V input voltage range
• High efficiency (>90%)
• ± 5% LED current accuracy
• High-side current sense
• Dedicated dimming control input
• Hysteretic control (no compensation!)
• 1A internal power switch
• Up to 1MHz switching frequency
• Adjustable constant LED current
• 5V on board regulator
• Over temperature protection
• –40°C to +125°C junction temperature range
• Available in an 8-Pin ePAD SOIC package
Applications
• Architectural, industrial, and ambient lighting
• LED bulbs
• Indicators and emergency lighting
• Street lighting
• Channel letters
• 12V lighting systems (MR-16 bulbs, under cabinet
lighting, garden/pathway lighting)
High Brightness LED Driver with
High-Side Current Sense
MIC3201
http://www.micrel.com
M9999-021011-B

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MIC3201YME Summary of contents

Page 1

... Datasheets and support documentation can be found on Micrel’s web site at: www.micrel.com. _________________________________________________________________________________________________________________________ Typical Application Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • February 2011 High Brightness LED Driver with Features • ...

Page 2

... LX EP GND February 2011 Marking Junction Temp. Range MIC3201YME -40°C to +125°C 8-Pin ePAD SOIC (ME) Pin Function Voltage Regulator Output. The V pin supplies the power to the internal circuitry. The VCC in CC the output of a linear regulator which is powered from VIN. A 1µF ceramic capacitor is recommended for bypassing and should be placed as close as possible to the VCC and AGND pins ...

Page 3

Micrel, Inc. Absolute Maximum Ratings PGND/AGND ................................ -0.3V to +22V PGND/AGND ..................................-0. DIM PGND/AGND ................................. -0. PGND/AGND ..................................... -0.3V to ...

Page 4

Micrel, Inc. Typical Characteristics 1 LED Efficiency vs. Input Voltage 350mA INPUT VOTLAGE (V) 2 LED Current vs. Input Voltage 1200 1000 1A 800 600 400 ...

Page 5

Micrel, Inc. R DSON vs. Input Voltage 400 350 300 250 200 150 100 25°C 50 OUT INPUT VOLTAGE ( 1.0A CASE vs. Input Voltage LED 40 ...

Page 6

Micrel, Inc. Functional Characteristics February 2011 6 MIC3201 M9999-021011-B ...

Page 7

Micrel, Inc. February 2011 7 MIC3201 M9999-021011-B ...

Page 8

Micrel, Inc. Functional Diagram Functional Description The MIC3201 is a hysteretic step-down regulator which regulates the LED current over wide input voltage range and capable of driving up to four, 1A LEDs in series. The device operates from a 6V ...

Page 9

Micrel, Inc. Application Information The MIC3201 is a hysteretic step-down constant-current High-Brightness LED (HB LED) driver. The internal block diagram is shown in Figure 1. The MIC3201 is composed of a current sense comparator, voltage and current reference, 5V regulator, ...

Page 10

Micrel, Inc. PCB Layout Guideline Warning!!! To minimize EMI and output noise, follow these layout recommendations. PCB Layout is critical to achieve reliable, stable and efficient performance. A ground plane is required to control EMI and minimize the inductance in ...

Page 11

Micrel, Inc. Ripple Measurements To properly measure ripple on either input or output of a switching regulator, a proper ring in tip measurement is required. Standard oscilloscope probes come with a grounding clip long wire with an alligator ...

Page 12

Micrel, Inc. Evaluation Board Schematic February 2011 12 MIC3201 M9999-021011-B ...

Page 13

... GRM32DR71E106KA12L C3225X7R1E106M 08053D105KAT2A C3 GRM216R61E105KA12D C2012X7R1E105K 08055A271JAT2A C4 GQM2195C1H271JB01D SS24-TP D1 SS24 L1 CDRH8D43NP-220NC R1 CSR 1/2 0 R2, R3 CRCW08051003FKEA R4 CRCW08052R20FKEA U1 MIC3201YME Notes: 1. AVX: www.avx.com 2. Murata: www.murata.com 3. TDK: www.tdk.com 4. MCC: www.mccsemi.com 5. Fairchild: www.fairchildsemi.com 6. Sumida Tel: www.sumida.com 7. Stackpole Electronics: www.seielect.com 8. Vishay: www.vishay.com 9. Micrel, Inc.: www.micrel.com February 2011 Manufacturer ...

Page 14

Micrel, Inc. PCB Layout Recommendations Top Assembly February 2011 Top Layer Bottom Layer 14 MIC3201 M9999-021011-B ...

Page 15

Micrel, Inc. Package Information February 2011 8-Pin ePAD SOIC (ME) 15 MIC3201 M9999-021011-B ...

Page 16

Micrel, Inc. Recommended Landing Pattern MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB Micrel makes no representations or warranties with respect to the accuracy or completeness of the information ...

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