Használati útmutató Microchip MIC4104

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MIC4103/4104

100V Half-Bridge MOSFET Drivers with

3A/2A Sinking/Sourcing Current

General Description

T--he MIC4103 and MIC4104 are highfrequency, 100V half

bridge MOSFET drivers with faster turnoff characteristics -

than the MIC4100 and MIC4101 drivers. They feature fast

24ns propagation delay times and 6ns driver fall times.

The lowside and highside gate drivers are independently --

controlled and matched to within 3ns (typical). The

MIC4103 has CMOS input thresholds and the MIC4104

has TTL input thresholds. The MIC4103/4 include a high-

voltage internal diode that charges the highside gate drive -

bootstrap capacitor.

A robust, highspeed, and lowpower level shifter provides --

clean level transitions to the highside output. The robust -

operation of the MIC4103/4 ensuresthe outputs are not

affected by supply glitches, HS ringing below ground, or

HS slewing with high-speed voltage transitions.

Undervoltage protection is provided on both the low-side

and high-side drivers.

The MIC4103 and MIC4104 are available in an 8- pin SOIC

package with an operating junction temperature range of

–°° 40C to +125C.

Datasheets and support documentation are available on

Micrel’s web site at: www.micrel.com.

Features

•Asymmetrical, low impedance outputs drive 1000pF

load with 10ns rise times and 6ns fall times

• Bootstrap supply maximum voltage to 118V DC

• Supply voltage up to 16V

•--Drives high and lowside NChannel MOSFETs with

independent inputs

• CMOS input thresholds (MIC4103)

• TTL input thresholds (MIC4104)

•- Onchip bootstrap diode

• Fast 24ns propagation times

• Low power consumption

• Supply undervoltage protection

• ΩΩTypical 2.5 -pullup and 1.25 -pulldown output driver

resistance

•–°° 40C to +125C junction temperature range

Applications

•- Highvoltage buck converters

•- - Fulland halfbridge power topologies

• Active clamp forward converter

• Two switch forward topologies

• Interface to digital controllers

Typical Application

100V Buck Regulator Solution

Micrel Inc. • 2180 Fortune Drive • Jose, CA 95131 • USA • tel +1 (408) 9440800 • fax + 1 (408) 4741000 • San --http://www.micrel.com

November 12, 2014 Revision 3.0

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