MIC4605 Datasheet, PDF (1/25 Pages) Micrel Semiconductor – 85V Half-Bridge MOSFET Drivers

MIC4605
85V Half-Bridge MOSFET Drivers
with Adaptive Dead Time and
Shoot-Through Protection
General Description
The MIC4605 is an 85V half-bridge MOSFET driver that
features adaptive-dead-time and shoot-through protection.
The adaptive-dead-time circuitry actively monitors the half-
bridge outputs to minimize the time between high-side and
low-side MOSFET transitions, thus maximizing power
efficiency. Anti-shoot-through circuitry prevents erroneous
inputs and noise from turning both MOSFETS on at the
same time.
The MIC4605 also offers a wide 5.5V to 16V operating
supply range to maximize system efficiency. The low 5.5V
operating voltage allows longer run times in battery-
powered applications. Additionally, the MIC4605’s
adjustable gate drive sets the gate drive voltage to VDD
for optimal MOSFET R_DS(ON), which minimizes power loss
due to the MOSFET’s R_DS(ON).
The MIC4605 is available in an 8-pin SOIC package and a
tiny 10-pin 2.5mm × 2.5mm TDFN package. Both
packages have an operating junction temperature range of
–40°C to +125°C.
Datasheets and support documentation are available on
Micrel’s web site at: www.micrel.com.
Features
• 5.5V to 16V gate drive supply voltage range
• Advanced adaptive-dead-time
• Intelligent shoot-through protection
− MIC4605-1: Dual TTL inputs
− MIC4605-2: Single PWM input
• Enable input for on/off control
• On-chip bootstrap diode
• Fast 35ns propagation times
• Drives 1000pF load with 20ns rise and fall times
• Low power consumption: 135µA quiescent current
• Separate high- and low-side undervoltage protection
• –40°C to +125°C junction temperature range
Applications
• Fans
• Power inverters
• High-voltage step-down regulators
• Half-, full-, and three-phase bridge motor drives
• Appliances
• E-bikes
MIC4605 Door Lock/Unlock Module
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
November 11, 2013
Revision 1.0