SA55 Datasheet, PDF (1/2 Pages) List of Unclassifed Manufacturers – PULSE WIDTH MODULATION AMPLIFIER

PULSE WIDTH MODULATION AMPLIFIER
SA55
MICROTECHNOLOGY
HTTP://WWW.APEXMICROTECH.COM
FEATURES
PRELIMINARY
• DELIVERS UP TO 5A CONTINUOUS OUTPUT
• OPERATES AT SUPPLY VOLTAGES TO 55V
• TTL AND CMOS COMPATIBLE INPUTS
• NO “SHOOT-THROUGH” CURRENT
• THERMAL WARNING FLAG OUTPUT AT 145° C
• THERMAL SHUTDOWN (OUTPUTS OFF) AT 160° C
• INTERNAL CLAMP DIODES
• SHORTED LOAD PROTECTION
• INTERNAL CHARGE PUMP WITH EXTERNAL BOOTSTRAP
CAPABILITY
(800) 546-APEX
[phone]
APPLICATIONS
• DC AND STEPPER MOTOR DRIVES
• POSITION AND VELOCITY SERVOMECHANISMS
• FACTORY AUTOMATION ROBOTS
• NUMERICALLY CONTROLLED MACHINERY
• COMPUTER PRINTERS AND PLOTTERS
DESCRIPTION
The SA55 is a 5A H-Bridge designed for motion control
applications. The device is built using a multi-technology
process which combines bipolar and CMOS control circuitry
with DMOS power devices on the same monolithic structure.
Ideal for driving DC and stepper motors; the SA55 accomodates
peak output currents up to 10A. An innovative circuit which
facilitates low-loss sensing of the output current has been
implemented.
BLOCK DIAGRAM
ILIM
PWM
DIRECTION
BRAKE
THERMAL
FLAG
V_S
OUTPUT BOOTSTRAP 1
BOOTSTRAP 2
THERMAL
SENSING
UNDER
VOLTAGE
LOCKOUT
CHARGE
PUMP
DRIVE
CURRENT
SENSING
CHARGE
PUMP
DRIVE
BRIDGE
DRIVER
GROUND
OUTPUT 1
CURRENT
SENSE OUT
OUTPUT 2
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