APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com

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FEATURES

• LOW COST COMPLETE H-BRIDGE

• SELF-CONTAINED SMART LOWSIDE/HIGHSIDE DRIVE

CIRCUITRY

• SINGLE SUPPLY OPERATION

• WIDE SUPPLY RANGE: UP TO 80V

• 5A CONTINUOUS OUTPUT

• HERMETIC SEALED PACKAGE

• HIGH EFFICIENCY: 95%

• FOUR QUADRANT OPERATION, TORQUE

CONTROL CAPABILITY

APPLICATIONS

• BRUSH TYPE MOTOR CONTROL

• CLASS D SWITCHMODE AMPLIFIER

• REACTIVE LOADS

• MAGNETIC COILS (MRI)

• ACTIVE MAGNETIC BEARING

• VIBRATION CANCELLING

DESCRIPTION

The SA51 is a pulse width modulation amplifier that can sup-

ply 5A continuous current to the load. The full bridge amplifier

can be operated over a wide range of supply voltages. All of

the drive/control circuitry for the lowside and highside switches

are internal to the hybrid. The user provides a TTL compatible

PWM signal for simultaneous amplitude and direction control

in four quadrant mode. The internal circuitry will provide proper

deadtime protection for each half bridge. All N-channel FETs

mean the best efficiency for the size, both in terms of on-re-

sistance and switching capability. For an idle/sleep mode or

for fault protection, a TTL compatible disable pin is provided

so as to shut down all four transistors. The SA51 is packaged

in a space efficient isolated 8-pin TO-3 that can be directly

connected to a heatsink.

BLOCK DIAGRAM

TYPICAL APPLICATION

EXTERNAL CONNECTIONS

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8-PIN TO-3

PACKAGE STYLE CE