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

• WIDE SUPPLY RANGE: UP TO 80V

• 10A CONTINUOUS OUTPUT

• ISOLATED CASE ALLOWS DIRECT HEATSINKING

• FOUR QUADRANT OPERATION, TORQUE

CONTROL CAPABILITY

• INTERNAL/PROGRAMMABLE PWM FREQUENCY

GENERATION

APPLICATIONS

• BRUSH TYPE MOTOR CONTROL

• CLASS D SWITCHMODE AMPLIFIER

• REACTIVE LOADS

• MAGNETIC COILS (MRI)

• ACTIVE MAGNETIC BEARING

• VIBRATION CANCELLING

DESCRIPTION

The SA60 is a pulse width modulation amplifier that can sup-

ply 10A 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 PWM circuitry is internal as

well, leaving the user to only provide an analog signal for the

motor speed/direction, or audio signal for switchmode audio

amplification. The internal PWM frequency can be programmed

by an external integrator capacitor. Alternatively, the user may

provide an external TTL-compatible PWM signal for simultane-

ous amplitude and direction control for four quadrant mode.

BLOCK DIAGRAM

TYPICAL APPLICATION

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A wide variety of loads can be driven in either the voltage

mode or the current mode. The most common applications

use three external blocks: a low pass filter converting pulse

width data to an analog output, a difference amplifier to moni-

tor voltage or current and an error amplifier. Filter inductors

must be suitable for square waves at the switching frequency

(laminated steel is generally not acceptable). Filter capacitors

must be low ESR and rated for the expected ripple current. A

difference amplifier with gain of less than one translates the

differential output voltage to a single feedback voltage. Dashed

line connections and a higher gain difference amplifier would

be used for current control. The error amplifier integrates the

difference between the input and feedback voltages to close

the loop.

EXTERNAL CONNECTIONS

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12-PIN POWER SIP

PACKAGE STYLE DP

Formed Leads Available

See package styles ED & EE