SA60 Datasheet, PDF (1/4 Pages) Cirrus Logic – H-BRIDGE MOTOR DRIVER/AMPLIFIERS

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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
12-PIN POWER SIP
PACKAGE STYLE DP
Formed Leads Available
See package styles ED & EE
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
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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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