Apex SA50 Datasheet

H/BRIDGE MOTOR DRIVER/AMPLIFIER

MICROTECHNOLOGY

HTTP://WWW.APEXMICROTECH.COM (800) 546-APEX [phone]

FEA TURES

• 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: 97%

• FOUR QUADRANT OPERATION, TORQUE
CONTROL CAPABILITY

• INTERNAL PWM GENERATION

APPLICATIONS

• BRUSH TYPE MOTOR CONTROL

• CLASS D SWITCHMODE AMPLIFIER

• REACTIVE LOADS

• MAGNETIC COILS (MRI)

• ACTIVE MAGNETIC BEARING

• VIBRATION CANCELLING

SA50

TYPICAL APPLICATION

Vcc

AUDIO

INPUT

SA50

+V

S

DESCRIPTION

The SA50 is a pulse width modulation amplifier that can

supply 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 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 SA50 is packaged in a
space efficient isolated 8-pin TO-3 that can be directly con­nected to a heatsink.

+V

BLOCK DIAGRAM

V

CC

(+12V)

45KHz

PWM

GENERATOR

INPUT

GND

H-BRIDGE

CIRCUITRY

DRIVE

RSENSE B

S

(LOAD)

BA

RSENSE A

(CURRENT)

GND

Vcc

ANALOG

INPUT

GND

SA50

EXTERNAL CONNECTIONS

+V

S

3

A OUT

RSENSE A

4

TOP VIEW

5

6

Vcc

GND

+V

B OUT

2

7

S

DC MOTOR

RSENSE B

1

8

INPUT

SPEAKER

APEX MICROTECHNOLOGY CORPORATION • TELEPHONE [phone] • FAX [phone] • ORDERS [phone] • EMAIL [e-mail]

SA50

ABSOLUTE MAXIMUM RATINGS

SPECIFICATIONS

ABSOLUTE MAXIMUM RATINGS

SUPPLY VOLTAGE, +V
OUTPUT CURRENT, peak 7A
LOGIC SUPPLY VOLTAGE, Vcc 16V
POWER DISSIPATION, internal 120W
TEMPERATURE, pin solder - 10s 300°C
TEMPERATURE, junction
TEMPERATURE, storage –65 to +150°C
OPERATING TEMPERATURE RANGE, case –65 to +125°C
INPUT VOLTAGE +1 to Vcc – 1.5 Vdc

S

3

80V

1

150°C

SPECIFICATIONS

PARAMETER TEST CONDITIONS
INPUT

ANALOG INPUT VOLTAGES Vcc = 12V

MOTOR A, B = 50% Duty Cycle 6 Vdc
MOTOR A = 100% Duty Cycle High 8 Vdc
MOTOR B = 100% Duty Cycle High 4 Vdc

OUTPUT

Vds (ON) VOLTAGE, each MOSFET Ids = 5A 1.25 1.8 Vdc
TOTAL Ron, both MOSFETs 0.5 Ω
EFFICIENCY, 5A OUTPUT +VS = 80V 97 %
SWITCHING FREQUENCY 40 45 50 Khz
CURRENT, continuous 5 A
CURRENT, peak t = 100 msec 7 A
SWITCHING CHARACTERISTICS

RISE TIME 36 54 nS
FALL TIME 170 250 nS
DEAD TIME 100 nS

4

+VS = 28V, Vcc = 12V, Ic =2A

2

MI N TYP MAX UNITS

POWER SUPPLY

+VS VOLTAGE +VS Current = Load Current 80 Vdc
Vcc VOLTAGE 9 12 16 Vdc
Vcc CURRENT Vcc = 12Vdc 15 20 mA

THERMAL

RESISTANCE, junction to case Full temp range, for each transistor 2.0 °C/W
RESISTANCE, junction to air Full temperature range 30 °C/W
TEMPERATURE RANGE, case –25 +85 °C

NOTES: 1. Each of the two active output transistors can dissipate 60W.

CAUTION

3

2. Unless otherwise noted: TC = 25°C, Vcc = 12Vdc.

3. Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power
dissipation to achieve high MTTF. For guidance, refer to the heatsink data sheet.

4. Guaranteed but not tested.

The SA50 is constructed from MOSFET transistors. ESD handling procedures must be observed.
The internal substrate contains beryllia (BeO). Do not break the seal. If accidentally broken, do not crush, machine, or

subject to temperatures in excess of 850°C to avoid generating toxic fumes.

WARNING—AMPLIFIER PROTECTION

The SA50 contains an internal logic chip that turns on and
turns off output MOSFET drivers at a certain sequence. Noises
or oscillation caused by external wiring inductance, lack of
proper power supply bypass capacitors, ground, supply and
local internal loops, may be fed back to this logic chip and
cause it to turn on one or more MOSFET drivers at the wrong

time, thus destroying the SA50. A well laid out PC board with

low impedance copper ground plane is necessary for the
SA50 to function properly. The Apex EK-SA50 evaluation

board is recommended for fast and easy breadboarding of
circuits using the SA50.

APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: [phone]