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Part: SA51
Category:
Analog & Mixed-Signal Processing
-> Amplifiers
-> Audio/Power Amplifiers
Description: PWM Amplifier
Company: Apex Microtechnology Corporation
Datasheet: Download SA51 datasheet File size : 124 kB
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Datasheet text preview:
H/BRIDGE MOTOR DRIVER/AMPLIFIER
SA51
MICROTECHNOLOGY
HTTP://WWW.APEXMICROTECH.COM
(800) 546-APEX
(800) 546-2739
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
TYPICAL APPLICATION
+VS Vcc
PWM INPUT SA51 DISABLE INPUT SPEAKER
DESCRIPTION
The SA51 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 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-resistance 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.
GND
Vcc
+VS
PWM INPUT SA51 DISABLE INPUT DC MOTOR
BLOCK DIAGRAM
+VS
GND
(LOAD) B A
EXTERNAL CONNECTIONS
VCC
3
B OUT
2 1
+VS
VCC (+12V) DISABLE (PWM) INPUT H-BRIDGE DRIVE CIRCUITRY RSENSE (CURRENT)
DISABLE GND
4
TOP VIEW
5 6 8 7
RSENSE
INPUT
A OUT
GND
APEX MICROTECHNOLOGY CORPORATION · TELEPHONE (520) 690-8600 · FAX (520) 888-3329 · ORDERS (520) 690-8601 · EMAIL prodlit@apexmicrotech.com
SA51
ABSOLUTE MAXIMUM RATINGS
SUPPLY VOLTAGE, +VS OUTPUT CURRENT, peak LOGIC SUPPLY VOLTAGE, Vcc POWER DISSIPATION, internal TEMPERATURE, pin solder - 10s TEMPERATURE, junction3 TEMPERATURE, storage OPERATING TEMPERATURE RANGE, case INPUT VOLTAGE, INPUT INPUT VOLTAGE, DIS
ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS
80V 5 7A 16V 120W1 300°C 150°C 65 to +150°C 65 to +125°C 0 to Vcc 0 to Vcc
SPECIFICATIONS
PARAMETER INPUT PWM PULSE LOW VOLTAGE PWM PULSE HIGH VOLTAGE PWM FREQUENCY DISABLE ON DISABLE OFF OUTPUT Vds (ON) VOLTAGE, each MOSFET TOTAL Ron, both MOSFETs EFFICIENCY, 5A OUTPUT CURRENT, continuous CURRENT, peak SWITCHING CHARACTERISTICS4 RISE TIME FALL TIME DEAD TIME POWER SUPPLY +VS VOLTAGE5 Vcc VOLTAGE Vcc CURRENT THERMAL3 RESISTANCE, junction to case RESISTANCE, junction to air TEMPERATURE RANGE, case Full temp range, for each transistor Full temperature range 25 2.0 30 +85 °C/W °C/W °C +VS Current = Load Current 9.5 Vcc = 12Vdc 12 11 80 15 18 Vdc Vdc mA Ids = 5A +VS = 80V T = 100ms +VS = 28V, Vcc = 12V, Ic =2A 5 7 36 170 100 54 250 1.25 0.5 95 1.8 Vdc % A A nS nS nS 0 3.6 45 3.6 0 0.6 5.0 500 V CC 0.6 Vdc Vdc KHz Vdc Vdc TEST CONDITIONS2 MIN TYP MAX UNITS
NOTES: 1. Each of the two active output transistors can dissipate 60W. 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. 5. Derate to 70V below TC = +25°C.
CAUTION
The SA51 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 SA51 contains an internal logic chip that turns on and turns off output MOSFET drivers at a certain sequence. Noise 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 SA51. A well laid out PC board with low impedance copper ground plane is necessary for the SA51 to function properly. The Apex EK-SA51 evaluation board is recommended for fast and easy breadboarding of circuits using the SA51.
APEX MICROTECHNOLOGY CORPORATION · 5980 NORTH SHANNON ROAD · TUCSON, ARIZONA 85741 · USA · APPLICATIONS HOTLINE: 1 (800) 546-2739
TYPICAL PERFORMANCE GRAPHS
SA51
INPUT CURRENT VS TEMP
1.05
PWM BIAS CURRENT, (µA) SUPPLY VOLTAGE, VS (V)
Typical performance curves with Vcc = 12V, PWM at 45kHZ and case temperature at 25°C, unless otherwise specified.
INTERNAL POWER DISSIPATION, (W)
POWER DERATING
60 50 40 30 20 10 0 0 EACH OUTPUT TRANSISTOR 25 50 75 100 125 CASE TEMPERATURE, T C (°C) 0.95 0.85 0.75 0.65 0.55 0.45 0.35
EFFICIENCY CONTOURS
80 70 60 50 40 30 20 10 0 1 4 2 3 LOAD CURRENT, (A)
90%
97
%
95%
80%
0.25 40 20 0 20 40 60 80 100 120 CASE TEMPERATURE, (°C)
70%
5
OUTPUT RESISTANCE, (NORMALIZED)
OUTPUT RESISTANCE DRIFT
2.5
DRAIN-TO-SOURCE CAP, (pF)
H-BRIDGE FET CAPACITANCE
500 400
EFFICIENCY, (%)
EFFICIENCY VS LOAD CURRENT
100
VS = 80 V
2 1.5 1 0.5 0 60 20 20 60 100 140 180 JUNCTION TEMPERATURE (°C)
97 94 91
V
S
300 200 100 0 1 2 5 10 20 50 100 DRAIN-TO-SOURCE VOLTAGE, (V) 15
VS = 60V VS = 40V
88 85
=2
0V
1
2 3 4 LOAD CURRENT, (A)
5
VOLTAGE DROP (BOTH MOSFETS)
5 4 3 2 1 0 0 35°C CASE TEMPERATURE
Vcc CURRENT, (mA)
Vcc CURRENT VS PWM FREQ
Vcc=12V
Vcc CURRENT, (mA)
Vcc CURRENT VS VOLTAGE
14.0 12.0 10.0 8.0 6.0 4.0
VOLTAGE DROP, (V)
85°C 110°C 60°C
14 13 12 11 10
1 2 3 4 OUTPUT CURRENT, (A)
5
0
400 200 PWM FREQUENCY (kHz)
600
2.0 9
10
11 12 13 14 15 Vcc VOLTAGE (V)
16
APEX MICROTECHNOLOGY CORPORATION · TELEPHONE (520) 690-8600 · FAX (520) 888-3329 · ORDERS (520) 690-8601 · EMAIL prodlit@apexmicrotech.com
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