(800) 546-APEX (800) 546-2739 FEATURES 10.8V Supply Vol

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(800) 546-APEX (800) 546-2739 FEATURES 10.8V Supply Vol

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MSA66
(800) 546-APEX
(800) 546-2739
FEATURES
10.8V Supply Voltage (7.5-16V continuous output current 4-quadrant Anti Shoot-Through Design 100% Duty Cycle from Startup Conditions User Selectable Frequency Nominal Internal External Oscillator Operation Operation with single supply 16V, Input Dynamic Range -10V True Differential Analog Input User Available regulator Logic Shut Down Mode Turns Power FETs Economical "Open Frame" Package
34-pin PACKAGE STYLE
DESCRIPTION
MSA66 amplifier pulse width modulated amplifier that deliver 400W continuously load. full bridge output amplifier operated from single power supply over wide range voltages, voltage motor supply within rating, common supply used both motor supply VCC. 4-quadrant allows amplifier transition smoothly through volts required deceleration control position control applications. input amplifier true differential amplifier which allows operation with ground referenced inputs swinging from -10V 10V, matching output characteristics many motor control chip-sets. Since input true differential, MSA66 interfaced single polarity input signals well. Power source terminals brought current sensing. MSA66 serve oscillator several others synchronized PWM. section Oscillator details. package, modular 34-pin DIP, constructed surface mount components dielectrically isolated aluminum substrate. package outline details.
APPLICATIONS
Brush Motor Control Reactive Loads Sub-woofer Driver
EQUIVALENT SCHEMATIC
ANALOG REF. IN12 POWER RESET
GATE DRIVE
GATE DRIVE
GATE DRIVE LOGIC
OSCIN OSCOUT OSCSJ
PULSE WIDTH MODULATOR OSCILLATOR
20,21
GATE DRIVE
GATE DRIVE
ISENSEA ISENSEB PGND
APEX MICROTECHNOLOGY CORPORATION TELEPHONE (520) 690-8600 (520) 888-3329 ORDERS (520) 690-8601 EMAIL prodlit@apexmicrotech.com
MSA66
ABSOLUTE MAXIMUM RATINGS
ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS
SUPPLY VOLTAGE, SIGNAL SUPPLY, OUTPUT CURRENT, continuous INPUT VOLTAGE TEMPERATURE, solder, TEMPERATURE, junction1 TEMPERATURE RANGE, storage OPERATING TEMPERATURE, mounting surface
-10V 300°C. 150°C 105°C 85°C UNIT
PARAMETER GENERAL OVERALL GAIN SWITCHING FREQENCY EFFICIENCY2 THERMAL RESISTANCE JUNCTION CASE INPUT DIFFERENTIAL INPUT RESISTANCE COMMON MODE INPUT RESISTANCE INPUT COMMON MODE VOLTAGE RANGE COMMON MODE REJECTION RATIO DIFFERENTIAL OFFSET LOGIC Ground OUTPUT RAIL RON3 BOTTOM RAIL RON3 TOTAL RON3 CONTINUOUS LOAD CURRENT PEAK LOAD CURRENT DISSIPATION2 Single MSA66
TEST CONDITIONS 25°C mounting surface temperature internal resistors external capacitor 80V, kHz, load inductance, VCC, Full temperature range, each
0.095VS
°C/W
2.65
internal resistors internal resistors
0.383 0.293 0.673
80V, 15V, 1mHy, kHz, I(+5) 400mA Includes 400mA user current from 55.4
POWER SUPPLY Output user Current Current4 Current NOTES:
10.8 4.75 Continuous current
5.25
Available user
Long term operation maximum junction temperature will result reduced product life. Derate internal power dissipation achieve high MTTF. Power dissipation caused from included; this power sizing heat sink. This rating 150°C junction temperature. Maximum value includes 400mA supplied external loads regulator.
APEX MICROTECHNOLOGY CORPORATION 5980 NORTH SHANNON ROAD TUCSON, ARIZONA 85741 APPLICATIONS HOTLINE: (800) 546-2739
MSA66
INTERNAL POWER DISSAPATION,
TYPICAL PERFORMANCE GRAPHS
POWER DERATING
LOAD CURRENT, RAIL OUTPUT
CONTINUOUS LOAD CURRENT
CASE TEMPERATURE, (°C)
CASE TEMPERATURE, (°C)
OUTPUT CURRENT
CURRENT, (mA) MOUNTING SURFACE TEMP. (°C)
EFFICIENCY OUTPUT
FREQUENCY,
APEX MICROTECHNOLOGY CORPORATION TELEPHONE (520) 690-8600 (520) 888-3329 ORDERS (520) 690-8601 EMAIL prodlit@apexmicrotech.com
OPERATING CONSIDERATIONS
MSA66
Description Unregulated high current motor supply voltage Return line high motor current supply voltage Control circuit power Signal/logic ground Regulated Logic Supply Connects mounting surface Half bridge output driving motor coil Half bridge output driving motor coil Source N-rail half bridge Source N-rail half bridge Logic input, enables MSA66 which otherwise tri-state. Input comparators Output integrating amplifier, this output must connected form oscillator. Summing junction integrating amplifier. capacitor placed between lower frequency. Input differential amplifier Input differential amplifier Numbers
Signal Pgnd Ground ISENSEA ISENSEB ININ+
GENERAL
Please read Application Note "General Operating Considerations" Application Note "PWM Basics" helpful information power supplies, heat-sinking, bypassing, grounding mounting. Visit www.apexmicrotech.com design tools that help automate filter design heat-sink selection. Application Notes Technical Seminar sections contain wealth information specific types applications. Information package outlines, heat-sinks, mounting hardware other accessories located Packages Accessories section. Evaluation kits available most Apex product models; consult Evaluation section details.
floating; with heatsink grounded through wiring, with heatsink connected short jumper from System considerations will determine approach.
BYPASSING
power supply terminals bypassed internally with 0.1µf capacitor. additional switching regulator grade electrolytic capacitor should installed between PGND. order keep minimum 50µf greater capacitor recommended, should mounted close MSA66 terminals possible.
OSCILLATOR
internal oscillator used generating MSA66. This oscillator hysteresis oscillator formed from active integrator comparator. complete oscillator circuit feedback path this oscillator must closed connecting OUT, This oscillator nominal frequency 30kHz with tolerance kHz. frequency lowered adding capacitor, CEXTERNAL from OUT, nominal frequency determined using following formula: F=30kHz (1000pf/(1000pf+CEXTERNAL))
GROUNDING
Switching amplifiers notorious noise problems caused improper grounding power supply filtering. MSA66 Apex taken design steps minimize these problems; however thought care should used power supply ground wiring filtering. Refer Application Note1 "General Operating Considerations" Application Note "PWM Basics" helpful information regarding power supplies, heat sinking, grounding. high power ground amplifier electrically connected signal ground; this allows tree grounding system used. Signal power must kept within 0.5V each other insure adequate gate drive output FETS. Using tree grounding system avoid frequency ground loops, tying signal ground power ground MSA66 both work MSA66 concerned; system considerations will determine which system best. Doing both same time often creates ground loop noise problems. mounting surface connected connected through ceramic capacitor. MSA66's have operated satisfactorily with heatsink
EXTERNAL
Alternatively triangle wave from external source used generating PWM. this case pins connected; external triangle wave must have negative level 0.5V, positive level 4.5V, frequency less. oscillator MSA66 serve "external source" others. This operation requires that OUT, MSA66 connected itself MSA66s being clocked.
APEX MICROTECHNOLOGY CORPORATION 5980 NORTH SHANNON ROAD TUCSON, ARIZONA 85741 APPLICATIONS HOTLINE: (800) 546-2739
MSA66
OUTPUT ENABLE
MSA66 must enabled putting Otherwise power FETs turned off. Only gate drive affected, Pulse Width Modulator continues operate when
ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS
AMPLIFIER OPERATION
MSA66 generates differential output voltage 2(VS input swing. Thus differential gain example, with gain calculated (80V (5A*(0.205 0.105)))/10 input amplifier designed operate with either below ground above VCC. sacrifice gain equivalent offset this extended greater voltage adding resistor each input. resistor will halve gain double offset, allow operation below ground above VCC. differential structure MSA66 allows operation single ended input referenced voltage within dynamic range. Either input serve reference input.
magnitude current signal obtained tying sources together using common sense resistor. voltage this resistor, with suitable scaling, comparator which disable output setting Setting immediately turns power FETs, which turned until first rising edge clock after returned This implements current limit circuit. same sense circuit used implement electronic circuit breaker latching input with external latch. Normal operation will resume until this latch reset. When sense resistors used both transconductance operation current limit obtained using differential amplifier analog current feedback summing amplifier drive comparator. Alternatively differential amplifier output full wave rectified obtain magnitude current signal.
STARTUP CONDITIONS
special startup conditions required. MSA66 transition from shutdown 100% duty cycle under conditions. There approximately 100µs delay after stabilized until operation starts.
CURRENT SENSE
There current limit current sensing circuits MSA66. However, source terminals N-rail power FETs brought separate from power ground, which allows inserting resistors current sensing external circuits.
SUPPLY
internal regulator provides +5V±5%. This regulator supplies about 100mA internal circuits: available external use. Some internal precision circuits well logic this supply; therefore user must take reasonable precaution avoid corrupting supply.
CURRENT SENSE OPTIONS
voltage proportional coil current, including polarity, required; then separate sense resistor should used sense current from each half bridge. These resistors should then connected true differential amplifier produce this voltage. This technique suitable transconductance drive motor.
This data sheet been carefully checked believed reliable, however, responsibility assumed possible inaccuracies omissions. specifiEMAIL prodlit@apexmicrotech.com APEX MICROTECHNOLOGY CORPORATION TELEPHONE (520) 690-8600 (520) 888-3329 ORDERS (520) 690-8601 cations subject change without notice. MSA66U JULY 2003 2003 Apex Microtechnology Corp.

(800) 546-APEX (800) 546-2739 FEATURES 10.8V Supply Vol

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