APEX MP39A

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FEATURES
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HIGH INTERNAL DISSIPATION — 125 Watts
HIGH VOLTAGE, HIGH CURRENT — 100V, 10A
HIGH SLEW RATE — 10V/µs
4 WIRE CURRENT LIMIT SENSING
OPTIONAL BOOST VOLTAGE INPUTS
APPLICATIONS
LINEAR AND ROTARY MOTOR DRIVES
YOKE/MAGNETIC FIELD EXCITATION
PROGRAMMABLE POWER SUPPLIES TO ±45V
INDUSTRIAL AUDIO
PACKAGE OPTION - DIP10 - DUAL-IN-LINE
30-pin DIP
PACKAGE STYLE CL
TYPICAL APPLICATION REF: APPLICATION NOTE 25
The high power bandwidth and high voltage output of the
MP39 allows driving ultra-sonic transducers via a resonant
circuit including the transducer and a matching transformer.
The load circuit appears resistive to the MP39.
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EXTERNAL CONNECTIONS
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EQUIVALENT SCHEMATIC
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The MP39 is a cost-effective high voltage MOSFET power
operational amplifier constructed with surface mount components on a thermally conductive but electrically isolated
substrate.
While the cost is low the MP39 offers many of the same
features and performance specifications found in much more
expensive hybrid power amplifiers.
The metal substrate allows the MP39 to dissipate power
up to 125 watts and its power supply voltages can range up
to +/- 50 Volts (100V total). Optional boost voltage inputs
allow the small signal portion of the amplifier to operate at
higher supply voltages than the high current output stage.
The amplifier is then biased to achieve close linear swings
to the supply rails at high current for extra efficient operation.
External compensation tailors performance to the user needs.
A four-wire sense technique allows current limiting without
the need to consider internal or external mili-ohm parasitic
resistance in the output line. An Iq pin is available which can
be used to shut off the quiescent current in the output stage.
The output stage then operates class C and lowers quiescent
power dissipation. This is useful in applications where output
crossover distortion is not important.
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DESCRIPTION
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* SEE "BYPASSING" PARAGRAPH
Phase Compensation
Gain
Cc
Rc
1
470pF
100Ω
≥3
220pF
Short
≥ 10
100pF
Short
APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
1
MP39 • MP39A
ABSOLUTE MAXIMUM RATINGS
SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
SUPPLY VOLTAGE, +VS to –VS
BOOST VOLTAGE
OUTPUT CURRENT, within SOA
POWER DISSIPATION, internal
INPUT VOLTAGE, differential
INPUT VOLTAGE, common mode
TEMPERATURE, pin solder - 10s
TEMPERATURE, junction2
TEMPERATURE, storage
OPERATING TEMPERATURE RANGE, case
100V
±VS ±20V
25A
125W
±20V
±VB
200°C
175°C
–40 to +105°C
–40 to +85°C
SPECIFICATIONS
NOTES:
*
1.
2.
3.
4.
CAUTION
Full temperature range
Full temperature range
Full temp, range, VCM= ±20V
100kHz BW, RS = 1KΩ
Full temperature range, CC = 100pF
IO=10A
RL=10Ω, VO = 90V p-p
CC = 100pF
Full temperature range
IO=10A
±VB = ±VS ±10V, IO=10A
AV=+1,10V step, RL =4Ω
AV= –10, CC= 100pF
Full temperature range, AV=+1
Full temperature range
Full temperature range, F>60Hz
Full temperature range, F<60Hz
Full temperature range
Meets full range specification
±VB 15
86
94
MP39
TYP
5
30
15
30
10
.01
10
1010
20
±VB 12
98
10
MAX
MIN
10
50
200
50
*
*
113
2
40
*
60
±VS 8.8 ±VS 6.0
±VS 6.8 ±VS 1.1
2.5
10
10
4
±
±
PHASE MARGIN
OUTPUT
VOLTAGE SWING
VOLTAGE SWING
SETTLING TIME to .1%
SLEW RATE
CAPACITIVE LOAD
RESISTANCE
CURRENT, CONTINUOUS
POWER SUPPLY
VOLTAGE
CURRENT, quiescent, boost supply
CURRENT, quiescent, total
THERMAL
RESISTANCE, AC, junction to case3
RESISTANCE, DC, junction to case
RESISTANCE4, junction to air
TEMPERATURE RANGE, case
Full temperature range
±
INPUT
OFFSET VOLTAGE, initial
OFFSET VOLTAGE, vs. temperature
OFFSET VOLTAGE, vs. supply
OFFSET VOLTAGE, vs. power
BIAS CURRENT, initial
BIAS CURRENT, vs. supply
OFFSET CURRENT, initial
INPUT IMPEDANCE, DC
INPUT CAPACITANCE
COMMON MODE VOLTAGE RANGE
COMMON MODE REJECTION, DC
INPUT NOISE
GAIN
OPEN LOOP, @15Hz
GAIN BANDWIDTH PRODUCT
POWER BANDWIDTH
MIN
±15
-40
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*
±
±
TEST CONDITIONS 1
±
PARAMETER
±40
12
*
*
10
±50
22
26
*
.9
1.2
85
*
MP39A
TYP
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MAX
UNITS
3
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mV
µV/°C
µV/V
µV/W
pA
pA/V
pA
Ω
pF
V
dB
µVrms
100
30
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*
db
MHz
kHz
*
°
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*
*
11
V
V
µs
V/µs
nF
Ω
A
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*
V
mA
mA
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°C/W
°C/W
°C/W
°C
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The specification of MP39A is identical to the specification for MP39 in applicable column to the left.
Unless otherwise noted: TC = 25°C, RC = 100Ω, CC = 470pF. DC input specifications are ± value given. Power supply voltage is
typical rating. ±VB = ±VS.
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.
Rating applies if the output current alternates between both output transistors at a rate faster than 60 Hz.
The MP39 must be used with a heat sink or the quiescent power may drive the unit to junction temperatures higher than 175°C.
The MP39 is constructed from MOSFET transistors. ESD handling procedures must be observed.
APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
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TYPICAL PERFORMANCE
GRAPHS
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MP39 • MP39A
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APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
3
MP39 • MP39A
ABSOLUTE MAXIMUM RATINGS
SPECIFICATIONS
GENERAL
BYPASSING
Please read Application Note 1 "General Operating Considerations" which covers stability, supplies, heat sinking,
mounting, current limit, SOA interpretation, and specification
interpretation. Visit www.apexmicrotech.com for design tools
that help automate tasks such as calculations for stability,
internal power dissipation, current limit; heat sink selection;
Apex’s complete Application Notes library; Technical Seminar
Workbook; and Evaluation Kits.
Proper bypassing of the power supply pins is crucial for proper
operation. Bypass the ±Vs pins with a aluminum electrolytic
capacitor with a value of at least 10µF per amp of expected
output current. In addition a .47µF to 1µF ceramic capacitor
should be placed in parallel with each aluminum electrolytic
capacitor. Both of these capacitors have to be placed as close
to the power supply pins as physically possible. If not connected
to the Vs pins (See BOOST OPERATION) the VB pins should
also be bypassed with a .47µF to 1µF ceramic capacitor.
CURRENT LIMIT
The two current limit sense lines are to be connected directly
across the current limit sense resistor. For the current limit
to work correctly pin 24 must be connected to the amplifier
output side and pin 23 connected to the load side of the current
limit resistor, RCL, as shown in Figure 1. This connection will
bypass any parasitic resistances, Rp, formed by sockets and
solder joints as well as internal amplifier losses. The current
limiting resistor may not be placed anywhere in the output
circuit except where shown in Figure 1.
The value of the current limit resistor can be calculated as
follows:
.7
RCL =
I LIMIT
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USING THE IQ PIN FUNCTION
Pin 25 (Iq) can be tied to pin 6 (Cc1) to eliminate the class
AB biasing current from the output stage. Typically this would
remove 1-4 mA of quiescent current. The resulting decrease
in quiescent power dissipation may be important in some
applications. Note that implementing this option will raise the
output impedance of the amplifier and increase crossover
distortion as well.
COMPENSATION
The external compensation components CC and RC are connected to pins 4 and 6. Unity gain stability can be achieved at
any compensation capacitance greater than 470 pF with at
least 60 degrees of phase margin. At higher gains more phase
shift can be tolerated in most designs and the compensation
capacitance can accordingly be reduced, resulting in higher
bandwidth and slew rate.
APPLICATION REFERENCES
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For additional technical information please refer to the following application notes.
AN 1
General Operating Considerations
AN 11
Thermal Techniques
AN 38
Loop Stability with Reactive Loads
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BOOST OPERATION
With the VB feature the small signal stages of the amplifier
are operated at higher supply voltages than the amplifier's high
current output stage. +VS (pins 12-14) and –VS (pins 18-20)
are connected to the high current output stage. An additional
10V on the VB pins is sufficient to allow the small signal stages
to drive the output transistors into saturation and improve the
output voltage swing for extra efficient operation when required.
When close swing to the supply rails is not required the +VB
and +VS pins must be strapped together as well as the –VB
and –VS pins. The boost voltage pins must not be at a voltage
lower than the VS pins.
This data
sheet has been carefully
checked and is believed
to be reliable,
however,
no responsibility
is assumed
for possible• inaccuracies
or omissions.
All specifications
subject to change without notice.
APEX
MICROTECHNOLOGY
CORPORATION
• TELEPHONE
(520)
690-8600
• FAX (520)
888-3329
ORDERS (520)
690-8601
• EMAILare
prodlit@apexmicrotech.com
4
MP39U REV G JANUARY 2005 © 2005 Apex Microtechnology Corp.