MP108U
FEATURES
• LOW COST
• HIGH VOLTAGE - 200 VOLTS
• HIGH OUTPUT CURRENT - 10 AMPS
• 100 WATT DISSIPATION CAPABILITY
• 300kHz POWER BANDWIDTH
APPLICATIONS
• INKJET PRINTER HEAD DRIVE
• PIEZO TRANSDUCER DRIVE
• INDUSTRIAL INSTRUMENTATION
• REFLECTOMETERS
• ULTRA-SOUND TRANSDUCER DRIVE
DESCRIPTION
component that provides a cost effective solution in many indus-
trial applications. The MP108 offers outstanding performance
that rivals much more expensive hybrid components yet has a
footprint of only 4 sq in. The MP108 has many optional features
such as four-wire current limit sensing and external compensation.
The 300 kHz power bandwidth and 10 amp output of the MP108
makes it a good choice for piezo transducer drive applications.
The MP108 is built on a thermally conductive but electrically
insulating substrate that can be mounted to a heat sink.
EQUIVALENT CIRCUIT DIAGRAM
PLATE
BACK
GND
GND
+Vb
+Vb
The MP108 operational amplifier is a surface mount constructed
Cc1
Cc2
+IN
-Vb
-Vb
TP
-IN
http://www.cirrus.com
SUBSTRATE
BACKPLATE
34
33
32
30
25
8
4
3
2
1
5
6
C5
R12
C1
R9
C3
Q1A
Q15A
R10
D1
R1
Q12 Q13
MP108, MP108A
R19
Q15B
R11
P r o d u c t I n n o v a t i o n F r o m
P r o d u c t I n n o v a t i o n F r o m
Q23
Q4
Q1B
R2
R15
Power Operational Amplifier
Q24
Q17
Q2
IC1
R8
R7
R20
R3
Q14
Q20
Q8
Q19
Q7
Q18
Q21
Q6
Q9
Q16
Q11
R5
R17
D2
Copyright © Cirrus Logic, Inc. 2009
Q3
Q22
(All Rights Reserved)
14
15
16
11
12
13
28
27
20
21
22
17
18
19
+Vs
+Vs
+Vs
OUT
OUT
OUT
+Ilim
-Ilim
OUT
OUT
OUT
-Vs
-Vs
-Vs
-IN
NOTES:
C
BOTH PINS 3 AND 32 REQUIRED CONNECTED TO SIGNAL GROUND
C2 AND C3 ELECTROLYTIC 10µF PER AMP OUTPUT CURRENT
C1,C4,C5-8 HIGH QUALITY CERAMIC 0.1µF
ALL OUTPUT PINS MUST BE TIED TOGETHER
34
C
IS NPO (COG) RATED FOR FULL SUPPLY VOLTAGE +V
TYPICAL APPLICATION
INKJET NOZZLE DRIVE
it an ideal nozzle driver for industrial inkjet printers. The 10 amp
output capability can drive hundreds of nozzles simultaneously.
EXTERNAL CONNECTIONS
+IN
33
The MP108's fast slew rate and wide power bandwith make
GND
TP
32
1
PRINT
NOZZLE
COMMAND
VOLTAGE
R
BACK
I
NC
C7
PLT
31
2
GND
-V
30
3
B
C5
+V
NC
29
VIEW FROM COMPONENT SIDE
4
-V
B
+V
+I
+V
S
-V
C
28
S
LIM
5
C
1
-V
S
R
S
C
+V
LIM
C
LOAD &
FEEDBACK
-I
B
C
27
LIM
6
C
MP108 • MP108A
B
2
GND
GND
C8
NC
S
NC
26
R
7
TO -V
F
+V
-V
S
25
-I
C
8
MP108 • MP108A
B
B
LIM
C
2
100pF
470pF
220pF
33pF
10pF
33pF
NC
NC
24
C6
9
C
C
APEX − MP108UREVD
C
C
C
C
OUT
C
C
1
10
NC
NC
23
GAIN W/O BOOST
GAIN W BOOST
PACKAGE STYLE FD
PHASE COMPENSATION
OUT
OUT
11
22
+I
TRANSDUCER
10
10
LIM
1
4
1
3
OUT
OUT
12
21
+
OUT
34-PIN DIP
OUT
20
13
C3
C4
R
C1
C2
+
PIEZO
MAY 2009
LIM
TYP. SLEW RATE
TYP. SLEW RATE
+V
-V
14
19
S
S
170 V/µS
135 V/µS
135 V/µS
55 V/µS
12 V/µS
35 V/µS
+V
-V
15
18
S
S
+V
-V
17
16
S
1
S