MP106 Power Amplifier FEATURES Optimized Solution to Drive Dynamic Capacitive Loads Drive Capability 0-540nF Short Term Output current >30A (within SOA) High Internal Power Dissipation of 130W Fixed Gain -15V/V or -20V/V Optimized for Achieving a -36V Output Voltage Swing Slew Rate of 50 V/s APPLICATIONS Piezoelectric Actuation for Inkjet Printers DESCRIPTION The MP106 is a high output power amplifier for driving capacitive loads such as piezo devices used in ink- jet printing applications. The MP106 utilizes Apex proprietary technology with discrete semiconductor and passive elements on a thermally highly conductive, but electrically isolated package, delivering high power in a very compact module. The amplifier gain is fixed at -15V/V or -20V/V. It is optimized to achieve a -36V output voltage swing even at a small output voltage offset with a single 3V DAC. A combination of internal and external compensa- tion provides optimum slew rate and insures stability while reducing the overall number of required compo- nents. Auxiliary voltages (+V and -V ) for the amplifier stage are used to reduce the power loss in the output B B drivers. Figure 1: Typical Connection +VB CC RC CBP4 CBP3 7 Print Nozzle 5 Command -IN Voltage 4,8 15-18 OUT MP106 1 23-26 +IN 33, 38, 39 D1 CBP5 VTMP CBP2 CBP1 CBP6 -VS -VB Apex Microtechnology Inc. Apr 2018 www.apexanalog.com All rights reserved MP106U Rev B1223 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 190 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 MP106 PINOUT AND DESCRIPTION TABLE The package of MP106 is designed to be mounted above the print head if desired. Therefore, the width of the amplifier is less than the width of the Samba print head. Please check the positioning of the connectors and the location of the components carefully to avoid any damage during mounting or any short to ground. All pins except those marked TP, N/C, TEMP or GAIN must be connected externally for proper operation. The diodes between +V /+V and -V /-V are recommended to prevent damage of the amplifier during power S B B S sequencing. Figure 2: External Connections -IN +IN GND TP -VB BPLT CBP1 CBP2 -VB GND N/C +VB N/C CC RC N/C CC N/C GND -VB +VB CBP3 CBP4 N/C GAIN D1 N/C N/C OUT OUT OUT OUT OUT OUT OUT OUT -VS D2 +VS CBP5 CBP6 -VS +VS -VS +VS -VS +VS TEMP GND N/C TEMP N/C Riso CN RN 2 MP106U Rev B