Microchip MD1822DB1 Handleiding

Microchip Niet gecategoriseerd MD1822DB1

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Supertex inc.
Supertex inc.
www.supertex.com
MD1822DB1
Doc.# DSDB-MD1822DB1
A032913
MD1822 + TC7920: Three Level
High Speed ±100V 2.0A Pulser Demoboard
Demoboard Features
â–ºUltrasound high voltage & high current RTZ pulser
â–ºMD1822 driving TC7920 with two pairs of MOSFETs
â–º3-level voltage pulse waveform outputs
►±2.0A source and sink current capability
â–º40 MHz frequency clock on board
â–ºProgrammable logic waveform generation
â–ºJTAG connection for CPLD programming
â–ºConnectors for external clock and signals
â–º3.3V CMOS logic interface
Applications
â–ºMedical ultrasound imaging
â–ºPiezoelectric transducer drivers
►Material aw detection
â–ºATE and waveform generator
â–ºTransducer power driver
â–ºCapacitive and MEMS sensor driver
â–ºUltrasonic NDT detection and sonar ranger
General Description
The MD1822DB1 is a demoboard for the three level ±100V
2.5A pulser chip-set of the MD1822 MOSFET driver and the
TC7920 MOSFET. The demoboard consists of one MD1822
in the 3x3mm 16-lead QFN package driving the TC7920
which has two pairs of high speed and high voltage compli-
mentary P- and N-MOSFETs in in one 4x4mm, 8-lead DFN
package. This circuit is an ideal, cost-optimized, high voltage
and high current RTZ ultrasound transmit pulser.
The CPLD-programmable logic circuit (40 MHz crystal os-
cillator) generates accurately timed high-speed waveforms
on a separate CPL board. Multiple frequency and waveform
combinations can be selected as bipolar pulse waveforms.
An external clock input can be used if the on-board oscil-
lator is disabled. The external trigger input can be used to
synchronize the output waveforms. There are îš¿ve push
buttons for selecting demonstration waveform, frequency,
phase, and mode functions. Color LEDs indicate the demo
selection states. Jumpers on the board can select either the
330pF/2.5k on-board load, or user test loads.
Block Diagram
Waveform
Generator
CPLD
+3.3V
OSC
6
JTAG
EXCLK
EXT
CLKIN
5
WAVE
FREQ
SEL
CLMP
ENAB
LED1
LED2
PWR
ENA
MOD
RL
2.5k
CL
330pF
XDCR
TC7920
-100V
VNN
+100V
VPP
X1
VSS/VL
MD1822
+12V
VDD/VH
40MHz
EXTRG
EN
PE
INA
INB
INC
IND
2
MD1822DB1
Supertex inc.
www.supertex.com
Doc.# DSDB-MD1822DB1
A032913
Operating Supply Voltages and Current (on J10)
Symbol Parameter Min Max Units Suggested Current Limit *Typ
VCC Logic supply 1.8 3.3 3.3 V 150mA
GND Circuit ground or 0V - 0 - V ---
VDD MD1822 positive supply 5.0 10 11.5 V 10mA
VPP TC7920 HV positive supply 0 - 100 V 5.0mA
VNN TC7920 HV negative supply -100 - 0 V 5.0mA
Note:
* Current limits should be changed according the testing waveform, frequency and duty cycles.
MD1822DB1 Board and PCB Layout
Push Button Operation Functions
Button Symbol Description
WAVE Demo waveforms selection
FREQ Demo waveform frequency selection
SEL Not Used
ENA MD1822 PE pin control
PHASE Not Used
Actual size = 100mm x 70mm
3
MD1822DB1
Supertex inc.
www.supertex.com
Doc.# DSDB-MD1822DB1
A032913
VCC
VCC
VCC
VCC
VDD
VNN
VPP
VSS
1 2
TP13
J5
CH1
1
2
12
1
9
2
10
11
P
N
SW5
C4
0.1
YLW
N E
1
D N G
2 T U O 3
C C V
4
40MHzX1
PE
15
VSS
17
GND
6
IND
5
VSS
3
9
OUTD
VH1
10
8
OUTC
VDD
2
INC
4
VL1
7
INA
16
INB
1
12
OUTA
13
OUTB
VL2
14
VH2
11
U1
MD1822
TP14 1 2
1
2 3
4
5
6
D9
MMBD3004BRM
1 2
R4
1k
C2
1µF
100V
1 2 3 4 5 6
R31
0
1
2
3
4
3
6
5
7
8
P
N
U3
R38 50
3 6 1
2
3
J9
C18
330p
250V
Optional
1 2
TP7
C16
0.1
TP17
4 5
C12D
10nF
C6
0.1
1 8
1 2
WAV
2
FRE
3
GND
4
SEL
5
ENABLE
6
TDI
9 TMS
10
TCK
11
VCC 15
GND
17
D N I 18
A N I 19
B N I
20
E P 21
C N I
22
TDO
24
GND
25
VCC 26
ENA 28
PWR 29
LED3 30
LED2 31
LED1 32
VCC
35
G R T X E
39
1 H C
40
43
TESTA
36
37
38
PHASE
7
N.C.
12
N.C.
13
U2
XC9572XZ - VQ44
2 7
TP12
C11
1.0
12
1 2
TP2
R11
2.49k
1W
C31
0.1
YLW YLW RED GRN
R5
1k
R6
1k
R7
1k
R3
1k
D1 D2 D3 D4 D5
R32
50
J3
EXCLK
R13
1k
J7
EXTRG
J2
EX=Low
TP10
TP16
TXOUT
TP1
TP6
TP9
TP8
TESTB
TESTC
CLK
C7
0.1
C8
0.1
C9
0.1
C5
0.1
1 2 1 2
R39 50
R41 50
R42 50
R16
200
R17
200
TP15
TP3 TP4
R10
200
R8
200
R9
200
C10
0.1
C12C
10nF
C12B
10nF
C12A
10nF
R18
0
R25
0
R14
5.0
R33
0C3
1µF
100V
U4
R34
0
VCC
VDD VNN
D6B
J10
Header 5
TP22 TP20 TP21
TP24 D7
B1100-13
D6A
VPP
D8
B1100-13
J8
JTAG
R15
50
R19
50
R30
200
R24
33k
SW4
C30
0.1
R29
200
R23
33k
SW3
C29
0.1
R28
200
R22
33k
SW2
C28
0.1
R27
200
R21
33k
SW1
C27
0.1
R26
200
R20
33k
C21
0
TP21
1
2
3
1
2
3
1 2 3 4 5
1
6
3
4
1
2 1
2
TC7920
TC7920
Schematic Diagram

Product specificaties

Merk: Microchip
Categorie: Niet gecategoriseerd
Model: MD1822DB1

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