Instrukcja obsługi Microchip MD1822

Przeczytaj poniżej 📖 instrukcję obsługi w języku polskim dla Microchip MD1822 (16 stron) w kategorii nieskategoryzowany. Ta instrukcja była pomocna dla 23 osób i została oceniona przez 2 użytkowników na średnio 4.5 gwiazdek

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2018 Microchip Technology Inc. DS20005706A-page 1
MD1822
Features
Mixed Inversion MOSFET Driver
6 ns Rise and Fall Time
2A Peak Output Source-and-Sink Current
1.8V to 5V Input CMOS Compatible
5V to 10V Total Supply Voltage
Smart Logic Threshold
Low-Jitter Design
Four Matched Channels
Drives Two P-Channel and Two N-Channel
MOSFETs
Outputs can swing below Ground
Low-Inductance, Quad-Flat No-Lead Package
High-Performance, Thermally Enhanced
Packaging
Applications
Medical Ultrasound Imaging
Piezoelectric Transducer Drivers
Non-Destructive Testing
PIN Diode Driver
CCD Clock Driver/Buffer
High-Speed Level Translator
General Description
The MD1822 is a high-speed, four-channel MOSFET
driver designed to drive high-voltage P-channel and
N-channel MOSFETs for medical ultrasound
applications and other applications requiring a high-
output current for a capacitive load. The high-speed
input stage of the MD1822 can operate from a 1.8V to
5V logic interface with an optimum operating input
signal range of 1.8V to 3.3V. An adaptive threshold
circuit is used to set the level translator switch
threshold to the average of the input logic 0 and
logic 1 levels. The input logic levels may be ground
referenced even though the driver is putting out bipolar
signals. The level translator uses a proprietary circuit,
which provides DC coupling together with high-speed
operation.
The output stage of the MD1822 has separate power
connections, enabling the output signal L and H levels
to be chosen independently from the supply voltages
used for the majority of the circuit. As an example, the
input logic levels may be 0V and 1.8V, the control logic
may be powered by +5V and –5V, and the output L and
H levels may be varied anywhere over the range of –5V
to +5V. The output stage is capable of peak currents of
up to ±2A, depending on the supply voltages used and
load capacitance present. The PE pin serves a dual
purpose. First, its logic H level is used to compute the
threshold voltage level for the channel input level
translators. (See Figure 3-1.) Second, when PE is low,
the outputs are disabled, with the A and C outputs high
and the B and D outputs low. This assists in properly
precharging the AC coupling capacitors that may be
used in series in the gate drive circuit of an external
PMOS and NMOS transistor pair.
Package Type
16-lead QFN
(Top view)
1
See Table 2-1 for pin information.
High-Speed 4-Channel MOSFET Driver with Two Inverting
and Two Non-Inverting Outputs
PE
INA
INB OUTB
VDD VH
INC
IND
OUTC
OUTD
GND VSS VL
MD1822
INB
VDD
OUTC
OUTD
GND
Level
Shifter
VH
PE
INA
VSS VL
OUTB
OUTA
VDD VH
INC
IND
SUB
VSS VL
Level
Shifter
Level
Shifter
Level
Shifter
Level
Shifter
VDD
VH
VSS VL
VDD
VH
VSS VL
MD1822
OUTA
MD1822
DS20005706A-page 2 2018 Microchip Technology Inc.
Functional Block Diagrams
2018 Microchip Technology Inc. DS20005706A-page 3
MD1822
Typical Application Circuit
3.3V CMOS
Logic Inputs
OUTA
OUTB
OUTC
OUTD
+10V
0.1µF
VDD VH
+10V
VSS VL
GND
INA
INB
INC
IND
PE
MD1822
PIN
10nF
10nF
+100V
HVOUT
-100V
+3.3V
NIN
DMP
0.47µF
TC6320
0.47µF
0.47µF
TC6320
10nF
10nF

Specyfikacje produktu

Marka: Microchip
Kategoria: nieskategoryzowany
Model: MD1822

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