MD7120 Supertex, Inc., MD7120 Datasheet
MD7120
Manufacturer Part Number
MD7120
Description
Manufacturer
Supertex, Inc.
Datasheet
1.MD7120.pdf
(6 pages)
Features
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Applications
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Typical Application Circuit
HVCMOS
All N-MOSFET full-bridge driver
Designed for 200V bridge supply voltage
Up to 1.0MHz operation frequency
Greater than 90% efficiency
Designed for low total harmonic distortion
Single voltage drive power supply +12V
Smart logic voltage threshold
Resistor programmable OCP threshold
UVP function built-in
Accurate and adjustable dead time
32-Lead QFN package
Class-D audio amplifier
High frequency PWM motor control
High frequency switching power supply
Ultrasound transducer drivers
High voltage waveform generator
+1.8 or 5.0V
®
High Speed, 200V, Full H-Bridge MOSFET Driver
Logic
technology for high performance
GND
EN
INA
INB
OPF
AV
DD
Logic
V
SS
UVP
OTP
OCP
V
DD1
R3
RDT
Translator
Translator
Translator
Translator
Monitor
Level
Level
Level
+12V
CTV
Level
General Description
The Supertex MD7120 is a high voltage, high speed, full-bridge driver.
It is ideal for Class-D audio amplifier applications and other high
frequency PWM driver applications, such as motor driving. This high-
voltage and high-speed driver can also be used for other applications:
as a piezo-electric transducer driver; as a MOSFET driver in a switched
mode power supply; or as a two channel driver for half-bridge power
stages.
The new IC topology is designed to drive dual N-MOSFETs as power
switches for both the high side and low side. It consists of controller
logic circuits, level translators, and a bootstrap floating powered gate
driver and over current protection circuits without using current sensing
resistors. The thresholds of the OCP for the high and low side are
resistor-programmable.
The power MOSFET top drain can be connected to up to +200V
while the bottom N-channel MOSFET source is grounded. They are
designed to provide 3.0A peak driving current with well-matched output
impendence and propagation delay on the high and low sides, as well
as from device-to-device.
The EN pin serves a dual purpose: the logic high level is used to
compute the threshold voltage level of inputs; and the logic low level
disables the outputs. The IC is in a low inductance and thermally
enhanced package.
RP2
R2
V
DD2
V
REF
RP1
1
MD7120
R1
Driver
Driver
Driver
Driver
D1, D3
S1 - 4
GS1 - 4
V
V
DD
DD
D1
GS3
GS4
GS1
GS2
BS1
RP3
BS3
D3
G3
G4
G1
G2
S1
S2
S3
S4
R6
R4
R5
R7
+12V
C1
D2
D1
C2
R8
+200V
+200V
M2
M4
M1
M3
D3
D4
D5
D6
L1
L2
C3
C4
MD7120
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