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PDF MPQ18021A Data sheet ( Hoja de datos )
| Número de pieza | MPQ18021A | |
| Descripción | High Frequency Half-Bridge Gate Driver | |
| Fabricantes | MPS | |
| Logotipo |  |
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The Future of Analog IC Technology
DESCRIPTION
The MPQ18021A is a high-frequency, 100V, half-
bridge, N-channel power MOSFET driver. Its low-
side and high-side driver channels are
independently controlled and matched with a time
delay of less than 5ns. Under-voltage lockout on
both high-side and low-side supplies force their
outputs low in case of insufficient supply. The
integrated bootstrap diode reduces external
component count.
TYPICAL APPLICATION
+12V
MPQ18021A
100V, 2.5A, High-Frequency
Half-Bridge Gate Driver
FEATURES
• Drives N-Channel MOSFET Half Bridge
• 115V VBST Voltage Range
• On-Chip Bootstrap Diode
• Typical 16ns Propagation Delay Time
• Less Than 5ns Gate Drive Matching
• Drives 1nf Load with 12ns/9ns Rise/Fall
Times with 12V VDD
• TTL Compatible Input
• Less Than 150μA Quiescent Current
• UVLO for Both High-Side and Low-Side
• In SOIC8 Package
APPLICATIONS
• Telecom Half-Bridge Power Supplies
• Avionics DC-DC Converters
• Two-Switch Forward Converters
• Active Clamp Forward Converters
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Products, Quality Assurance page.
“MPS” and “The Future of Analog IC Technology” are registered trademarks of
Monolithic Power Systems, Inc.
100V
PWM
CONTROLLER
INH/HI
INL/LI
VDD
BST/HB
DRIVE
HI
DRIVE
LO
MPQ18021A
VSS
DRVH/HO
SW/HS
DRVL/LO
SECONDARY
SIDE
CIRCUIT
ISOLATION
AND
FEEDBACK
MPQ18021A Rev. 1.0
www.MonolithicPower.com
12/10/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
1
1 page  
MPQ18021A―100V, 2.5A, HIGH-FREQUENCY HALF-BRIDGE GATE DRIVER
PIN FUNCTIONS
Pin #
1
2
3
4
5
6
7
8
Name Description
VDD
Supply input. Supplies power to all the internal circuitry. Requires a decoupling capacitor to
ground placed close to this pin to ensure stable and clean supply.
BST/HB
Bootstrap. Positive power supply for the internal floating high-side MOSFET driver. Connect
a bypass capacitor between this pin and SW pin.
DRVH/HO Floating driver output.
SW/HS Switching node.
INH/HI Control signal input for the floating driver.
INL/LI Control signal input for the low side driver.
VSS Chip ground.
DRVL/LO Low side driver output.
MPQ18021A Rev. 1.0
www.MonolithicPower.com
12/10/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
5
5 Page 
MPQ18021A―100V, 2.5A, HIGH-FREQUENCY HALF-BRIDGE GATE DRIVER
Active-Clamp Forward Converter
In active-clamp forward converter topology, the
MOSFETs are driven alternately. The high-side
MOSFET and the capacitor Creset, losslessly reset
the power transformer.
This topology lends itself well to run at duty
cycles exceeding 50%. Therefore, the input
voltage for this application may not be able to go
to 100V.
Input Voltage
INH
5 INH
SW 4
INL
6 INL
DRVH 3
7 VSS
BST 2
8 DRVL
VDD 1
DRVL
Creset
DRVL
VDD
9V - 18V
Figure 6: Active-Clamp Forward Converter
Secondary
Circuit
MPQ18021A Rev. 1.0
www.MonolithicPower.com
12/10/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet MPQ18021A.PDF ] | |
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