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PDF MP18021A Data sheet ( Hoja de datos )
| Número de pieza | MP18021A | |
| Descripción | 100V High Frequency Half-Bridge Gate Driver | |
| Fabricantes | MPS | |
| Logotipo |  |
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The Future of Analog IC Technology
DESCRIPTION
The MP18021A 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
MP18021A
100V, 2.5A, High Frequency
Half-Bridge Gate Driver
FEATURES
• Drives N-Channel MOSFET Half Bridge
• 100V 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 SOIC8E and QFN8 (3×3mm) Packages
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
INL
VDD
DRIVE
HI
DRIVE
LO
MP18021A
VSS
BST
DRVH
SW
DRVL
SECONDARY
SIDE
CIRCUIT
ISOLATION
AND
FEEDBACK
MP18021A Rev. 1.52
www.MonolithicPower.com
11/21/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
1
1 page  
MP18021A―100V, 2.5A, HIGH FREQUENCY HALF-BRIDGE GATE DRIVER
PIN FUNCTIONS
Pin # Name Description
1
VDD
Supply input. This pin supplies power to all the internal circuitry. A decoupling capacitor to
ground must be placed close to this pin to ensure stable and clean supply.
2
BST
Bootstrap. This is the positive power supply for the internal floating high-side MOSFET driver.
Connect a bypass capacitor between this pin and SW pin.
3 DRVH Floating driver output.
4 SW Switching node.
5 INH Control signal input for the floating driver.
6 INL Control signal input for the low side driver.
VSS,
7 Exposed Chip ground. Connect exposed pad to VSS for proper thermal operation.
Pad
8 DRVL Low side driver output.
MP18021A Rev. 1.52
www.MonolithicPower.com
11/21/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
5
5 Page 
MP18021A―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, along with capacitor Creset, is used to
reset the power transformer in a lossless manner.
This topology lends itself well to run at duty
cycles exceeding 50%. For these reasons, the
input voltage may not be able to run at 100V for
this application.
Input Voltage
INH
5 INH
SW 4
INL
6 INL
DRVH 3
7 VSS
BST 2
8 DRVL
VDD 1
DRVL
VDD
9V - 18V
DRVL
Creset
Figure 5 – Active-Clamp Forward Converter
Secondary
Circuit
MP18021A Rev. 1.52
www.MonolithicPower.com
11/21/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet MP18021A.PDF ] | |
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