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TPS28226DG4 データシート(PDF) 3 Page - Texas Instruments

部品番号 TPS28226DG4
部品情報  TPS28226 High-Frequency 4-A Sink Synchronous MOSFET Drivers
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メーカー  TI1 [Texas Instruments]
ホームページ  http://www.ti.com
Logo TI1 - Texas Instruments

TPS28226DG4 データシート(HTML) 3 Page - Texas Instruments

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background image
5
3
7
6
8
1
2
BOOT
PWM
VDD
EN/PG
GND
PHASE
4
Exposed
Thermal
Die Pad
LGATE
UGATE
1
2
3
4
8
7
6
5
UGATE
BOOT
PWM
GND
PHASE
EN/PG
VDD
LGATE
TPS28226
www.ti.com
SLUS791A – JULY 2007 – REVISED SEPTEMBER 2015
5 Pin Configuration and Functions
D Package
8-Pin SOIC
Top View
DRB Package
8-Pin VSON
Top View
Pin Functions
PIN
NO.
I/O
DESCRIPTION
NAME
SOIC
VSON
Floating bootstrap supply pin for the upper gate drive. Connect the bootstrap
BOOT
2
2
I/O
capacitor between this pin and the Phase pin. The bootstrap capacitor
provides the charge to turn on the upper MOSFET.
Enable/power good input/output pin with 1-M
Ω impedance. Connect this pin
to High to enable and Low to disable the device. When disabled, the device
EN/PG
7
7
I/O
draws less than 350-
μA bias current. If the VDD is below UVLO threshold or
over temperature shutdown occurs, this pin is internally pulled low.
GND
4
4
Ground pin. All signals are referenced to this node.
Lower gate drive sink and source output. Connect to the gate of the low-side
LGATE
5
5
O
power N-Channel MOSFET.
Connect this pin to the source of the upper MOSFET and the drain of the
PHASE
8
8
I
lower MOSFET. This pin provides a return path for the upper gate driver.
The PWM signal is the control input for the driver. The PWM signal can enter
three distinct states during operation, see the 3-state PWM Input section
PWM
3
3
I
under DETAILED DESCRIPTION for further details. Connect this pin to the
PWM output of the controller.
Exposed die
Thermal pad
Connect directly to the GND for better thermal performance and EMI.
pad
Upper gate drive sink/source output. Connect to gate of high-side power N-
UGATE
1
1
O
Channel MOSFET.
Connect this pin to a 5-V bias supply. Place a high quality bypass capacitor
VDD
6
6
I
from this pin to GND.
Copyright © 2007–2015, Texas Instruments Incorporated
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