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RT9624G の電気的特性と機能

RT9624GのメーカーはRichtekです、この部品の機能は「Single Phase Synchronous Rectified Buck MOSFET Driver」です。


製品の詳細 ( Datasheet PDF )

部品番号 RT9624G
部品説明 Single Phase Synchronous Rectified Buck MOSFET Driver
メーカ Richtek
ロゴ Richtek ロゴ 




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RT9624G Datasheet, RT9624G PDF,ピン配置, 機能
®
RT9624G
Single Phase Synchronous Rectified Buck MOSFET Driver
General Description
The RT9624G is a high frequency, synchronous rectified,
single phase MOSFET driver designed for normal MOSFET
driving applications and high performance CPU VR driving
capabilities.
The RT9624G can be supplied from 4.5V to 13.2V. The
applicable power stage VIN range is from 5V to 24V. The
RT9624G also builds in an internal power switch to replace
external bootstrap diode.
The RT9624G can support switching frequency efficiently
up to 500kHz. The RT9624G has both UGATE and LGATE
driving circuits for synchronous rectified DC/DC converter
applications. The shoot through protection mechanism is
designed to prevent shoot through between high-side and
low-side power MOSFETs. The RT9624G has tri-state
PWM input with shutdown and EN input shutdown
functions, which can force driver to output low UGATE
and LGATE signals.
The RT9624G is available in a small footprint WDFN-8SL
2x2 package.
Features
Drive Two N-MOSFETs
Shoot-Through Protection
Embedded Bootstrap Switch
Support High Switching Frequency
Fast Output Rising Time
Tri-State PWM Input for Output Shutdown
Enable Control
Small 8-Lead WDFN Package
RoHS Compliant and Halogen Free
Applications
Core Voltage Supplies for Desktop, Motherboard CPU
High Frequency Low Profile DC/DC Converters
High Current Low Voltage DC/DC Converters
Core Voltage Supplies for GFX Card
Marking Information
2A : Product Code
2AW
W : Date Code
Simplified Application Circuit
R1
12V
RT9624G
VCC
BOOT
R2
C1
Enable
EN
UGATE
PHASE
CBOOT
R3
PWM
Controller
PWM LGATE
GND
R4
C5 C6
VIN
Q1
L1
VOUT
R5
Q2
C2
C3 C4
Copyright ©2014 Richtek Technology Corporation. All rights reserved.
DS9624G-01 April 2014
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1

1 Page





RT9624G pdf, ピン配列
Function Block Diagram
EN VCC
RT9624G
Internal
VDD
Enable
Detect
POR
PWM
Tri-State
Detect
Bootstrap
Control
Shoot-Through
Protection
Turn-Off
Detection
Shoot-Through
Protection
VCC
BOOT
UGATE
PHASE
LGATE
GND
Operation
POR (Power On Reset)
The POR block detects the voltage at the VCC pin. When
the VCC pin voltage is higher than POR rising threshold,
the POR block output is high. The POR output is low
when VCC is less than POR rising threshold. When the
POR block output is high, UGATE and LGATE can be
controlled by PWM input voltage. If the POR block output
is low, both UGATE and LGATE will be pulled to low.
Enable Detect
When EN pin input voltage is higher than EN rising
threshold, MOSFET driver is enabled. When the EN input
and POR output are high, UGATE and LGATE can be
controlled by PWM input voltage. When EN input is low,
both UGATE and LGATE are pulled to low.
Tri-State Detect
When both POR block output and EN pin voltages are
high, UGATE and LGATE can be controlled by PWM input.
There are three PWM input modes, which are high, low,
and shutdown state. If PWM input is within the shutdown
window, both UGATE and LGATE output are low. When
PWM input is higher than its rising threshold, UGATE is
high and LGATE is low. When PWM input is lower than
its falling threshold, UGATE is low and LGATE is high.
Copyright ©2014 Richtek Technology Corporation. All rights reserved.
DS9624G-01 April 2014
Bootstrap Control
The bootstrap control block controls the integrated
bootstrap switch. When LGATE is high (low-side MOSFET
is turned on), the bootstrap switch is turned on to charge
the bootstrap capacitor connected to BOOT pin. When
LGATE is low (low-side MOSFET is turned off), the
bootstrap switch is turned off to disconnect VCC pin and
BOOT pin.
Turn-Off Detection
The turn-off detection block detects whether high-side
MOSFET is turned off by monitoring the PHASE pin
voltage. To avoid shoot-through between high-side and low-
side MOSFETs, low-side MOSFET can be turned on only
after high-side MOSFET is effectively turned off.
Shoot-Through Protection
The shoot-through protection block implements the dead
time when both high-side and low-side MOSFETs are
turned off. With shoot-through protection block, high-side
and low-side MOSFET are never turned on simultaneously.
Thus, shoot-through between high-side and low-side
MOSFETs is prevented.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
3


3Pages


RT9624G 電子部品, 半導体
RT9624G
Typical Application Circuit
R1
RT9624G
R2
2.2
12V
4 VCC
BOOT 1 1
CBOOT
1µF
C1
1µF
R3
8 2.2
UGATE
Enable 3 EN
PHASE 7
PWM
Controller
2 PWM
LGATE 5
GND
R4
0
6, 9 (Exposed Pad)
C5
1000µF
x3
Q1 L1
1µH
R5
2.2
Q2
C2
3.3nF
C6
10µF
x4
VIN
12V
C3
2200µF
x2
VOUT
C4
10µF
x2
Timing Diagram
PWM
LGATE
tLGATEpdl
90%
1.5V
UGATE
1.5V
tUGATEpdh
tUGATEpdl
1.5V
90%
1.5V
tLGATEpdh
Copyright ©2014 Richtek Technology Corporation. All rights reserved.
www.richtek.com
6
is a registered trademark of Richtek Technology Corporation.
DS9624G-01 April 2014

6 Page



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共有リンク

Link :


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