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CHL8505CRT Datasheet(PDF) 5 Page - International Rectifier

Part # CHL8505CRT
Description  High.Efficiency 5V MOSFET Gate Driver
Download  15 Pages
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Manufacturer  IRF [International Rectifier]
Direct Link  http://www.irf.com
Logo IRF - International Rectifier

CHL8505CRT Datasheet(HTML) 5 Page - International Rectifier

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High‐Efficiency 5V MOSFET Gate Driver 
CHL8505 
December 6, 2011  |  FINAL |  V1.05
5
PIN DESCRIPTIONS 
PIN#
PIN NAME
PIN DESCRIPTION
PWM 
The PWM signal is the control input for the driver from a 1.8V IR ATL‐based PWM signal. Connect this pin 
 to the PWM output of the controller. 
VCC 
Connect this pin to a +5V bias supply. Place a high quality low ESR ceramic capacitor from this pin to GND. 
VDRV 
Connect this pin to a separate supply voltage between 4.0V and 13.2V to vary the drive voltage on the  
low‐side MOSFETs. Place a high quality low ESR ceramic capacitor from this pin to GND. 
NC 
Leave this pin floating. 
BOOT 
Floating bootstrap supply pin for the upper gate drive. Connect the bootstrap capacitor between this pin and  
the SWITCH pin. The bootstrap capacitor provides the charge to turn on the upper MOSFET. See the Internal 
Bootstrap Device section under DESCRIPTION for guidance in choosing the capacitor value. 
HI_GATE 
Upper gate drive output. Connect to gate of high‐side power N‐Channel MOSFET. 
SWITCH 
Connect this pin to the SOURCE of the upper MOSFET and the DRAIN of the lower MOSFET.  
This pin provides a return path for the upper gate drive 
LO_GATE 
Lower gate drive output. Connect to gate of the low‐side power N‐Channel MOSFET. 
NC 
Leave this pin floating. 
10 
NC 
Leave this pin floating. 
PAD (11) 
GND 
Bias and reference ground. All signals are referenced to this node. It is also the power ground return  
of the driver. 


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