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UC3846N Datasheet(PDF) 16 Page - Texas Instruments

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Part No. UC3846N
Description  Current Mode PWM Controller
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Maker  TI1 [Texas Instruments]
Homepage  http://www.ti.com
Logo TI1 - Texas Instruments

UC3846N Datasheet(HTML) 16 Page - Texas Instruments

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Vin
C/S SS
VREF
C/S-
C/S+
E/A+
E/A-
COMP
CT
SHUTDOWN
VIN
BOUT
VC
GND
AOUT
SYNC
RT
UC1846, UC1847, UC2846
UC2847, UC3846, UC3847
SLUS352C – JANUARY 1997 – REVISED DECEMBER 2015
www.ti.com
10 Layout
10.1 Layout Guidelines
Place a low ESR and ESL decoupling capacitor CREF in the 1-µF to 2.2-µF range, preferably ceramic, from
VREF pin to GND.
The EA+ is a non-inverting input, the EA– is an inverting input and the COMP is the output of the error
amplifier. Place resistor and capacitor series network between EA+ pin and COMP pin, and reduce the trace
of resistor and capacitor series network as much as possible.
Place a low ESR and ESL capacitor CT, preferably ceramic, from CT pin to GND, and place CT close to
UCx846/7 as much as possible.
Place a resistor RT from RT pin to GND, and place RT close to UCx846/7 as much as possible.
10.2 Layout Example
Figure 12. UCx84x Layout Example
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Copyright © 1997–2015, Texas Instruments Incorporated
Product Folder Links: UC1846 UC1847 UC2846 UC2847 UC3846 UC3847


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