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ASM8P1843 Datasheet(PDF) 2 Page - Alliance Semiconductor Corporation

Part # ASM8P1843
Description  Voltage Mode PWM Controller with EMI Reduction
PDF  11 Pages
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Manufacturer  ALSC [Alliance Semiconductor Corporation]
Direct Link  https://www.alliancememory.com
Logo ALSC - Alliance Semiconductor Corporation

ASM8P1843 Datasheet(HTML) 2 Page - Alliance Semiconductor Corporation

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ASM8P18S42 / ASM8P18S42ER
ASM8P1843 / ASM8P18S43ER
June 2005
ASM8P18S44ER / ASM8P18S45ER
rev 0.6
Voltage Mode PWM Controller with EMI Reduction
2 of 11
Notice: The information in this document is subject to change without notice.
Logic Block Diagram
Pin Diagram
8-Pin MicroSO, P-DIP and SOIC
Pin Description
Pin #
Pin Name
Function
1
COMP
Input of the PWM Comparator and output of the error amplifier
2
FB
Feedback, inverting input of the error amplifier
3
ISNS
Current sense comparator input
4
FSEL
External capacitor selects PWM frequency
5
GND
Ground
6
OUT
SS modulated PWM output
7
VDD
Supply voltage
8
VREF/ RD
5V output for ASM8PI8S42 and ASM8PI843 parts. External resistor ”
RD”
to GND sets the modulation spread for the parts with ER suffix.
ISNS
GND
PWM
SS MOD
Control
OL + UC
SENSE
UVLO
THERMAL
SHUTDOWN
VBG
DRIVER
Error
Amp
COMP
FB
OUT
VREF
VDD
FSEL
1
2
3
4
8
7
6
5
ASM8P18S42
COMP
FB
ISNS
FSEL
GND
OUT
VDD
VREF
ASM8P1843
COMP
1
2
3
4
8
7
6
5
FB
ISNS
FSEL
GND
OUT
VDD
RD
ASM8P18S42ER
ASM8P18S43ER
ASM8P18S44ER
ASM8P18S45ER



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