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CS51221 Arkusz danych(PDF) 6 Page - ON Semiconductor

Numer części CS51221
Szczegółowy opis  Enhanced Voltage Mode PWM Controller
PDF  14 Pages
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Producent  ONSEMI [ON Semiconductor]
Strona internetowa  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

CS51221 Arkusz danych(HTML) 6 Page - ON Semiconductor

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CS51221
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PACKAGE PIN DESCRIPTION
Package
Pin #
Pin
Symbol
Function
1
GATE
External power switch driver with 1.0 A peak capability. Rail to rail output occurs when the capacitive load is
between 470 pF and 10 nF.
2
ISENSE
Current sense comparator input.
3
SYNC
Bidirectional synchronization. Locks to highest frequency.
4
FF
PWM ramp.
5
UV
Undervoltage protection monitor.
6
OV
Overvoltage protection monitor.
7
RTCT
Timing resistor RT and capacitor CT determine oscillator frequency and maximum duty cycle, DMAX.
8
ISET
Voltage at this pin sets pulse−by−pulse overcurrent threshold.
9
VFB
Feedback voltage input. Connected to the error amplifier inverting input.
10
COMP
Error amplifier output.
11
SS
Charging external capacitor restricts error amplifier output voltage during the power up or fault conditions.
12
LGND
Logic ground.
13
VREF
3.3 V reference voltage output. Decoupling capacitor can be selected from 0.01
mF to 10 mF.
14
VCC
Logic supply voltage.
15
PGND
Output power stage ground.
16
VC
Output power stage supply voltage.



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