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CS51221 bảng dữ liệu(PDF) 6 Page - ON Semiconductor

tên linh kiện CS51221
Giải thích chi tiết về linh kiện  Enhanced Voltage Mode PWM Controller
PDF  14 Pages
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nhà sản xuất  ONSEMI [ON Semiconductor]
Trang chủ  http://www.onsemi.com
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CS51221 bảng dữ liệu(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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