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TC170 датащи(PDF) 7 Page - Microchip Technology

номер детали TC170
подробное описание детали  CMOS Current Mode PWM Controller
PDF  16 Pages
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производитель  MICROCHIP [Microchip Technology]
домашняя страница  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

TC170 датащи(HTML) 7 Page - Microchip Technology

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© 2002 Microchip Technology Inc.
DS21395B-page 7
TC170
FIGURE 3-1:
R1 AND R2 SET MAXIMUM PEAK OUTPUT CURRENT
FIGURE 3-2:
GROUND REFERENCE
RESISTIVE SENSING
FIGURE 3-3:
ABOVE GROUND
RESISTIVE SENSING
TC170
Switch
Current
x 3.15 Current Sense
Amplifier
0.75V
–
+
4
3
7
5
6
V1
Error
Amplifier
Q2
350mV
Q3
350mV
6k
Ω
Q4
From
Undervoltage
Lockout
10
PWM Latch
S
S
R
Q
Lock-Up
Amplifier
IL
Q1
"A" = 1
Output
Off (Low)
VREF
5.1V
2
V1
R2
16
RS
R1
1
+
–
+
–
+
–
+
–
–
+
+
–
PWM Comparator
Limit
Buffer
Amplifier
100
µA
VDD
Positive
Feedback
Shutdown
Comparator
3.5k
Ω
4
3
C
R*
*Optional RC Filter
I
RS
+
–
TC170
x 3.15 Current Sense
Amplifier
I
4
3
RS
+
–
VOUT
x 3.15 Current Sense
Amplifier
TC170



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