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TC170 查看數據表(PDF) - Microchip Technology
零件编号
产品描述 (功能)
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TC170
CMOS Current Mode PWM Controller
Microchip Technology
TC170 Datasheet PDF : 16 Pages
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TC170
Functional Block Diagram
V
REF
2
V
IN
15
5.1-Volt
Reference
R
O
9
C
O
8
Oscillator
Undervoltage
Lockout
10
Sync
(
–
) Current 3
Sense Input
(+) Current
4
Sense Input
7
Comp
(+) Error 5
Amp Input
(
–
) Error 6
Amp Input
x 3.15 Current
–
Amplifier
–
+
+
0.75V
PWM
Comparator
+
–
V
DD
100
µ
A
+
Limit Buffer
Amplifier
–
Q4
R
Q
S
S
PWM Latch
Error
Amplifier
350mV
Lock-up
Amplifier
–
+
Positive
Feedback
Q1 Q2
Q3
3.5k
Ω
DQ
C
Q
TC170
13
V
DD
Output
11
A (
)
14 Output
B( )
12
Ground
1
Current Limit/
Soft-Start Adjust
Shutdown
Comparator
350
mV
6k
Ω
16
Shutdown
NOTE:
Outputs low in OFF state.
DS21395B-page 2
©
2002 Microchip Technology Inc.
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