參數(shù)資料
型號(hào): TC170
廠商: Microchip Technology Inc.
英文描述: CMOS Current Mode PWM Controller
中文描述: CMOS電流模式PWM控制器
文件頁數(shù): 5/8頁
文件大小: 104K
代理商: TC170
4-123
TELCOM SEMICONDUCTOR, INC.
7
6
5
4
3
1
2
8
CMOS CURRENT MODE
PWM CONTROLLER
TC170
4
3
3.15 CURRENT-
SENSE
AMPLIFIER
C
R*
(A) Ground Reference
*OPTIONAL RC FILTER
I
I
4
3
TC170
VOUT
RS
(B) Above-Ground Resistive Sensing
TC170
RS
3.15 CURRENT-
SENSE AMPLIFIER
×
×
+
+
Figure 1. R1 and R2 Set Maximum Peak Output Current
Figure 2. Resistive Sensing
TC170
SWITCH
CURRENT
3.15 CURRENT-SENSE
AMPLIFIER
×
0.75V
+
4
3
7
5
6
VDD
100 A
V1
ERROR
AMPLIFIER
POSITIVE
FEEDBACK
Q2
350mV
Q3
SHUTDOWN
COMPARATOR
350mV
6k
Q4
FROM
UNDERVOLTAGE
LOCKOUT
10
PWM LATCH
S
S
R
Q
LOCK-UP
AMPLIFIER
IL
3.5k
Q1
PWM COMPARATOR
"A" = 1
OUTPUT
OFF (LOW)
VREF
5.1V
2
R1
V1
R2
16
LIMIT
BUFFER
AMPLIFIER
RS
1
+
+
+
+
+
+
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