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UC2845AD1 数据表(PDF) 9 Page - STMicroelectronics

部件名 UC2845AD1
功能描述  HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
PDF  16 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

UC2845AD1 数据表(HTML) 9 Page - STMicroelectronics

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UC384XA - UC284XA
Figure 21. Isolated MOSFET Drive and Current Transformer Sensing.
Figure 22. Latched Shutdown.
7
6
COMP/LATCH
ISOLATION
BOUNDARY
D95IN349
5.0Vref
VCC
+
-
+
-
Q
S
R
3
R
RS
NS
C
Vin
Q1
NP
VGS Waveforms
+
0
+
0
-
-
50% DC
25% DC
Ipk =
V(pin 1) -1.4
3RS
NS
NP
()
D95IN350
BIAS
+
-
EA
R
+
OSC
2N
3905
2N
3903
1mA
R
R
2R
1
2
8
4
SCR must be selected for a holding current of less than 0.5mA at TA(min).
The simple two transistor circuit can be used in place of the SCR as shown. All resistors are 10K.
5



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