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UC1825-SP bảng dữ liệu(PDF) 7 Page - Texas Instruments

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tên linh kiện UC1825-SP
Giải thích chi tiết về linh kiện  RAD-TOLERANT CLASS V, HIGH-SPEED PWM CONTROLLER
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UC1825-SP bảng dữ liệu(HTML) 7 Page - Texas Instruments

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INV
NON INV
Error Amplifier Output
VREF 5.1 V
200 W
UC1825
Simplified Schematic
1
2
3
16
100
80
60
40
40
0
−20
f − Frequency − Hz
0
1 K
10 K 100 K
1 M
10 M 100 M
0
OPEN LOOP FREQUENCY RESPONSE
−90
−180
AV
0
5
4
3
2
0
0.2
0.4
0.6
1
0.8
1
VIN
VIOUT
t − Time − ms
UNITY GAIN SLEW RATE
UC1825-SP
www.ti.com
SLUS870A – JANUARY 2009 – REVISED MARCH 2012
PRINTED CIRCUIT BOARD LAYOUT CONSIDERATIONS
High speed circuits demand careful attention to layout and component placement. To ensure proper performance
of the UC1825 follow these rules:
1. Use a ground plane.
2. Damp or clamp parasitic inductive kick energy from the gate of driven MOSFETs. Do not allow the output
pins to ring below ground. A series gate resistor or a shunt 1-A Schottky diode at the output pin serves this
purpose.
3. Bypass VCC, VC, and VREF. Use 0.1-μF monolithic ceramic capacitors with low equivalent series inductance.
Allow less than 1-cm of total lead length for each capacitor between the bypassed pin and the ground plane.
4. Treat the timing capacitor, CT, like a bypass capacitor.
Figure 2. Error Amplifier
Copyright © 2009–2012, Texas Instruments Incorporated
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