參數(shù)資料
型號: ML4823MJ
廠商: FAIRCHILD SEMICONDUCTOR CORP
元件分類: 穩(wěn)壓器
英文描述: High Frequency Power Supply Controller
中文描述: 2 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16
封裝: SOIC-16
文件頁數(shù): 6/9頁
文件大小: 121K
代理商: ML4823MJ
ML4823
6
REV. 1.0 10/12/2000
ERROR AMPLIFIER
The ML4823 error amplifier is a 5.5MHz bandwidth 12V/μs
slew rate op-amp with provision for limiting the positive
output voltage swing (Output Inhibit line) for ease in
implementing the soft start function.
5
4
3
2
1
0
0.2
0.4
0.6
0.8
1.0
TIME (
μ
s)
V
IN
V
OUT
100
80
60
40
20
0
–20
100
1K
10K
100K
FREQ (Hz)
1M
10M
100M
0
0
–90
–180
GAIN
φ
Figure 5. Unity Gain Slew Rate
Figure 6. Open Loop Frequency Response
OUTPUT DRIVER STAGE
The ML4823 Output Driver is a 2A peak output high speed
totem pole circuit designed to quickly switch the gates of
capacitive loads, such as power MOSFET transistors.
Figure 8. Saturation Curves
3
2
1
0
0
0.5
1.0
1.5
I
OUT
(A)
V
S
(
SOURCE
SINK
Figure 7. Simplified Schematic
POWER
GND
Q1
Q2
OUT
V
CC
POWER
V
C
15
10
5
0
0
40
80
120
160
200
TIME (ns)
T
O
0.2
I
L
(A)
0
–0.2
15
10
5
0
0
100
200
300
400
500
TIME (ns)
T
O
2
I
L
(A)
0
–2
Figure 10 Rise/Fall Time (C
L
= 10,000pF)
Figure 9. Rise/Fall Time (C
L
= 1000pF)
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