參數資料
型號: L4992
廠商: 意法半導體
英文描述: TRIPLE OUTPUT POWER SUPPLY CONTROLLER
中文描述: 三路輸出電源控制器
文件頁數: 23/26頁
文件大?。?/td> 296K
代理商: L4992
0.001
0.005 0.01
0.05
0.5
0.1
1
10
100
f
s
(KHz)
D96IN428A
Vin=6V
Vin=20V
V
=5.1V
OSC=2.5V
I
O
(A)
0.1
Figure 19:
Switching Frequency vs Output Cur-
rent (pulse skipping)
0.001
0.005 0.01
0.05
0.5
0.1
1
10
100
f
s
(KHz)
D96IN427A
Vin=6V
Vin=20V
V
=3.3V
REG12=OPEN
OSC=2.5V
I
O
(A)
0.1
Figure 18:
Switching Frequency vs Output Cur-
rent (pulse skipping)
0.001
0.0050.01
0.05 0.1
0.5 1
5 I
OUT5
(A)
87
88
89
90
91
92
EFF.
(%)
Vin=6V
Vin=20V
D97IN581
93
Figure 16:
Demo Board Overall Efficiency (Iout3
= 3A, REG12 = OPEN, OSC = GND)
0.001
0.0050.01
0.05 0.1
0.5 1
5I
OUT3
(A)
89
90
EFF.
(%)
Vin=6V
Vin=20V
D97IN582
91
92
93
Figure 17:
Demo Board Overall Efficiency (Iout5
= 3A, REG12 = OPEN, OSC = GND)
DEMO BOARD-EVALUATION
(continued)
0
20
40
60
80
100 I
OUT
(mA)
4.85
4.90
4.95
5.00
5.05
V
OUT
(V)
D97IN583
Figure 20:
REG5 Regulator Characteristic (Vin =
6V, RUN3 = RUN5 = LOW, Tj = 25°C)
0
50
100
150
200
I
OUT
(mA)
0
2
4
6
8
10
12
V
OUT
(V)
D97IN584
Figure 21:
12V Linear Regulator Characteristic
(V13IN = 15V, RUN3 = HIGH, Tj = 25 °C)
L4992
23/26
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