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L4992 데이터시트(PDF) 23 Page - STMicroelectronics

부품명 L4992
상세설명  TRIPLE OUTPUT POWER SUPPLY CONTROLLER
PDF  26 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L4992 데이터시트(HTML) 23 Page - STMicroelectronics

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0.001
0.005 0.01
0.05
0.5
0.1
1
10
100
fs
(KHz)
D96IN428A
Vin=6V
Vin=20V
VO=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
fs
(KHz)
D96IN427A
Vin=6V
Vin=20V
VO=3.3V
REG12=OPEN
OSC=2.5V
I
O
(A)
0.1
Figure 18: Switching Frequency vs Output Cur-
rent (pulse skipping)
0.001
0.005 0.01
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
0.005 0.01
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
20406080
100 IOUT(mA)
4.85
4.90
4.95
5.00
5.05
VOUT
(V)
D97IN583
Figure 20: REG5 Regulator Characteristic (Vin =
6V, RUN3 = RUN5 = LOW, Tj = 25°C)
0
50
100
150
200
IOUT(mA)
0
2
4
6
8
10
12
VOUT
(V)
D97IN584
Figure 21: 12V Linear Regulator Characteristic
(V13IN = 15V, RUN3 = HIGH, Tj = 25 °C)
L4992
23/26



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