L4973D5.1 데이터 시트보기 (PDF) - STMicroelectronics
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L4973D5.1 Datasheet PDF : 16 Pages
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L4973V3 - L4973V5 - L4973D3 - L4973D5
ELECTRICAL CHARACTERISTICS (continued)
Sink Output Current
Supply Voltage Ripple
Rejection
DC Open Loop Gain
Transconductance
OSCILLATOR SECTION
Ramp valley
Ramp peak
Maximum Duty Cycle
Maximum Frequency
SYNC FUNCTION
High Input Voltage
Low Input Voltage
Slave Sink Current
Master Output Amplitude
Output Pulse Width
VCOMP = VFB
CREF =4.7µF 1-5mA load
current
RL = ∞
Icomp = -0.1 to 0.1mA;
Vcomp = 6V
VCC = 8V
VCC = 55V
Duty Cycle = 0%; ROSC =
13KΩ; COSC = 820pF;
VCC = 8V to 55V
VCC = 8V to 55V
Isource = 3mA
no load, Vsync = 4.5V
(*) Pulse testing with a low duty cycle.
(**) The maximum power dissipation of the package must be observed.
200
300
µA
60
80
dB
50
60
dB
2.5
mS
0.78 0.85 0.92
V
1.9
2.1
2.3
V
9
9.6
10.2
V
95
97
%
500
KHz
3.5
V
0.9
V
0.15 0.25 0.45
mA
4
4.5
V
0.20 0.35
µs
Figure 1. Evaluation Board Circuit
VCC
R2
C1 C2 C7
(DIP18)
7,8
12
1
17 L4973
9
16
4,5,6 2,3
11 10 13,14,15
C3 C4 C5
R1
C6
C8 L1
3x
D1 C0
VO
R3
C12
R4
C1=1000µF/63V
C2=220nF/63V
C3=470nF
C4=1µF/50V
C5=220pF
C6=22nF
C7=2.7nF
C8=220nF/63V
C0=100µF/40V(C9,C10,C11)
C12=Optional (220nF)
L1=150µH KOOLµ 77310 - 40 Turns - 0.9mm
R1=9.1K
R2=20K
D1=GI SB560
D97IN515B
L4973 V3.3
VO(V)
3.3
R3(KΩ)
0
R4(KΩ)
5.1
2.7
4.7
12
12
4.7
15
16
4.7
18
20
4.7
24
30
4.7
L4973 V5.1
VO(V)
5.1
R3(KΩ)
0
R4(KΩ)
12
6.2
4.7
15
9.1
4.7
18
12
4.7
24
18
4.7
5/16
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