10
0 0.2 0.4 0.6 0.8 1 1.2
6
8
10
12
14
16
Isource [A]
Vsat = V [V]
Vcc = Vc = 15V
Tj = 25
°
C
图示 10. 输出 饱和.
0 0.2 0.4 0.6 0.8 1 1.2
0
0.5
1
1.5
2
2.5
Isink [A]
10
Vsat = V [V]
Vcc = Vc = 15V
Tj = 25
°
C
图示 11. 输出 饱和.
1 10 100 1000 10000
0
40
80
120
fsw (hz)
SVRR (db)
Vcc=15V
vp-p=1v
图示 9. Vref SVRR vs. 切换 频率.
0 200 400 600 800 1,000 1,200 1,400
0
10
20
30
40
50
Vpin10 [mV]
Ipin10 [mA]
Vcc < Vccon
在之前转变-在
图示 12. UVLO 饱和
10 20 30 40
10
20
50
100
200
500
1000
2000
5000
Rt (kohm)
fsw (khz)
100pF
220pF
470pF
1nF
2.2nf
5 .6nf
Tj = 25
°
C
Vcc = 15v, V15 =0V
图示 13. 定时电阻 vs.切换频率.
-50 -25 0 25 50 75 100 125 150
280
290
300
310
320
Tj (
°
c)
fsw (khz)
Rt= 4.5kohm, Ct = 1nF
Vcc = 15v,V15=Vref
图示 14. 切换 频率 vs. tempera-
ture.
L5991 - L5991A
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