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L5991 Datasheet(PDF) 6 Page - STMicroelectronics

Part No. L5991
Description  PRIMARY CONTROLLER WITH STANDBY
Download  23 Pages
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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L5991 Datasheet(HTML) 6 Page - STMicroelectronics

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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
Figure 11. Output saturation.
0
0.2
0.4
0.6
0.8
1
1.2
0
0.5
1
1.5
2
2.5
Isink [A ]
10
V sat = V
[V]
Vc c = Vc = 15V
T j = 25°C
Figure 12. Output saturation.
1
10
100
1000
10000
0
40
80
120
fsw (Hz)
SVRR (dB)
Vcc=15V
Vp-p=1V
Figure 10. Vref SVRR vs. switching frequency.
0
200
400
600
800
1,000 1,200 1,400
0
10
20
30
40
50
Vpin10 [mV]
Ipin10 [mA]
Vcc < Vccon
before turn-on
Figure 13. UVLO Saturation
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
Figure 14. Timing resistor vs. switching frequency.
-50
-25
0
25
50
75
100
125
150
4.9
4.95
5
5.05
5.1
Tj (°C)
Vref [V]
Vcc = 15V
Iref= 20mA
Figure 9. Vref vs. junction temperature.
L5991 - L5991A
6/23


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