l6590a STMicroelectronics, l6590a Datasheet - Page 7

• Manufacturer Part Number: l6590a
• Description: Fully Integrated Power Supply
• Manufacturer: STMicroelectronics

Figure 7. IC Operating Current
Figure 8. Switching Frequency vs.
Figure 9. Vcc clamp vs. Temperature
Icc [mA]
4.4
4.2
3.8
3.6
3.4
3.2
fsw [kHz]
80
70
60
50
40
30
20
10
VCCclamp [V]
17.8
17.6
17.4
17.2
4
3
-50
18
17
7
-50
MOSFET switching @ 22 kHz
8
Temperature
0
9
0
Normal operation
10
Standby
Vcc [V]
Tj [°C]
Tj [°C]
50
11
50
12
100
100
13
Tj = 125 °C
Tj = -25 °C
I
I
Tj = 25 °C
clamp
clamp
= 20 mA
= 10 mA
14
150
150
15
Figure 10. OVP Threshold vs. Temperature
Figure 11. OCP Threshold vs. Current Slope
Figure 12. OCP threshold vs. Temperature
Vth [V]
15.8
15.6
15.4
15.2
Ipklim / (Ipklim @ di/dt = 120 mA/µs)
1.06
1.04
1.02
0.98
0.96
Ipklim / (Ipklim @ Tj = 25°C)
1.08
1.06
1.04
1.02
0.98
1.1
16
15
1
1
-50
-50
50
100
0
0
di/dt = 120 mA/µs
dI/dt [mA/µs]
Tj = 25 °C
Tj [°C]
Tj [°C]
150
50
50
100
200
100
L6590A
150
250
150
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