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AN1317 - APPLICATION NOTE

Fig. 10 illustrates the Buck behavior in low load and low input voltage conditions, as described in section

2.1. The output voltage is clamped to 15V by the zener diode.

At the opposite, as shown in fig. 11 and fig. 12, the output voltage regulation of the Inverter is much better

whatever are the load and the input voltage.

Figure 11: Typical output characteristic of the fig. 5 Inverter schematic

Figure 12: Inverter non isolated - Output voltage versus load and input voltage

0

50

100

150

200

250

300

-Iout (mA)

7

8

9

10

11

12

13

14

-Vout (V)

Vin = 200V

Vin = 100V

Vin = 300V

0

50

100

150

200

250

300

350

Vin (V)

0

5

10

15

-Vout (V)

-100mA

-30mA

-5mA

0mA