AN2744 datasheet(8/56 Pages) STMICROELECTRONICS

8 / 56 page

Electrical characteristics

AN2744

8/56

Note:

EN50065-1 normative compliance is not guaranteed with a signal level at mains output

greater than 2 VRMS

Parameter

Value

Notes

Input power

100 mW

Switching frequency

-10%

60 kHz

+10%

Transceiver section in Tx mode

ST does not guarantee transformer isolation. ST assumes no responsibility for the consequences that may result from that

risk.

Table 1.

Electrical characteristics of the ST7538Q dual channel reference design (continued)

Table 2.

Output signal level setting through VSENSE partitioning - typical values

VOUT [VRMS]VOUT [dBuVRMS](R7 + R8) / R8

R7 [kΩ]R8 [kΩ]

1.000

120

1.25

0.910

2.2

1.125

121

1.4

1.3

2.2

1.250

122

1.6

2.2

1.500

124

2.0

2.7

2.2

1.800

125

2.25

3.3

2.2

2.000

126

2.5

3.9

2.2

2.250 (Note 1)

127

2.8

4.7

2.2

2.500 (Note 1)

128

3.15

6.8

2.2

3.000 (Note 1)

130

4.0

7.5

2.2

Figure 2.

Typical curve for output current limit vs. RCL value

100

150

200

250

300

350

400

1.75

2.25

2.5

2.75

3.25

3.5

3.75

4.25

4.5

4.75

Rcl (kOhm)

100

150

200

250

300

350

400

1.75

2.25

2.5

2.75

3.25

3.5

3.75

4.25

4.5

4.75

Rcl (kOhm)

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