AN2744 datasheet(7/56 Pages) STMICROELECTRONICS

7 / 56 page

AN2744

Electrical characteristics

7/56

Electrical characteristics

Table 1.

Electrical characteristics of the ST7538Q dual channel reference design

Parameter

Value

Notes

Min.

Typ.

Max.

Operating condition

Ambient operating

temperature

85 °C

If junction temperature

exceeds 180 °C the device

shuts down

Transceiver section

Selectable channel frequencies: 72 kHz (CH1), 86 kHz (CH2)

Transmitting specifications (Tx Mode)

Transmitting output voltage

level

2 VRMS

2.25 VRMS

R20 = 3.9 k

Ω, R22=2.2 kΩ

– see Table 2

Transmitting output current

limit

325 mARMS

R19 = 2 k

Ω – see Figure 2

Second harmonic distortion

-55 dB

Loaded with CISPR 16-1

network

Third harmonic distortion

-61 dB

Loaded with CISPR 16-1

network

50 Hz attenuation

100 dB

Receiving specifications (Rx Mode)

Minimum detectable Rx signal

53 dB/µVRMS

BER<10-3, negligible noise

Auxiliary supply

5 V linear regulator (VDC)

output voltage

-5%

5.05 V

+5%

ST7538Q internally generated

5 V linear regulator (VDC)

current capability

100 mA

Power supply section

AC mains voltage range

85 V

265 V

Mains frequency

50-60 Hz

Output voltage

-10%

10 V

+10%

Green LED ON

Output voltage ripple

IOUT = 600 mA, VIN=85 VAC

Output current

600 mA

Output power

5.6 W

Efficiency at POUT = 3.5 W

70%

Nominal transformer

isolation(1)

4 kV

Primary to secondary/

secondary to auxiliary

Number of holdup cycles

AN2744 数据表(PDF) 7 Page - STMicroelectronics

AN2744 数据表(HTML) 7 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56

数据表下载