XOCECO TS2050, Руководство по обслуживанию

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11
30 Mute, high
Level availability
0 35 VDD 5.00
31 I2C DATA 5.00 34 x T2 4.50
32 I2C CLOCK 5.00 33 x T1 2.70
KA5Q0565RT
Function introduction to pin
pin name function Reference
Voltage(V)
1 Drain drain output of MOSFET, current-limiting checking point of
internal drain current. 283
2 GND source of MOSFET,common ground and reference of circit
controlled by source. 0
3 Vcc Control cicuit power input, provide starting and stabling
Operating current. 23
4 Vfb Connect it with inverting input terminal of PWM comparator
,the collector of optical coupler can be connected to
it. To work stably , connect a capacitor between it and
the ground. If the voltage upon it reaches to 7.5V, the
overvoltage protection will work. 1.35
5 Sync Connect it with sync detector for quasi-resonance vonversion.
Normal quasi-resonance work, threshold voltage upon sync
comparator is 4.6V/2.6V. while expanding quasi-resonance
operating mode, the threshold voltage will change to
3.0V/1.8V. 5.65