Introduction Of - Sony S95E Service Manual

5.2.2 Introduction of IC
TOP247Y:
It cost effectively integrating the high voltage power MOSFET, PWM control, fault protection and
other control circuitry onto a single CMOS chip. The function of each pin and the inside circuit diagram are as
follows:
Pin Symbol
1 C
2 L
3 X
4 S
5 F
7 D
Control Pin, Error amplifier and feedback current input pin for duty cycle control
Line-Sense Pin, Input pin for OV, UV, line feed forward with DCMAX reduction,
remote ON/OFF and synchronization
External Current Limit Pin, Input pin for external current limit adjustment, remote
ON/OFF and synchronization
Source Pin, Output MOSFET source connection for high voltage power return
Frequency Pin, Input pin for selecting switching frequency
Drain Pin, High voltage power MOSFET drain output
Functional Description
32
S95E Sony