คำตอบที่ 3
ถ้ามีร้านหนึ่ง น่าจะมีอีกหลายๆๆร้านเด้อ อิอิ
MC34060A, MC33060A
Fixed Frequency, PWM,
Voltage Mode Single Ended
Controllers
The MC34060A is a low cost fixed frequency, pulse width
modulation control circuit designed primarily for singleended
SWITCHMODE power supply control.
The MC34060A is specified over the commercial operating
temperature range of 0° to +70°C, and the MC33060A is specified
over an automotive temperature range of 40° to +85°C.
Complete Pulse Width Modulation Control Circuitry
OnChip Oscillator with Master or Slave Operation
OnChip Error Amplifiers
OnChip 5.0 V Reference, 1.5% Accuracy
Adjustable DeadTime Control
Uncommitted Output Transistor Rated to 200 mA Source or Sink
http://www.datasheetcatalog.com/datasheets_pdf/M/C/3/3/MC33060AP.shtml
http://www.ic2ic.com/search.jsp?sSearchWord=mc33060ap