at1736 Aimtron Technology, at1736 Datasheet - Page 17

• Manufacturer Part Number: at1736
• Description: Lcd Panel Power Supplies With High-current Operational Amplifiers
• Manufacturer: Aimtron Technology

PC Board Layout
1. The most critical aspect of the layout is the placements of the input bypass
2. Power loops on the input and output of the converters should be connected with the
3. The feedback resistors should connect to FB pins as close as possible. And each
4. Separate the power ground and analog signal ground into different planes to
7F, No.9,PARK AVENUE. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: [phone]
10/19/2007 REV:0.5
capacitors of pin IN, VDDOP, VPSRC and REF. They must be placed as close as
possible to the AT1736 to reduce the input ripple voltage and noise coupling.
shortest and widest traces as possible. The long and narrow trace increases the ESR
and ESL, and that will induce more effective noise at high frequency easily.
route connected to output should be away from the switching noise source, such as
charge-pump and step-up converter power loops.
prevent the interference, and connect these two parts at the VMAIN output ground.
Middle ground layer 1
Top-layer
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17
High-Current Operational Amplifiers
Preliminary Product Information
LCD Panel Power Supplies with
WWW:
Email:
Middle ground layer 2
Bottom-layer
http://www.aimtron.com.tw
[e-mail]
AT1736