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LM2576 bảng dữ liệu(PDF) 10 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
tên linh kiện LM2576
Giải thích chi tiết về linh kiện  SIMPLE SWITCHER 3A Step-Down Voltage Regulator
PDF  24 Pages
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nhà sản xuất  NSC [National Semiconductor (TI)]
Trang chủ  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2576 bảng dữ liệu(HTML) 10 Page - National Semiconductor (TI)

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Test Circuit and Layout Guidelines
As in any switching regulator, layout is very important. Rap-
idly switching currents associated with wiring inductance
generate voltage transients which can cause problems. For
minimal inductance and ground loops, the length of the leads
indicated by heavy lines should be kept as short as possible.
Single-point grounding (as indicated) or ground plane con-
struction should be used for best results. When using the
Adjustable version, physically locate the programming resis-
tors near the regulator, to keep the sensitive feedback wiring
short.
Fixed Output Voltage Versions
01147607
CIN — 100 µF, 75V, Aluminum Electrolytic
COUT — 1000 µF, 25V, Aluminum Electrolytic
D1 — Schottky, MBR360
L1 — 100 µH, Pulse Eng. PE-92108
R1 — 2k, 0.1%
R2 — 6.12k, 0.1%
Adjustable Output Voltage Version
01147608
where VREF = 1.23V, R1 between 1k and 5k.
FIGURE 2.
www.national.com
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