Hi,

Now my case using the capacitor-divider to generate a 9mA current for
payload.
This circuit can work fine, but the C1(0.47uF,630V) is too big to us.
It's volume is nearly: 29mm*13mm*20mm(height),
[image: http://91mcu.bokee.com/inc/AC-DC.bmp]
Now I found another capacitor on the TDK's website:
http://www.tdk.co.jp/tefe02/e415_ckg.pdf
Quote:
2-chip Piled Multilayer Ceramic Capacitors
CKG Series CKG32K Type
FEATURES
=95 No polarity.
=95 Twice the capacitance is obtainable on a single capacitor space.
=95 Unique construction provides high reliablity.
=95 The metal caps absorbs stress from thermal and mechanical
shocks, ensuring excellent performance on aluminum circuit
substrates.
=95 Low ESR and ESL promises excellent characteristics for high
frequency switching power supply.
APPLICATIONS
Smoothing circuits, temperature variable applications,
Maintenance free power supplies, DC to DC converters, automotive
applications.
it seems very small.

Now my problemis :Can I use it in my design to replace the orginal
capacitor?

Thanks in advance!
--
E-elephant
-- =

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