AS1324 데이터 시트보기 (PDF) - austriamicrosystems AG
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AS1324 Datasheet PDF : 21 Pages
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AS1324
Datasheet - Detailed Description
8 Detailed Description
The AS1324 is a high-efficiency buck converter that uses a constant-frequency current-mode architecture. The device contains two internal
MOSFET switches and is available in adjustable- and fixed-output voltage versions.
Figure 21. AS1324 - Block Diagram
Ramp
Compensator
OSC
OSCN
5
VOUT/VFB
1
EN
Frequency
Shift
0.6V
R1
FB
R2
0.6V +
∆VOVL
0.6V
Reference
0.6V -
∆VOVL
+
Error
Amp
–
–
OVDET
+
–
+
Shutdown
Not applicable to AS1324
AS1324-12: R1 + R2 = 600kΩ
AS1324-15: R1 + R2 = 750kΩ
AS1324-18: R1 + R2 = 900kΩ
–
ICOMP
+
AS1324
4
VIN
VIN
CIN
10µF
Digital
Logic
Anti-
Shoot
Through
PMOS
+
IRCMP
–
NMOS
3
4.7µH
SW
2
GND
VOUT
COUT
10µF
www.ams.com/DC-DC_Step-Up/AS1324
Revision 1.06
8 - 21
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