3 / 18 page
C2472, C2473 and C2474
Datasheet
RDFC Controllers for Offline Applications
Product data
Page 3 of 18
DS-1423-0709C
© Cambridge Semiconductor Ltd 2007
26-Sep-2007
TYPICAL APPLICATION CIRCUIT
The C2472, C2473 and C2474 controllers are intended primarily for single input voltage AC/DC applications,
such as replacement of line frequency linear transformer power supplies. These versatile controllers support
a wide range of applications at low cost. A typical circuit configuration is shown in Figure 3.
Figure 3: Typical RDFC Application Schematic
Typical 12 W Charger Performance
Input
115 V ac
Output
12 V, 1 A dc
Efficiency
> 80%
No-load power input
< 150 mW
Typical Maximum Application Rated Power
Power Switch
(Q1) Gain
115 Vac
230 Vac
Standard
20 W
40 W
High
40 W
60 W
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