SE1051 SEAWARD [Seaward Electronics Inc.], SE1051 Datasheet - Page 3

• Manufacturer Part Number: SE1051
• Description: Constant Voltage and Constant Current Controller
• Manufacturer: SEAWARD [Seaward Electronics Inc.]

Typical Application
In the above application schematic, the SE1051 is used on the secondary side of a flyback adapter (or battery
charger) to provide an accurate control of voltage and current. The above feedback loop is made
with an optocoupler.
Block Diagram
Revision 12/4/2008
Cs
Rs
1.210 V
Fig.1 Typical Adapter or Battery Charger Application Using SE1051
240mV
Preliminary and all contents are subject to change without prior notice.
Ictrl
© Seaward Electronics, Inc., 2006. • www.seawardinc.com.cn • Page 3
Rsen se
1.21 0V
Vsense
CCL
VCL
240mV
Ictrl
Vcc
V
I
LIMIT
OUT
SE1051
Ric2
=
=
Vout
GND
Vctrl
V
V
R
REF
Vcc
SENSE
SENSE
×
Vsense
R
VCL
CCL
1
R
+
1
22 pF
Rout
Ric1
R
C2
Cic1
2.2nF
2
Vout
GND
Vctrl
To prim a ry
Rvc1
Cvc1
2.2nF
R2
R1
Vout+
Vout-
Lo ad