TLE 4305
SMPS with TLE 4305 Secondary Regulator
The TLE 4305 is located on the secondary side of the regulator and controls the output
voltage as well as it limits the output current. Voltage and current can be chosen
independent from each other by the designer according to the application’s
requirements.
L
S
SMPS
Primary
Side
n
1
n
3
D1
RGL34D
n
2
TLE 4305G
VSE
V
Q
+
Line
R
V1
V
S
VCO
C
VCO
10 nF
R
V2
Cool Set
TDA 1683x
PWM Duty
Cycle
= f(
V
FB
)
FB
C
S
100 nF
CCO
C
CCO
10 nF
C
S2
C
L
C
S1
CRE
GND
CSE
OUT
-
470
µ
F
R
Sense
D2
SMS2100
Optocoupler
AES02878
Figure 4
Application Circuit
(1)
(2)
V
Q
= 2.5 V
×
(
R
V1
+
R
V2
) /
R
V2
I
Q
= 0.2 V /
R
Sense
Figure 3
shows the TLE 4305 as SMPS secondary regulator as application circuit. The
load capacitor
C
L
is charged by the PWM-signal at the secondary side of the transformer.
The diode D2 defines the current flow in the transformer.
Data Sheet
9
Rev. 2.2, 2008-11-17
INFINEON [ INFINEON TECHNOLOGIES AG ]
