TLE4305_08 Datasheet, PDF (9/16 Pages) Infineon Technologies AG – Voltage-Current Regulator Wide supply voltage operation range

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.
Line
SMPS
Primary
Side
n₁
L_S
n₃
D1
RGL34D
n₂
TLE 4305G
VSE
V_S
VCO
R_V1
C_VCO
R_V2
10 nF
Cool Set
TDA 1683x
PWM Duty
Cycle
= f(V_FB)
FB
C_S
100 nF
C_L
470 µF
CCO
C_CCO
10 nF
CRE
D2
SMS2100
GND
CSE OUT
R_Sense
V_Q
+
C_S2
C_S1
-
Optocoupler
AES02878
Figure 4 Application Circuit
V_Q = 2.5 V × (R_V1 + R_V2) / R_V2
(1)
I_Q = 0.2 V / R_Sense
(2)
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