Datasheet

VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E Operations
Doc ID 12050 Rev 2 7/21
4 Operations
4.1 Rectangular U-I output characteristics
Figure 4. Rectangular U-I output characteristics for battery charger
A complete regulation scheme can achieve combined and accurate output characteristics.
Figure 4. presents a secondary feedback through an optocoupler driven by a TSM101. This
device offers two operational amplifiers and a voltage reference, thus allowing the regulation
of both output voltage and current. An integrated OR function performs the combination of
the two resulting error signals, leading to a dual voltage and current limitation, known as a
rectangular output characteristic. This type of power supply is especially useful for battery
chargers where the output is mainly used in current mode, in order to deliver a defined
charging rate. The accurate voltage regulation is also convenient for Li-ion batteries which
require both modes of operation.
T1
D3
C5
C4
-+
D4
C3
T2
F1
C1
C10
-
+
-
+
Vref
Vcc
GND
U2
TSM101
R6
R9
R10
R4
C9
R7
R5
R8
C8
R3
ISO1
D2
D5
R2
C7
R1
C2
D1
FB
VDD DRAIN
SOURCE
CONTROL
U1
VIPerX2A
C6
AC IN
DCOUT
GND