TSM1014 STMicroelectronics, TSM1014 Datasheet - Page 7

• Manufacturer Part Number: TSM1014
• Description: Low Consumption Voltage and Current Controller for Battery Chargers and Adaptors
• Manufacturer: STMicroelectronics

Principles of Operation and Application Tips
5.5 Voltage clamp
The following schematic shows how to realize a low-cost power supply for the TSM1014 (with no
additional windings).Please pay attention to the fact that in the particular case presented here, this low-
cost power supply can reach voltages as high as twice the voltage of the regulated line. Since the
Absolute Maximum Rating of the TSM1014 supply voltage is 28V. In the aim to protect he TSM1014
against such how voltage values a internal zener clamp is integrated.
Figure 4: Clamp voltage
Figure 5: Voltage controller and over current detection schematic
+
R4
100K
R5
10K
Rsense
1
3
Vsense
Cc+
IL
Cc-
Vref
Vcc
Ric2
1K
Vcc
CV
CC
TSM1014
R
Gnd
limit
Rlimit
28V
CV Out
CC Out
Ivz
=
Cv-
V
cc
Vcc
–
5
4
7
V
Vz
28V
z
Ric1
22K
R3
1k
Rvc1
22K
CV
I
vz
To primary
Cvc1
2.2nF
OCP
Cic1
2.2nF
R6
1K
D
R2
R1
+
IL
TSM1014
OUT+
OUT-
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