tsi-20n Traco Power, tsi-20n Datasheet - Page 3

• Manufacturer Part Number: tsi-20n
• Description: High Effiency Dc /dc Converter - 20 Watt Tsi-20n Series
• Manufacturer: Traco Power

Standard Connection Circuit Diagram
Method of Adjusting Output Voltage
To calculate external resistance, please refer to the equation below. After calculating external resistance, please check output voltage
and adjust resistance value.
When using at 3.3V without adjusting output voltage, keep V.ADJ pin (12Pin) open.
By connecting a resistor between +Vout pin (9~11Pin)~V.ADJ pin (12Pin), you can adjust the output voltage in the range of 0.8~3.3V.
(Vout Down Control)
By connecting a resistor between Vadj pin (12Pin)~GND pin (5~8Pin), you can adjust the output voltage in the range of 3.3V~3.6V.
(Vout Up Control)
5,6,7,8
S eries
B S V
Note 1: When not using the ON/OFF control, keep ON/OFF pin open.
Note 2: When not adjusting output, keep V.ADJ pin open.
Note 3: When it includes inductance in input line or switch ing element is connected to the input side or the wire is long,
Recommended Capacitor
C1=33 µF10WV
C2=2.2 µF~22µF
C2: An output capacitor is built-in so it is not required, however by connecting 2.2 µF~22 µF you can lower the noise more
Note 4: There is no +S, Pin in TSI 20N-0510V SIP type.
V s
to fulfill the performance C1 will be required. Also to lower the input impedance we recommend a pattern that has an
additional C1, and to verify on a actual equipment. Or, by adding C2 you can lower the output ripple more.
V in
R x
R y
G N D
R z
Figure 7
C 1
12
9,10 ,1 1
V .AD J
+V ou t
on/off
V in
S W
O pen = O n
S hort= O ff
TSI20N
Series
S eries
R 1
R 2
B S V
Lo ad
G N D
Figure 6
V out
V adj
-S
+ S
R 1:V out D own s etted res istor
R 2:V out U P
R 1
R 2
setted resis tor
To set in the range of 0.8V~3.3V
To set in the range of 3.3V~3.6V
Vo= Requested output V Adjustable voltage range=0.8~3.6V
Rx=10.2k ohm
Ry=2.7k ohm
Rz=0.1K ohm
Vs=0.703V
R2=
C 2
V out
R1=
Ry (Vo-Vs) -Rx × Vs
Rx × Vs-Ry (Vo-Vs)
Rx × Ry × Vs
Rx × Ry (Vo-Vs)
Load
TSI 20N Series
-Rz
-Rz
3