TNY375-380
Peak Output Power Table
Key Application considerations
230 VAC 1ꢀ5
8ꢀ-26ꢀ VAC
TinySwitch-PK Design Considerations
Product
ILIMIT-
ILIMIT-
ILIMIT-
PEAKred
ILIMIT-
PEAKinc
ILIMITPEAK
ILIMITPEAK
Output Power Table
PEAKred
PEAKinc
Data sheet maximum output power table (Table 1) represents
the maximum practical continuous output power level that can
be obtained under the following assumed conditions:
TNY375P/G/D
TNY376P/G/D
TNY377P/G
TNY378P/G
TNY379P/G
TNY380P/G
8.ꢀ W 14.ꢀ W 16.ꢀ W ꢀ.ꢀ W 11.ꢀ W 12.ꢀ W
10 W
13 W
19 W
23 W
22 W
28 W
6 W
8 W
1ꢀ W
18 W
17 W
23 W
16 W 27.ꢀ W 34 W
18 W 31.ꢀ W 39 W
10 W 21.ꢀ W 27 W
1. The minimum DC input voltage is 100 V or higher for 8ꢀ VAC
input, or 220 V or higher for 230 VAC input or 11ꢀ VAC with
a voltage doubler. The value of the input capacitance should
be sized to meet these criteria for AC input designs.
2. Efficiency of 7ꢀ5.
12 W
14 W
2ꢀ W
28 W
31 W
3ꢀ W
20 W
36 W
4ꢀ W
Table 2.
Peak Output Power Capability vs Current Limit Mode Selection.
3. Minimum data sheet value of I2f.
The values shown in Table 1 for peak power assume operation
in ILIMITPEAKinc. For reference, Table 2 provides peak output
powers for each family member at all three selectable current
limit modes.
4. Transformer primary inductance tolerance of 105.
ꢀ. Reflected output voltage (VOR) of 13ꢀ V.
6. Voltage only output of 12 V with an ultrafast PN rectifier diode.
7. Continuous conduction mode operation with transient KP*
value of 0.2ꢀ.
For both Table 1 and Table 2, the peak output power values are
limited electronically, based on minimum device I2f. Stated
differently, with sufficient heat sinking, these values could be
delivered indefinitely, but in most cases this would be
impractical. Adapter and open frame power values are
thermally limited and represent the practical continuous (or
average) output power in two common thermal environments.
8. Increased current limit is selected for peak and open frame
power columns and standard current limit for adapter
columns.
9. The part is board mounted with SOURCE pins soldered to
sufficient area of copper and/or a heat sink is used to keep
the SOURCE pin temperature at or below 110 °C for P and
G package and 100 °C for D packaged devices.
10. Ambient temperature of ꢀ0 °C for open frame designs and
40 °C for sealed adapters.
Over Voltage Protection
The output overvoltage protection provided by TinySwitch-PK
uses an internal latch that is triggered by a threshold current of
approximately 7 mA into the BYPASS pin. In addition to an
internal filter, the BYPASS pin capacitor forms an external filter,
providing noise immunity from inadvertent triggering. For the
bypass capacitor to be effective as a high frequency filter, it
*KP. Below a value of 1, KP is the ratio of ripple to peak primary
current. A transient KP limit of ≥0.2ꢀ is recommended to avoid
premature termination of switching cycles due to initial current
limit (IINIT) being exceeded, which reduces maximum output
power capability.
C9
2.2 nF
250 VAC
C4
1000 µF
16 V
C5
220 µF
16 V
C3
1000 µF
16 V
D5
SB560
T1
EFD25
+12 V
RTN
1
3
9,10
D1
L2
3.3 µH
1N4007
VR3
P6KE170A
C8
D2
F1
3.15 A
10 nF
1 kV
1N4007
L
C2
6,7,8
22 µF
400 V
C1
10 µF
400 V
R7
22 Ω
1/2 W
185 - 265
VAC
R9
3.9 MΩ
R4
20 Ω
R1
1 kΩ
N
VR1
BZX55B11
11 V, 2%
5
2
D3
1N4007
D4
1N4007
D6
UF4004
D7
R10
3.9 MΩ
UF4007
L1
1 mH
C7
VR2
1N5251B, 22 V
1 µF
50 V
R2
390 Ω
1/8 W
R5
47 Ω
R6
U2
1/8 W
21 kΩ
D
S
PC817A
1%
EN/UV
BP
TinySwitch-PK
U1
R3
2 kΩ
1/8 W
TNY380P
C6
10 µF
50 V
PI-4674-012009
Figure 15. Single 230 VAC Input 20 W Continuous and 45 W Peak Power Supply Using TNY380PN.
9
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Rev. C 09/12
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