TNY375-380 POWERINT [Power Integrations, Inc.], TNY375-380 Datasheet - Page 9

• Manufacturer Part Number: TNY375-380
• Description: Energy-Efficient, Off-Line Switcher With Enhanced Peak Power Performance
• Manufacturer: POWERINT [Power Integrations, Inc.]

Key Application considerations
TinySwitch-PK Design Considerations
Output Power Table
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:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
*K
current. A transient K
premature termination of switching cycles due to initial current
limit (I
power capability.
Figure 15. Single 230 VAC Input 20 W Continuous and 45 W Peak Power Supply Using TNY380P.
www.powerint.com
P
185-265
. Below a value of 1, K
The minimum DC input voltage is 100 V or higher for 85 VAC
input, or 220 V or higher for 230 VAC input or 115 VAC with
a voltage doubler. The value of the input capacitance should
be sized to meet these criteria for AC input designs.
Efficiency of 75%.
Minimum data sheet value of I
Transformer primary inductance tolerance of ±10%.
Reflected output voltage (V
Voltage only output of 12 V with an ultrafast PN rectifier
diode
Continuous conduction mode operation with transient K
value of 0.25.
Increased current limit is selected for peak and open frame
power columns and standard current limit for adapter
columns.
The part is board mounted with SOURCE pins soldered to a
sufficient area of copper to keep the SOURCE pin
temperature at or below 110 °C.
Ambient temperature of 50 °C for open frame designs and
40 °C for sealed adapters.
VAC
L
N
INIT
) being exceeded, which reduces maximum output
3.15 A
F1
1N4007
1N4007
D1
D3
P
limit of ≥0.25 is recommended to avoid
1N4007
1N4007
10 F
400 V
P
C1
D2
D4
is the ratio of ripple to peak primary
OR
) of 135 V.
2
f.
1 mH
1 k
22 F
400 V
R1
L1
C2
TinySwitch-PK
TNY380P
3.9 M
3.9 M
P6KE170A
U1
R10
R9
VR3
UF4007
10 F
50 V
P
C6
D7
*
1/2 W
10 nF
22
1 kV
R7
C8
1N5251B, 22 V
The values shown in Table 1 for peak power assume operation
in I
powers for each family member at all three selectable current
limit modes.
For both Table 1 and Table 2, the peak output power values are
limited electronically, based on minimum device I
differently, with sufficient heatsinking, 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.
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
Peak Output Power Table
Table 2.
TNY375PN 8.5 W
TNY376PN
TNY377PN
TNY378PN
TNY379PN
TNY380PN
Product
LIMITPEAKinc
VR2
1
3
21 k
1%
Peak Output Power Capability vs Current Limit Mode Selection.
R6
EFD25
. For reference, Table 2 provides peak output
T1
250 VAC
2.2 nF
PEAKred
10 W
13 W
16 W
18 W
20 W
I
1/8 W
C9
LIMIT-
47
R5
6,7,8
9,10
5
2
230 VAC ± 15%
20
R4
I
14.5 W
27.5 W
31.5 W
LIMITPEAK
19 W
23 W
36 W
UF4004
SB560
D5
D6
PC817A
1000 F
U2
16 V
16.5 W
C3
1 F
50 V
22 W
28 W
34 W
39 W
45 W
C7
PEAKinc
I
LIMIT-
TNY375-380
1/8 W
390
1/8 W
BZX55B11
2 k
1000 F
11 V, 2%
R3
5.5 W
R2
PI-4674-051707
PEAKred
10 W
12 W
14 W
16 V
I
6 W
8 W
C4
LIMIT-
VR1
3.3 H
85-265 VAC
L2
I
11.5 W
21.5 W
LIMITPEAK
15 W
18 W
25 W
28 W
2
f. Stated
220 F
16 V
C5
+12 V
Rev. A 05/07
RTN
12.5 W
17 W
23 W
27 W
31 W
35 W
PEAKinc
I
LIMIT-
9