TNY379GN Power Integrations, TNY379GN Datasheet - Page 9

• Manufacturer Part Number: TNY379GN
• Description: IC OFFLINE SWIT UVLO 8SMD
• Manufacturer: Power Integrations
• Series: TinySwitch®-PKr
• Type: Off Line Switcherr

Specifications of TNY379GN

• Output Isolation: Isolated
• Frequency Range: 132 ~ 280kHz
• Voltage - Output: 700V
• Power (watts): 39W
• Operating Temperature: -40°C ~ 150°C
• Package / Case: 8-SMD Gull Wing, 7 Leads
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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 TNY380PN.
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.
Effi ciency of 75%.
Minimum data sheet value of I
Transformer primary inductance tolerance of ±10%.
Refl ected output voltage (V
Voltage only output of 12 V with an ultrafast PN rectifi er 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
suffi cient area of copper and/or a heatsink 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.
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
P
400 V
10 F
C1
is the ratio of ripple to peak primary
D2
D4
OR
) of 135 V.
2
f.
1 mH
1 k
400 V
22 F
R1
L1
C2
TinySwitch-PK
TNY380P
3.9 M
3.9 M
U1
P6KE170A
R10
R9
VR3
UF4007
10 F
P
50 V
C6
*
D7
1/2 W
10 nF
22
1 kV
R7
C8
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 suffi cient heatsinking, these values could be
delivered indefi nitely, 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 fi lter, the BYPASS pin capacitor forms an external fi lter,
providing noise immunity from inadvertent triggering. For the
bypass capacitor to be effective as a high frequency fi lter, it
1N5251B, 22 V
Peak Output Power Table
Table 2.
TNY375P/G/D
TNY376P/G/D
TNY377P/G
TNY378P/G
TNY379P/G
TNY380P/G
LIMITPEAKinc
VR2
Product
1
3
21 k
Peak Output Power Capability vs Current Limit Mode Selection.
1%
R6
EFD25
. For reference, Table 2 provides peak output
T1
250 VAC
2.2 nF
1/8 W
C9
47
R5
6,7,8
9,10
5
2
8.5 W
PEAKred
10 W
13 W
16 W
18 W
20 W
I
LIMIT-
20
R4
230 VAC ± 15%
UF4004
SB560
D5
D6
I
14.5 W 16.5 W
27.5 W
31.5 W
LIMITPEAK
19 W
23 W
36 W
PC817A
1000 F
U2
16 V
C3
1 F
50 V
C7
TNY375-380
PEAKinc
22 W
28 W
34 W
39 W
45 W
I
LIMIT-
1/8 W
390
1/8 W
BZX55B11
2 k
1000 F
11 V, 2%
R3
R2
PI-4674-012009
16 V
C4
VR1
5.5 W
PEAKred
10 W
12 W
14 W
I
6 W
8 W
LIMIT-
3.3 H
L2
2
85-265 VAC
f. Stated
220 F
I
11.5 W 12.5 W
21.5 W
16 V
LIMITPEAK
C5
15 W
18 W
25 W
28 W
Rev. C 07/09
+12 V
RTN
9
17 W
23 W
27 W
31 W
35 W
PEAKinc
I
LIMIT-