TNY278GN Power Integrations, TNY278GN Datasheet - Page 17

IC OFFLINE SWIT OVP OTP HV 8SMD

TNY278GN

Manufacturer Part Number
TNY278GN
Description
IC OFFLINE SWIT OVP OTP HV 8SMD
Manufacturer
Power Integrations
Series
TinySwitch®-IIIr
Datasheet

Specifications of TNY278GN

Output Isolation
Isolated
Frequency Range
124 ~ 140kHz
Voltage - Output
700V
Power (watts)
28W
Operating Temperature
-40°C ~ 150°C
Package / Case
8-SMD Gull Wing, 7 Leads
Output Voltage
12 V
Input / Supply Voltage (max)
265 VAC
Input / Supply Voltage (min)
85 VAC
Duty Cycle (max)
65 %
Switching Frequency
132 KHz
Supply Current
445 uA
Operating Temperature Range
- 40 C to + 150 C
Mounting Style
SMD/SMT
No. Of Outputs
1
Voltage Regulator Case Style
SMD
No. Of Pins
8
Base Number
278
Controller Type
PWM
Frequency
132kHz
Rohs Compliant
Yes
For Use With
596-1194 - KIT DESIGN REF TINYSWITCH-III
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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NOTES:
A.
B.
C.
D.
E.
F.
G.
H.
I.
J.
K.
www.powerint.com
Nominal BP/M
Pin Cap Value
I
conditions. Total device consumption at no-load is the sum of I
Since the output MOSFET is switching, it is diffi cult to isolate the switching current from the supply current at the DRAIN. An
alternative is to measure the BP/M pin current at 6.1 V.
BP/M pin is not intended for sourcing supply current to external circuitry.
To ensure correct current limit it is recommended that nominal 0.1 μF / 1 μF / 10 μF capacitors are used. In addition, the BP/M
capacitor value tolerance should be equal or better than indicated below across the ambient temperature range of the target
application. The minimum and maximum capacitor values are guaranteed by characterization.
For current limit at other di/dt values, refer to Figure 23.
TNY274 does not set an increased current limit value, but with a 10 μF BP/M pin capacitor the current limit is the same as with a
1 μF BP/M pin capacitor (reduced current limit value).
This parameter is derived from characterization.
This parameter is derived from the change in current limit measured at 1X and 4X of the di/dt shown in the I
I
typical specifi cation under worst case application conditions (rectifi ed 265 VAC) for no-load consumption calculations.
Breakdown voltage may be checked against minimum BV
exceeding minimum BV
Auto-restart on time has the same temperature characteristics as the oscillator (inversely proportional to frequency).
S1
DSS1
0.1 μF
10 μF
1 μF
is an accurate estimate of device controller current consumption at no-load, since operating frequency is so low under these
is the worst case OFF state leakage specifi cation at 80% of BV
Tolerance Relative to Nominal
-60%
-50%
-50%
Min
DSS
.
Capacitor Value
+100%
+100%
Max
NA
DSS
specifi cation by ramping the DRAIN pin voltage up to but not
S1
and I
DSS
DSS2
and maximum operating junction temperature. I
.
TNY274-280
LIMIT
specifi cation.
DSS2
Rev. I 01/09
is a
17