TNY274PG データシートの表示（PDF） - Power Integrations, Inc

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TNY274PG

Enhanced/ Energy Efficient/ Low Power Off-line Switcher

Power Integrations, Inc 

TNY274-280

Parameter

Conditions

Symbol

SOURCE = 0 V; TJ = -40 to 125 °C

See Figure 16

Min

Typ

Max Units

(Unless Otherwise Specified)

OUTPUT (cont.)

Auto-Restart

ON-Time at fOSC

Auto-Restart

Duty Cycle

tAR

DCAR

TJ = 25 °C

See Note K

TJ = 25 °C

64

ms

3

%

NOTES:

A. IS1 is an accurate estimate of device controller current consumption at no-load, since operating frequency is so

low under these conditions. Total device consumption at no-load is the sum of IS1 and IDSS2.

B Since the output MOSFET is switching, it is difficult 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.

C. BP/M pin is not intended for sourcing supply current to external circuitry.

D. 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.

Nominal BP/M

Pin Cap Value

0.1 µF

1 µF

10 µF

Tolerance Relative to Nominal

Capacitor Value

Min

MAX

-60%

+100%

-50%

+100%

-50%

NA

E. For current limit at other di/dt values, refer to Figure 23.

F. 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).

G. This parameter is derived from characterization.

H. This parameter is derived from the change in current limit measured at 1X and 4X of the di/dt shown in the ILIMIT

specification.

I. IDSS1 is the worst case OFF state leakage specification at 80% of BVDSS and maximum operating junction

temperature. IDSS2 is a typical specification under worst case application conditions (rectified 265 VAC) for no-load

consumption calculations.

J. Breakdown voltage may be checked against minimum BVDSS specification by ramping the DRAIN pin voltage up

to but not exceeding minimum BVDSS.

K. Auto-restart on time has the same temperature characteristics as the oscillator (inversely proportional to

frequency).

17 E

2/06

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