NCP1216A datasheet(5/18 Pages) ONSEMI

Part #	NCP1216A

Description	PWM Current-Mode Controller for High-Power Universal Off-Line Supplies

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NCP1216, NCP1216A

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5

ELECTRICAL CHARACTERISTICS (continued) (For typical values TJ = 25°C, for min/max values TJ = 0°C to +125°C, Maximum

TJ = 150°C, VCC = 11 V unless otherwise noted.)

Characteristic

Symbol

Min

Typ

Max

Unit

INTERNAL OSCILLATOR (VCC = 11 V, Pin 5 Loaded by 1.0 kW)

Oscillation Frequency, 65 kHz Version

fOSC

58.5

65

71.5

kHz

Oscillation Frequency, 100 kHz Version

fOSC

90

100

110

kHz

Oscillation Frequency, 133 kHz Version

fOSC

120

133

146

kHz

Built−in Frequency Jittering in Percentage of fOSC

fjitter

±4.0

%

Maximum Duty−Cycle

NCP1216

NCP1216A

Dmax

69

42

75

46.5

81

50

%

FEEDBACK SECTION (VCC = 11 V, Pin 5 Loaded by 1.0 kW)

Internal Pullup Resistor

2

Rup

20

k

W

Pin 2 (FB) to Internal Current Setpoint Division Ratio

−

Iratio

3.3

SKIP CYCLE GENERATION

Default Skip Mode Level

1

Vskip

0.9

1.1

1.26

V

Pin 1 Internal Output Impedance

1

Zout

25

k

W

INTERNAL RAMP COMPENSATION

Internal Ramp Level @ 25

°C (Note 4)

3

Vramp

2.6

2.9

3.2

V

Internal Ramp Resistance to CS Pin

3

Rramp

19

k

W

4. A 1.0 M

W resistor is connected to the ground for the measurement.

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