NCP3020A Ver la hoja de datos (PDF) - ON Semiconductor

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componentes Descripción

Fabricante

NCP3020A

Synchronous PWM Controller

ON Semiconductor 

NCP3020A, NCP3020B, NCV3020A, NCV3020B

ELECTRICAL CHARACTERISTICS (−40°C < TJ < +125°C, VCC = 12 V, for min/max values unless otherwise noted)

Characteristic

Conditions

Min

Typ

Max

Unit

Input Voltage Range

−

4.7

28

V

SUPPLY CURRENT

VCC Supply Current

NCP3020A

VCC Supply Current

NCP3020B

VFB = 0.55 V, Switching, VCC = 4.7 V

VFB = 0.55 V, Switching, VCC = 28 V

VFB = 0.55 V, Switching, VCC = 4.7 V

VFB = 0.55 V, Switching, VCC = 28 V

−

5.5

8.0

mA

−

7.0

11

mA

−

5.9

10

mA

−

7.8

13

mA

UNDER VOLTAGE LOCKOUT

UVLO Rising Threshold

UVLO Falling Threshold

VCC Rising Edge

VCC Falling Edge

4.0

4.3

4.7

V

3.5

3.9

4.3

V

OSCILLATOR

Oscillator Frequency NCP3020A

TJ = +25°C, 4.7 V v VCC v 28 V

250

300

350

kHz

TJ = −40°C to +125°C, 4.7 V v VCC v 28 V

240

300

360

kHz

Oscillator Frequency NCP3020B

TJ = +25°C, 4.7 V v VCC v 28 V

550

600

650

kHz

TJ = −40°C to +125°C, 4.7 V v VCC v 28 V

530

600

670

kHz

Ramp−Amplitude Voltage

Vpeak − Valley (Note 4)

−

1.5

−

V

Ramp Valley Voltage

0.46

0.70

0.88

V

PWM

Minimum Duty Cycle

Maximum Duty Cycle

NCP3020A

NCP3020B

(Note 4)

−

7.0

−

%

80

84

−

%

75

80

−

Soft Start Ramp Time NCP3020A

NCP3020B

VFB = VCOMP

−

6.8

−

ms

−

4.4

−

ERROR AMPLIFIER (GM)

Transconductance

Open Loop dc Gain

Output Source Current

Output Sink Current

FB Input Bias Current

Feedback Voltage

COMP High Voltage

COMP Low Voltage

OUTPUT VOLTAGE FAULTS

Feedback OOV Threshold

Feedback OUV Threshold

0.9

1.4

1.9

mS

(Notes 4 and 6)

−

70

−

dB

VFB = 545 mV

VFB = 655 mV

45

75

100

mA

45

75

100

mA

−

0.5

500

nA

TJ = 25°C

0.591

0.6

0.609

V

4.7 V < VCC < VIN < 28 V, −40°C < TJ < +125°C 0.588

0.6

0.612

V

VFB = 0.55 V

VFB = 0.65 V

4.0

4.4

5.0

V

−

72

250

mV

0.66

0.75

0.84

V

0.42

0.45

0.48

V

OVERCURRENT

ISET Source Current

7.0

13

18

mA

Current Limit Set Voltage (Note 5)

TJ = 25°C, RSET = 22.5 kW

140

240

360

mV

4. Guaranteed by design.

5. The voltage sensed across the high side MOSFET during conduction.

6. This assumes 100 pF capacitance to ground on the COMP Pin and a typical internal Ro of > 10 MW.

7. This is not a protection feature.

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