NCP1076ABP100G Datasheet NCP1075BAP130G, NCP1079BAP130G, NCP1076ABP100G | P7-P9

NCP1075A/B, NCP1076A/B, NCP1077A/B, NCP1079A/B

www.onsemi.com

7

ELECTRICAL CHARACTERISTICS

(For typical values T

J

= 25°C, for min/max values T

J

= −40°C to +125°C, V

CC

= 12 V unless otherwise noted)

Symbol UnitMaxTypMinPinRating

CURRENT COMPARATOR

I

PKSW(65)

Final switch current with a primary slope of 200 mA/ms,

f

SW

= 65 kHz (Note 3)

NCP1075u

NCP1076u

NCP1077u

NCP1079u

−

450

710

860

1100

−

mA

I

PKSW(100)

Final switch current with a primary slope of 200 mA/ms,

f

SW

=100 kHz (Note 3)

NCP1075u

NCP1076u

NCP1077u

NCP1079u

−

440

685

825

1040

−

mA

I

PK(OPP)

Maximum internal current set−point at beginning of switching cycle

FB pin open, BO/AC_OVP pin voltage = 2.65 V, T

J

= 25°C

NCP1075u

NCP1076u

NCP1077u

NCP1079u

−

375

610

750

985

−

mA

t

SS

Soft−start duration (Guaranteed by design) − − 10 − ms

t

prop

Propagation delay from current detection to drain OFF state − − 100 − ns

t

LEB1

Leading Edge Blanking Duration 1 − − 300 − ns

t

LEB2

Leading Edge Blanking Duration 2 − − 100 − ns

INTERNAL OSCILLATOR

f

OSC(65)

Oscillation frequency, 65 kHz version, T

J

= 25°C (Note 4) − 59 65 71 kHz

f

OSC(100)

Oscillation frequency, 100 kHz version, T

J

= 25°C (Note 4) − 90 100 110 kHz

f

jitter

Frequency jittering in percentage of f

OSC

− − ±6 − %

f

swing

Jittering modulation frequency − − 300 − Hz

D

MAX

Maximum duty−cycle − 64 68 72 %

FEEDBACK SECTION

I

FB(fault)

FB current for which Fault is detected 4 (1) − −35 −

mA

I

FB100%

FB current for which internal current set−point is 100% (I

PK(0)

) 4 (1) − −44 −

mA

I

FB(freeze)

FB current for which internal current set-point is I

freeze

4 (1) − −90 −

mA

V

FB(REF)

Equivalent pull−up voltage in linear regulation range

(Guaranteed by design)

4 (1) − 3.3 − V

R

FB(UP)

Equivalent feedback resistor in linear regulation range

(Guaranteed by design)

4 (1) − 19.5 −

kΩ

FREQUENCY FOLDBACK & SKIP

I

FBfold

Start of frequency foldback FB pin current level 4 (1) − −68 −

mA

I

FBfold(END)

End of frequency foldback FB pin current level, f

SW

= f

MIN

4 (1) − −100 −

mA

f

MIN

The frequency below which skip−cycle occurs, T

J

= 25°C (Note 4) − 23 27 31 kHz

I

FB(skip)

The FB pin current level to enter skip mode 4 (1) − −120 −

mA

I

freeze

Internal minimum current set−point (I

FB

= I

FB(freeze)

)

NCP1075u

NCP1076u

NCP1077u

NCP1079u

−

165

270

330

430

−

mA

3. The final switch current is: I

PK(0)

/ (V

in

/L

P

+ S

a

) x V

in

/L

P

+ V

in

/L

P

x t

prop

, with S

a

the built−in slope compensation, V

in

the input voltage, L

P

the primary inductor in a flyback, and t

prop

the propagation delay.

4. Oscillator frequency is measured with disabled jittering.

NCP1075A/B, NCP1076A/B, NCP1077A/B, NCP1079A/B

www.onsemi.com

8

ELECTRICAL CHARACTERISTICS

(For typical values T

J

= 25°C, for min/max values T

J

= −40°C to +125°C, V

CC

= 12 V unless otherwise noted)

Symbol UnitMaxTypMinPinRating

SLOPE COMPENSATION

S

a(65)

The internal slope compensation @ 65 kHz:

NCP1075u

NCP1076u

NCP1077u

NCP1079u

−

9

15

18

23

−

mA/ms

S

a(100)

The internal slope compensation @ 100 kHz:

NCP1075u

NCP1076u

NCP1077u

NCP1079u

−

14

23

28

36

−

mA/ms

PROTECTIONS

t

SCP

Fault validation further to error flag assertion − 35 48 − ms

t

recovery

OFF phase in fault mode − − 420 − ms

V

OVP

V

CC

voltage at which the switcher stops pulsing 1 (5) 17.0 18.0 18.8 V

t

OVP

The filter of V

CC

OVP comparator − − 80 −

ms

V

BO(EN)

Brown−out level detection 2 (8) − 50 − mV

V

BO(ON)

Brown−out level, the switcher starts pulsing, OPP starts to decrease I

PK

2 (8) 0.72 0.80 0.88 V

V

BO(HYST)

Brown−out hysteresis (Guaranteed by design) 2 (8) − 100 − mV

V

ACOVP(ON)

OVP level when the switcher stops pulsing 2 (8) 2.6 2.9 3.2 V

V

ACOVP(OFF)

OVP level when the switcher starts pulsing 2 (8) 2.3 2.6 2.9 V

t

BOfilter

V

BO

filter − − 20 −

ms

t

BO

Brown−out timer − − 50 − ms

V

HV(EN)

The drain pin voltage above which the MOSFET operates. Checked after one

of the following events: TSD, UVLO, SCP, or V

CC

OVP mode, BO/AC_OVP

pin = 0 V

5 (4) 72 91 110 V

I

PK(150)

High current protection, percent of max limit I

PK

(Guaranteed by design) − − 150 − %

TEMPERATURE MANAGEMENT

TSD

Temperature shutdown (Guaranteed by design) − 150 − − °C

TSD

HYST

Hysteresis in shutdown (Guaranteed by design) − − 20 − °C

3. The final switch current is: I

PK(0)

/ (V

in

/L

P

+ S

a

) x V

in

/L

P

+ V

in

/L

P

x t

prop

, with S

a

the built−in slope compensation, V

in

the input voltage, L

P

the primary inductor in a flyback, and t

prop

the propagation delay.

4. Oscillator frequency is measured with disabled jittering.

Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product

performance may not be indicated by the Electrical Characteristics if operated under different conditions.

NCP1075A/B, NCP1076A/B, NCP1077A/B, NCP1079A/B

www.onsemi.com

9

TYPICAL CHARACTERISTICS

Figure 5. V

CC(on)

vs. Temperature Figure 6. V

CC(min)

vs. Temperature

TEMPERATURE (°C) TEMPERATURE (°C)

806040 100200−20−40

8.25

8.30

8.35

8.40

8.45

8.50

100806040200−20−40

6.80

6.82

6.84

6.86

6.88

6.90

6.92

6.98

Figure 7. V

CC(off)

vs. Temperature Figure 8. I

DSS(off)

vs. Temperature

TEMPERATURE (°C) TEMPERATURE (°C)

806040 120200−20−40

6.42

6.45

6.48

6.46

6.47

6.49

8060 12040200−20−40

30

50

60

80

110

120

130

Figure 9. I

CC1(1075u)

vs. Temperature Figure 10. I

CC1(1076u/77u)

vs. Temperature

TEMPERATURE (°C) TEMPERATURE (°C)

806040 100200−20−40

1.00

1.02

1.08

1.06

80 1006040200−20−40

1.18

1.20

1.22

1.24

V

CC(on)

(V)

V

CC(min)

(V)

V

CC(off)

(V)

I

DSS(off)

(mA)

I

CC1(1075u)

(mA)

I

CC1(1076u/77u)

(mA)

120 120

100 100

90

120 120

6.78

6.94

6.96

6.43

6.44

100

70

40

1.04

1.10

1.12

1.14

1.16

1.26

1.28

1.19

1.21

1.23

1.25

1.27

NCP1076ABP100G

NCP1076ABP100G

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