NCP1075STAT3G datasheet(6/26 Pages) ONSEMI

Part #	NCP1075STAT3G

Description	High-Voltage Switcher for Low Power Offline SMPS

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Manufacturer	ONSEMI [ON Semiconductor]

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NCP1072, NCP1075

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ELECTRICAL CHARACTERISTICS

(For typical values TJ = 25°C, for min/max values TJ = −40°C to +125°C, VCC = 8 V unless otherwise noted)

Symbol

Unit

Max

Typ

Min

Rating

FREQUENCY FOLDBACK & SKIP

IFBfold

Start of frequency foldback feedback level

4

−68

mA

IFBfold(end) End of frequency foldback feedback level, Fsw = Fmin

4

−100

mA

Fmin

The frequency below which skip−cycle occurs

−

21

25

29

kHz

IFBskip

The feedback level to enter skip mode

4

−120

mA

Ifreeze

Internal minimum current setpoint (IFB = −90 mA) in NCP1072

88

mA

Ifreeze

Internal minimum current setpoint (IFB = −90 mA) in NCP1075

168

mA

RAMP COMPENSATION

Sa(65)

The internal ramp compensation in NCP1072 (65 kHz version)

−

4.2

kA/s

Sa(65)

The internal ramp compensation in NCP1075 (65 kHz version)

−

7.5

kA/s

Sa(100)

The internal ramp compensation in NCP1072 (100 kHz version)

−

6.5

kA/s

Sa(100)

The internal ramp compensation in NCP1075 (100 kHz version)

−

11.5

kA/s

Sa(130)

The internal ramp compensation in NCP1072 (130 kHz version) (Note 4)

−

8.4

kA/s

Sa(130)

The internal ramp compensation in NCP1075 (130 kHz version)

−

15

kA/s

PROTECTIONS

tSCP

Fault validation further to error flag assertion

−

40

53

ms

trecovery

OFF phase in fault mode

−

420

ms

IOVP

VCC clamp current at which the switcher stops pulsing

1

6.0

8.5

11

mA

tOVP

The filter of VCC OVP comparator

−

80

ms

VHV(EN)

The drain pin voltage above which allows MOSFET operate, which is

detected after TSD, UVLO, SCP, or VCC OVP mode.

5

72

91

110

V

TEMPERATURE MANAGEMENT

TSD

Temperature shutdown (Guaranteed by design)

−

150

°C

Hysteresis in shutdown (Guaranteed by design)

−

50

°C

3. The final switch current is: IIPK(0) / (Vin/LP + Sa) x Vin/LP + Vin/LP x tprop, with Sa the built−in slope compensation, Vin the input voltage, LP

the primary inductor in a flyback, and tprop the propagation delay..

4. NCP1072 130 kHz on demand only.

5. Oscillator frequency is measured with disabled jittering.

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