MC44608P40 datasheet(4/15 Pages) ONSEMI

Teilenummer	MC44608P40

Bauteilbeschribung	Few External Components Reliable and Flexible SMPS Controller

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MC44608

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ELECTRICAL CHARACTERISTICS (VCC = 12 V, for typical values TA = 25°C, for min/max values TA = −25°C to +85°C unless

otherwise noted) (Note 2)

Characteristic

Symbol

Min

Typ

Max

Unit

DEMAGNETIZATION DETECTION section (note 3)

Demag Comparator Threshold (Vpin1 increasing)

Vdmg−th

30

50

69

mV

Demag Comparator Hysteresis (Note 4)

Hdmg

−

30

−

mV

Propagation Delay (Input to Output, Low to High)

tPHL(In/Out)

−

300

−

ns

Input Bias Current (Vdemag = 50 mV)

Idem−lb

−0.6

−

mA

Negative Clamp Level (Idemag = −1.0 mA)

Vcl−neg−dem

−0.9

−0.7

−0.4

V

Positive Clamp Level @ Idemag = 125 mA

Vcl−pos−dem−H

2.05

2.3

2.8

V

Positive Clamp Level @ Idemag = 25 mA

Vcl−pos−dem−L

1.4

1.7

1.9

V

OVERTEMPERATURE section

Trip Level Over Temperature

Thigh

−

160

−

°C

Hysteresis

Thyst

−

30

−

°C

STANDBY MAXIMUM CURRENT REDUCTION section

Normal Mode Recovery Demag Pin Current Threshold

Idem−NM

20

25

30

mA

K FACTORS SECTION FOR PULSED MODE OPERATION

ICCS / Istup

MC44608P40

10 x K1

2.4

2.9

3.8

−

ICCS / Istup

MC44608P75

10 x K1

2.8

3.3

4.2

−

ICCL / Istup

103 x K2

46

52

63

−

(Vstup − UVLO2) / (Vstup − UVLO1)

102 x Ksstup

1.8

2.2

2.6

−

(UVLO1 − UVLO2) / (Vstup − UVLO1)

102 x Ksl

90

120

150

−

ICS / Vcsth

106 x Ycstby

175

198

225

−

Demag ratio Iovp / Idem NM

Dmgr

3.0

4.7

5.5

−

(V3 1.0 mA − V3 0.5 mA) / (1.0 mA − 0.5 mA)

R3

−

1800

−

W

Vcontrol Latchoff

V3

−

4.8

−

V

SUPPLY SECTION

Minimum Startup Voltage

Vilow

−

50

V

VCC Startup Voltage

Vstup−th

12.5

13.1

13.8

V

Output Disabling VCC Voltage After Turn On

Vuvlo1

9.5

10

10.5

V

Hysteresis (Vstup−th − Vuvlo1)

Hstup−uvlo1

−

3.1

−

V

VCC Undervoltage Lockout Voltage

Vuvlo2

6.2

6.6

7.0

V

Hysteresis (Vuvlo1 − Vuvlo2)

Huvlo1−uvlo2

−

3.4

−

V

Absolute Normal Condition VCC Start Current @ (Vi = 100 V) and

(VCC = 9.0 V)

−(ICC)

7.0

9.5

12.8

mA

Switching Phase Supply Current (no load)

MC44608P40

MC44608P75

ICCS

2.0

2.4

2.6

3.2

3.6

4.0

mA

Latched Off Phase Supply Current

ICC−latch

0.3

0.5

0.68

mA

Hiccup Mode Duty Cycle (no load)

dHiccup

−

10

−

%

2. Adjust VCC above the startup threshold before setting to 12 V. Low duty cycle pulse techniques are used during test to maintain junction

temperature as close to ambient as possible.

3. This function can be inhibited by connecting pin 1 to GND.

4. Guaranteed by design (non tested).

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