NCP1396A, NCP1396B

http://onsemi.com

6

ELECTRICAL CHARACTERISTICS

TIMERS

Characteristic

Pin

Symbol

Min

Typ

Max

Unit

Timer charge current

3

Itimer

--

160

--

mA

Timer duration with a 1 mF capacitor anda1MΩ resistor

3

T--timer

--

25

--

ms

Timer recurrence in permanent fault, same values as above

3

T--timerR

--

1.4

--

s

Voltage at which pin 3 stops output pulses

3

VtimerON

3.5

4

4.4

V

Voltage at which pin 3 re--starts output pulses

3

VtimerOFF

0.9

1

1.1

V

Soft--start ending voltage

1

VSS

--

2

--

V

Soft--start charge current

1

ISS

80

75

110

110

125

130

mA

Soft--start duration with a 100 nF capacitor (Note 3)

1

T--SS

--

1.8

--

ms

PROTECTION

Characteristic

Pin

Symbol

Min

Typ

Max

Unit

Reference voltage for fast input (Note 4)

8--9

VrefFaultF

1.00

1.05

1.10

V

Hysteresis for fast input (Note 4)

8--9

HysteFaultF

--

80

--

mV

Reference voltage for slow input

8--9

VrefFaultS

0.95

0.92

1.00

1.00

1.05

1.05

V

Hysteresis for slow input

8--9

HysteFaultS

--

60

--

mV

Propagation delay for fast fault input drive shutdown

8

TpFault

--

55

90

ns

Brown--Out input bias current

5

IBObias

--

0.02

--

mA

Brown--Out level (Note 4)

5

VBO

0.99

1.04

1.09

V

Hysteresis current, Vpin5 > VBO – A version

5

IBO_A

21.5

19

26.5

26.5

31.5

33

mA

Hysteresis current, Vpin5 > VBO – B version

5

IBO_B

86

80

106

106

126

132

mA

Latching voltage

5

Vlatch

3.6

4

4.4

V

Temperature shutdown

--

TSD

140

--

--

C

Hysteresis

--

TSDhyste

--

30

--

C

3. The A version does not activate soft--start (unless the feedback pin voltage is below 0.6 V) when the fast--fault is released, this is for skip cycle

implementation. The B version does activate the soft--start upon release of the fast--fault input for any feedback conditions.

4. Guaranteed by design