NCP1337

http://onsemi.com

6

Characteristic

Pin

Symbol

Min

Typ

Max

Unit

FEEDBACK SECTION

FB Current under which FAULT is Detected

2

−

40

−

mA

FB Current for which Internal Setpoint is 100%

2

−

50

−

mA

FB Current above which DRV Pulses are Stopped

2

−

220

−

mA

FB Current under which DRV Pulses are Reauthorized after having

2

−

205

−

mA

FB Current above which FB Pin Voltage is not Regulated anymore

2

−

500

−

mA

2

2.8

3.0

3.2

V

Duration before Entering Protection Mode after FAULT Detection

−

−

80

−

ms

−

−

4.0

−

ms

−

−

300

−

ms

BROWN−OUT AND LATCH SECTION

Brown−Out Detection Level

1

460

500

540

mV

Current Flowing out of Pin 1 when Brown−Out Comparator has Toggled

1

−

10

−

mA

Vpin1 Threshold that Disables the Output

1

2.8

3.0

3.3

V

Vpin1 Threshold that Activates the Permanent Latch

1

4.75

5.0

5.25

V

DEMAGNETIZATION DETECTION BLOCK

Current Threshold for Demagnetization Detection

5

−

210

−

mA

(when Sinking 15 mA)

5

−

−

1.5

V

(when Sourcing 15 mA)

5

−0.6

−

−

V

Propagation Delay from Demag Detection to Gate ON State

5

−

180

220

ns

Blanking Window after Gate OFF State before Detecting

Demagnetization

5

−

5.5

−

ms

Timeout on Demag Signal

5

−

8.0

−

ms

Maximum OFF Time

5

−

35

42

ms

Minimum Switching Period

5

MinPeriod

6.8

7.7

8.5

ms