NCP1236DD65R2G datasheet(7/34 Pages) ONSEMI

Part #	NCP1236DD65R2G

Description	Fixed Frequency Current Mode Controller

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Manufacturer	ONSEMI [ON Semiconductor]

Direct Link	http://www.onsemi.com

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NCP1236

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7

ELECTRICAL CHARACTERISTICS (continued)

(For typical values TJ = 25°C, for min/max values TJ = −40°C to +125°C, VHV = 125 V, VCC = 11 V unless otherwise noted)

Characteristics

Unit

Max

Typ

Min

Symbol

Test Condition

FREQUENCY FOLDBACK

Feedback voltage threshold

below which frequency foldback

starts

VFB(foldS)

1.8

2.0

2.2

V

Feedback voltage threshold

below which frequency foldback

is complete

VFB(foldE)

1.22

1.35

1.48

V

Minimum switching frequency

VFB = Vskip(in) + 0.2

fOSC(min)

22

27

32

kHz

SKIP−CYCLE MODE

Feedback voltage thresholds for

skip mode

VFB going down

VFB going up

Vskip(in)

Vskip(out)

0.63

0.72

0.7

0.80

0.77

0.88

V

LATCH−OFF INPUT

High threshold

VLatch going up

VOVP

2.35

2.5

2.65

V

Low threshold

VLatch going down

VOTP

0.76

0.8

0.84

V

Current source for direct NTC

connection

During normal operation

During soft−start

VLatch = 0 V

INTC

INTC(SSTART)

65

130

95

190

105

210

mA

Blanking duration on high latch

detection

65 kHz version

100 kHz version

tLatch(OVP)

35

25

50

35

70

45

ms

Blanking duration on low latch

detection

tLatch(OTP)

−

350

−

ms

Clamping voltage

ILatch = 0 mA

ILatch = 1 mA

Vclamp0(Latch)

Vclamp1(Latch)

1.0

2.0

1.2

2.4

1.4

3.0

V

TEMPERATURE SHUTDOWN

Temperature shutdown (Note 7)

TJ going up

TTSD

135

150

165

°C

Temperature shutdown

hysteresis (Note 7)

TJ going down

TTSD(HYS)

20

30

40

°C

6. Internal supply current only, current in FB pin not included (current flowing in GND pin only).

7. Guaranteed by design.

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