NCP1246BD065R2G 查看數據表（PDF） - ON Semiconductor

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NCP1246BD065R2G

Fixed Frequency Current Mode Controller for Flyback Converters

ON Semiconductor 

NCP1246

ELECTRICAL CHARACTERISTICS (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

Test Condition

Symbol

Min

Typ

Max

FEEDBACK

Internal pull−up voltage on the FB pin

(Note 6)

VFB(ref)

4.5

5

5.5

Feedback voltage below which the peak

current is frozen

VFB(freeze)

1.35

1.5

1.65

SKIP CYCLE MODE

Feedback voltage thresholds for skip mode

REMOTE CONTROL ON FB PIN

VFB going down

VFB going up

Vskip(in)

Vskip(out)

0.63 0.70 0.77

0.72 0.80 0.88

The voltage above which the part enters the

on mode

VCC > VCC(off), VHV = 60 V

VON

−

2.2

−

The voltage below which the part enters the

off mode

VCC > VCC(off)

VOFF

0.35 0.40 0.45

Minimum hysteresis between the VON and

VOFF

Pull−up current in off mode

Go To Off mode timer

OVERLOAD PROTECTION

VCC > VCC(off), VHV = 60 V

VCC > VCC(off)

VCC > VCC(off)

VHYST

IOFF

tGTOM

500

−

−

−

5

−

100

150

300

Fault timer duration

Autorecovery mode latch−off time duration

OVERPOWER PROTECTION

tfault

tautorec

108

128

178

0.85 1.00 1.35

VHV to IOPC conversion ratio

Current flowing out of CS pin (Note 7)

FB voltage above which IOPC is applied

FB voltage below which is no IOPC applied

LATCH−OFF INPUT

VHV = 125 V

VHV = 162 V

VHV = 325 V

VHV = 365 V

VHV = 365 V

VHV = 365 V

KOPC

IOPC(125)

IOPC(162)

IOPC(325)

IOPC(365)

VFB(OPCF)

VFB(OPCE)

−

−

−

−

105

2.12

−

0.54

0

20

110

130

2.35

2.15

−

−

−

−

150

2.58

−

High threshold

Low threshold

Current source for direct NTC connection

During normal operation

During soft−start

Blanking duration on high latch detection

VLatch going up

VLatch going down

VLatch = 0 V

65 kHz version

100 kHz version

VOVP

VOTP

2.35

2.5

2.65

0.76

0.8

0.84

INTC

65

95

105

INTC(SSTART)

130

190

210

tLatch(OVP)

35

50

70

20

35

50

Blanking duration on low latch detection

Clamping voltage

TEMPERATURE SHUTDOWN

ILatch = 0 mA

ILatch = 1 mA

tLatch(OTP)

−

350

−

Vclamp0(Latch)

1.0

1.2

1.4

Vclamp1(Latch)

1.8

2.4

3.0

Temperature shutdown

TJ going up

TTSD

−

150

−

Temperature shutdown hysteresis

TJ going down

TTSD(HYS)

−

30

−

5. Internal supply current only, currents sourced via FB pin is not included (current is flowing in GND pin only).

6. Guaranteed by design.

7. CS pin source current is a sum of Ibias and IOPC, thus at VHV = 125 V is observed the Ibias only, because IOPC is switched off.

Unit

V

V

V

V

V

mV

mA

ms

ms

s

mA / V

mA

V

V

V

V

mA

ms

ms

V

°C

°C

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