NCP1239CD65R2G datasheet(7/25 Pages) ONSEMI

Part #	NCP1239CD65R2G

Description	Fixed Frequency Current?륪ode Controller for Flyback Converter

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Manufacturer	ONSEMI [ON Semiconductor]

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NCP1239

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Table 4. 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)

Parameter

Unit

Max

Typ

Min

Symbol

Test Conditions

FAULT INPUT (OTP/OVP)

Over-Voltage Protection Threshold

VFAULT Increasing

VFAULT(OVP)

2.8

3.0

3.2

V

Over-Temperature Protection Threshold

VFAULT Decreasing

VFAULT(OTP)

0.37

0.40

0.43

V

NTC Biasing Current

VFAULT = 0 V

IOTP

39

45

51

mA

Additional NTC Biasing Current during

Soft-Start Only

VFAULT = 0 V − During

Soft-Start Only

IOTP_boost

38

44

50

mA

Latch Clamping Voltage

IFAULT = 0 mA

VFAULT(clamp)0

1.1

1.35

1.6

V

Latch Clamping Voltage

IFAULT = 1 mA

VFAULT(clamp)1

2.2

2.7

3.2

V

Blanking Time after Drive Turn Off

tLATCH(blank)

−

1

−

ms

Number of Clock Cycles before Latch

Confirmation

tLATCH(count)

−

4

−

OVER-CURRENT PROTECTION (OCP)

Internal OCP Timer Duration

tOCP

51

64

77

ms

Auto-Recovery Timer

tAUTOREC

0.85

1

1.35

s

VCC OVER-VOLTAGE (VCC OVP)

Latched Over Voltage Protection on VCC Pin

VCC(OVP)

24.0

25.5

27.0

V

Delay before OVP on VCC Confirmation

tOVP(delay)

−

20

−

ms

THERMAL SHUTDOWN (TSD)

Temperature Shutdown

TJ Increasing (Note 1)

TSHDN

135

150

165

°C

Temperature Shutdown Hysteresis

TJ Decreasing (Note 1)

TSHDN(hys)

−

20

−

°C

Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product

performance may not be indicated by the Electrical Characteristics if operated under different conditions.

1. Guaranteed by design

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

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