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NCP1239

Fixed Frequency Current‐Mode Controller for Flyback Converter

ON Semiconductor 

NCP1239

Table 3. MAXIMUM RATINGS

Rating

Symbol

Value

Unit

Power Supply Voltage, VCC Pin, Continuous Voltage

Maximum Voltage on Low Power Pins CS, FB and Fault

VCC

−0.3 to 35

V

−0.3 to 5.5

V

Maximum Voltage on DRV Pin

High Voltage Pin

VDRV

−0.3 to 20

V

HV

−0.3 to 650

V

Thermal Resistance Junction-to-Air

Single Layer PCB 25 mm@, 2 Oz Cu Printed Circuit Copper Clad

RθJ−A

250

°C/W

Maximum Junction Temperature

Storage Temperature Range

TJ(max)

150

°C

TSTG

−60 to 150

°C

ESD Capability (Note 2)

Human Body Model – All Pins Except HV

Machine Model

Charged-Device Model ESD Capability per JEDEC JESD22−C101E

ESDHBM

4

kV

ESDMM

200

V

1

kV

Moisture Sensitivity Level

MSL

1

Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality

should not be assumed, damage may occur and reliability may be affected.

1. Refer to ELECTRICAL CHARACTERISTICS, RECOMMENDED OPERATING RANGES and/or APPLICATION INFORMATION for Safe

Operating parameters.

2. This device series incorporates ESD protection and is tested by the following methods:

ESD Human Body Model tested per JEDEC JESD22−A114F

ESD Machine Model tested per JEDEC JESD22−A115C

Charged-Device Model ESD Capability tested per JEDEC JESD22−C101E

Latch-up Current Maximum Rating: ≤ 150 mA per JEDEC standard: JESD78

Table 4. 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)

Parameter

Test Conditions

Symbol

Min

Typ

Max Unit

START-UP SECTION

Minimum Voltage for Current Source Operation IHV = 90% ISTART2,

VCC = VCC(on) − 0.5 V

Current Flowing Out of VCC Pin

VCC = 0 V

Current Flowing Out of VCC Pin

VCC = VCC(on) – 0.5 V

HV Pin Leakage Current

VHV = 325 V

SUPPLY SECTION

VHV(min)

ISTART1

ISTART2

ILEAK1

−

25

60

V

0.2

0.5

0.8

mA

1.5

3

4.5

mA

−

8

20

mA

Start-Up Threshold

HV Current Source Stop Threshold

VCC Increasing

VCC(on)

11.0 12.0 13.0

V

HV Current Source Restart Threshold

VCC Decreasing

VCC(min)

9.0

10.0

11.0

V

Minimum Operating Voltage

VCC Decreasing

VCC(off)

8.0

8.8

9.4

V

Operating Hysteresis

VCC(on) = VCC(off)

VCC(hys)

3.0

−

−

V

VCC Level for ISTART1 to ISTART2 Transition

VCC(inhibit)

0.7

1.2

1.7

V

VCC Level where Logic Functions are Reset VCC Decreasing

VCC(reset)

6.5

7

7.5

V

Internal IC Consumption

VFB = 3.2 V, FSW = 65 kHz

and CL = 0

ICC1

−

1.4

2.2

mA

Internal IC Consumption

VFB = 3.2 V, FSW = 65 kHz

and CL = 1 nF

ICC2

−

2.1

3.0

mA

Internal IC Consumption

VFB = 3.2 V, FSW = 100 kHz

and CL = 0

ICC1

−

1.7

2.5

mA

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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