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NCP1251

Current-Mode PWM Controller for Off-line Power Supplies

ON Semiconductor 

NCP1251

MAXIMUM RATINGS TABLE

Symbol

Rating

Value

Unit

VCC

VDRVtran

Power Supply voltage, VCC pin, continuous voltage

Maximum DRV pin voltage when DRV in H state, transient voltage (Note 1)

Maximum voltage on low power pins CS, FB and OPP

28

V

VCC + 0.3

V

−0.3 to 10

V

IOPP Maximum injected negative current into the OPP pin (pin 3)

−2

mA

ISCR

RqJA

TJ,max

Maximum continuous current into the VCC pin while in latch mode

Thermal Resistance Junction−to−Air

Maximum Junction Temperature

Storage Temperature Range

3

360

150

−60 to +150

mA

°C/W

°C

°C

ESD Capability, Human Body Model (HBM), all pins

2

kV

ESD Capability, Machine Model (MM)

200

V

Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the

Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect

device reliability.

1. The transient voltage is a voltage spike injected to DRV pin being in high state. Maximum transient duration is 100 ns.

2. This device series contains ESD protection and exceeds the following tests: Human Body Model 2000 V per Mil−Std−883, Method 3015.

Machine Model Method 200 V.

3. This device contains latch−up protection and exceeds 100 mA per JEDEC Standard JESD78.

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