Enhanced Off line Switcher for Robust and Highly Efficient Power Supplies

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Overview

The NCP1076A & NCP1076B products integrate a fixed frequency current mode controller with a 700 V MOSFET. Available in a two different pin out of the very common PDIP 7 package, it offers a high level of integration, including soft start, frequency jittering, short circuit protection, skip cycle, a maximum peak current set point, ramp compensation, and a dynamic self supply (DSS, eliminating the need for an auxiliary winding).
Unlike other monolithic solutions, the NCP1076A & NCP1076B is quiet by nature: during nominal load operation, the part switches at one of the available frequencies (65 or 100 kHz). When the output power demand diminishes, the IC automatically enters frequency foldback mode and provides excellent efficiency at light loads. When the power demand reduces further, it enters into a skip mode to reduce the standby consumption down to a no load condition.
Protection features include: a timer to detect an overload or a short circuit event, Over voltage Protection with auto recovery. Ac input line voltage detection prevents lethal runaway in low input voltage conditions (Brown-out) as well as too high an input line (Ac line Over voltage Protection). This also allows an Over power Protection to compensate all internal delays in high input voltage conditions and optimize the maximum output current capability.
For improved standby performance, the connection of an auxiliary winding stops the DSS operation and helps to reduce input power consumption below 50 mW at high line.

  • Auxiliary & Standby Power Supply
  • Major Home Appliances power supplies
  • Low to medium Power Chargers & Adapters
  • White Goods & Home Appliances
  • E-Meters
  • Industrial auxiliary Power Supply
  • Consumer Equipment Power Supply
  • Integrated 700 V MOSFET with RDS(on) of 4.7 Ω
  • Current-Mode Fixed Frequency Operation (65 & 100 kHz) - 130 kHz for B version only
  • Peak Current: NCP1076A/B = 650mA and NCP1077A/B = 800 mA
  • Skip-Cycle Operation at Low Peak Current
  • Dynamic Self-Supply (DSS)
  • Auto-Recovery Output Short Circuit Protection with Timer-Based Detection
  • Frequency Foldback Operation
  • 300 µA No Load Power Consumption
  • Frequency Jittering (including during frequency foldback mode)
  • Adjustable Brown-out Protection and OVP
  • Over Power Protection
  • 2nd Level Current Protection

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Product

Status

CAD Models

Compliance

Package Type

Case Outline

MSL Type

MSL Temp (°C)

Container Type

Container Qty.

ON Target

Control Mode

fsw Typ (kHz)

fJitter Typ (%)

Stand-by Mode

RDS(ON) Typ (Ω)

V(BR)DSS Max (V)

IPeak (mA)

HV Start-up Min (V)

DSS (mA)

UVLO

Short Circuit Protection

Over Power Compensation

Brown-out

Latch

Reference Price

NCP1076AAP065G

Loading...

Active

CAD Model

Pb

A

H

P

PDIP-7

NA

0

TUBE

50

Y

Current Mode

65

Yes

Yes

4.8

700

650

Yes

9.2

6.5

Yes

Yes

Yes

No

$0.7643

More Details

NCP1076AAP100G

Loading...

Active

CAD Model

Pb

A

H

P

PDIP-7

NA

0

TUBE

50

Y

Current Mode

100

Yes

Yes

4.8

700

650

Yes

9.2

6.5

Yes

Yes

Yes

No

$0.7541

More Details

NCP1076ABP065G

Loading...

Active

CAD Model

Pb

A

H

P

PDIP-7

NA

0

TUBE

50

Y

Current Mode

65

Yes

Yes

4.8

700

650

Yes

9.2

6.5

Yes

Yes

Yes

No

$0.8053

More Details

NCP1076ABP100G

Loading...

Active

CAD Model

Pb

A

H

P

PDIP-7

NA

0

TUBE

50

Y

Current Mode

100

Yes

Yes

4.8

700

650

Yes

9.2

6.5

Yes

Yes

Yes

No

$0.7544

More Details

NCP1076BAP065G

Loading...

Active

CAD Model

Pb

A

H

P

PDIP8 Less Pin 3

NA

0

TUBE

50

Y

Current Mode

65

Yes

Yes

4.8

700

650

Yes

9.2

6.5

Yes

Yes

Yes

No

$0.7894

More Details

NCP1076BAP100G

Loading...

Active

CAD Model

Pb

A

H

P

PDIP8 Less Pin 3

NA

0

TUBE

50

Y

Current Mode

100

Yes

Yes

4.8

700

650

Yes

9.2

6.5

Yes

Yes

Yes

No

$0.7659

More Details

NCP1076BAP130G

Loading...

Active

CAD Model

Pb

A

H

P

PDIP8 Less Pin 3

NA

0

TUBE

50

Y

Current Mode

130

Yes

Yes

4.8

700

650

Yes

9.2

6.5

Yes

Yes

Yes

No

$0.8724

More Details

NCP1076BBP065G

Loading...

Active

CAD Model

Pb

A

H

P

PDIP8 Less Pin 3

NA

0

TUBE

50

Y

Current Mode

65

Yes

Yes

4.8

700

650

Yes

9.2

6.5

Yes

Yes

Yes

No

$0.8053

More Details

NCP1076BBP100G

Loading...

Active

CAD Model

Pb

A

H

P

PDIP8 Less Pin 3

NA

0

TUBE

50

Y

Current Mode

100

Yes

Yes

4.8

700

650

Yes

9.2

6.5

Yes

Yes

Yes

No

$0.8053

More Details

NCP1076BBP130G

Loading...

Active

CAD Model

Pb

A

H

P

PDIP8 Less Pin 3

NA

0

TUBE

50

Y

Current Mode

130

Yes

Yes

4.8

700

650

Yes

9.2

6.5

Yes

Yes

Yes

No

$0.8053

More Details

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