Automotive Current Mode PWM Controller

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Overview

The CS2841B provides all the necessary features to implement off-line fixed frequency current-mode control with a minimum number of external components.

The CS2841B (a variation of the CS-2843A) is designed specifically for use in automotive operation. The low start threshold voltage of 8.0V (typ), and the ability to survive 40V automotive load dump transients are important for automotive subsystem designs. The CS-2841 series has a history of quality and reliability in automotive applications.

The CS2841B incorporates a precision temperature-controlled oscillator with an internally trimmed discharge current to minimize variations in frequency. Duty-cycles greater than 50% are also possible. On board logic ensures that VREF is stabilized before the output stage is enabled. Ion implant resistors provide tighter control of under-voltage lockout.

  • Optimized for Off-line Control
  • Internally Trimmed Temperature Compensated Oscillator
  • Maximum Duty-cycle Clamp
  • VREF Stabilized before Output Stage Enabled
  • Low Start-up Current
  • Pulse-by-pulse Current Limiting
  • Improved Undervoltage Lockout
  • Double Pulse Suppression
  • 1% Trimmed Bandgap Reference
  • High Current Totem Pole Output
  • Pb-Free Packages are Available

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Product

Status

CAD Models

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Package Type

Case Outline

MSL Type

MSL Temp (°C)

Container Type

Container Qty.

ON Target

Topology

Control Mode

fsw Typ (kHz)

Stand-by Mode

UVLO (V)

Short Circuit Protection

Latch

Soft Start

VCC Max (V)

Drive Cap. (mA)

Pricing ($/Unit)

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CS2841BEDR14G

Obsolete

Pb

A

H

P

SOIC-14

1

260

REEL

2500

N

Flyback

Current Mode

52

No

Yes

Yes

No

No

40

200 / 200

Price N/A

More Details

CS2841BEBN8G

Obsolete

Pb

A

H

P

PDIP-8

NA

0

TUBE

1

N

Flyback

Current Mode

52

No

Yes

Yes

No

No

40

200 / 200

Price N/A

More Details

CS2841BED14

Obsolete

Pb

A

H

P

SOIC-14

1

235

TUBE

55

N

Flyback

Current Mode

52

No

Yes

Yes

No

No

40

200 / 200

Price N/A

More Details

CS2841BEDR14

Obsolete

Pb

A

H

P

SOIC-14

1

235

REEL

2500

N

Flyback

Current Mode

52

No

Yes

Yes

No

No

40

200 / 200

Price N/A

More Details

CS2841BED14G

Obsolete

Pb

A

H

P

SOIC-14

1

260

TUBE

1

N

Flyback

Current Mode

52

No

Yes

Yes

No

No

40

200 / 200

Price N/A

More Details

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