Offline Controllers | UC3842B

高性能電流モード PWM コントローラ

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Overview

UC3842B/UC3843B シリーズは、高性能の固定周波数電流モード・コントローラです。オフライン/DC-DC コンバータ・アプリケーションに特化して設計され、設計者は費用効率が高いソリューションで外付け部品を最小限にすることができます。高精度デューティ比制御向けトリミング済み発振器、温度補償リファレンス、高ゲイン・エラー・アンプ、電流センシング・コンパレータ、高電流トーテムポール出力の機能があり、パワー MOSFET の駆動に最適です。入力/リファレンス低電圧ロックアウト (それぞれにヒステリシス、サイクル単位での電流制限、 プログラマブル出力デッドタイム、シングル・パルス・メータリング用ラッチを搭載) から成る保護機能もあります。8 ピン・デュアルインライン表面実装 (SO-8) プラスチック・パッケージと、14 ピン・プラスチック表面実装 (SO-14) で提供されます。SO-14 パッケージでは、トーテムポール出力段向けに、電力ピンとグランド・ピンが別になっています。UCX842B の UVLO 閾値は、16 V (オン) / 10 V (オフ) で、オフライン・コンバータに最適です。UCX843B は、UVLO 閾値が 8.5 V (オン) / 7.6 V (オフ) の電圧が低めのアプリケーションに向けて構成されています。

  • Trimmed Oscillator for Precise Frequency Control
  • Oscillator Frequency Guaranteed at 250 kHz
  • Current Mode Operation to 500 kHz
  • Automatic Feed Forward Compensation
  • Latching PWM for Cycle-By-Cycle Current Limiting
  • Internally Trimmed Reference with Undervoltage Lockout
  • High Current Totem Pole Output
  • Undervoltage Lockout with Hysteresis
  • Low Startup and Operating Current
  • Pb-Free Packages are Available

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Compliance

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)

Reference Price

UC3842BD1G

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Last Shipments

CAD Model

Pb

A

H

P

SOIC-8

751-07

1

260

TUBE

98

N

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Current Mode

52

No

Yes

Yes

No

No

30

200 / 200

Price N/A

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UC3842BD1R2G

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Active

CAD Model

Pb

A

H

P

SOIC-8

751-07

1

260

REEL

2500

N

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Current Mode

52

No

Yes

Yes

No

No

30

200 / 200

$0.2504

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UC3842BDG

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Obsolete

CAD Model

Pb

A

H

P

SOIC-14

751A-03

1

260

TUBE

55

N

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52

No

Yes

Yes

No

No

30

200 / 200

Price N/A

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UC3842BDR2G

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CAD Model

Pb

A

H

P

SOIC-14

751A-03

1

260

REEL

2500

N

Flyback

Current Mode

52

No

Yes

Yes

No

Yes

30

200 / 200

$0.3173

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UC3842BNG

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Pb

A

H

P

PDIP-8

626-05

NA

0

TUBE

50

N

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Current Mode

52

No

Yes

Yes

No

No

30

200 / 200

$0.52

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UC3842BVD1G

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Obsolete

CAD Model

Pb

A

H

P

SOIC-8

751-07

1

260

TUBE

98

N

Flyback

Current Mode

52

No

Yes

Yes

No

Yes

30

200 / 200

Price N/A

More Details

UC3842BVD1R2G

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Active

CAD Model

Pb

A

H

P

SOIC-8

751-07

1

260

REEL

2500

N

Flyback

Current Mode

52

No

Yes

Yes

No

No

30

200 / 200

$0.2589

More Details

UC3842BVDR2G

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Obsolete

CAD Model

Pb

A

H

P

SOIC-14

751A-03

1

260

REEL

2500

N

Flyback

Current Mode

52

No

Yes

Yes

No

Yes

30

200 / 200

Price N/A

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信頼性データ

Die Related Summary Data

Device: UC3842BD1G

Equivalent to wafer fab process: BP STD LINEAR

製品技術

製品技術

等価デバイス時間

MTBF/MTTF (時間)

FITS

BP STD LINEAR

10

12120914040

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Re-calculate Data

Data is based on the following assumptions.

Note: The temperature and confidence level may be adjusted to your requirements.

Disclaimer: A reliability FIT rate calculated using this tool shall not be used for any functional safety purpose. In case a raw FIT rate needs to be estimated for a component which is targeted to be used in a safety critical application (i.e. compliant to ISO 26262 standard) it should be calculated according to generic safety standards (IEC62380, IEC61709, SN29500, FIDES, etc.)

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