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AK2557 - 4ch Cathode Common LDD

Description

The AK2557 is a 4-channel cathode common LDD (Laser Diode Driver) suitable for MFPs (Multi Function Printer) and LBPs (Laser Beam Printer).

Features

  • 4ch Cathode Common LDD Switching LD Current at 200MHz [Max].
  • 9-bit Current-DAC for “Ibias”: Maximum Output Current = 45mA [Typ. ].
  • 9-bit Current-DAC for “Isw” with AGC (Auto Gain Control): Maximum Output Current = 90mA [Typ. ].
  • Feed-Back Digital APC (APC_FB) and Internal APC Adjustment Circuit with Digital Interface.
  • Monitor PD Current Input for 4 Beams LD and Multi-Beams LD (by Cascade Connection).
  • “BIAS_APC” (Auto “Ibias” Setting).

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Datasheet Details

Part number AK2557
Manufacturer AKM
File Size 147.84 KB
Description 4ch Cathode Common LDD
Datasheet download datasheet AK2557 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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[AK2557] = Preliminary = AK2557 4ch Cathode Common LDD with Digital APC 1. General Description The AK2557 is a 4-channel cathode common LDD (Laser Diode Driver) suitable for MFPs (Multi Function Printer) and LBPs (Laser Beam Printer). The AK2557 equips a 200MHz [Max.] LDD that switches the LD current, current-DACs that set the operation current of LD and a feed-back digital APC (Auto Power Control) circuit that maintains the optical LD power constant. The AK2557 can improve the printing quality and reduces external parts and the cost with useful functions such as the internal APC adjustment, BIAS_APC (Auto “Ibias” Setting), LD Power Attenuation and Shading Correction with digital interface achieving with the internal arithmetic circuits.
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