AK2550

[AK2550]
= Preliminary =
AK2550
1ch Anode Common LDD with APC
1.
General Description
AK2550 is the single channel anode common LDD (Laser Diode Driver) suitable for MFP (MultiFunction Printer) and LBP (Laser Beam Printer).
AK2550 equips the LDD switching the LD (Laser Diode) current, and the feed-back APC (Auto Power
Control) maintaining the optical LD power constant with monitoring the PD (Photo Diode) current (Ipd)
and adjusting the operation current (Iop) for the LD.
AK2550 is applicable to the system which power supply voltage is 3.3V [Typ.] or 5V [Typ.].
2.
Feartures
□ 1ch Anode Common LDD:
Supplying the bias current (Ibias) and the switching current (Isw)
□ Feed-Back APC (APC_FB):
Maintaining the optical LD power constant with monitoring PD current (Ipd), and adjusting LD
current (Iop) by the control for Ibias or Isw
□ Error Detection:
Detecting the power supply voltage (LVDD) dropping, the excessive LD current output and the
disconnection on LVDS lines
□ Power Supply Voltage:
3.3V±5% or 5V±5%
□ Package:
20pin QFN with the exposed pad
AK2550-E-Preliminay0.82 (Brief)
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[AK2550]
3.
VDD
LVDD
DATAN
SH
DIS
DATAEN
ILD
LOGIC
DATAP
100Ω
Block Diagram
LD
Iop
LVDS
VSW
RSW
ISW
_GEN
Rsw
VBIAS
RBIAS
IBIAS
_GEN
Rbias
10kΩ
CVOUT
CONST-V
APCTGT
VREFGEN
Ipd
PD
ALM
ERROR
DETECT
REF
Rref
PD
Rpd
CSH
VSS
VSS
Csh
Figure 3-1 AK2550 Block Diagram
AK2550-E-Preliminay0.82 (Brief)
2015/7
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[AK2550]
4.
4.1.
Package
Outline Dimensions
0.35±0.07
3.00±0.07
1.80
A
1.50
0.40×4=1.60±0.05
11
15
16
10
1.80
8-0.25
0.60
1.50
3.00±0.07
B
6
×4
0.10
S A B
0.60
20
1
5
C0.20
0.20±0.05
0.05 M S A B
0.05 S
0.40
A部
0.15~0.25
0.00~0.05
0.05MAX
0.80±0.05
0.85MAX
S
0.15~0.25
【A 部拡大図】
4.2. Marking
2550
YWWX
a. Pin#1 Index:
b. Marking:
c. date code:
Y:
WW:
X:
O
2550
YWWX (4 Digits)
Year
Week (1~52)
Administration code
AK2550-E-Preliminay0.82 (Brief)
2015/7
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[AK2550]
IMPORTANT NOTICE
0. Asahi Kasei Microdevices Corporation (“AKM”) reserves the right to make changes to the
information contained in this document without notice. When you consider any use or
application of AKM product stipulated in this document (“Product”), please make inquiries the
sales office of AKM or authorized distributors as to current status of the Products.
1. All information included in this document are provided only to illustrate the operation and
application examples of AKM Products. AKM neither makes warranties or representations with
respect to the accuracy or completeness of the information contained in this document nor
grants any license to any intellectual property rights or any other rights of AKM or any third
party with respect to the information in this document. You are fully responsible for use of such
information contained in this document in your product design or applications. AKM ASSUMES
NO LIABILITY FOR ANY LOSSES INCURRED BY YOU OR THIRD PARTIES ARISING FROM
THE USE OF SUCH INFORMATION IN YOUR PRODUCT DESIGN OR APPLICATIONS.
2. The Product is neither intended nor warranted for use in equipment or systems that require
extraordinarily high levels of quality and/or reliability and/or a malfunction or failure of which
may cause loss of human life, bodily injury, serious property damage or serious public impact,
including but not limited to, equipment used in nuclear facilities, equipment used in the
aerospace industry, medical equipment, equipment used for automobiles, trains, ships and
other transportation, traffic signaling equipment, equipment used to control combustions or
explosions, safety devices, elevators and escalators, devices related to electric power, and
equipment used in finance-related fields. Do not use Product for the above use unless
specifically agreed by AKM in writing.
3. Though AKM works continually to improve the Product’s quality and reliability, you are
responsible for complying with safety standards and for providing adequate designs and
safeguards for your hardware, software and systems which minimize risk and avoid situations
in which a malfunction or failure of the Product could cause loss of human life, bodily injury or
damage to property, including data loss or corruption.
4. Do not use or otherwise make available the Product or related technology or any information
contained in this document for any military purposes, including without limitation, for the design,
development, use, stockpiling or manufacturing of nuclear, chemical, or biological weapons or
missile technology products (mass destruction weapons). When exporting the Products or
related technology or any information contained in this document, you should comply with the
applicable export control laws and regulations and follow the procedures required by such laws
and regulations. The Products and related technology may not be used for or incorporated into
any products or systems whose manufacture, use, or sale is prohibited under any applicable
domestic or foreign laws or regulations.
5. Please contact AKM sales representative for details as to environmental matters such as the
RoHS compatibility of the Product. Please use the Product in compliance with all applicable
laws and regulations that regulate the inclusion or use of controlled substances, including
without limitation, the EU RoHS Directive. AKM assumes no liability for damages or losses
occurring as a result of noncompliance with applicable laws and regulations.
6. Resale of the Product with provisions different from the statement and/or technical features set
forth in this document shall immediately void any warranty granted by AKM for the Product and
shall not create or extend in any manner whatsoever, any liability of AKM.
7. This document may not be reproduced or duplicated, in any form, in whole or in part, without
prior written consent of AKM.
AK2550-E-Preliminay0.82 (Brief)
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