參數(shù)資料
型號(hào)： AK2573AVB
廠商： Asahi Kasei Microsystems Co.,Ltd
英文描述： 125M / 156M Laser Diode Driver + APC
中文描述： 1.25億/ 1.56 apc的激光二極管驅(qū)動(dòng)器
文件頁數(shù)： 14/38頁
文件大小： 286K
代理商： AK2573AVB
ASAHI KASEI
[AK2573A]
<MS0189-E-01>
-14-
2004/5
3.2 Duty Adjustment
AK2573A supplies a programmed duty adjustment in response to the temperature from an on-chip temperature
sensor (every 6
℃
, Duty data is stored in E_DUTY_TC, see Table 8-3 for more information). Write same data into
E_DUTY_TC for constant duty adjustment. Table 3-3 and 3-4 show the characteristics of duty adjustment function.
Table 3-3 Duty Adjustment characteristics
Item
Maximum Pulse Extended
1 LSB Pulse Extended Step
Pulse Extended Stability
Symbo
Td
Tstep
Tsta
min
0.5
typ
0.03
max
0.2
Unit
ns
ns
ns
Remarks
Note 1
32 Steps
Ta=-40 to85
℃
, VDD=3.1
～
3.5V, 0.3ns Extended (Note 1)
Note 1: This parameter is characterized and is not 100% tested.
Table 3-4 Pulse Extended
R_DUTY
Pulse Extended (typ) [ns]
0
1
2
.
.
30
31
Remark
0
0.03
0.06
.
.
0.90
0.93
4. APC
The AK2573A has two APC functions, APC FF (Feed-forward) and APC FB (Feedback).
APC FF supplies a programmed current in response to the temperature from an on-chip temperature sensor.
APC_FB provides stable a power control function using a digital feedback algorithm. The APC_FF and APC_FB is
user programmable. Fig4-1 illustrates APC block diagram.
Fig 4-1 APC Block Diagram
I-DAC1
IMODN
OPTALM
TEMPSN
S
ADC
EEPROM
CURR
ALM
Over current ALM
(RE_CURRALM)
CURRALM
APC Feedback
(R_APC_FB)
PDGAIN
Monitor
PD
1/N
APC Target
(RE_APC_TRGT)
OPTALM
OPTALM Reference
(optalm_ref)
PDIN
Ibias
I-DAC2
PDMON
RPD
CPD
DAC_APC
ATT
+
+
APC FF
(R_DAC1_FF)
APC FF
(R_DAC2_FF)
TEMP
ALM
Temperature ALM
(RE_TEMPALM)
TEMPALM
R_TEMP
vpd
vapc_ref
APC_
COMP
R_DAC1
R_DAC2
Driver
IMOD
TEMPMON
RE_TEMP_OFFSET
ALM Polarity
(RE_ALM_POL)
APC Operation
(RE_APC_FF_SET)
Gain
(RE_DAC2_GAIN)
Gain
(RE_DAC1_GAIN)
ALM Polarity
(RE_ALM_POL)
ALMPolarity
(RE_ALM_POL)
OPTALM
(RE_OPTALM_)
PDGAIN
(RE_PDGAIN)
APC FB Operation
(RE_APC_FB_SET)
K_DAC1
_FBRT
K_DAC2
_FBRT
I-DAC1 FB
(R_DAC1_FB)
I-DAC2 FB
(R_DAC2_FB)
R_DAC2
R_DAC1
Imod
apc_comp_out
1/s
* 0.0095
IBIAS
* 0.0095
BIASMON
MODMO
N
Digital Filter
APC FB Initial setting
(RE_APC_INIT_SET)
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AK2574 制造商:AKM 制造商全稱:AKM 功能描述:156M Laser Diode Driver + APC for Burst Mode
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AK2581HB-AT-LF 功能描述:風(fēng)扇 254x89mm 110/120VAC Hi Spd Ball Term RoHS:否 制造商:Sanyo Denki 產(chǎn)品:Fans 電流類型: 電源電壓:48 V 氣流:636 CFM 軸承類型: 噪聲:83 dBA 速度:6400 RPM 功率額定值:264 W 框架尺寸 (mm):172 mm x 150 mm x 102 mm 外殼材料:Aluminum 端接類型:Wire 系列:
AK2581HB-AW 制造商:ADDA Corporation 功能描述:AC-FAN, 254X89 MM, 115/60 VOLT 制造商:ADDA Corporation 功能描述:AXIAL FAN 254MM 115VAC 620mA 制造商:ADDA Corporation 功能描述:AXIAL FAN, 254MM, 115VAC, 620mA 制造商:ADDA Corporation 功能描述:AK Series 2100/2000 RPM 254 x 89 mm 115 V 680/630 CFM Ball Bearing AC Fan 制造商:ADDA Corporation 功能描述:AXIAL FAN, 254MM x 89MM, 115VAC, 620MA; Frame Dimensions:254mm x 89mm; Supply Voltage:115VAC; Current Rating:620mA; Flow Rate - Imperial:630cu.ft/min; Noise Rating:62dBA; Bearing Type:Ball; Power Connection Type:Wire Leaded ;RoHS Compliant: Yes 制造商:ADDA 功能描述:AK Series 2100/2000 RPM 254 x 89 mm 115 V 680/630 CFM Ball Bearing AC Fan
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