參數(shù)資料
型號： LDS9003-002-T2
廠商： IXYS
文件頁數(shù)： 15/30頁
文件大?。?/td> 425K
描述： IC TEMP/PWM CONTROLLER 16WQFN
標準包裝： 1
功能： 溫度監(jiān)控系統(tǒng)（傳感器）
傳感器類型： 外部
拓撲： ADC，振蕩器，寄存器庫
輸出類型： I²C?
輸出警報： 無
輸出風扇： 無
電源電壓： 2.5 V ~ 5.5 V
工作溫度： -40°C ~ 125°C
安裝類型： 表面貼裝
封裝/外殼： 16-WFQFN 裸露焊盤
供應商設備封裝： 16-TQFN
包裝： 標準包裝
其它名稱： LDS9003-002-T2-6
LDS9003 / 9001
?009 IXYS Corp.
15
Doc. No. 9003/9001_DS, Rev. N1.0
Characteristics subject to change without notice
can  re-enable  the  channels  by  re-writing  to  the
channel enable bits in register 03h, however the OT
flag will still remain HIGH, until the device is power
sequenced, reset, or placed in the shutdown mode.
If a Ta-Tj offset is used other than 00h (i.e. 0篊) in
register,   49h,   than   the   shutdown   junction
temperature loaded in 4Ah should also include this
offset. This insures the LED shutdown is also properly
referenced to the same reference temperature level
IXYS can provide customers with software support to
generate the LUT data tables. In addition, a separate
applications report can be obtained. Please consult a
sales representative or the factory to obtain.
Table 11:  PWM LUT Register Load Example
LUT1
LUT2
LUT3
Address (hex)    Data (hex)    Address (hex)    Data (hex)    Address (hex)    Data (hex)
50
00
60
00
70
00
51
0F
61
0F
71
0F
52
00
62
00
72
00
53
0F
63
0F
73
0F
54
00
64
00
74
00
55
0F
65
0F
75
0F
56
00
66
00
76
00
57
10
67
10
77
10
58
01
68
01
78
01
59
00
69
00
79
00
5A
01
6A
01
7A
01
5B
EF
6B
EF
7B
EF
5C
BD
6C
BD
7C
BD
5D
AA
6D
AA
78D
AA
5E
9B
6E
9B
7E
9B
5F
09
6F
09
7F
09
Recommended User Register Initialization
Table 12 is provided as a recommended user I
2
C
register initialization and calibration sequence for the
LDS9003 and LDS9001 respectively. Register load
(i.e. write) steps marked with * mean LDS9001
steps, as well as LDS9003. Data value entries in
RED  indicate  the  data  value  is  user  /  system
dependent. Values shown for these registers are for
example only.
IPWM Current Setting & Interface
IPWMx Current setting registers 00h  02h should
be programmed to 08h  using the I
2
C interface to set
the  peak  DC  level  current  for  the  IPWM  current
source(s).  This sets for 1mA ?% DC current, and
the LDS9003 LED-Sense
TM
configuration code 2Ah,
or 02h for LDS9001, should be programmed using
register 03h during initialization.
IPWMx  are  current  source  outputs.  Users  must
connect  an  external  resistor  to  GND  from  each
output to establish the peak to peak PWM voltage
level required by the HB LED driver. This is depicted
in Figure 7.
Figure 7: Setting up PWM Voltage Level to HB LED
Driver
Digital  dimming  using  the  internal  PWM  generator
changes the duty cycle per the value set in registers
05h, 06h, and 07h and therefore adjusts the average
LED current. This is referred to as dynamic mode.
For dynamic mode, the LDS9003/9001 integrates a
digital PWM generator(s) that operates at a frequency
of ~ 285 Hz. It operates in Logarithmic Mode. The
PWM  generator  has 12-bit  resolution  and  can  be
programmed  with  an  8-bit  code  to  provide  256
internally mapped 12-bit logarithmic duty cycle steps
to adjust the dimming level
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