參數(shù)資料
型號(hào)： LDS9003-002-T2
廠商： IXYS
文件頁(yè)數(shù)： 16/30頁(yè)
文件大?。?/td> 425K
描述： IC TEMP/PWM CONTROLLER 16WQFN
標(biāo)準(zhǔn)包裝： 1
功能： 溫度監(jiān)控系統(tǒng)（傳感器）
傳感器類型： 外部
拓?fù)洌?/td> ADC，振蕩器，寄存器庫(kù)
輸出類型： I²C?
輸出警報(bào)： 無(wú)
輸出風(fēng)扇： 無(wú)
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(yīng)商設(shè)備封裝： 16-TQFN
包裝： 標(biāo)準(zhǔn)包裝
其它名稱： LDS9003-002-T2-6
LDS9003 / 9001
?009 IXYS Corp.
16
Doc. No. 9003/9001_DS, Rev. N1.0
Characteristics subject to change without notice
Table 12: Recommended Register Load Sequence for LDS9003/9001
Reg Load
Sequence #
Reg (hex)
Value (hex)
Comments
1*
1Eh
88h (9003) or  00h (9001)    Initialize Configuration Register
2*
00h
08h
IPWM1 current @ 1mA
3
01h
08h
IPWM2 current @ 1mA
4
02h
08h
IPWM3 current @ 1mA
5*
03h
A2h (9003) or 02h (9001)    Set up Led-sense configuration for 9003 & 9001
6*
04h
00h
Global PWM Dimming 00h is full ON = 100% DC
7*
05h
FBh
Duty Cycle code for IPWM1. Use set FBh=95% DC
8
06h
FBh
Same as reg 05h
9
07h
FBh
Same as reg 05h
10*
49h
00h
Ta-Tj 0ffset
11*
4Ah
1Eh
Set LED Shutdown temperature 1Eh = 120C
12*
4Bh
1Fh
Set optional  2x PWM adjust step start point; 1x
scale below this point
13*
A0h
36h
Load Si Diode K factor for - 1.71mV/C
14*
A2h
User Loads Per LED Used
User loads LED K factor @ 1mA I
F.
4Bh = -2.3mV/C for Luxeon Rebel WLED
15
A4h
User Loads Per LED Used
User loads LED K factor @ 1mA I
F.
for LED1
4Bh = -2.3mV/C for Luxeon Rebel WLED
16
A6h
User Loads Per LED Used   User loads LED K factor @ 1mA I
F
for LED2
17*
C0h
40h
Load Si Diode h factor = 1.0
18*
D4h
04h
Load Si Diode Rs = 68 ohms
19*
D6h
User Loads Per LED Used
User loads LED Rs for LED1
0Ah = 1.4 ohms for Luxeon Rebel WLED
20
D8h
User Loads Per LED Used    User loads LED Rs for LED2
21
DAh
User Loads Per LED Used    User loads LED Rs for LED3
22-47*
50h  5Fh    User Loads Per LED Used    LUT1 correction Table
48-64
60h  7Fh    User Loads Per LED Used    LUT2 correction Table
65-80
70h  7Fh    User Loads Per LED Used    LUT3 correction Table
81*
1Fh
10h
User issues temp calibration command
The advantage of PWM dimming is stable LED color
temperature / wavelength that is determined by the
maximum static mode LED current value set by the
external  HB  LED  driver.  The  integrated  PWM
generator reduces the system requirement to provide
a continuous pulsed waveform, and is automatically
adjusted by the LED-Sense
TM
algorithm to maintain
the programmed Temperature vs PWM DC thermal
control profile.
To use the  dynamic PWM mode for LED current
setting, the maximum I
LED
value should first be set by
the  HB  LED  Driver  current  setting  resistor  (per
vendor specifications) and the desired dimming / user
duty cycle can be set by registers 05h, 06h, and 07h.
The logarithmic operating mode provides a dimming
resolution of approximately -0.17 dB per step with
0dB dimming (i.e. 100% duty cycle) at the 256
th
step
(i.e. FFh), and 0% duty cycle (~ -80 dB dimming) at
00h.
Figure  8  shows  the  dimming  transfer  function  for
dimming  level  in  dB  (from  maximum  level)  vs
programmed data code (decimal).
Figure  9  shows  the  dimming  transfer  function  for
dimming level in percent (%) vs programmed data
code (decimal). 0% dimming is full ON brightness
(i.e. PWM duty cycle = 100%).
Register 04h is available as a global dimming control
register.  It  will  simultaneously  control  all  IPWM
generators  so  is  especially  helpful  in  applications
using the LDS9003. It is recommended that the user
use  registers  05h,  06h,  and  07h  to  establish  the
desired duty cycle at ambient room temperature (i.e
25篊)  conditions  that  account  for  further  LED-
Sense
TM
adjustment  over  temperature  per  the
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