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參數(shù)資料
| 型號(hào)： | LDS89001008-T2 |
| 廠商： | IXYS CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, PDSO8 |
| 封裝： | 3 X 2 MM, ROHS COMPLIANT, MO-220, DFN-8 |
| 文件頁數(shù)： | 28/30頁 |
| 文件大小： | 622K |
| 代理商： | LDS89001008-T2 |
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LDS9003 / 9001
2009 IXYS Corp.
7
Doc. No. 9003/9001_DS, Rev. N1.0
Characteristics subject to change without notice
ADDRESS
DESCRIPTION
BITS
NOTES
Bit [3:0] = Tj-Ta offset for the Si diode.
Typically should set both offsets to be equal.
See Table 5 & 6
4Ah
LED Shutdown
Temperature
5
Defines T-code, at which IPWMs channels are shut down
(i.e. 0% duty cycle) per LED vendor reliability and de-rating
specification (see Table 5); Factory default value = 11100
(bin) = 1Ch represents 105
0C Tj
4Bh
2-x Table enable and
breakpoint (T-code)
6
Bit 5 = 1 enables 2-
x scale LUT ΔPWM code correction (de-
rating) starting at the breakpoint set by T-code (bits 4:0)
Bit 5 = 0 ; 1x scale (default) for entire temperature range
Bit [4:0] defines T-code, where temperature de-rating starts,
or where 2x scaling begins (see Table 6)
50h – 5Fh
Temp vs IPWM1 DC LUT
-35C to 120C
(one 5C step every
nibble)
(IPWM LUT for 9001)
ΔPWM code1[7:4],
ΔPWM code0[3:0] –
ΔPWM code 31[7:4],
ΔPWM code 30[3:0]
8
Two LUT words per I
2C address.
Each word contains two 4-
bit numbers representing of ΔPWM
codes. See
Table 6 and Appendix 1 for LUT programming.
60h – 6Fh
Temp vs IPWM2 DC LUT
-35C to 120C
(one 5C step every
nibble)
ΔPWM code1[7:4],
ΔPWM code0[3:0] –
ΔPWM code 31[7:4],
ΔPWM code 30[3:0]
8
Same as above for regs 50h-5Fh
Not used for 9001
70h – 7Fh
Temp vs IPWM3 DC LUT
-35C to 120C
(one 5C step every
nibble)
ΔPWM code1[7:4],
ΔPWM code0[3:0] –
ΔPWM code 31[7:4],
ΔPWM code 30[3:0]
8
Same as above for regs 50h -5Fh
Not used for 9001
A0h
Silicon diode dVF/dT [7:0]
8
Silicon diode VF temperature coefficient (K factor) :
Factory recommended loaded value is 36h = -1.71 mV/°C
= 001 10110 (bin),
where bits from bit 7 to bit 5 represent integer part
[1(decimal) = 001 (bin)], and bits from bit 4 to bit 0 – fractional
part [0.710 / 0.03125 = 22 (decimal) = 10110 (bin)]
A2h
LED1 dVF/dT [7:0]
(connected to TSENSE1;
TSENSE for 9001)
8
User-loaded VF temperature coefficient @ 1mA for LEDs
used at TSENSE1 (TSENSE for 9001)
Negative tracking is assumed with temperature;
Bits from bit 7 to bit 5 represent integer part and
bits from bit 4 to bit 0 - fractional part of the coefficient
Example: Temperature coefficient = -2.26 mV/
0C;
Bit 7 – bit 6 = 2 (decimal) = 010 (bin), and
Bit 4 – bit 0 = INT{0.26 / 0.03125} = 8 (decimal) = 01000 (bin)
User loads 010 01000 (bin) = 48h = -2.25 (closest setting)
A4h
LED2 dVF/dT [7:0]
(connected to TSENSE2)
8
Same as above reg A2h
Not used for 9001
\
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