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參數資料
| 型號： | LDS89001008-T2 |
| 廠商： | IXYS CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | SWITCHING CONTROLLER, PDSO8 |
| 封裝： | 3 X 2 MM, ROHS COMPLIANT, MO-220, DFN-8 |
| 文件頁數： | 11/30頁 |
| 文件大小： | 622K |
| 代理商： | LDS89001008-T2 |
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LDS9003 / 9001
2009 IXYS Corp.
19
Doc. No. 9003/9001_DS, Rev. N1.0
Characteristics subject to change without notice
In Standby Mode, the I
2C interface remains active
and all registers retain their programmed information.
Further in Standby Mode the IPWMx current drivers
and internal clock are powered off; however, internal
regulators and reference circuits remain active to
insure power to the digital sections to hold register
values and maintain I
2C interface communications.
This results in standby current ~ 100 A typical. For
this mode, the EN pin should be logic HIGH with
signal level from 1.3 to VIN voltage.
SHUTDOWN MODE
To set LDS9003/9001 into the shutdown mode, the
EN pin should be logic low more than 10 ms. The
LDS9003/9001 shutdown current is less than 1 A.
The LDS9003/9001 wakes up from shutdown mode
with
factory-preset
default
data.
To
preserve
customer-programmed data, use the standby mode.
PROGRAMMING MODES
The LDS9003/9001 is factory pre-programmed with
certain default POR levels to facilitate both factory
testing and user operation. However, specific LEDs
and other user system conditions require user
programming of the temperature compensation LUTs
and other LED specific parameters.
The loading
of
these registers can easily be
conducted with a low cost “boot” type microcontroller
having non-volatile memory to hold system and user
parameters. 1K bits of non-volatile data storage is
sufficient for the LDS9003. 256 bits is required for the
LDS9001.
After initialization and user programming the user
should
conduct
an
I
2
C
calibration
sequence
command by writing Bit 4 = 1 in the Control register
1Fh. This conducts a real time calibration of the initial
starting temperature and actual LED parameters.
Upon completion, Bit 4 will be internally reset to 0,
and the LDS9003/9001 is ready for use.
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