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參數(shù)資料
| 型號(hào)： | LNBH221PD-TR |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.75 A DUAL SWITCHING CONTROLLER, PDSO36 |
| 封裝： | POWER, SO-36 |
| 文件頁(yè)數(shù)： | 6/29頁(yè) |
| 文件大?。?/td> | 800K |
| 代理商： | LNBH221PD-TR |
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LNBH221 software description (same for both section)
LNBH221
14/27
6.3
Transmitted data (I2C BUS write mode)
When the R/W bit in the chip address is set to 0, the main P can write on the System
Register (SR) of the LNBH221 via I2C bus. Only 6 bits out of the 8 available can be written
by the P, since the remaining 2 are left to the diagnostic flags, and are read-only.
X= don't care.
Values are typical unless otherwise specified.
6.4
Received data (I2C bus READ MODE)
The LNBH221 can provide to the Master a copy of the SYSTEM REGISTER information via
I2C bus in read mode. The read mode is Master activated by sending the chip address with
R/W bit set to 1.
At the following master generated clocks bits, the LNBH221 issues a byte on the SDA data
bus line (MSB transmitted first).
At the ninth clock bit the MCU master can:
- acknowledge the reception, starting in this way the transmission of another byte from the
LNBH221;
- no acknowledge, stopping the read mode communication.
While the whole register is read back by the P, only the two read-only bits OLF and OTF
convey diagnostic informations about the LNBH221.
Values are typical unless otherwise specified.
PCL
TTX
TEN
LLC VSEL
EN
OTF
OLF
Function
001
X
VOUT=13.25V, VUP=15.25V
011
X
VOUT=18V, VUP=20V
101
X
VOUT=14.25V, VUP=16.25V
111
X
VOUT=19.5V, VUP=21.5V
0
1
X
22KHz tone is controlled by DSQIN pin
1
X
22KHz tone is ON, DSQIN pin disabled
01
X
VORX output is ON, output voltage controlled by VSEL
and LLC
1X
X
VOTX output is ON, 22KHz controlled by DSQIN or TEN,
output voltage level controlled by VSEL and LLC
0
1
X
Pulsed (dynamic) current limiting is selected
1
X
Static current limiting is selected
XXXX
X
0
XX
Power blocks disabled
PCL
ISEL
TEN
LLC VSEL
EN
OTF
OLF
Function
These bits are read exactly the same as
they were left after last write operation
0TJ<140°C, normal operation
1TJ>150°C, power block disabled
0IOUT<IOMAX, normal operation
1IOUT>IOMAX, overload protection triggered
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