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參數(shù)資料
| 型號(hào)： | ISL6425ERZ |
| 廠商： | INTERSIL CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Single Output LNB Supply and Control Voltage Regulator with I2C Interface for Advanced Satellite Set-top Box Designs |
| 中文描述： | 0.95 A SWITCHING CONTROLLER, 240 kHz SWITCHING FREQ-MAX, PQCC32 |
| 封裝： | 5 X 5 MM, LEAD FREE, PLASTIC, MO-220VHHD-2, QFN-32 |
| 文件頁數(shù)： | 10/12頁 |
| 文件大?。?/td> | 285K |
| 代理商： | ISL6425ERZ |
10
FN9176.1
February 8, 2005
Received Data (
I
2
C
Bus Read Mode)
The ISL6425 can provide to the master a copy of the System
Register information via the I
2
C 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 clock bits,
the ISL6425 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 ISL6425.
Not acknowledge, stopping the read mode
communication.
While the whole register is read back by the microprocessor,
only the two read-only bits, OLF and OTF, convey diagnostic
information about the ISL6425.
Power-On I
2
C Interface Reset
The I
2
C interface built into the ISL6425 is automatically reset
at power-on. The I
2
C interface block will receive a Power OK
logic signal from the UVLO circuit. This signal will go HIGH
when chip power is OK. As long as this signal is LOW, the
interface will not respond to any I
2
C commands and the
system register SR is initialized to all zeros, thus keeping the
power blocks disabled.
TABLE 5. SYSTEM REGISTER (SR1 AND SR2) CONFIGURATION
SR1
DCL
ISEL1
ENT1
LLC1
VSEL1
EN1
OLF1
FUNCTION
0
X
X
X
0
0
X
X
SR1 is selected
0
X
X
X
0
0
1
X
Vout1 = 13V, Vboost1 = 13V + Vdrop
0
X
X
X
0
1
1
X
Vout1 = 18V, Vboost1 = 18V + Vdrop
0
X
X
X
1
0
1
X
Vout1 = 14V, Vboost1 = 14V + Vdrop
0
X
X
X
1
1
1
X
Vout1 = 19V, Vboost1 = 19V + Vdrop
0
X
X
0
X
X
1
X
22kHz tone is controlled by the DSQIN pin
0
X
X
1
X
X
1
X
22kHz tone is ON, the DSQIN input is disabled
0
X
0
X
X
X
1
X
Iout1 = 425mA max.
0
X
1
X
X
X
1
X
Iout1 = 775mA max.
0
1
X
X
X
X
1
X
Dynamic current limit NOT selected
0
0
X
X
X
X
1
X
Dynamic current limit selected
0
X
X
X
X
X
0
X
PWM and Linear for channel 1 disabled
SR2
-
-
-
-
EN2
OTF
-
FUNCTION
1
X
X
X
X
0
X
X
SR2 is selected; to read OTF flag.
NOTE: OTF is a “Read Only” bit and X indicates a “Don’t Care” condition for the function specified.
TABLE 6. READING SYSTEM REGISTERS
DCL ISEL ENT LLC VSEL EN OTF OLF
FUNCTION
These bits are read as they were
after the last write operation.
0
Tj
≤
130°C, Normal
operation
1
Tj > 150°C, Power
blocks disabled
0
Iout < Imax, Normal
operation
1
Iout > Imax, Overload
protection triggered
ISL6425
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| ISL6425ERZ-T | 功能描述:電流型 PWM 控制器 SINGLE LNBP SUPPLY CONTROL VG W/TTL INP RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
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| ISL6426CR | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Intersil Corporation 功能描述: |
| ISL6426CV | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Intersil Corporation 功能描述: |
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