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参数资料
| 型号： | ADM1041A |
| 厂商： | Analog Devices, Inc. |
| 英文描述： | Secondary-Side Controller with Current Share and Housekeeping |
| 中文描述： | 二次侧电流控制器共享和管家 |
| 文件页数： | 37/56页 |
| 文件大小： | 991K |
| 代理商： | ADM1041A |
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ADM1041A
EXTENDED SMBus ADDRESSING
It is possible to use more than three ADM1041As in a single
power supply. The first time the device is powered up, Bit 1 of
Configuration Register 1 (ADD1) is 0. This means that only
three device addresses are initially available as defined by
ADD0; if there are more than three devices in a system, two or
more of them have duplicate addresses. See Figure 38.
Rev. 0 | Page 37 of 56
To overcome this, the ICT pin has additional functionality.
Taking ICT below GND temporarily disables the SMBus
function of the device. Thus, if the ICT pin of all devices in
which ADD1 is to remain 0 are taken negative, the ADD1 bits
of all other devices can be set to 1 via the SMBus. Each device
then has a unique address. Internal diodes clamp the negative
voltage to about 0.6 V, and care should be taken to limit the
current to less than approximately 5 mA on each ICT input to
prevent the possibility of damage or latch-up. The suggested
current is 3 mA. One example of a suitable circuit is given in
Figure 38. The ADM1041As can then be configured and
trimmed. If required, AC_OKLink and PS
ON
LINK must be
configured last. If ICT is used for its intended purpose as a
current transformer input, care must be taken with the circuit
design to allow the extended SMBus addressing to work.
SDA/PS
ON
LINK
The SDA pin normally carries data in and out of the
ADM1041A during programming/configuration or while
reading/writing by a microprocessor. If a microprocessor is not
used, this pin can be configured as PS
ON
LINK and can be
connected to the same pin on other ADM1041As in the power
supply. If a fault is detected in any ADM1041A, causing it to
shut down, it uses this pin to signal the other ADM1041As to
also shut down. If an auto-restart has been configured, it also
causes all ADM1041As to turn on together.
SCL/AC_OKLink
The SCL pin normally provides a clock signal into the
ADM1041A during programming/configuration or while
reading/writing by a microprocessor. If a microprocessor is not
used, this pin can be configured as AC_OKLink, and can be
connected to the same pin on other ADM1041As in the power
supply. This allows a single ADM1041A to be used for ac
sensing and helps to synchronize the start-up of multiple
ADM1041As.
BACKDOOR ACCESS
After SCL and SDA have been configured as AC_OKLink and
PS
ON
LINK, it may be desired to recover the SMBus access to
the ADM1041A. Changes may be necessary to the internal
configuration or trim bits. This is achieved by holding the SCL
and SDA pins at 0 V (ground) while cycling V
DD
. SCL and SDA
then revert to SMBus operation. See Figure 38.
ADD1 = 1
ADD1 = 0
2.4mA
8
13
14
15
8
13
14
15
8
13
14
15
8
13
14
15
8
13
14
15
8
13
14
15
V
DD
–12V
EXTENDED
SMBus
ADDRESSING
BACKDOOR
DEVICE 0
DEVICE 1
DEVICE 2
DEVICE 3
DEVICE 4
DEVICE 5
V
DD
N/C
4k
Ω
4k
Ω
4k
Ω
N/C
PS
ON
LINK
AC_OKLink
V
DD
ICT
SCL
SDA
ADD0
ICT
SCL
SDA
ADD0
ICT
SCL
SDA
ADD0
ICT
SCL
SDA
ADD0
ICT
SCL
SDA
ADD0
ICT
SCL
SDA
ADD0
0
Figure 38. Extended SMBus Addressing and Backdoor Access
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| ADM1041AARQZ | 功能描述:IC SECONDARY SIDE CTRLR 24QSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电源控制器，监视器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 应用:多相控制器 输入电压:- 电源电压:9 V ~ 14 V 电流 - 电源:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（5x5） 包装:带卷 (TR) |
| ADM1041AARQZ-REEL | 功能描述:IC SECONDARY SIDE CTRLR 24QSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电源控制器，监视器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 应用:多相控制器 输入电压:- 电源电压:9 V ~ 14 V 电流 - 电源:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（5x5） 包装:带卷 (TR) |
| ADM1041AARQZ-REEL7 | 功能描述:IC SECONDARY SIDE CTRLR 24QSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电源控制器，监视器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 应用:多相控制器 输入电压:- 电源电压:9 V ~ 14 V 电流 - 电源:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（5x5） 包装:带卷 (TR) |
| ADM1041A-EVALZ | 功能描述:BOARD EVAL FOR ADM1041A RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:- 标准包装:1 系列:- 主要目的:DC/DC，步降 输出及类型:1，非隔离 功率 - 输出:- 输出电压:3.3V 电流 - 输出:3A 输入电压:4.5 V ~ 28 V 稳压器拓扑结构:降压 频率 - 开关:250kHz 板类型:完全填充 已供物品:板 已用 IC / 零件:L7981 其它名称:497-12113STEVAL-ISA094V1-ND |
| ADM1041ARQ | 功能描述:IC PWR SUPP MON/LOAD SHAR 24QSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 电源控制器，监视器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 应用:多相控制器 输入电压:- 电源电压:9 V ~ 14 V 电流 - 电源:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（5x5） 包装:带卷 (TR) |
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