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參數資料
| 型號： | ADM1041AARQZ-REEL7 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 通信及網絡 |
| 英文描述： | Secondary-Side Controller with Current Share and Housekeeping |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PDSO24 |
| 封裝： | LEAD FREE, MO-137AE, QSOP-24 |
| 文件頁數： | 19/56頁 |
| 文件大?。?/td> | 991K |
| 代理商： | ADM1041AARQZ-REEL7 |
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ADM1041A
DIFFERENTIAL REMOTE SENSE AMPLIFIER
This amplifier senses the load voltage and is the main voltage
feedback input. A differential input is used to compensate for
the voltage drop on the negative output cable of the power
supply. An external voltage divider should be designed to set the
VS+ pin to approximately 2.0 V with respect to VS–. The
amplifier gain is 1.0. See Figure 9.
Rev. 0 | Page 19 of 56
SET LOAD VOLTAGE
The load voltage may be trimmed via the SMBus by a trim stage
at the output of the differential remote sense amplifier. The
voltage at the output of the trimmer is 1.50 V when the voltage
loop is closed. See Figure 9.
LOAD OVERVOLTAGE (OV)
A comparator at the output of the load voltage trim stage
detects load overvoltage. The load OV threshold can be
trimmed via the SMBus. The main purpose is to turn off the
OrFET when the load voltage rises to an intermediate over-
voltage level that is below the local OVP level. This circuit is
nonlatching. See Figure 9.
LOCAL VOLTAGE SENSE
This amplifier senses the output voltage of the power supply just
before the OrFET. Its input is derived from one of the pins used
for current sensing and is set to 2.0 V by an external voltage
divider. The amplifier gain is 1.3. See Figure 9.
LOCAL OVERVOLTAGE PROTECTION (OVP)
This is the main overvoltage detection for the power supply. It is
detected locally so that only the faulty power supply shuts down
in the event of an OVP condition in an N + 1 redundant power
system. This occurs only after a load OV event. The local OVP
threshold may be trimmed via the SMBus. See Figure 9.
LOCAL UNDERVOLTAGE PROTECTION (UVP)
This is the main undervoltage detection for the power supply. It
is also detected locally so that a faulty power supply can be
detected in an N+1 redundant power system. The local UVP
threshold may be trimmed via the SMBus. See Figure 9.
FALSE UV CLAMP
If a faulty power supply causes an OVP condition on the system
bus, the control loop in the good power supplies is driven to
zero output. Therefore, a clamp is required to prevent the good
power supplies from indicating an undervoltage, and to ensure
they must recover quickly after the faulty power supply has shut
down. The false UV clamp achieves this by clamping the output
voltage just above the local UVP threshold. It may be trimmed
via the SMBus. The OCPF signal disables the clamp during
overcurrent faults. See Figure 9.
FALSE UV
CLAMP
V
LS
1.25V
VOLTAGE
ERROR AMP
SOFT-
START
RAMP UP
V
1.5V
V
CMP
DIFF. VOLTAGE SENSE
CURRENT SHARE
CAPTURE
CURRENT LIMIT
LOADVOK
V
S
+
V
S
–
1.5V
SET OVP
THRESHOLD
SET UV CLAMP
THRESHOLD
SET UVP
THRESHOLD
OVP
TO
GENERAL
LOGIC
TO
GENERAL
LOGIC
UVP
SET LOAD
VOLTAGE
SET LOAD
OVERVOLTAGE
REMOTE
SENSE
FROM
LOAD
OCPF
×
1.3
35k
Ω
35k
Ω
35k
Ω
35k
Ω
21
20
2
0
NOTE:
ALL POTENTIOMETERS ( ) ARE DIGITALLY PROGRAMMABLE THROUGH REGISTERS.
1V
3V
70
μ
A
5
25k
Ω
Figure 9. Block Diagram of Voltage-Sense Amplifier
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相關代理商/技術參數 |
參數描述 |
|---|---|
| ADM1041A-EVALZ | 功能描述:BOARD EVAL FOR ADM1041A RoHS:是 類別:編程器，開發系統 >> 評估板 - DC/DC 與 AC/DC（離線）SMPS 系列:- 標準包裝:1 系列:- 主要目的:DC/DC，步降 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:3.3V 電流 - 輸出:3A 輸入電壓:4.5 V ~ 28 V 穩壓器拓撲結構:降壓 頻率 - 開關:250kHz 板類型:完全填充 已供物品:板 已用 IC / 零件:L7981 其它名稱:497-12113STEVAL-ISA094V1-ND |
| ADM1041ARQ | 功能描述:IC PWR SUPP MON/LOAD SHAR 24QSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電源控制器，監視器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 應用:多相控制器 輸入電壓:- 電源電壓:9 V ~ 14 V 電流 - 電源:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應商設備封裝:40-TQFN-EP（5x5） 包裝:帶卷 (TR) |
| ADM1041ARQ-2 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
| ADM1041ARQ-REEL | 制造商:AD 制造商全稱:Analog Devices 功能描述:Secondary-Side Controller with Current Share and Housekeeping |
| ADM1041ARQ-REEL7 | 功能描述:IC PWR SUP MON/LOAD SHARE 24QSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電源控制器，監視器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 應用:多相控制器 輸入電壓:- 電源電壓:9 V ~ 14 V 電流 - 電源:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應商設備封裝:40-TQFN-EP（5x5） 包裝:帶卷 (TR) |
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