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參數(shù)資料
| 型號(hào)： | ADM1041AARQZ-REEL |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 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(shù)： | 24/56頁 |
| 文件大?。?/td> | 991K |
| 代理商： | ADM1041AARQZ-REEL |
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ADM1041A
PULSE/AC
SENSE
2
When configured, PULSE and AC
SENSE
monitor the output of
the power main transformer. See Figure 16.
Rev. 0 | Page 24 of 56
PULSE
Providing the output of the pulse function (PULSE_OK) is
high, the FET in the OR’ing circuit can be turned on. If the
pulses stop for any reason, about 1 second later the PULSE_OK
goes low and the OrFET drive is disabled. This delay allows
passage of all expected pulse skipping modes that might occur
in no load or very light load situations. See Figure 16.
AC
SENSE
This is rarely used to measure the ac input to the supply
directly. AC
SENSE
1 or AC
SENSE
2 are usually used to measure,
indirectly, the voltage across the bulk capacitor so that the
system can be signaled that power is normal. Also if power is
actually lost, AC
SENSE
represents when just enough energy is left
for an orderly shutdown of the power supply. See Figure 16.
The ac sense function monitors the amplitude of the incoming
pulse and, if sufficiently high, generates a flag to indicate that
the ac, or strictly speaking, the voltage on the bulk capacitor, is
okay. Because the envelope of the pulse has a considerable
amount of 100 Hz ripple, hysteresis is available on this input
pin. Internally there is a 20 μA to 80 μA current sink. With a
909R external Thevenin resistance, this current range translates
to a voltage hysteresis of 200 mV to 500 mV. The internal
hysteresis current is turned off when the voltage exceeds the
reference on the comparator. This form of hysteresis allows
simple scaling to be implemented by changing the source
impedance of the pulse-conditioning circuit. Some trimming
of hysteresis and threshold voltage is provided. The ac sense
function can be configured to be derived from AC
SENSE
2 rather
than AC
SENSE
1. This allows a separate dc input from various
locations to be used to generate AC_OK for better flexibility
or accuracy.
AC_OK
1.5V
0.525V
PULSE
AC
SENSE
1
AC
SENSE
2
SELECT
AC
SENSE
5.3k
Ω
5.3k
Ω
TRIM
HYSTERESIS
PULSEOK
TO OrFET SOURCE
TO CURRENT-
SENSE RESISTOR
AND OrFET GATE
S
Q
R
S
Q
R
CLK
1 SEC
Q
R
10
9
0
CLK
1 mS
Q
R
Figure 16. Pulse In and AC
SENSE
Circuit
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| ADM1041AARQZ-REEL7 | 功能描述:IC SECONDARY SIDE CTRLR 24QSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電源控制器，監(jiān)視器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 應(yīng)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(yīng)商設(shè)備封裝:40-TQFN-EP（5x5） 包裝:帶卷 (TR) |
| ADM1041A-EVALZ | 功能描述:BOARD EVAL FOR ADM1041A RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估板 - DC/DC 與 AC/DC（離線）SMPS 系列:- 標(biāo)準(zhǔn)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(wěn)壓器拓?fù)浣Y(jié)構(gòu):降壓 頻率 - 開關(guān):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(jiān)視器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 應(yīng)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(yīng)商設(shè)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 |
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