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參數(shù)資料
| 型號(hào)： | LX1670 |
| 廠商： | Microsemi Corporation |
| 英文描述： | 5 - BIT PROGRAMMABLE VOTAGE REFERENCE |
| 中文描述： | 5 -位可編程VOTAGE參考 |
| 文件頁(yè)數(shù)： | 6/7頁(yè) |
| 文件大小： | 192K |
| 代理商： | LX1670 |
5-B
I T
P
R O G R A M M A B L E
V
OLTAGE
R
EFERENCE
LX1670
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
Copyright 1997
Rev. 1.0 7/97
6
P
R O D U C T I O N
D
A T A
S
H E E T
THEORY OF OPERATION
UNDER-VOLTAGE LOCKOUT
This function keeps order to the IC until the power supply voltage
reaches 85% of its nominal value. The output voltage is pulled low
and P
and OV
are pulled low. Once the power supply
voltage crosses 85%, the output voltage, VIDO, is released, and
P
continues to be pulled low. When V
(the
microprocessor's power supply) is within ±7% of VIDO, P
is
released. The comparator has hysteresis to prevent transient
oscillation.
4-BIT DAC and 5th-BIT SCALER
This function generates a precise voltage from a binary, 5-bit
digital word VID [0:4]. It uses a 4-bit, binary weighted current
DAC, driving a precise current to voltage converter. This voltage
is then op-amp buffered and sent out. The scaling is accomplished
by multiplexing the buffer op-amp. The resulting transfer function
is:
VIDO (D0,D1,D2,D3) =
(2.00 + 0.1*(1*D0 + 2*D1 + 4*D2 + 8*D3))
for D4 = 1
VIDO (D0,D1,D2,D3) =
(2.00 + 0.6 + 0.1*(1*D0 + 2*D1 + 4*D2 + 8*D3)) * 0.5
for D4 = 0
for the code VIDO < 1.8V will be blocked and VIDO = 0.
The zero-scale output voltage, full-scale output voltage and the
scale factor are all trimmed on-chip using fusable links.
OVER- / UNDER-VOLTAGE COMPARATORS
This function generates an open collector Power Good signal
when V
SENSE
is within ±7% of VIDO.
OVER-VOLTAGE PROTECTION
This function generates an OV
voltage signal when V
is 15%
higher than VIDO. This voltage can be used to drive an external
SCR.
CHIP ENABLE
This function disables the chip when low. VIDO, P
and OV
are all pulled low. When ENABLE is high, the chip's state is then
determined by the other functions.
BLANK ENABLE
This function will disable VIDO for codes with voltages below
1.80V when this pin is high. When pulled low, this function will
allow VIDO to accept codes for voltages of 1.30 to 3.50V.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LX1670CD | 5 - BIT PROGRAMMABLE VOTAGE REFERENCE |
| LX1670CDT | VID CONTROLLER |
| LX1681 | VOLTAGE - MODE PWM CONTROLLERS |
| LX1681CDM | VOLTAGE - MODE PWM CONTROLLERS |
| LX1682 | VOLTAGE - MODE PWM CONTROLLERS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LX1670CD | 功能描述:IC REF/MON VOLT 5BIT PROG 14SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,000 系列:- 應(yīng)用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數(shù):10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應(yīng)商設(shè)備封裝:42-WLP 包裝:帶卷 (TR) |
| LX1670CDT | 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:VID CONTROLLER |
| LX1671 | 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:Multiple Output LoadSHARE? PWM |
| LX1671 EVA KIT | 功能描述:KIT EVAL FOR SWITCHING REGULATOR 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:LoadSHARE™ 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):升壓 頻率 - 開關(guān):3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| LX1671 EVAL KIT | 制造商:Microsemi Corporation 功能描述:SWITCHING REGULATOR - Bulk |
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