- 您現(xiàn)在的位置：買賣IC網(wǎng) > Datasheet目錄45 > MIC2595R-2BM TR (Micrel Inc)IC CTRLR HOT SWAP NEG HV 14-SOIC Datasheet資料下載
參數(shù)資料
| 型號(hào)： | MIC2595R-2BM TR |
| 廠商： | Micrel Inc |
| 文件頁數(shù)： | 18/29頁 |
| 文件大?。?/td> | 4205K |
| 描述： | IC CTRLR HOT SWAP NEG HV 14-SOIC |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 類型： | 熱交換控制器 |
| 應(yīng)用： | 通用 |
| 內(nèi)部開關(guān)： | 無 |
| 電源電壓： | -19 V ~ -80 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 14-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 14-SOIC |
| 包裝： | 帶卷 (TR) |
| 其它名稱： | MIC2595R-2BMTR MIC2595R-2BMTR-ND |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁當(dāng)前第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁
Micrel
MIC2589/MIC2595
December 2005
18
M9999-120505
(408) 955-1690
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
=
CNLD
NLD
CNLD
NLD
I
C
V
t
where V
CNLD
= 1.24V (typ); I
CNLD
= 25礎(chǔ) (typ); and
C
NLD
is an external capacitor connected from Pin 6 to
VEE. Once the voltage on CNLD reaches its no-load
threshold voltage, V
CNLD
, the loop times out and the
controller will shut down until it is reset manually
(MIC2589/MIC2595) or until it performs an auto-retry
operation (MIC2589R/MIC2595R). During start-up, the
no-load detection circuit begins to monitor the load
current and the CNLD pin starts ramping along with
the GATE output. In order to keep the output from
shutting down, t
NLD
must be long enough to ensure
that the output MOSFET switches on to deliver the
required minimum load-detect current to the output
load before the no-load timer times out.
The Power-Good Output Signals
For
the
MIC2589/MIC2595-1
and
MIC2589R/MIC2595R-1, power-good output signal
PWRGD1 will be high impedance when V
DRAIN
drops
below V
PGTH
, and will pull-down to the potential at the
DRAIN when V
DRAIN
is above V
PGTH
. For the
MIC2589/95-2 and the MIC2589R/95R-2, power-good
output signal /PWRGD1 will pull down to the potential
of the DRAIN pin when V
DRAIN
drops below V
PGTH
and
will be high impedance when V
DRAIN
is above V
PGTH
.
Hence, the -1 parts have an active-high PWRGDX
signal and the -2 parts have an active-low /PWRGDX
output. PWRGDX (or /PWRGDX) may be used as an
enable signal for one or more following DC/DC
converter modules or for other system uses as
desired. When used as an enable signal, the time
necessary for the PWRGD (or /PWRGD) signal to
pull-up (when in high impedance state) will depend
upon the load (RC) that is present on this output.
Power-good output signals PWRGD2 (/PWRGD2) and
PWRGD3 (/PWRGD3) follow the assertion of
PWRGD1 (/PWRGD1) with a sequencing delay set by
an external capacitor (C
PG
) from the controllers
PGTIMER pin (Pin 2) to VEE. An expression for the
sequencing delay between PWRGD2 and PWRGD1
is given by:
PGTIMER
PG
)
THRESH(PG2
1
PGDLY2
I
C
V
t
?/DIV>
=
where VTHRESH(PG2) (= 0.63V, typically) is the
PWRGD2 threshold voltage for PGTIMER and I
PGTIMER
(= 45礎(chǔ), typically) is the internal PGTIMER charge
current. Similarly, an expression for the sequencing
delay between PWRGD3 and PWRGD2 is given by:
PGTIMER
PG
)
THRESH(PG2
)
THRESH(PG3
2
PGDLY3
I
C
V
V
t
?/DIV>
=
where V
THRESH(PG3)
(1.15V, typical) is the PWRGD3
threshold voltage for PGTIMER. Therefore, power-
good output signal PWRGD2 (/PWRGD2) will be
delayed after the assertion of PWRGD1 (/PWRGD1)
by:
t
PGDLY2-1
(ms) 14 ?C
PG
(礔)
Power-good output signal PWRGD3 (/PWRGD3)
follows the assertion of PWRGD2 by a delay:
t
PGDLY3-2
(ms) 11.5 ?C
PG
(礔)
For example, for a 10礔 value for C
PG
, power-good
output signal PWRGD2 will be asserted 140ms after
PWRGD1. Power-good signal PWRGD3 will then be
asserted 115ms after
PWRGD2 and 255ms after
the
assertion of PWRGD1. The relationships between
V
DRAIN
, V
PGTH
, PWRGD1, PWRGD2, and PWRGD3
are shown in Figure 6.
Undervoltage/Overvoltage Detection (MIC2589 and
MIC2589R)
The MIC2589 and the MIC2589R have UV and OV
input pins that can be used to detect input supply rail
undervoltage
and
overvoltage
conditions.
Undervoltage lockout prevents the output from
switching on until the supply input is stable and within
tolerance. In a similar fashion, overvoltage shutdown
prevents damage to sensitive circuit components
should the input voltage exceed normal operating
limits. Each of these pins is internally connected to
analog comparators with 20mV of hysteresis. When
the UV pin falls below its V
UVL
threshold or the OV pin
is above its V
OVH
threshold, the GATE pin is
immediately pulled low. The GATE pin will be held low
until the UV pin is above its V
UVH
threshold and the OV
pin is below its V
OVL
threshold. The circuits UV and
OV threshold voltage levels are programmed using
the resistor divider R1, R2, and R3 as shown in the
Typical Application circuit and the equations to set
the trip points are shown below. The circuits UV
threshold is set to V
UV
= 37V and the OV threshold is
set at V
OV
= 72V, values commonly used in Central
Office power distribution applications.
)
(
)
(
)
R3
R3
R2
R1
(typ)
V
V
R3
R2
R3
R2
R1
(typ)
V
V
OVL
OV
UVL
UV
+
+
?/DIV>
=
+
+
+
?/DIV>
=
Given V
UV
, V
OV
, and any one of the resistor values,
the remaining two resistor values can be determined.
A suggested value for R3 is selected to provide
approximately 100礎(chǔ) (or more) of current through the
voltage divider chain at V
DD
= V
UV
. This yields the
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MIC280-7BM6 TR | IC SUPERVISOR THERMAL SOT23-6 |
| MIC2800-GFSYML TR | IC REG TRPL BUCK/LINEAR 16MLF |
| MIC281-7BM6 TR | IC SUPERVISOR THERMAL SOT23-6 |
| MIC2810-1JGMYML TR | IC REG TRPL BUCK/LINEAR 16MLF |
| MIC284-2BMM TR | IC SUPERVISOR THERM 2ZONE 8-MSOP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC2595R-2YM | 功能描述:熱插拔功率分布 Negative Voltage Hot-Swap Controller - Lead Free RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MIC2595R-2YM TR | 功能描述:熱插拔功率分布 Negative Voltage Hot-Swap Controller - Lead Free RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MIC2595R-2YM-TR | 功能描述:Hot Swap Controller, Sequencer 1 Channel -48V 14-SOIC 制造商:microchip technology 系列:- 包裝:剪切帶（CT） 零件狀態(tài):停產(chǎn) 類型:熱交換控制器，序列發(fā)生器 通道數(shù):1 內(nèi)部開關(guān):無 應(yīng)用:-48V 特性:自動(dòng)重試 可編程特性:限流，故障超時(shí)，UVLO 電壓 - 電源:-80 V ~ -19 V 電流 - 輸出（最大值）:- 工作溫度:-40°C ~ 85°C 電流 - 電源:4mA 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應(yīng)商器件封裝:14-SOIC 功能引腳:CFILTER，CNLD，DRAIN，PGTIMER，OFF，ON，/PWRGD1，/PWRGD2，/PWRGD3 標(biāo)準(zhǔn)包裝:1 |
| MIC2596-1BTS | 功能描述:IC SWITCH HOT SWAP DUAL 20-TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:100 系列:- 類型:熱插拔開關(guān) 應(yīng)用:通用 內(nèi)部開關(guān):是 電流限制:可調(diào) 電源電壓:9 V ~ 13.2 V 工作溫度:-40°C ~ 150°C 安裝類型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-TDFN-EP（3x3） 包裝:管件 |
| MIC2596-1BTS TR | 功能描述:IC SWITCH HOT SWAP DUAL 20-TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:100 系列:- 類型:熱插拔開關(guān) 應(yīng)用:通用 內(nèi)部開關(guān):是 電流限制:可調(diào) 電源電壓:9 V ~ 13.2 V 工作溫度:-40°C ~ 150°C 安裝類型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-TDFN-EP（3x3） 包裝:管件 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。