參數(shù)資料
型號(hào)： LTC4221
廠商： Linear Technology Corporation
元件分類： 基準(zhǔn)電壓源/電流源
英文描述： Dual Hot Swap Controller/ Power Sequencer with Dual Speed, Dual Level Fault Protection
中文描述： 雙熱插拔控制器/電源與雙速序列，雙級故障保護(hù)
文件頁數(shù)： 8/28頁
文件大?。?/td> 311K
代理商： LTC4221
8
LTC4221
4221f
PU
ON1
(Pin 1):
System/Channel 1 On Input. Both GATE pins
are pulled low by internal 100
μ
A pull-downs and the
FAULT latch is reset when V
ON1
< 0.4V. When 0.425V <
V
ON1
< 0.821V, the FAULT latch is released from reset.
When V
ON1
> 0.851V, GATE1 ramps up after an initial
timing cycle.
V
CC1
(Pin 2):
Channel 1 Positive Supply Input. It powers
all the internal circuitry. V
CC1
can range from 2.7V to 13.5V
for normal operation but it must be
≥
V
CC2
. An undervolt-
age lockout circuit disables both channels whenever the
voltage at V
CC1
is less than 2.5V.
SENSE1
(Pin 3):
Channel 1 Current Sense Input. A sense
resistor R
SENSE1
is placed in the supply path between V
CC1
and SENSE1 to sense channel 1 load current. If V
RSENSE1
exceeds 100mV for more than 1
μ
s or 25mV for an adjust-
able time (set by the C
FILTER
), the FAULT latch is set and
fast pull-down circuits are triggered to discharge both
GATEs
low. During the start-up cycle, GATE1
ramp-up is
controlled to servo V
RSENSE1
≤
V
SENSE(ACL)
. V
SENSE(ACL)
increases from 9mV to 25mV as V
FB1
ramps from 0V to
0.5V. To disable the current limit and circuit breaker
function for channel 1, tie SENSE1 to V
CC1
.
GATE1 (Pin 4):
Channel 1 Gate Drive. This pin is the high
side gate drive of an external N-channel MOSFET. When
V
ON1
< 0.821V, GATE1 is held low by a 100
μ
A current
source. When V
ON1
> 0.851V, an initial timing cycle is
followed by a start-up cycle when an internal charge pump
provides a 9.5
μ
A pull-up to ramp up GATE1 with inrush
current limiting. UVLO, overvoltage, overcurrent and ex-
ternally generated faults override the ON1 pin and pull
GATE1 low.
FB1
(Pin 5):
V
OUT1
Feedback Input. FB1
monitors the
channel 1 output voltage with an external resistive divider.
When V
FB1
< 0.617V, the PWRGD1
pin is pulled low. When
V
FB1
> 0.822V, overvoltage is detected, the FAULT latch is
set and both GATEs are pulled low. The FB1
pin is also used
to control the channel 1 current limit during its start-up
cycle.
PWRGD1 (Pin 6):
Channel 1 Power Good Output. PWRGD1
is pulled low when V
FB1
< 0.617V, during the initial timing
cycle or when the chip is in UVLO. An external pull-up is
required to generate a logic high at the open-drain PWRGD1
pin.
TYPICAL PERFOR U
V
PWRGD(OL)
/V
FAULT(OL)
vs Temperature
tp
(SC-FAULT)
vs Temperature
TEMPERATURE (
°
C)
–50
V
O
0.500
0.450
0.400
0.350
0.300
0.250
0.200
0.150
0.100
0.050
0
0
50
75
4221 G37
–25
25
100
125
V
CC1
= 2.7V
V
CC1
= 5V
V
CC1
= 13.5V
V
CC2
= 1V, I
PWRGD
/I
FAULT
= 1.6mA
TEMPERATURE (
°
C)
–50
t
(
16
17
18
25
75
4221 G38
15
14
–25
0
50
100
125
13
12
V
CC1
= 2.7V
V
CC1
= 5V
V
CC1
= 13.5V
V
= 1V
TIMER = 0.5V
TEMPERATURE (
°
C)
–50
t
(
1.4
1.6
1.8
25
75
4221 G39
1.2
1.0
–25
0
50
100
125
0.8
0.6
V
CC1
= 2.7V
V
CC1
= 5V
V
CC1
= 13.5V
V
= 1V
TIMER = 0.5V
tp
(FC-GATE)
vs Temperature
相關(guān)PDF資料
PDF描述
LTC4240 CompactPCI Hot Swap Controller with I2C Compatible Interface
LTC4240IGN CompactPCI Hot Swap Controller with I2C Compatible Interface
LTC4240CGN CompactPCI Hot Swap Controller with I2C Compatible Interface
LTC4244 Rugged, CompactPCI Bus Hot Swap Controllers
LTC4244CGN-1 Rugged, CompactPCI Bus Hot Swap Controllers
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC4221CGN 功能描述:IC CTRLR HOTSWAP DUAL 16SSOP 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
LTC4221CGN#PBF 功能描述:IC CTLR HOT SWAP DUAL 16SSOP RoHS:是 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
LTC4221CGN#TR 功能描述:IC CTRLR HOTSWAP DUAL 16SSOP 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
LTC4221CGN#TRPBF 功能描述:IC CTRLR HOTSWAP DUAL 16SSOP RoHS:是 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
LTC4221IGN 功能描述:IC CTRLR HOTSWAP DUAL 16SSOP 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)。

采購需求

(若只采購一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購

我的聯(lián)系方式

*
*
*