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參數(shù)資料
| 型號(hào)： | LTC4222CG#PBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 13/32頁 |
| 文件大?。?/td> | 339K |
| 描述： | IC CTRLR DUAL HOT SWAP 36-SSOP |
| 標(biāo)準(zhǔn)包裝： | 37 |
| 類型： | 熱交換控制器 |
| 應(yīng)用： | 通用 |
| 內(nèi)部開關(guān)： | 無 |
| 電源電壓： | 2.9 V ~ 29 V |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 36-SSOP（0.209"，5.30mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 36-SSOP |
| 包裝： | 管件 |
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LTC4222
13
4222fb
Figure 1. Typical Application
A MOSFET is turned on by charging up the GATE with a
12礎(chǔ) current source. When the GATE voltage reaches the
MOSFET threshold voltage, the MOSFET begins to turn on
and the SOURCE voltage then follows the GATE voltage
as it increases.
While the MOSFET is turning on, the inrush current in-
creases linearly at a dI/dt rate selected by capacitor C
SS
.
This is accomplished using the current limit amplifier
controlling the GATE pin voltage. Once the inrush current
reaches the limit set by the FB pin, the dI/dt ramp stops and
the inrush current follows the foldback profile as shown
in Figure 2. When both channels turn on simultaneously,
the foldback current limit is set by the lower of the two
FB pins.
A start-up timer is used to prevent damaging the MOSFET
when starting up into a short-circuit. The TIMER capacitor
integrates at 100礎(chǔ) during start-up and once the TIMER
pin reaches threshold of 1.235V , the part checks to see if
it is in current limit. If this is the case, the overcurrent fault
bit, FAULT bit 2 in Table 6, is set and the part turns off. If
the part is not in current limit, the 50mV circuit breaker is
armed and the current limit is switched to 150mV . Alter-
nately an internal 100ms start-up timer may be selected
by tying the TIMER pin to INTV
CC
.
As the SOURCE voltage rises, the FB pin voltage follows as
set by R7 and R8. Once FB crosses its 1.235V threshold,
and the start-up timer has expired, the corresponding GPIO
pin, in the default power good configuration, ceases to
pull low and indicates that power is now good. Alternately
STATUS bit 3 can be read to check power-good status,
where a zero indicates that power is good.
If a series resistor and capacitor from GATE to GROUND
(R6 and C1) are employed to provide a constant inrush
current during start-up, which provides a constant dV/dt at
UV1 V
DD1
LTC4222
GATE1
INTV
CC
ADR2
ADR1
NC
ADR0
CONFIG
SOURCE1
UV2 V
DD2
GATE2
SOURCE2
OV1
OV2
ALERT
SCL
SDA
ON
FB1
ADIN1
TIMER
GPIO1
EN1
SS
PLUG-IN
CARD
R5-1
10
R
G1
15k
C
G1
3.9nF
C
TIMER
0.68礔
C
SS
68nF
R
S1
0.01
Q1
FDD3706
R71
10.2k
R81
3.57k
R41
100k
4222 TA01a
C
F1
0.1礔
R11
140k
R21
4.53k
R31
13.7k
Z1
SA14A
BACKPLANE
GND
GND
ALERT
SCL
ON
SDA
V
IN1
12V
ADIN2
FB2
GPIO2
EN2
C3
0.1礔
R5-2
10
R
G2
15k
C
G2
3.9nF
R
S2
0.01
Q2
FDD3706
R72
4.99k
R82
3.57k
R42
100k
C
F2
0.1礔
R12
23.7k
R22
3.32k
R32
13.7k
Z2
SA14A
V
IN2
3.3V
SENSE1
SENSE2
APPLICATIONS INFORMATION
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| LTC4222CG-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual Hot Swap Controller with I2C Compatible Monitoring |
| LTC4222CUH#PBF | 功能描述:IC CTRLR DUAL HOT SWAP 32-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:119 系列:- 類型:熱交換控制器 應(yīng)用:通用型，PCI Express? 內(nèi)部開關(guān):無 電流限制:- 電源電壓:3.3V，12V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:80-TQFP 供應(yīng)商設(shè)備封裝:80-TQFP（12x12） 包裝:托盤 產(chǎn)品目錄頁面:1423 (CN2011-ZH PDF) |
| LTC4222CUH#TRPBF | 功能描述:IC CTRLR DUAL HOT SWAP 32-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:119 系列:- 類型:熱交換控制器 應(yīng)用:通用型，PCI Express? 內(nèi)部開關(guān):無 電流限制:- 電源電壓:3.3V，12V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:80-TQFP 供應(yīng)商設(shè)備封裝:80-TQFP（12x12） 包裝:托盤 產(chǎn)品目錄頁面:1423 (CN2011-ZH PDF) |
| LTC4222CUH-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual Hot Swap Controller with I2C Compatible Monitoring |
| LTC4222CUH-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual Hot Swap Controller with I2C Compatible Monitoring |
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