參數(shù)資料
型號(hào)： LTC4210-2
廠商： Linear Technology Corporation
元件分類： 基準(zhǔn)電壓源/電流源
英文描述： Hot Swap Controller in 6-Lead SOT-23 Package
中文描述： 熱插拔控制器的6引腳SOT - 23封裝
文件頁(yè)數(shù)： 10/20頁(yè)
文件大?。?/td> 246K
代理商： LTC4210-2
10
LTC4210-1/LTC4210-2
421012f
parasitic oscillations frequently associated with the power
MOSFET. In some applications, the user may find that R
G
helps in short-circuit transient recovery as well. However,
too large of an R
G
value will slow down the turn-off time.
The recommended R
G
range is between 5
and 500
.
Usually, method 2 is preferred when the input supply volt-
age is greater than 10V. R
G
limits the current flow into the
GATE pin’s internal zener clamp during transient events.
The recommended R
C
and C
C
values are the same as
method 1. The parasitic compensation capacitor C
P
is
required when 0.2
μ
F < load capacitance C
L
< 9
μ
F, other-
wise it is optional.
Parasitic MOSFET Oscillation
There are two possible parasitic oscillations when the
MOSFET operates as a source follower when ramping at
power-up or during current limiting. The first type of os-
cillation occurs at high frequencies, typically above 1MHz.
This high frequency oscillation is easily damped with R
G
as
mentioned in method 2.
The second type of oscillation occurs at frequencies be-
tween 200kHz and 800kHz due to the load capacitance
being between 0.2
μ
F and 9
μ
F, the presence of R
G
and R
C
resistance, the absence of a drain bypass capacitor, a com-
bination of bus wiring inductance and bus supply output
impedance. There are several ways to prevent this second
type of oscillation. The simplest way is to avoid load ca-
pacitance below 10
μ
F, the second choice is connecting an
external C
P
> 1.5nF.
APPLICATIOU
If a 7m
sense resistor with
±
1% tolerance is used for
current limiting, the nominal current limit is 7.14A. From
Equations 2 and 3, I
LIMIT(MIN)
= 6.22A and I
LIMIT(MAX)
=
8.08A. For proper operation, the minimum current limit
must exceed the circuit maximum operating load current
with margin. The sense resistor power rating must exceed
V
CB(MAX)2
/R
SENSE(MIN)
.
W
U
U
V
CC
SENSE
R
0.007
Q1
Si4410DY
Q1
Si4410DY
V
IN
5V
*ADDITIONAL DETAILS
OMITTED FOR CLARITY
**USE C
IF 0.2
μ
F < C
< 9
μ
F,
OTHERWISE NOT REQUIRED
6
5
C
L
4
R
C
100
C
10nF
GATE
LTC4210*
(2a)
Method 1
V
CC
SENSE
R
0.007
R
G
200
C
**
2.2nF
V
IN
12V
V
OUT
V
OUT
6
5
4
R
C
100
C
10nF
4210 F02
GATE
LTC4210*
(2b)
Method 2
+
C
L
+
Figure 2. Frequency Compensation
Frequency Compensation
A compensation circuit should be connected to the GATE
pin for current limit loop stability.
Method 1
The simplest frequency compensation network consists
of R
C
and C
C
(Figure 2a). The total GATE capacitance is:
C
GATE
= C
ISS
+ C
C
Generally, the compensation value in Figure 2a is suffi-
cient for a pair of input wires less than a foot in length.
Applications with longer input wires may require the R
C
or
C
C
value to be increased for better fault transient perfor-
mance. For a pair of three foot input wires, users can start
with C
C
= 47nF and R
C
= 100
. Despite the wire length, the
general rule for AC stability required is C
C
≥
8nF and R
C
≤
1k
.
(4)
Method 2
The compensation network in Figure 2b is similar to the
circuitry used in method 1 but with an additional gate re-
sistor R
G
. The R
G
resistor helps to minimize high frequency
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC4210-2CS6 制造商:Linear Technology 功能描述:Hot Swap Controller 1-CH 16.5V 6-Pin TSOT-23
LTC4210-2CS6#PBF 制造商:Linear Technology 功能描述:HOT SWAP CONTROLLER, 2.7V TO 16.5V, TSOT-23-6; Controller Applications:Electronic Circuit Breaker, Hot Board Insertion/Removal, Industrial High Side Switch/Circuit Breaker; Internal Switch:Yes; Supply Voltage Min:2.7V; No. of Pins:6 ;RoHS Compliant: Yes
LTC4210-2CS6#TR 功能描述:IC CONTROLLER HOT SWAP TSOT23-6 RoHS:否 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 類型:熱交換控制器 應(yīng)用:-48V 遠(yuǎn)程電力系統(tǒng)，AdvancedTCA ? 系統(tǒng)，高可用性 內(nèi)部開(kāi)關(guān):無(wú) 電流限制:可調(diào) 電源電壓:11.5 V ~ 14.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件
LTC4210-2CS6#TRM 功能描述:IC CONTROLLER HOT SWAP TSOT23-6 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(kāi)關(guān) 應(yīng)用:通用 內(nèi)部開(kāi)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
LTC4210-2CS6#TRMPBF 功能描述:IC CONTROLLER HOT SWAP TSOT23-6 RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 類型:熱交換控制器 應(yīng)用:-48V 遠(yuǎn)程電力系統(tǒng)，AdvancedTCA ? 系統(tǒng)，高可用性 內(nèi)部開(kāi)關(guān):無(wú) 電流限制:可調(diào) 電源電壓:11.5 V ~ 14.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件
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