參數(shù)資料
型號: LTC4230CGN#TRPBF
廠商: Linear Technology
文件頁數(shù): 27/36頁
文件大?。?/td> 384K
描述: IC CONTRLLR HOT SWAP TRPL 20SSOP
標準包裝: 2,500
類型: 熱交換控制器
應(yīng)用: 通用
內(nèi)部開關(guān):
電源電壓: 1.7 V ~ 16.5 V
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 20-SSOP(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 20-SSOP
包裝: 帶卷 (TR)
27
LTC4230
 4230f
4
3
2
 1
10礎(chǔ)
FBn
R
ZX
LTC4230*
V
CCn
SENSEn
V
Z
 (TYP) = 26V
R
SENSE
V
CC
 > 15V
200礎(chǔ)
10礎(chǔ)
CHARGE
PUMP
R2
*ADDITIONAL DETAILS OMITTED FOR CLARITY
4230 F17
R1
V
OUT
LOGIC
Figure 17. Using an External Resistor to Limit
Zener Current in High V
CC
 Applications
Figure 18. Autoretry Application
HIGH SUPPLY VOLTAGE OPERATION
CONSIDERATIONS
The LTC4230 can be used with supply voltages ranging
from 1.7V to 16.5V. At high input supply voltages, the
internal charge pump produces a minimum gate drive
voltage of 7V for V
CC
 > 15V. This minimum voltage drive
is derived by an internal zener diode clamp circuit, as
shown in Figure 17. During PC board insertion or removal,
sufficient transient current may flow through this zener
diode. To limit the amount of current during transient
events, an optional small resistor between the LTC4230s
GATEn pin and the gate of the external MOSFET can be
used, as shown in Figure 17. A secondary benefit of this
component is to minimize the possibility of high frequency
parasitic oscillations in the power MOSFET.
APPLICATIO  S I FOR  ATIO
U
U
U
PCB EDGE
CONNECTOR
(MALE)
BACKPLANE
CONNECTOR
(FEMALE)
V
CC1
3.3V
LONG
V
CC2
2.5V
LONG
V
CC3
1.8V
LONG
SHORT
R
AUTO
1M
FAULT
GND
LONG
R
SENSE2
0.007&
CX2
100nF
CX1
100nF
RX2
10&
M2
IRF7413
V
CC1
GND
ON
FAULT
14
6
7
8
16
17
18
5
4
3
FB3
1
15
13
SENSE 1   GATE 1
TIMER
FILTER
V
CC2
SENSE 2   GATE 2
SENSE 3   GATE 3
V
CC3
RESET 3
2
R
SENSE3
0.007&
RX1
10&
R8
5.1k
R9
12k
M3
IRF7413
V
OUT1
3.3V
5A
V
OUT2
2.5V
5A
V
OUT3
1.8V
5A
R
SENSE1
0.007&
CX3
100nF
RX3
10&
C
TIMER
*
0.1礔
C
FILTER
**
15pF
C
AUTO
0.1礔
M1
IRF7413
Z3
Z2
Z1
* SYSTEM ON TIME: 6.2ms
**CIRCUIT BREAKER RESPONSE TIME: 19.5祍
Z1, Z2, Z3: Z1: SMAJ10
NOTE: M1 MOUNTED TO 300mm COPPER AREA
WITHOUT C
AUTO
 YIELDS 8% AND M1 CASE = 65癈
WITH C
AUTO
 = 0.1礔 YIELDS 4% and M1 CASE = 45癈
RESET 2
19
FB2
20
R7
10k
RESET 1
9
FB1
10
11
12
R10
11k
R11
12k
R6
10k
R12
18k
R13
12k
4230 F18
R5
10k
MASTER
RESET
3-INPUT
NOR GATE
礟 OR
SYSTEM LOGIC
C
OUT3
C
OUT2
C
OUT1
LTC4230
+
+
+
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