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參數資料
型號: LTC4253ACGN#TRPBF
廠商: Linear Technology
文件頁數: 32/34頁
文件大小: 383K
描述: IC HOT SWAP CONTRLR -48V 16-SSOP
標準包裝: 2,500
類型: 熱交換控制器
應用: 通用
內部開關:
電源電壓: 8.2 V ~ 14.5 V
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 16-SSOP(0.154",3.90mm 寬)
供應商設備封裝: 16-SSOP
包裝: 帶卷 (TR)
LTC4253/LTC4253A
32
425353aff
For more information www.linear.com/4253
GN Package
16-Lead Plastic SSOP (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1641)
APPLICATIONS INFORMATION
The peak power at the fault current limit occurs at the supply
overvoltage threshold. The fault current limited power is:
 
OWER(FAULT)=
V
SUPPLY
(
)
R
S
V
ACL
(V
SUPPLY
 V
Z
)
R4
R3
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
 
(18)
Circuit Breaker with Foldback Current Limit
Figure 17 shows the LTC4253A in a foldback current limit
application. When V
OUT
 is shorted to the 48V RTN supply,
current flows through resistors R3 and R4. This results in
a voltage drop across R4 and a corresponding reduction
in voltage drop across the sense resistor, R
S
, as the ACL
amplifier servos the sense voltage between the SENSE and
V
EE
 pins to about 60mV . The short-circuit current through
RS reduces as the V
OUT
 voltage increases during an output
short-circuit condition. Without foldback current limiting
resistor R4, the current is limited to 3A during analog
current limit. With R4, the short-circuit current is limited
to 0.5A when V
OUT
 is shorted to 71V .
PACKAGE DESCRIPTION
Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.
GN16 (SSOP) 0204
1  2  3  4   5  6  7  8
.229  .244
(5.817  6.198)
  .150  .157**
(3.810  3.988)
16 15 14 13
  .189  .196*
(4.801  4.978)
12 11 10 9
.016  .050
(0.406  1.270)
 .015 ?004
(0.38 ?.10)
?45?/DIV>
0? 8?TYP
.007  .0098
(0.178  0.249)
.0532  .0688
(1.35  1.75)
.008  .012
(0.203  0.305)
TYP
.004  .0098
(0.102  0.249)
.0250
(0.635)
BSC
.009
(0.229)
REF
.254 MIN
RECOMMENDED SOLDER PAD LAYOUT
.150  .165
.0250 BSC
.0165 ?0015
.045 ?005
  * DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
  SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
  FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
INCHES
(MILLIMETERS)
NOTE:
1. CONTROLLING DIMENSION: INCHES
2. DIMENSIONS ARE IN
3. DRAWING NOT TO SCALE
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