參數資料
型號: MAX5948BESA+T
廠商: Maxim Integrated
文件頁數: 9/18頁
文件大?。?/td> 182K
描述: IC CNTRLR HOT SWAP 8-SOIC
產品培訓模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
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: -20 V ~ -80 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 8-SOIC(0.154",3.90mm 寬)
供應商設備封裝: 8-SOIC
包裝: 帶卷 (TR)
-48V Hot-Swap Controllers
with External R
SENSE
_______________________________________________________________________________________   9
Electronic Circuit Breaker
The MAX5948 provides a circuit-breaker feature that
protects against excessive load current and short-cir-
cuit conditions. The load current is monitored by sens-
ing the voltage across an external sense resistor
connected between V
EE
and SENSE.
If the voltage between V
EE
and SENSE exceeds the
current-limit trip voltage (V
CB
) for a period of
t
PHLSENSE
, the electronic circuit breaker will trip, caus-
ing the MAX5948A/MAX5948B to turn off the external
MOSFET as shown in Figure 8.
After an overcurrent fault condition, the circuit breaker
can be reset by pulling the UV pin low and then pulling
UV high or by cycling power to the MAX5948A/
MAX5948B.
V
EE
SENSE
GATE
DRAIN
V
DD
OV
UV
PWRGD
MAX5948B
-48V RTN
-48V
R4
562k&
1%
R5
9.09k&
1%
R6
10k&
1%
R1
0.02&
5%
R3
18k&
5%
R2
10&
5%
C1
150nF
25V
Q1
IRF530
C2
3.3nF
100V
GATE IN
VICOR
VI-J3D-CY
V
IN+
V
IN-
C4
100礔
100V
C3
0.1礔
100V
*
-48V RTN
(SHORT PIN)
*DIODES INC. SMAT70A.
Figure 7a. Inrush Control Circuitry
GATE - V
EE
10V/div
V
EE
50V/div
DRAIN
50V/div
INRUSH
CURRENT
1A/div
4ms/div
CONTACT
BOUNCE
Figure 7b. Input Inrush Current
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