-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
相关PDF资料
MAX5949BESA+T IC CNTRLR HOT SWAP 8-SOIC
MAX5950ETJ+ IC PWM CTRL HOT-SW 12V 32TQFN-EP
MAX5952CUAX+ IC PSE CNTRLR FOR POE 36-SSOP
MAX5953DUTM+ IC INTERFACE 802.3AF 48TQFN
MAX5954LETX+T IC PCI EXP/HOT-PLUG CTRLR 36TQFN
MAX5955BEEE+ IC DUAL HOT-SWAP CTRLR 16-QSOP
MAX5957AETN+T IC TRPL PCI EXP/HOT-PLUG 56-TQFN
MAX5960AECS+T IC CTRLR HOT-PLUG QD 80-TQFP
相关代理商/技术参数
MAX5948BESA-T 功能描述:热插拔功率分布 RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube
MAX5949AESA 功能描述:热插拔功率分布 RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube
MAX5949AESA+ 功能描述:热插拔功率分布 48V- Hot-Swap Controller RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube
MAX5949AESA+T 功能描述:热插拔功率分布 48V- Hot-Swap Controller RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube
MAX5949AESA+TG126 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:
MAX5949AESA-T 功能描述:热插拔功率分布 RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube
MAX5949BESA 功能描述:热插拔功率分布 RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube
MAX5949BESA+ 功能描述:热插拔功率分布 48V- Hot-Swap Controller RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube