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參數(shù)資料
| 型號： | MAX5949BESA |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | Dual D-type Positive-Edge-Triggered Flip-Flops With Preset And C 14-CDIP -55 to 125 |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封裝： | 0.150 INCH, MS-012AA, SOIC-8 |
| 文件頁數(shù)： | 12/18頁 |
| 文件大?。?/td> | 269K |
| 代理商： | MAX5949BESA |
M
The UV pin is also used to reset the circuit breaker after
a fault condition has occurred. The UV pin can be pulled
below V
UVL
to reset the circuit breaker.
Figure 12 shows how to program the undervoltage and
overvoltage trip thresholds using three resistors. With R4
= 549k
, R5 = 6.49k
, and R6 = 10k
, the undervoltage
threshold is set to 38.5V (with a 43V release from under-
voltage), and the overvoltage is set to 71V. The resistor-
divider also increases the hysteresis of the overvoltage
and overvoltage lockout, to 4.5V and 1.1V at the input
supply, respectively.
PWRGD
/PWRGD Output
The
PWRGD
(PWRGD) output can be used directly to
enable a power module after hot insertion. The
MAX5949A (
PWRGD
) can be used to enable modules
with an active-low enable input (Figure 14), while the
MAX5949B (PWRGD) is used to enable modules with
an active-high enable input (Figure 13).
The PWRGD signal is referenced to the DRAIN termi-
nal, which is the negative supply of the power module.
The
PWRGD
signal is referenced to V
EE
.
-48V Hot-Swap Controllers
with External R
SENSE
12
______________________________________________________________________________________
GATE
2V/div
NODE2
50V/div
1s/div
V
EE
SENSE
GATE
DRAIN
V
DD
OV
UV
PWRGD
MAX5949A
-48V RTN
-48V RTN
(SHORT PIN)
*
-48V
*DIODES INC. SMAT70A.
R4
549k
1%
R8
510k
5%
R5
6.49k
1%
R6
549k
1%
R7
1M
5%
R9
10k
1%
R1
0.02
5%
R3
1k
5%
R2
10
5%
C1
470nF
25V
C4
1
μ
F
100V
N
Q1
IRF530
D1
1N4148
Q2
2N2222
Q3
ZVN3310
C2
15nF
100V
C3
100
μ
F
100V
NODE2
Figure 11. Automatic Restart After Current Fault
V
EE
V
DD
OV
UV
MAX5949A
MAX5949B
-48V RTN
-48V
UV
= 1.255 R4 + R5 + R6
V
R4
R5
R6
-48V RTN
(SHORT PIN)
3
2
4
8
OV
= 1.255 R4 + R5 + R6
V
Figure 12. Undervoltage and Overvoltage Sensing
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5949BESA+ | 功能描述:熱插拔功率分布 48V- Hot-Swap Controller RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MAX5949BESA+T | 功能描述:熱插拔功率分布 48V- Hot-Swap Controller RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MAX5949BESA-T | 功能描述:熱插拔功率分布 RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| MAX5950ETJ | 功能描述:電壓模式 PWM 控制器 RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| MAX5950ETJ+ | 功能描述:電壓模式 PWM 控制器 12V PWM Controller w/Hot-Swap RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
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