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| 型号： | MAX5043ETN+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 19/22页 |
| 文件大小： | 0K |
| 描述： | IC PWR W/MOSFET HS 56-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 系列： | * |
Two-Switch Power ICs with Integrated
Power MOSFETs and Hot-Swap Controller
Determining Hot-Swap Inrush Current
Calculate the hot-swap inrush current using the follow-
ing formula:
Table 1. MAX5042 Suggested External
Hot-Swap MOSFETs
I C IN = C IN
dV HSDRAIN
dt
= C IN S HSLR
MAXIMUM I LOAD (A)
0.25
0.5
SUGGESTED EXTERNAL MOSFET
IRFL110
IRFL4310
where:
C IN = the load capacitance,
S HSLR is the MAX5042 hot-swap slew rate magnitude
given in the Electrical Characteristics table.
1
2
3
4
IRFR3910
IRF540NS
IRF1310NS
IRF1310NS
For example, assuming an input bulk capacitance of
100μF, and using the typical value of 10V/ms for the
slew rate, the calculated inrush current is 1A. See Table
1 for suggested external hot-swap MOSFETs.
Typical Application Circuits
V IN+
32V TO 72V
C1
220 μ F
100V
C30
0.68 μ F
100V
R12
200k ?
1%
C3
1 μ F
R13
1M ?
C25
0.22 μ F
R22
10k ?
RAMP
RCFF
REG9
DRVIN
FLTINT
DRVDEL
SYNC
PWMSD
POSINPWM
DRNH
UVLO
U1
MAX5042
BST
XFRMRH
XFRMRL
REG15
CSP, SRC
C6
0.1 μ F
R9
15 ?
C7
1 μ F
D4
D1
D2
T1
D3
R11
20 ?
1%
C16
0.001 μ F
C5
0.0047 μ F
L1
4.4 μ H
C17
150 μ F
6.3V
C18
150 μ F
6.3V
C4
0.1 μ F
5V
8A
SGND
C9 C12
220pF 0.1 μ F
R14
10k ?
R20
10k ?
REG5
RCOSC HSEN CSS
NEGIN HSGATE
PWMNEG,
HSDRAIN CSN PWMPNEG OPTO
R4
10 ?
R15
24.9k ?
1%
C13
C14
C11
0.1 μ F
R10
33m ?
1%
1 μ F
100pF
C19
0.15 μ F
R3
150 ?
1%
R1
25.5k ?
1%
NEGIN
C20
0.1 μ F
100V
N1
(HOT-SWAP MOSFET)
R21
1.24k ?
1%
C8
0.33 μ F
R6
200 ?
1%
E
U2
FOD2712
LED
FB
COMP
C15
0.1 μ F
R2
8.25k ?
1%
C
GND
R5
10 ?
1%
Figure 7. MAX5042 Typical Application Circuit (48V Power Supply with Hot-Swap Capability)
______________________________________________________________________________________
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