MAX5949BESA+T Maxim Integrated Products, MAX5949BESA+T Datasheet - Page 16

• Manufacturer Part Number: MAX5949BESA+T
• Description: IC CNTRLR HOT SWAP 8-SOIC
• Manufacturer: Maxim Integrated Products
• Type: Hot-Swap Controllerr

Specifications of MAX5949BESA+T

• Applications: General Purpose
• Internal Switch(s): No
• Voltage - Supply: -20 V ~ -80 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

If I
bles to ≤1.25V. If C
voltage is ∆36V, and the 5A charging-current pulse is:
Entering the data sheet transient-thermal-resistance
curves at 1ms provides a θ
so ∆t
Example 2:
I
but R
R
Power dissipation is 9.6W at +25°C or 14.4W at +80°C.
Junction-to-case thermal resistance is 1.9W/°C, so the
junction-temperature rise would be approximately 5°C
above the +25°C case temperature. For higher efficien-
cy, consider IRL540NS with R
allows η = 99%, P
1.1°C/W) at +25°C.
Thermal calculations for the transient condition yield
I
0.12°C/W, P
-48V Hot-Swap Controllers
with External R
16
LOAD
CB
DS(ON)
CB
= 20A, V
JC
______________________________________________________________________________________
is set to twice I
DS(ON)
= 10A, efficiency = 98%, allowing V
= 5.6°C. Clearly, this is not a problem.
≤ 90mΩ at +25°C and ≤ 135mΩ at +80°C.
D
MAX5949AESA
MAX5949BESA
t
≤ 96mΩ. An IRF530 in a D
= 36W and ∆t
DS
=
PART
= 1.8V, t = 0.5ms, transient θ
4000
D
OUT
LOAD
≤ 4.4W, and T
µ
F x
5
= 4000µF, transient-line input
, or 5A, V
A
JC
JC
1 25
.
= 4.3°C.
= 0.9°C/W. P
DS(ON)
V
DS
=
JC
SENSE
momentarily dou-
1
ms
= +4°C (θ
≤ 44mΩ. This
2
PAK exhibits
DS
D
= 6.25W,
= 0.96V
Active high (PWRGD)
PWRGD POLARITY
Active low (PWRGD)
JC
JC
=
=
Figure 16. Recommended Layout for Kelvin-Sensing Current
Through Sense Resistor
MAX5949A
MAX5949B
HIGH-CURRENT PATH
SENSE V
FAULT MANAGEMENT
EE
Selector Guide
Latched
Latched
SENSE RESISTOR