MAX5947BESA+ Maxim Integrated Products, MAX5947BESA+ Datasheet - Page 12
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MAX5947BESA+
Manufacturer Part Number
MAX5947BESA+
Description
IC HOT SWAP CONTROL 8-SOIC
Manufacturer
Maxim Integrated Products
Type
Hot-Swap Controllerr
Datasheet
1.MAX5947BESA.pdf
(15 pages)
Specifications of MAX5947BESA+
Applications
General Purpose
Internal Switch(s)
No
Voltage - Supply
9 V ~ 80 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (0.154", 3.90mm Width)
Product
Controllers & Switches
Supply Voltage (max)
80 V
Supply Voltage (min)
9 V
Power Dissipation
470 mW
Operating Temperature Range
- 40 C to + 85 C
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Positive High-Voltage, Hot-Swap Controllers
Figure 10. Overvoltage Detection
Figure 11. Overvoltage Waveforms
12
______________________________________________________________________________________
SHORT
GND
V
PIN
IN
OVERVOLTAGE WAVEFORMS
49.9kΩ
3.4kΩ
1%
1%
R1
R2
10µs/div
1N5256B
0.68µF
30V
D1
C2
0.1µF
1
5
IN
50V/div
I
5A/div
GATE
50V/div
TIMER
10V/div
OUTPUT
50V/div
SENSE
ON
TIMER
V
CC
8
0.025Ω
R
SENSE
MAX5933B
MAX5947B
GND
SENSE
4
7
10Ω
A curve of Gate Drive vs. V
GATE is clamped to a maximum voltage of 18V above the
input voltage. At a minimum input-supply voltage of 33V,
the minimum gate drive voltage is 10V. When the input
supply voltage is higher than 20V, the gate-drive voltage
is at least 10V and a standard n-channel MOSFET can be
used. Using the MAX5947 in applications over a 9V to
20V range, a logic-level N-FET must be used with a prop-
er protection Zener diode between its gate and source
(see D1 in Figure 5).
If the MAX5933_/MAX5947_ die temperature reaches
+150°C, an overtemperature fault is generated. As a
result, GATE goes low and turns the external MOSFET off.
The MAX5933_/MAX5947_ die temperature must cool
down below +130°C before the overtemperature fault
condition is removed.
5%
R5
IRF530
GATE
Q1
6
PWRGD
FB
2
3
D2
CMPZ5248B
1kΩ
5%
R6
10nF
C1
R3
59kΩ
1%
R4
3.57kΩ
1%
CC
Thermal Shutdown
R7
24kΩ
5%
is shown in
C
L
GATE Voltage
PWRGD
Figure 13.