GS-R400VB STMicroelectronics, GS-R400VB Datasheet - Page 3

• Manufacturer Part Number: GS-R400VB
• Manufacturer: STMicroelectronics

ELECTRICAL CHARACTERISTICS (T
* GS-R405S only
USER NOTES
Input Voltage
The recommended operating maximum DC input
voltage is 46V inclusive of the ripple voltage.
Remote Sensing
The remote voltage sense compensation range is
for a total drop of 500mV equally shared between
the load connecting wires. It is a good practice to
shield the sensing wires to avoid oscillation.
Each sense input must be connected to its compan-
ion output power pin when the remote sense capa-
bility is not used (see fig. 1).
Case Grounding
The module case is isolated from the electrical
circuit of the switching regulator. It can be grounded
using the 4 corner pins.
The PCB area below the module can be used as an
effective sixth side shield against EMI.
Symbol
V inhh
V inhl
V o / T
SVR
I inhh
V rh *
V cth
V rl *
t rd *
R th
I isc
I oL
t ss
t cb
V r
I o
f s
V o
Temperature Stability
Output Current
Current Limit
Average Input Current
Switching Frequency
Supply Voltage Rejection
Ripple Voltage
Soft Start Time
Low Inhibit Voltage
High Inhibit Voltage
High Inhibit Input Current
Crow-bar Delay Time
Reset High Level
Reset Low Level
Reset Delay Time
Crowbar Intervention Threshold
Total Remote
Sense Compensation
Thermal Resistance
Parameter
A
Case to ambient
= 25 C unless otherwise specified)
V i = V o +8V I o = 1A
V i = V o +8V
V i = V o +8V
V i = 46V Output Shorted
I o = 1A
f o = 100Hz Io =1A
I o = 2A
V i = V o +8V
V inh = 5V
I rl = 5mA
I rl = 10mA
Test Conditions
Thermal Characteristics
The case-to-ambient thermal resistance of all the
GS-R400 modules is about 5 C/W. This produces
a 50 C temperature increase of the module surface
for 10W of internal power dissipation.
Depending on the ambient temperature and/or on
the power dissipation, an additional heatsink or
forced ventilation may be required.
Input Impedance
The module has an internal capacitor connected
between the input pins in order to assure PWM
stability. This capacitor cannot handle large values
of high frequency ripple current and it can be per-
manently damaged if the primary energy source
impedance is not adequate. The use of an external
low ESR, high ripple current capacitor located as
close the module as possible is recommended.
Suitable capacitors should have a RMS current
capability of 2.5A
V
DC
and an ESR of 0,1
RMS
Min
0.2
2
with a working voltage of 50
at 100 kHz. When space
V o 1.25
0.2/1.6
25/150
10/35
4/12
Typ
100
100
0.1
5
5
5
5
GS-R400 FAMILY
Max
500
500
0.2
0.8
5.5
0.2
0.4
4
8
mv/ C
mV pp
mV/V
Unit
KHz
C/W
mV
ms
ms
A
A
A
V
V
V
V
V
A
s
3/5