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参数资料
| 型号： | LGDS-300-0-K/T |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 封装： | ROHS COMPLIANT PACKAGE-9 |
| 文件页数： | 13/13页 |
| 文件大小： | 805K |
| 代理商： | LGDS-300-0-K/T |
For locations, phone, fax, E-Mail see back cover
9
LGDS-300 Series
Gaia Converter FC08-059.01/10 Revision D
4
Hi-Rel
Grade
10- Description of Protections
10-1 Output Over Current Protection (OCP)
The LGDS-300 provides a circuit breaker function that latches
the output off if the load current exceeds the current limit
threshold for a duration. The circuit breaker function
automatically attempts to restart power after a load current
fault at a low duty cycle to prevent the LGDS-300 from
overheating. The over current protection function protects
the module against over load of any duration and restores
the module to normal operation when the over load is
removed. It operates in hiccup mode by testing
periodically if an overload is applied (typically every 1s
recovery time). The overload detection threshold is typically
30A
with
a
detection
time
lower
than
5ms.
10-2 Inrush Current Limitation
The inrush current limitation function operates by limiting
the output voltage ramp up. It is internally set at 5V/ms
typically. The inrush current is calculated as follow.
I
inrush= C out×
dV
out
dt
where :
C
out is the capacitor value connected to the output
dV
out
dt
= 5V/ms
By adding a capacitor connected across the pins Drive &
Gi, and in order to reduce the inrush current the value
dV
out
dt
can be adjusted as follow :
10-3 Over Temperature Protection (OTP)
A thermal protection device adjusted at 120°C (+/-5%)
internal temperature with a 10°C hysteresis cycle will inhibit
the module as long as the overheat is present and restores
to normal operation automatically when overheat is
removed.
The LGDS-300 includes 3 types of protection devices.
time
recovery time
detection time
recovery time
x
100
Vo (%)
Temperature
On
120c
Off
10c
COUT
CDRIVE
VOUT
LGDS-300
+Vo
Drive
VI
Gi
1
2
3
7
8
9
4
5
C
DRIVE
is given in nF
dVout =
50
V/ms
dt
10 + C
DRIVE
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