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参数资料
| 型号： | PMN5118USR |
| 厂商： | ERICSSON POWER MODULES AB |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 108 W DC-DC REG PWR SUPPLY MODULE |
| 封装： | ROHS COMPLIANT, SMD-14 |
| 文件页数： | 25/37页 |
| 文件大小： | 1906K |
| 代理商： | PMN5118USR |
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Ericsson Internal
PRODUCT SPECIFICATION
6 (8)
Prepared (also subject responsible if other)
No.
EYIPYAN
3/1301-BMR656 5118 Uen
Approved
Checked
Date
Rev
Reference
SEC/D (Julia You)
EQUENXU
2007-7-9
B
Thermal Consideration continued
Definition of reference temperature (Tref)
The reference temperature is used to monitor the temperature
limits of the product. Temperatures above maximum Tref are
not allowed and may cause degradation or permanent
damage to the product. Tref is also used to define the
temperature range for normal operating conditions.
Tref is defined by the design and used to guarantee safety
margins, proper operation and high reliability of the module.
Ambient Temperature Calculation
By using the thermal resistance the maximum allowed
ambient temperature can be calculated.
1. The power loss is calculated by using the formula
((1/η) - 1) × output power = power losses (Pd).
η = efficiency of regulator. E.g 89.5 % = 0.895
2. Find the thermal resistance (Rth) in the Thermal Resistance
graph found in the Output section for each model.
Calculate the temperature increase (T).
T = Rth x Pd
3. Max allowed ambient temperature is:
Max Tref - T.
E.g PMN 5118U P at 0m/s:
1. ((
) - 1) × 99 W = 5.54 W
2. 5.54 W × 15.2°C/W = 84.2°C
3. 130 °C — 84.2°C = max ambient temperature is 45.8°C
The actual temperature will be dependent on several factors
such as the PCB size, number of layers and direction of
airflow.
Connections
Pin
Designation
Function
1
Inhibit/
UVLO Adjust
The Inhibit pin is an open-collector/drain,
negative logic input that is referenced to
GND. Applying a low level ground signal
to this input disables the module’s output
voltage. If the Inhibit pin is left open-
circuit, the module produces an output
whenever a valid input source is applied.
This input is not compatible with TTL
logic devices and should not be tied VI or
other voltage.
This pin is also used for input
undervoltage lockout (UVLO)
programming. Connecting a resistor from
this pin to GND (Pin 3) allows the ON
threshold of the UVLO to be adjusted
higher than the default value.
2
VI
The positive input voltage power node to
the module, which is referenced to
common GND.
3
GND
This is the common ground connection
for the VI and Vo power connections. It is
also the 0 Vdc reference for the control
inputs.
4
GND
This is the common ground connection
for the VI and Vo power connections. It is
also the 0 Vdc reference for the control
inputs.
5
Vo
The regulated positive power output with
respect to the GND.
6
VI
The positive input voltage power node to
the module, which is referenced to
common GND.
1
0.947
E
PMN 5000 series
POL regulator, Input 4.5-5.5 V, Output up to 30 A/108 W
EN/LZT 146 386 R1A
July 2007
Ericsson Power Modules AB
Technical Specification
31
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