參數(shù)資料
型號(hào)： PMP5818UWSR
廠商： ERICSSON POWER MODULES AB
元件分類： 電源模塊
英文描述： 1-OUTPUT 88 W DC-DC REG PWR SUPPLY MODULE
封裝： ROHS COMPLIANT PACKAGE-11
文件頁(yè)數(shù)： 40/60頁(yè)
文件大小： 4072K
代理商： PMP5818UWSR
Ericsson Internal
PRODUCT SPECIFICATION
4 (13)
Prepared (also subject responsible if other)
No.
EYIPYAN
3/1301-BMR657 5818 Uen
Approved
Checked
Date
Rev
Reference
SEC/D (Julia You)
EQUENXU
2007-7-9
B
P M P 581 8U W P
Parallel Operation
Two regulators may be paralleled for redundancy if the total
power is equal or less than PO max. It is not recommended
to parallel the regulators without using external current
sharing circuits.
Remote Sense
The DC/DC regulators have remote sense that can be used
to compensate for voltage drops between the output and
the point of load. The sense traces should be located close
to the PCB ground layer to reduce noise susceptibility. The
remote sense circuitry will compensate for up to 10%
voltage drop between output pins and the point of load.
If the remote sense is not needed +Sense should be
connected to +Out and -Sense should be connected to -
Out.
Over Temperature Protection (OTP)
The regulators are protected from thermal overload by an
internal over temperature shutdown circuit.
When Tref as defined in thermal consideration section
exceeds the OTP threshold, the regulator will shut down.
The DC/DC regulator will make continuous attempts to start
up (non-latching mode) and resume normal operation
automatically when the temperature has dropped >10°C
below the temperature threshold.
Over Current Protection (OCP)
The regulators include current limiting circuitry for
protection at continuous overload.
The output voltage will decrease towards zero for output
currents in excess of max output current (max IO). The
regulator will resume normal operation after removal of the
overload. The load distribution should be designed for the
maximum output short circuit current specified.
Soft-start Power Up
From the moment a valid input voltage is applied, the soft-
start control introduces a short time-delay (typically 5-10
ms) before allowing the output voltage to rise.
The initial rise in input current when the input voltage first
starts to rise is the charge current drawn by the input
capacitors. Power-up is complete within 15 ms.
Auto Track Function
Auto TrackTM was designed to simplify the amount of
circuitry required to make the output voltage from each
module power up and power down in sequence. The
sequencing of two or more supply voltages during power
up is a common requirement for complex mixed-signal
applications, that use dual-voltage VLSI ICs such as DSPs,
micro-processors and ASICs.
Adjustable Undervoltage Lockout
The regualtors incorporate an input undervoltage lockout
(UVLO). The UVLO feature prevents the operation of the
module until there is a sufficient input voltage to produce a
valid output voltage. This enables the module to provide a
clean, monotonic powerup for the load circuit and also limit
the magnitude of current drawn from regulator’s input
source during the power-up sequence.
The UVLO characteristic is defined by the ON threshold
(VTHD) voltage. Below the ON threshold, the Inhibit control is
overridden, and the moudule does not produce an output.
The hysterisis voltage, which is the difference between the
ON and OFF threshold voltage, is set at 500 mV. The
hysteresis prevents start up oscillations, which can occur if
the input voltage drops slightly when the modules begins
E
PMP 5000 series
PoL Regulator
Input 4.5 - 14 V, Output up to 16 A / 88 W
EN/LZT 146 388 R1B December 2009
Ericsson AB
Technical Specication
45
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