QPW060A0P1Z Datasheet QPW060A0M1, QPW060A0M1-HZ, QPW050A0F1 | P10-P12

Data Sheet

QPW050/060 Series Power Modules; DC-DC converters

36-75Vdc Input; 1.2Vdc to 3.3Vdc Output

Test Configurations

Note: Measure input reflected-ripple current with a simulated

source inductance (LTEST) of 12 µH. Capacitor CS offsets

possible battery impedance. Measure current as shown above.

Figure 31. Input Reflected Ripple Current Test Setup.

Note: Use a 1.0 µF ceramic capacitor and a 10 µF aluminum or

tantalum capacitor. Scope measurement should be made using

a BNC socket. Position the load between 51 mm and 76 mm (2

in. and 3 in.) from the module.

Figure 32. Output Ripple and Noise Test Setup.

LOAD

CONTACT AND

SUPPLY

CONTACT

(+)

(–)

DISTRIBUTION LOSSES

RESISTANCE

Note: All measurements are taken at the module terminals.

When socketing, place Kelvin connections at module terminals

to avoid measurement errors due to socket contact resistance.

Figure 33. Output Voltage and Efficiency Test Setup.

Design Considerations

Input Source Impedance

The power module should be connected to a low

ac-impedance source. A highly inductive source

impedance can affect the stability of the power module.

For the test configuration in Figure 31, a 100F

electrolytic capacitor (ESR<0.7 at 100kHz), mounted

close to the power module helps ensure the stability of

the unit. Consult the factory for further application

guidelines.

Output Capacitance

High output current transient rate of change (high di/dt)

loads may require high values of output capacitance to

supply the instantaneous energy requirement to the

load. To minimize the output voltage transient drop

during this transient, low E.S.R. (equivalent series

resistance) capacitors may be required, since a high

E.S.R. will produce a correspondingly higher voltage drop

during the current transient.

Output capacitance and load impedance interact with

the power module’s output voltage regulation control

system and may produce an ’unstable’ output condition

for the required values of capacitance and E.S.R..

Minimum and maximum values of output capacitance

and of the capacitor’s associated E.S.R. may be dictated,

depending on the module’s control system.

The process of determining the acceptable values of

capacitance and E.S.R. is complex and is load-

dependant. GE provides Web-based tools to assist the

power module end-user in appraising and adjusting the

effect of various load conditions and output

capacitances on specific power modules for various load

conditions.

Safety Considerations

For safety agency approval the power module must be

installed in compliance with the spacing and separation

requirements of the end-use safety agency standards,

i.e., UL 60950-1 2nd, CSA C22.2 No. 60950-1-07, DIN EN

60950-1:2006 + A11 (VDE0805 Teil 1 + A11):2009-11; EN

60950-1:2006 + A11:2009-03. For the converter output

to be considered meeting the requirements of safety

extra-low voltage (SELV), the input must meet SELV

requirements.

If the input source is non-SELV (ELV or a hazardous

voltage greater than 60 Vdc and less than or equal to

75Vdc), for the module’s output to be considered as

meeting the requirements for safety extra-low voltage

(SELV), all of the following must be true:

Data Sheet

QPW050/060 Series Power Modules; DC-DC converters

36-75Vdc Input; 1.2Vdc to 3.3Vdc Output

Safety Considerations

(continued)

 The input source is to be provided with reinforced

insulation from any other hazardous voltages,

including the ac mains.

 One V

pin and one V

OUT

pin are to be grounded, or

both the input and output pins are to be kept

floating.

 The input pins of the module are not operator

accessible.

 Another SELV reliability test is conducted on the

whole system (combination of supply source and

subject module), as required by the safety agencies,

to verify that under a single fault, hazardous

voltages do not appear at the module’s output.

Note: Do not ground either of the input pins of the

module without grounding one of the output

pins. This may allow a non-SELV voltage to

appear between the output pins and ground.

The power module has extra-low voltage (ELV) outputs

when all inputs are ELV.

For input voltages exceeding –60 Vdc but less than or

equal to –75 Vdc, these converters have been evaluated

to the applicable requirements of BASIC INSULATION

between secondary DC MAINS DISTRIBUTION input

(classified as TNV-2 in Europe) and unearthed SELV

outputs.

The input to these units is to be provided with a

maximum 15A fast-acting (or time-delay) fuse in the

unearthed lead.

Data Sheet

QPW050/060 Series Power Modules; DC-DC converters

36-75Vdc Input; 1.2Vdc to 3.3Vdc Output

Feature Descriptions

Overcurrent Protection

To provide protection in a fault output overload

condition, the module is equipped with internal current-

limiting circuitry and can endure current limit for few

seconds. If overcurrent persists for few seconds, the

module will shut down and remain latch-off. The

overcurrent latch is reset by either cycling the input

power or by toggling the on/off pin for one second. If the

output overload condition still exists when the module

restarts, it will shut down again. This operation will

continue indefinitely until the overcurrent condition is

corrected.

An auto-restart option is also available.

Remote On/Off

Two remote on/off options are available. Positive logic

remote on/off turns the module on during a logic-high

voltage on the ON/OFF pin, and off during a logic low.

Negative logic remote on/off turns the module off during

a logic high and on during a logic low. Negative logic,

device code suffix "1," is the factory-preferred

configuration. To turn the power module on and off, the

user must supply a switch to control the voltage

between the on/off terminal and the VI (-) terminal

(Von/off). The switch can be an open collector or

equivalent (see Figure 34). A logic low is Von/off = 0 V to

I.2 V. The maximum Ion/off during a logic low is 1 mA.

The switch should maintain a logic-low voltage while

sinking 1 mA. During a logic high, the maximum Von/off

generated by the power module is 15 V. The maximum

allowable leakage current of the switch at Von/off = 15V

is 50 µA. If not using the remote on/off feature, perform

one of the following to turn the unit on:

For negative logic, short ON/OFF pin to VI(-).

For positive logic: leave ON/OFF pin open.

Figure 34. Remote On/Off Implementation.

Remote Sense

Remote sense minimizes the effects of distribution losses

by regulating the voltage at the remote-sense

connections. The voltage between the remote-sense

pins and the output terminals must not exceed the

output voltage sense range given in the Feature

Specifications table i.e.:

[Vo(+) – Vo(-)] – [SENSE(+) – SENSE(-)] % of V

o,nom

The voltage between the Vo(+) and Vo(-) terminals must

not exceed the minimum output overvoltage shut-down

value indicated in the Feature Specifications table. This

limit includes any increase in voltage due to remote-

sense compensation and output voltage set-point

adjustment (trim). See Figure 35. If not using the remote-

sense feature to regulate the output at the point of load,

then connect SENSE(+) to Vo(+) and SENSE(-) to Vo(-) at

the module.

Although the output voltage can be increased by both

the remote sense and by the trim, the maximum

increase for the output voltage is not the sum of both.

The maximum increase is the larger of either the remote

sense or the trim. The amount of power delivered by the

module is defined as the voltage at the output terminals

multiplied by the output current. When using remote

sense and trim: the output voltage of the module can be

increased, which at the same output current would

increase the power output of the module. Care should be

taken to ensure that the maximum output power of the

module remains at or below the maximum rated power.

Figure 35. Effective Circuit Configuration for Single-

Module Remote-Sense Operation Output Voltage.

Output Voltage Set-Point Adjustment (Trim)

Trimming allows the user to increase or decrease the

output voltage set point of a module. This is

accomplished by connecting an external resistor

between the TRIM pin and either the SENSE(+) or SENSE(-)

pins. The trim resistor should be positioned close to the

module.

If not using the trim feature, leave the TRIM pin open.

With an external resistor between the TRIM and SENSE(-)

pins (Radj-down), the output voltage set point (Vo,adj)

decreases (see Figure 36). The following equation

determines the required external resistor value to obtain

a percentage output voltage change of %.

Feature Description (continued)

Output Voltage Set-Point Adjustment (Trim)

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P21 P22-P24

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