PSL5A12-7LIRPCDA [BEL]

DC-DC Regulated Power Supply Module, 1 Output, METAL, CASE L04, MODULE;


型号：	PSL5A12-7LIRPCDA
厂家：	BEL FUSE INC.
描述：	DC-DC Regulated Power Supply Module, 1 Output, METAL, CASE L04, MODULE
文件：	总11页 (文件大小：245K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Industrial Environment

Switching Regulators 19"

PSL-Family

PSR: Positive Switching Regulators

PSL-Family

No input to output isolation

Single output of 5.1, 12, 15, 24 or 36 V DC/51...288 W

Input voltage up to 80 V DC

• High efficiency up to 94%

• Wide input voltage range

• Low input-to-output differential voltage

• Very good dynamic properties

• Input undervoltage cut-out

• External output voltage adjustment and inhibit

• Continuous no-load and short-circuit proof

• No derating

Safety according to IEC 950

Table of Contents

Page

Type Survey .............................................................. 5 - 37

Description ................................................................5 - 37

Safety and Installation Instructions ........................... 5 - 38

Immunity to Environmental Conditions...................... 5 - 39

Electromagnetic Compatibility EMC.......................... 5 - 40

Characteristics and Definitions.................................. 5 - 41

Electrical Input and Output Data ............................... 5 - 42

Standard Features .................................................... 5 - 44

Description of Options............................................... 5 - 44

Mechanical Data ....................................................... 5 - 46

Type Key and Product Marking ................................. 5 - 47

Type Survey

Table 1: Type survey

Nominal

output

voltage

U_{o nom}

Nominal

output

current

I_{o nom}

Input

voltage

range

Nominal

input

voltage

U_{i nom}

Efficiency

Type

designation

Options

Superseded

old type

(phase-out)

U_i

5.1 V

12 V

15 V

24 V

36 V

12 A

10 A

8 A

7...40 V

8...80 V

20 V

40 V

83%

76%

89%

90%

92%

94%

PSL 5A12-7R

PSL 5A10-7R

PSL 128-7R

PSL 158-7R

PSL 248-7R

PSL 368-7R

-9, L, i, P, C, D, A

PSR 512E-7

PSR 510E-7

PSR 128E-7

PSR 158E-7

PSR 248E-7

PSR 368E-7

15...80 V

19...80 V

29...80 V

42...80 V

50 V

60 V

¹See data ∆U_{io min}(min. differential voltage U_i– U_o)

Description

The PSL family of positive swiching regulators is designed

as power supply modules for electronic systems. Their ma-

jor advantages include a high level of efficiency that re-

mains virtually constant over the entire input range, high

reliability, low ripple and excellent dynamic response.

Modules with input up to 80 V are specially designed for

secondary switched and battery driven applications.

Case L04: Aluminium, black finish and self cooling.

External input circuitry

An external capacitor (see "Application Notes") is required

in rectifier mode and in DC operation mode only, if the sum

of the lengths of the two input lines between source and in-

put (without option L) is greater than approx. 5 m. For long

connection lines the use of option L is recommended in or-

der to reduce superimposed interference voltages or cur-

rents and to prevent oscillation.

Edition 2/96 - © Melcher AG

5 - 37

MELCHER

The Power Partners.

PSL-Family

Switching Regulators 19"

Industrial Environment

I _i

I_o

Vo+

Vi+

Input

Filter

L (option)

C (option)

Control circuit

U_i

U_o

C_e

A (option)

–

R/i

Gi–

Go–

Fig. 1

Block diagram

D (option)

P (option)

Safety and Installation Instructions

Safety

If the output circuit of a switching regulator is operator-ac-

cessible according to the IEC 950 related safety standards,

it shall be an SELV circuit (Safety Extra Low Voltage circuit,

i.e. a circuit, separated from mains by at least basic insula-

tion, that is so designed and protected that under normal

and single fault conditions, the voltage between any two

conductors and between any conductor and earth does not

exceed 60 V DC).

installer or user to assure the compliance with the relevant

and applicable safety standards.

If the following table is observed, the output of any switch-

ing regulator is considered to be an SELV circuit up to a

nominal output voltage of 36 V.

Note: Check for hazardous voltages before altering

any connections. Do not open the module. The input

and the output circuitry are not separated, i.e. the nega-

tive path is internally interconnected!

In the following section an interpretation is provided of the

IEC 950 safety standard with respect to the safety status of

the output circuit. However, it is the sole responsibility of the

Table 2: Insulation concept for SELV circuits

Nominal Minimum required grade Maximum Minimum required

Measures to achieve the

specified safety status

of the output circuit

Resulting safety

status of the

switching

mains

of isolation, to be

output

safety status of the

supply

provided by the AC-DC

voltage

front end output circuit

voltage front end, including mains from the

regulator output

circuit

(AC)

supplied battery charger front end

None

Battery supply completely

separated from mains

≤60 V

≤80 V

SELV battery circuit

None

SELV circuit

Hazardous voltage battery Input fuse ¹and unearthed,

circuit²non operator-accessible case ²

Hazardous voltage battery Input fuse ¹and earthed output Earthed SELV

circuit

circuit ³and earthed ³or non

operator-accessible case

circuit

≤250 V

Basic

≤60 V

≤80 V

Earthed SELV circuit

ELV circuit

Earthed input circuit ³

SELV circuit

Input fuse ¹and

earthed output circuit ³

Earthed SELV

circuit

Hazardous voltage

secondary circuit

Input fuse ¹and earthed output Earthed SELV

circuit ³and earthed ³or non

operator-accessible case

circuit

Double or reinforced

≤60 V

≤80 V

SELV circuit

None

SELV circuit

Double or reinforced insu- Input fuse ¹and unearthed and SELV circuit

lated unearthed hazardous non operator-accessible case ²

voltage secondary circuit ²

The installer shall provide an approved fuse (slow blow type with lowest rating suitable for the application, max. 12.5 A) in the positive

or negative input conductor directly at the input of the switching regulator. For UL's purpose, the fuse needs to be UL-listed. If option

C is fitted, a suitable fuse is built-in.

Has to be insulated from earth by double or reinforced insulation according to the relevant safety standard, based on the maximum in-

put voltage of the switching regulator (contrary to the case marking: "This apparatus must be earthed.").

The earth connection has to be provided by the installer according to the relevant safety standards, e.g. IEC 950.

5 - 38

Edition 2/96 - © Melcher AG

MELCHER

The Power Partners.

Industrial Environment

Switching Regulators 19"

PSL-Family

Standards and Approvals

Protection Degree

All Melcher power supplies are subject to manufacturing

surveillance in accordance with ISO 9001 standards.

The protection degree is defined by IP 30 (equipped with

any potentiometer adjustable option: IP 20). The protection

degree applies only if the module is plugged-in or the fe-

male connector is properly attached to the module.

All units are UL recognized as per UL 1950, UL 1012 and

CAN/CSA C22.2 No. 234-M90.

Installation Instructions

Table 3: H11 connector pin allocation and designation

The connector pin allocation table defines the electrical

potentials and the physical pin position on the connector.

Pin no. 32 is the protective ground pin and is protruding, i.e.

attaching the female connector, this pin provides electrical

contact first. The modules should only be wired via the fe-

male connector H11 (according to DIN 41612) to ensure

requested safety!

Electrical Determination

Type H11

Pin No.

Design.

R-input (or inhibit input) ¹

R (i)

Undervoltage monitor (Option D)

Output voltage (negative)

Output voltage(positive)

Output voltage (positive)

Go–

Vo+

Input voltage (negative)

Input voltage (positive)

Gi–

Vi+

Input voltage (positive)

Protective ground (protruding pin)

32 29 26 23 20 17 14 11

Fig. 2

View of male H11 connector

R-input (output voltage programming) not available with

option P (potentiometer) or option i (inhibit)

Immunity to Environmental Conditions

Table 4: Mechanical stress

Test Method

Standard

Test Conditions

Status

Damp heat

steady state

DIN 40046 part

IEC 68-2-3

MIL-STD-810D section 507.2 Duration:

Temperature:

Relative humidity:

40 ^±2°C

56 days

Unit not

operating

93 ^+2/-3

Shock

(half-sinusoidal)

DIN 40046 part 7

IEC 68-2-27

MIL-STD-810D section 516.3 Number of bumps:

Acceleration amplitude:

Bump duration:

100 g_n= 981 m/s²

6 ms

18 (3 each direction)

Unit

operating

Continuous shock DIN 40046 part 26

(half-sinusoidal)

Acceleration amplitude:

Bump duration:

40 g_n= 392 m/s²

6 ms

6000 (1000 each direction)

Unit

operating

IEC 68-2-29

MIL-STD-810D section 516.3 Number of bumps:

Vibration

(sinusoidal)

DIN 40046 part 8

IEC 68-2-6

MIL-STD-810D section 514.3 Acceleration amplitude:

Test duration:

Frequency (1 Oct/min):

Max. vibration amplitude:

10...2000 Hz

Unit

operating

0.35 mm (10...60 Hz)

5 g_n= 49 m/s²(60...2000 Hz)

7.5 h (2.5 h each axis)

Fda Random vibration DIN 40046 part 23

Acceleration spectral density: 0.05 g²/Hz

Unit not

wide band

reproducibility high

IEC 68-2-35

Frequency band:

Acceleration magnitude:

Test duration:

20...500 Hz

4.9 g_rms

3 h (1 h each axis)

operating

Salt mist

cyclic

(sodium chloride

NaCl solution)

DIN 40046 part 105

IEC 68-2-52

Concentration:

Duration:

Storage:

Storage duration:

Number of cycles:

5% (30°C)

Unit not

operating

2 h per cycle

40°C, 93% rel. humidity

22 h per cycle

Table 5: Temperature specifications

Temperature

Standard -7

Option -9

Characteristics

Conditions

min

–25

–40

max

min

–40

–55

max

Unit

T_A

T_C

T_S

Ambient temperature

U_{i min}...U_{i max}

I_o= 0...I_{o nom}

°C

Case temperature

Storage temperature

Not operational

100

Edition 2/96 - © Melcher AG

5 - 39

MELCHER

The Power Partners.

PSL-Family

Switching Regulators 19"

Industrial Environment

Table 6: MTBF and device hours

MTBF

Ground Fixed

Ground Mobile

Device Hours ¹

MTBF acc. to MIL-HDBK-217D

T_C= 40°C

130'000 h

T_C= 70°C

T_C= 40°C

36'000 h

T_C= 70°C

58'000 h

17'000 h

3'900'000 h

¹Statistical values, based on an average of 4300 working hours per year and in general field use

Electromagnetic Compatibility EMC

Immunity

General condition: Case earthed.

Table 7: Immunity type tests

Phenomenon

Standard

Class

Level

Coupling

mode ⁴

Value

applied

Waveform

Source

Imped.

Test

procedure

In Per-

oper. form.

Impulse voltage IEC 255-4

III

i/o, i/c, o/c

+i/–i

5000 V_p

1.2/50 µs

500 Ω

200 Ω

100 Ω

3 pos. and 3 neg.

impulses per

coupling mode

yes

App. E4 ⁵

(1976)

High frequency IEC 255-4

III

i/o, i/c, o/c

+i/–i

2500 V_p

1000 V_p

400 damped

1 MHz waves/s

2 s per

coupling mode

disturbance

App. E5 ⁵

(1976)

Voltage surge

IEC 571-1

(1990-07)

i/c, +i/–i

800 V_p

100 µs

50 µs

1500 V_p

1 pos. and 1 neg.

voltage surge per

coupling mode

3000 V_p

4000 V_p

7000 V_p

6000 V_p

5 µs

1 µs

100 ns

1/50 ns

Electrostatic

discharge

IEC 801-2

(1991-04)

contact discharge

to case

330 Ω

10 positive and

10 negative

discharges

yes

Electric field

IEC 801-3

(1984)

antenna in

1m distance

3 V/m sine wave mod-

ulated w. 1 kHz

26…1000 MHz

yes

Fast transient/

burst

IEC 801-4

(1988)

i/c, +i/–i

2000 V_pbursts of 5/50 ns 50 Ω

5 kHz rep. rate

1 min positive

1 min negative

bursts per

transients with

15 ms burst

duration and a

coupling mode

4000 V_p300 ms period

Transient

IEC 801-5

(Draft1993-01)

III

i/c

2000 V_p

1000 V_p

1.2/50 µs

12 Ω

2 Ω

5 pos. and 5 neg.

impulses per

coupling mode

yes

+i/–i

Immunity to

conducted

IEC 801-6

i, o, signal wires

10 V_rms

80% amplitude

modulated

50 Ω

AM 0.15...80 MHz yes

disturbancies

with 1 kHz

Normal operation, no deviation from specifications

Normal operation, temporary deviation from specs possible

With option C: manual reset

i = input, o = output, c = case

In correspondance with DIN 57435 part 303 and VDE 0435 part 303 (1984-09)

Option L neccessary

Open circuit

Emission

For emission levels refer to "Electrical Input and Output

Data".

5 - 40

Edition 2/96 - © Melcher AG

MELCHER

The Power Partners.

Industrial Environment

Switching Regulators 19"

PSL-Family

Parallel and Series Connection

Characteristics and Definitions

Outputs of equal nominal voltages can be parallel-con-

nected. However, the use of a single unit with higher output

power, because of its power dissipation, is always a better

solution.

Output Protection

A voltage suppressor diode protects the output against an

internally generated overvoltage, which could occur due to

a failure of the control circuit, which in worst case condi-

tions fails into a short circuit. The suppressor diode is not

designed to withstand externally applied overvoltages. The

user should ensure that systems with Melcher power sup-

plies, in the event of a failure, do not result in an unsafe

condition (fail-safe).

In parallel-connected operation, one or several outputs may

operate continuously at their current limit knee-point which

will cause an increase of the case temperature. Conse-

quently, the max. ambient temperature value should be re-

duced by 10 K.

Outputs can be series-connected with any other module. In

series-connection the maximum output current is limited by

the lowest current limitation. Galvanically separated source

voltages are needed for each module!

Dynamic Characteristics

U_o

u_od

U_{o I}

Short circuit behaviour

A constant current limitation circuit holds the output current

almost constant whenever an overload or a short circuit is

applied to the regulator's output. It acts self-protecting and

recovers - in contrary to the fold back method - automati-

cally after removal of the overload or short circuit condition.

u_od

t_r

I /I

o nom

3/3

2/3

1/3

U_o/U_{o nom}

1.2

1.0

≥10 µs

0.8

I_{o L}

0.6

Fig. 3

Behaviour and characteristics under varying load condi-

tions.

0.4

0.2

Temperature

I_o/I_{o nom}

0.2

0.4

0.6

0.8

1.0

1.2

1.4

When a converter is located in free, quasi-stationary air at a

temperature T_A= 71°C and is operated at its nominal output

power, the case temperature T_Cwill be about 95°C after the

warm-up phase measured at the measuring point of case

temperature T_C(see "Mechanical Data").

Fig. 5

Overload, short-circuit behaviour U_oversus I_o

Under practical operating conditions, the ambient tempera-

ture T_Amay exceed 71°C, provided additional measures

are taken to ensure that the case temperature T_Cdoes not

exceed its maximum value of 95°C ( heat sink, fan, etc.).

Example: Sufficient forced cooling allows T_{A max}= 85°C. A

simple check of the case temperature T_C(T_C≤ 95°C) at full

load ensures correct operation of the system

P_o[%]

110

100

P_{o max}(forced cooling)

P_{o max}

(convection cooling)

T_{C max}

T_A[°C]

100

–40

Fig. 4

Output power derating versus ambient temperature

Edition 2/96 - © Melcher AG

5 - 41

MELCHER

The Power Partners.

PSL-Family

Switching Regulators 19"

Industrial Environment

Electrical Input and Output Data

General Conditions

– T_A= 25°C, unless T_Cis specified.

– With R or option P, output voltage U_o= U_{o nom}at I_{o nom}

Table 8a: Input and output data

Characteristics

Conditions

PSL 5A12

PSL 5A10

PSL 128

Unit

min

5.07

12.0

typ

max

min

typ

max

min

11.92

8.0

typ

max

Output

U_{o nom}Output voltage

I_{o nom}Output current

U_{i nom}, I_{o nom}

5.13

15.6

5.07

10.0

5.13

12.07

U_{i min}...U_{i max}

T_{C min}...T_{C max}

12.0

10.0

8.0

I_oL

Output current

limitation response

13.0

10.4

150

u_o

Ripple at output

(BW = 20 MHz)

U_{i nom}

I_{o nom}

mV_pp

∆U_{o U}Static control deviation U_{i min}...U_{i max}

versus input voltage U_iI_{o nom}

∆U_{o I}Static control deviation U_{i nom}

versus output current I_oI_o= 0…I_{o nom}

u_{o d}

t_r

Dynamic control

deviation ¹

U_{i nom}

_{o nom}↔ ¹/

I_{o nom}

130

Dynamic load transient

time recovery ¹

µs

α_uo

Temperature coefficient U_{i min}...U_{i max}

±1

±2

mV/K

%/K

∆U_o/∆T_C

T_{C min}...T_{C max}

I_o= 0...I_{o nom}

±0.02

Input

U_i

Input voltage

I_o= 0...I_{o nom}

T_{C min}...T_{C max}

V DC

∆U_{io min}Minimum differential

voltage U_i- U_o

U_{i o}

I_{i 0}

Undervoltage cut-out

6.3

7.3

No load

input current

I_o= 0

U_{i min}...U_{i max}

I_{i m}

Peak value of

inrush current ³

U_{i nom}

150

250

t_{i s}

t_{i r}

Rise time ³

µs

Tail half value time ³

I_{i m}

Peak value of

inrush current ³

U_{i nom}

with option L

250

350

t_{i s}

Rise time ³

µs

t_{i r}

Tail half value time ³

125

u_{i rfi}

RFI level at input, ⁴

0.01...30 MHz

VDE 0871 (6.78)

U_inom, I_{o nom}

dB(µV)

Efficiency

U_{i nom}, I_{o nom}

Isolation

U_is

Isolation test voltage

electronics to case

Inputs/outputs

interconnected

750

V DC

See "Dynamic characteristics"

The minimum differential voltage ∆U_{io min}between input and output increases linearly from 0 to 1 V at T_A= 46°C and 71°C

(T_C= 70°C and 95°C)

Definitions according to VDE 0433, part 3

With option L and additional external input capacitor C_e= 120 µF/100 V, e.g. Nichicon, PF(M) series, or equivalent

5 - 42

Edition 2/96 - © Melcher AG

MELCHER

The Power Partners.

Industrial Environment

Switching Regulators 19"

PSL-Family

Table 8b: Input and output data

Characteristics

Conditions

PSL 158

PSL 248

PSL 368

Unit

min

14.91

8.0

typ

max

min

23.85

8.0

typ

max

min

35.78

8.0

typ

max

Output

U_{o nom}Output voltage

I_{o nom}Output current

U_{i nom}, I_{o nom}

15.09

24.14

36.22

U_{i min}...U_{i max}

T_{C min}...T_{C max}

8.0

I_oL

Output current

limitation response

10.4

150

100

10.4

250

220

160

10.4

300

270

160

u_o

Ripple at output

(BW = 20 MHz)

U_{i nom}

I_{o nom}

100

150

120

150

200

125

220

100

mV_pp

∆U_{o U}Static control deviation U_{i min}...U_{i max}

versus input voltage U_iI_{o nom}

∆U_{o I}Static control deviation U_{i nom}

versus output current I_oI_o= 0…I_{o nom}

u_{o d}

t_r

Dynamic control

deviation ¹

U_{i nom}

_{o nom}↔ ¹/

I_onom

130

Dynamic load transient

time recovery ¹

µs

α_uo

Temperature coefficient U_{i min}...U_{i max}

±3

±5

±8

mV/K

%/K

∆U_o/∆T_C

T_{C min}...T_{C max}

I_o= 0...I_{o nom}

±0.02

Input

U_i

Input voltage

I_o= 0...I_{o nom}

T_{C min}...T_{C max}

V DC

∆U_{io min}Minimum differential

voltage U_i- U_o

U_{i o}

I_{i 0}

Undervoltage cut-out

7.3

No load

input current

I_o= 0

U_{i min}...U_{i max}

I_{i m}

Peak value of

inrush current ³

U_{i nom}

250

t_{i s}

t_{i r}

Rise time ³

µs

Tail half value time ³

I_{i m}

Peak value of

inrush current ³

U_{i nom}

with option L

350

t_{i s}

Rise time ³

µs

t_{i r}

Tail half value time ³

125

u_{i rfi}

RFI level at input, ⁴

0.01...30 MHz

VDE 0871 (6.78)

U_inom, I_{o nom}

dB(µV)

Efficiency

U_{i nom}, I_{o nom}

Isolation

U_is

Isolation test voltage

electronics to case

Inputs/outputs

interconnected

750

V DC

¹See "Dynamic characteristics"

²The minimum differential voltage ∆U_{io min}between input and output increases linearly from 0 to 1 V at T_A= 46°C and 71°C

(T_C= 70°C and 95°C)

³Definitions according to VDE 0433, part 3

⁴With option L and additional external input capacitor C_e= 120 µF/100 V, e.g. Nichicon, PF(M) series, or equivalent

5 - 43

MELCHER

The Power Partners.

PSL-Family

Switching Regulators 19"

Industrial Environment

Standard Features

R External Output Voltage Adjustment

Vo +

U_ref

R₂

Note: With open R input, U_o= U_{o nom}

4000 Ω

(For superseded PSR types, U_o= 1.08 • U_{o nom}

)

R-input together with option i or option P cannot

be supported simultaneously.

–

R₁

The output voltage U_ocan either be adjusted with an exter-

nal resistor (R₁or R₂) or with an external voltage (U_ex).The

adjustment range is 0...1.08 of U_{o nom}. The minimal differen-

tial voltage ∆U_{io min}between input and output should be

Go –

Fig. 7

Voltage adjustment with external resistor R₁or R₂[Ω]

maintained (see data). Min. input = Undervoltage cut-out.

Vo +

U _ref

b) U_o= 0...100% U_{o nom}, using R₁between R and G (Go-):

4000 Ω

R₁

U_o≈ U_{o nom}• ––––––––

R₁+ 4000

4000 • U_o

R₁≈ –––-––––

U_{o nom}- U_o

–

U_ex

c) U_o= U_{o nom}...U_{o max}, using R₂between R and Vo+:

U_{o max}= U_{o nom}+ 8%

Go –

R₂

U _ref

k = ––––––

U_{o nom}

Fig. 6

U_o≈ U_ref• ––––––––––––––––––

k • (R₂+ 4000) - 4000

Voltage adjustment with U_ex[V] between R and G (Go-):

U_ref

a) U_o≈ U_ex• ––^o––^no–^m–

(U_ref= 2.5 V ±4%)

U_o• (1-k)

k • U_o- U_ref

R₂≈ 4000 • –––––––––

(U_ref= 2.5 V ±4%)

Caution: To prevent damage U_exshould not exceed

U_ref, nor be negative.

All formulae give approximate values only.

Description of Options

Option i Inhibit

Vo+

Vi+

Gi–

I_inh

Note: With open i-input, output is enabled (U_o= on).

Inhibit excludes R function!

U_inh

The inhibit input allows the switching regulators to be disa-

bled via a control signal. In systems with several units, this

feature can be used, for example, to control the activation

sequence of the regulators by a logic signal (TTL, C-MOS,

etc.).

Go–

Fig. 8

Definition of I_inhand U_inh

An output voltage overshoot will not occur when the units

are switched on or off.

I _inh[mA]

U_o/U_{o nom}

0.1

t_r

t_f

U _inh

U _oon

U _ooff

-50

U _inh[V]

-20

-30

-10

-40

10 20 30 40 50

Fig. 9

Fig. 10

Inhibit current I_inhversus inhibit voltage U_inh

Output response as a function of inhibit signal

Data

Table 9: Inhibit characteristics

Characteristics

Conditions

min

–50

+2.4

typ

max

+0.8

+50

Unit

U_inh

Inhibit input voltage to keep U_o= on

U_{i min}...U_{i max}

T_{C min}...T_{C max}

V DC

regulator output voltage...

U_o= off

t_r

Switch-on time after inhibit command

Switch-off time after inhibit command

Input current when inhibited

U_i= U_{i nom}

R_L= U_{o nom}/I_{o nom}

t_f

I_{i off}

I_o= 0, U_i=U_{i nom}

5 - 44

MELCHER

The Power Partners.

Industrial Environment

Switching Regulators 19"

PSL-Family

Option -9 Extended Temperature Range

Option P Potentiometer

The operational ambient temperature range is extended to

T_A= –40...71°C.

Option P and the R-function cannot be supported simulta-

neously. The output voltage U_ocan be adjusted with a

screwdriver in the range from 0.92...1.08 of the nominal out-

put voltage U_{o nom}

Option L Input filter

However, the minimum differential voltage ∆U_{i o min}between

input and output voltages as specified in "Electrical Input

and Output Data" should be maintained.

Option L is recommended to reduce superimposed inter-

ference voltages, and to prevent oscillations, if input lines

exceed approx. 5 m in total length. The fundamental wave

(approx. 120 kHz) of the reduced interference voltage be-

tween Vi+ and Gi– has, with an input line inductance of

Option U Ambient Temp. Range acc. UL Recognition

5 µH a maximum magnitude of 4 mV_rms

Underwriters Laboratories (UL) have approved the PSL

family as recognized components up to an ambient tem-

perature of T_{A max}– 10 K given by the upper temperature

limit of the standard PCB material. If the full maximum am-

bient temperature T_{A max}is required with UL approval, op-

tion U should be requested. It consists of an alternative

PCB material with a higher maximum temperature specifi-

cation.

The input impedance of the switching regulator at 120 kHz

is about 50 mΩ. The harmonics are small in comparison

with the fundamental wave. See also data: RFI.

With option L, the maximum permissible additionally super-

imposed ripple u_iof the input voltage (rectifier mode) at a

specified input frequency f _ihas the following values:

Input voltage up to 40 V:

The European approval boards have in contrast to UL ac-

cepted the standard PCB material to be operated up to

T_{A max}= 71°C without any further precautions.

u_{i max}= 12 V_ppat 100 Hz or V_pp= 1200 Hz/f _i• 1V

Input voltage up to 80 V:

u_{i max}= 22 V_ppat 100 Hz or V_pp= 2200 Hz/f _i• 1V

Option C Thyristor Crowbar

This option is recommended to protect the load against

power supply malfunction, but it is not designed to sink ex-

ternal currents.

Note: As a central overvoltage protection device, the crow-

bar is usually connected to the external load via distributed

inductance of the lines. For this reason, the overvoltage at

the load can temporarily exceed the trigger voltage U_{o c}. De-

pending on the application, further decentralized over-

voltage protection elements may have to be used addition-

ally.

A fixed-value monitoring circuit checks the output voltage

U_o. When the trigger voltage U_ocis reached, the thyristor

crowbar triggers and disables the output. It may be deacti-

vated by removal of the input voltage. In case of a switching

transistor defect, an internal fuse prevents excessive cur-

rent.

Table 10: Crowbar trigger levels

Characteristics

Conditions

5.1 V

12 V

15 V

min

16.5

24 V

min

36 V

max

Unit

min

5.8

max

6.8

min

13.5

max

min

U_{o c}Trigger voltage

U_{i min}...U_{i max}

I_o= 0...I_{o nom}

T_{C min}...T_{C max}

45.5

1.5

t_s

Delay time

1.5

µs

Option D (“Save Data”, input undervoltage monitor)

Note: Output instead of input undervoltage monitor is

The voltage U_tcan be externally adjusted with a trim poten-

tiometer by means of a screwdriver. The hysteresis U_Hof

U_tis <2%. Terminal D stays low for a minimum time

t_{low min}, in order to prevent any oscillation.U_tcan be set to a

value between U_{i min}and U_{i max}according to fig. 10. It is im-

portant to note that the FET can become conductive again

when U_D> U_i– 3V.

available on request (option D1).

If the input voltage U_iis below the adjustable threshold volt-

age U_t, the control circuit for terminal D has low impedance.

Terminal D and Go– are connected to a self-conducting

field effect transistor (FET). A 0.5 W Zener diode provides

protection against overvoltages.

U_H

U_D

10 kΩ

I_D

U_{D high}

8.2 V

Go –

Vi +

+5 V

FET

U_t

U_D

100 pF

U_{D low}

Gi –

U_i

U_t

Fig. 11

Fig. 12

Definition of U_tand U_H

Test circuit with definition of voltage U_Dand current I_Don

Terminal D.

5 - 45

MELCHER

The Power Partners.

PSL-Family

Switching Regulators 19"

Industrial Environment

Data

Table 11: Option D data

Characteristics

Conditions

PSL

Unit

min

typ

max

0.8

U_{D low}

U_{D high}

t_{low min}

t_{D f}

Voltage - Terminal D at low impedance

U_i< U_t, I_D≤ 2.5 mA

Voltage - Terminal D at high impedance

Minimum duration U_{D low}

U_i> U_t+ U_H, I_D> 25 µA

4.75

µs

Response time to U_{D low}

I_{D max}

Maximum current - Terminal D

Application examples

a) The signal U_Dcan be utilized in battery powered systems to provide a warning in case of low batteries.

b) In case of power failure, the signal can serve to initiate data save routines.

Option A Test sockets

Test sockets (pin Ø = 2 mm) for measuring the output volt-

age are located at the front panel of the module. The output

voltage is measured internally directly at the connector

pins.

Mechanical Data

Dimensions in mm. Tolerances ±0.3 mm unless otherwise indicated.

European

Projection

168.5 ^±0.5

M2.5

2 TE

17.4 10.9

4.9

159.4

127

20 ^±0.5

6 TE

Test sockets (option A)

LED output voltage indicator

Potentiometer (option P)

min. 5

ø5.2

ø3

M3; 4 mm deep

(for mounting screws)

0.9

1.5

173.7 ^±0.5

6.4

(19.1)

20.32

4 TE

Mounting plane of

connector H11

Measuring point of

case temperature T_C

Potentiometer (option D)

Fig. 13

Case L04 (weight 550 g)

5 - 46

MELCHER

The Power Partners.

Industrial Environment

Switching Regulators 19"

PSL-Family

Type Key and Product Marking

Type Key

PSL 12 8 -7 L i R P C D A

Positive switching regulator in case L04 ..................... PSL

Blank ..................................................................................

Nominal output voltage in volt (5A –> 5.1) ............. 5.1...36

Nominal output current in ampere............................. 8...12

Ambient temperature range

T_A= –25...71°C ................................................... -7

T_A= –40...71°C ................................................... -9

Input filter ......................................................................... L

Inhibit input........................................................................ i

External output voltage adjustment................................. R

Potentiometer...................................................................P

Thyristor-Crowbar ........................................................... C

"Save Data" undervoltage monitor .................................. D

Test sockets .....................................................................A

Example:PSL 128-7LiPC = A positive switching regulator with a 12 V, 8 A output, ambient temperature range of

–25…71°C, input filter, inhibit input, potentiometer and thyristor-crowbar.

Produkt Marking

Main face: Family designation, applicable safety approval and recognition marks, warnings, pin allocation, Melcher pat-

ent nos. and company logo.

Front plate: Identification of LED, optional test sockets and potentiometers.

Back plate: Specific type designation, input voltage range, nominal output voltage and current, pin allocation of options

and auxiliary functions and degree of protection.

Rear side: Label with batch no., serial no. and data code comprising production site, modification status of the main PCB

and production date.

5 - 47

MELCHER

The Power Partners.

PSL5A12-7LIRPCDA [BEL]

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