LT1201-7DB1_技术文档

T Series Data Sheet

500 Watt AC-DC Converters

®

Features

• Universal AC input range 70 to 255 VAC with PFC

• Class I equipment

• DC output for 24 and 48 V loads

• Battery charging for 24 and 48 V batteries with remote

temperature control

• 4 kVAC I/O electric strength test voltage

• Telecom rectifier applications

• Very high efficiency, typically 93%

• Power factor >0.96, harmonics according to IEC/EN

61000-3-2, low RFI

• No inrush current, hot swap capability

• High power density, rugged mechanical design, all

boards covered with a protective lacquer

• Very compact 19" cassette (28 TE, 3 U, 160 mm)

Safety according to IEC/EN 60950-1 and UL/CSA

60950-1 2^ndEd.

111

4.4"

3 U

141

5.6"

28 TE

168

6.6"

output voltage is backed-up by a battery. The float charge of the

battery can be set by a cell-voltage selector switch according to

the battery type used. These converters are equipped with a

temperature sensor input, in order to improve the life

expectancy of the battery.

Description

The T Series converters are electrically isolated AC-DC

converters with an output power of up to 550 W. For higher

power requirements several converters may be connected in

parallel.

The rectifier models are suited for DC-bus applications at

constant voltage. As the output voltage is SELV, even

electrically non-isolated switching regulators, such as the PSx

models, may be connected to the output.

The input is ideally adapted to the mains: Full power factor

correction, no inrush current, low RFI level, and high transient

and surge immunity are key design features. A T Series

converter behaves similar to a resistive load.

The LT/UT1701 models are especially optimized to build

distributed power systems together with the 48Q, CQ, or CP

Series DC-DC converters, as the signalling capabilities of

both families are matched. Distributed power systems have

as one advantage less power losses over load lines and fewer

regulation problems.

The LT models can be operated from a universal AC-input

range from 85 to 255 VAC. It is the preferred type for 230 VAC

mains, whereas the UT models are optimized for 110/

120 VAC mains. The output delivers an electrically isolated

Safety Extra Low Voltage (SELV) and is short-circuit and no-

load proof. Depending on the type, two output characteristics

are available, intended either for rectifier applications or for

battery charging purposes.

Power-One also offers backplanes for fast and simple set-up

of 19" DIN-rack systems with T Series converters; see

Accessories.

The latter types can be integrated into systems, where the

Table of Contents

Page

Different Configurations and Applications ....................... 18

Electromagnetic Compatibility (EMC) .............................. 21

Environmental Conditions ............................................... 22

Mechanical Data ............................................................... 24

Safety and Installation Instructions .................................. 25

Description of Options ..................................................... 28

Accessories ...................................................................... 29

Description ......................................................................... 1

Model Selection .................................................................. 2

Functional Description ....................................................... 3

Electrical Input Data ........................................................... 4

Electrical Output Data ......................................................... 6

Control Features of the Battery Chargers ........................ 11

Auxiliary Functions ............................................................ 13

BCD20023 Rev AB, 02-Nov-2010

Page 1 of 31

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T Series Data Sheet

500 Watt AC-DC Converters

®

Model Selection

Table 1: All models. For all models and options, contact Power-One for availibility and lead times !

Output voltage

Output current

Operating input voltage range and efficiency

Options

1

V_{o set}at V_{i nom}, 0.5 I_{o nom}

I_onom

[A]

V_{i min}– V_{i max}

70 – 140 VAC

η_min

[%]

V_{i min}– V_{i max}

85 – 255 VAC

η_min

[%]

[VDC]

24.25

25.25 – (27.25) – 28.25

37.9 – (40.88) – 42.4

48

16

14.5

11

UT1201-7^{2, 4}

UT1240-7Z^{4, 3}

–

91

–

LT1201-7 ^{2, 6}

LT1240-7Z ^{6, 3}

LT1840-7Z ^{6, 3}

LT1702-7 ^{2, 6}

LT1701-7 ⁶

90.5

91

D

F

B1

91

11

–

92.5

92

54.5

10

UT1701-7⁵

UT1740-7Z^{5, 3}

92

50.5 – (54.5) – 56.5

10

LT1740-7Z ^{6, 3}

1

Min. efficiency measured at V_{i nom}and I_{o nom}; typ. values are approx. 1% better.

2

3

4

5

6

Instead of output power limitation, output current limitation.

Output voltage range controlled by input V_cr, remote temperature sensor, and cell voltage selector switch.

Reduced output power for V_i= 70 – 95 VAC; see Output Power Limitation.

Reduced output power for V_i= 70 – 100 VAC; see Output Power Limitation.

Reduced output power for V_i= 85 – 155 VAC; see Output Power Limitation.

Part Number Description

L T 1 7 40 -7 D F Z B1

Operating input range V_i, f_i

70 – 140 VAC, 47 – 63 Hz .......................... U

85 – 255 VAC, 47 – 63 Hz ........................... L

Series ............................................................................... T

Number of outputs ........................................................... 1

Output setting voltage V_{o set}

24, 27.25 V .................................................. 2

48, 54.5 V .................................................... 7

40.9 V .......................................................... 8

Recifier version .................................... 01, 02 ³

Battery charger version ............................. 40 ⁴

Other voltages .................................. 00 to 99

Ambient temperature range T_A

–25 to 71 °C ................................................ -7

Customer specific ............................. -0 to -6

Auxiliary functions and options ¹

Undervoltage monitor (option) .................... D

Input fuse externally accessible .................. F

Cell voltage selector switch ......................... Z ²

Baseplate (option) ..................................... B1

1

See Description of Options

Only for T1240/1740/1840

No input for battery temperature sensor

With input for battery temperature sensor

2

3

4

Example: LT1740-7Z: AC-DC converter, input voltage range 85 – 255 VAC, single output 50.5 – 56.5 V, 10 A,

operational ambient temperature –25 to 71 °C, with cell voltage selector switch.

Product Marking

Specific type designation, input voltage range, nominal output

voltage and current, degree of protection, batch no., serial no.,

and data code including production site, version, and date of

production.

Basic type designation, applicable safety approval and

recognition marks, CE mark, warnings, pin designation,

Power-One company logo.

BCD20023 Rev AB, 02-Nov-2010

Page 2 of 31

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T Series Data Sheet

500 Watt AC-DC Converters

®

The inhibit signal and the T failure signal are transferred by a

second signal transformer (no opto-couplers are used !).

Functional Description

The T Series AC-DC converters are primary controlled with a

constant switching frequency of 65.5 kHz. The power factor

corrected single step conversion of the line input voltage to a

low output voltage results in extremely high efficiency.

System Good and Output OK are each indicated by a green

LED; inhibit and T System Failure by a red LED.

System Good and Power Down are available as open collector

signals at the connector. The threshold level of the Power

Down signal can be externally adjusted at the D set input.

The input voltage is fed via input fuse, filter, and rectifier to the

main transformer. The wideband input filter with small input

capacitance generates virtually no inrush current. Transient

suppressors protect the converter against overvoltage and

surges. An auxiliary converter generates an internal supply

voltage for the primary control logic. The input voltage

waveform is sensed by the primary control logic to provide

active power factor correction.

Test sockets at the front panel allow for the measurement of

the output voltage.

The battery charger version provides additional features to

control the output voltage. To set it to different battery float-

charge voltages, a 16-step selector switch (Z) is standard.

A control input to control the output voltage by an external

temperature sensor is available at a control pin. A trim-

potentiometer allows fine adjustment of the output voltage.

The main transformer is connected to a rectifier, large output

capacitors, and an efficient output filter, which ensures low

output ripple and spikes, and provides the necessary hold-up

time. The output voltage is fed back to the primary control logic

via a signal transformer.

+

–

03043a

C_y

12

14

Vo+

Fuse

4

6

L~

16 HC+

18 HC –

NTC

N~

20 Vo–

22 Vo–

C_y

Auxiliary

converter

C_y

8

10

24

26

Sys In

Voltage

and

system

monitor

Sys Out

Control

logic

28 i/Vcr

30

32

D

D set

Z

P

Fig. 1

Block diagram

BCD20023 Rev AB, 02-Nov-2010

Page 3 of 31

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T Series Data Sheet

500 Watt AC-DC Converters

®

Electrical Input Data

General condition: T_A= 20 °C

Table 2a: Input data of LT models

Input

LT12xx

typ

LT17xx

LT18xx

typ max

Unit

Characteristic

Conditions

min

max min typ max min

V_i

Operating input voltage range

with full output power

47 – 63 Hz ²

155

255 155

255 130

255 VAC

V_{i red}

Operating input voltage range

with reduced output power ¹

85

155 85

130

V_i(V_{i nom}) Rated (nominal) input voltage

50 – 60 Hz ²

100

(230) 240 100 (230) 240 100 (230) 240

I_{i nom}

I_{i L}

Nominal input current

Input current limit

V_{i nom}, P_{o nom}

1.9

3

2.6

4

2.2

4

A

P_{i 0}

P_{i inh}

PF

C_i

No-load input power

Input power when inhibited

Power factor

V_{i min}– V_{i max}, I _o= 0

6

3

8

3

8

3

W

V_{i min}– V_{i max}, inhibit = low

V_{i nom}, I_{o nom}

96

98

%

µF

ms

Input capacitance ³

4

400

B

4

400

A

4

400

B

t_on

Switch on delay

V_{i nom}, P_{o nom}

Conducted emissions

Radiated emissions

V_{i nom,}V_{o nom,}I_{o nom}

EN55022

B

V_{i p}

V_{i L}

Input overvoltage protection ⁴

Input undervoltage lockout

264

65

264

65

264

65

VAC

Table 2b: Input data of UT models

Input

UT12xx

typ

UT17xx

typ

Unit

Characteristic

Conditions

min

max

min

max

V_i

Operating input voltage range

with full output power

47 – 63 Hz ²

95

140

95

140

VAC

V_{i red}

Operating input voltage range

with reduced output power ¹

70

95

70

100

125

V_i(V_{i nom}) Rated (nominal) input voltage

50 – 60 Hz ²

100

(110)

3.8

3

125

100

(110)

5.2

4

I_{i nom}

I_{i L}

Nominal input current

Input current limit

V_{i nom}, P_{o nom}

A

P_{i 0}

P_{i inh}

PF

C_i

No-load input power

Input power when inhibited

Power factor

V_{i min}– V_{i max}, I_o= 0

6

3

8

3

W

V_{i min}– V_{i max}, inhibit = low

V_{i nom}, I_{o nom}

98

%

µF

ms

Input capacitance ³

4

400

B

4

400

B

t_on

Switch on delay

V_{i nom}, P_{o nom}

Conducted emissions

Radiated emissions

V_{i nom,}V_{o nom,}I_{o nom}

EN55022

B

V_{i p}

V_{i L}

Input overvoltage protection ⁴

Input undervoltage lockout

165

65

165

65

VAC

1

See Output Power Limitation

Contact Power-One for operation with other input frequencies or different waveforms !

Inrush current stays factor 10 below ETS 300132-1.

2

3

4

In the case of an overvoltage, the converter switches temporarily off, resulting in reduced output power.

BCD20023 Rev AB, 02-Nov-2010

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T Series Data Sheet

500 Watt AC-DC Converters

®

Input Fuse

mA/W

3.5

04026a

An input fuse (5 × 20 mm) in series with the input line (L)

inside the converter protects against severe defects; see also

Safety and Installation Instructions. For applications with

accessible fuse, see Option F.

3.0

2.5

2.0

1.5

1.0

0.5

0

Table 3: Fuse Type

Series

LT

Schurter type

Part number

0001.1012

0001.2514

Limit class D according

to IEC/EN 61000-3-2

SPF 6.3 A, 250 V

SPT 10 A, 250 V

UT

Inrush Current

The converters exhibit an input capacitance of only 4 µF,

resulting in a low and short peak current, when the converter

is connected to the mains. During switch-on, the converter

current can rise up to the input current limit I_{i L}.

3

5

7

9

11

13 15

17 Harm.

Fig. 3

Harmonic distortion at input LT1740-7Z, V_i= V_inom, I_o= I_{o nom}

As a direct result of the low and short inrush current and

controlled charging procedure of the output capacitors, the

converter can be hot swapped. The LT inrush current is a

factor 10 smaller than defined in the ETS 300132-1 standard

for Telecom systems. However the converter should be

plugged-in smoothly, giving time to the output capacitors to be

charged.

mA/W

3.5

04025a

3.0

Limit class D according

to IEC/EN 61000-3-2

2.5

Input Under-/Overvoltage Lockout

2.0

1.5

1.0

0.5

0

If the specified input voltage range V_iis exceeded, the

converter stops operation temporarily resulting in reduced

output power and increased RFI. The input is protected by

varistors. Continuous overvoltage will destroy the converter.

If the sinusoidal input voltage stays below the input under-

voltage lockout threshold V_i, the converter will be inhibited.

3

5

7

9

11

13 15

17 Harm.

Power Factor, Harmonics

Power factor correction PFC is achieved by controlling the

input current waveform synchronously with the input voltage.

Fig. 4

Harmonic distortion at input UT1740-7Z, V_i= V_inom, I_o= I_{o nom}

PF

1.00

04023a

04024a

0.96

0.98

0.96

0.94

0.92

0.90

0.88

0.86

0.84

0.82

I_o[A]

0.94

0.92

0.90

0.88

0.86

0.84

0.82

I_o[A]

0

2

4

6

8

10

12

14

16

0

2

4

6

8

10

12

14

16

UT1740-7Z at V_i= 110 VAC

LT1740-7Z at V_i= 230 VAC

V_i= 110 VAC

U_i= 230 VAC

Fig. 2

Power factor

Fig. 5

Efficiency versus load of LT1701

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T Series Data Sheet

500 Watt AC-DC Converters

®

PFC is active in all operating conditions (voltage regulation,

output power limitation, current limitation).

Efficiency

The extremely high efficiency (see fig. 5) is achieved by using

a single-step power factor corrected topology together with the

most advanced technology in power conversion. It allows a

very compact design in a fully enclosed case without forced

cooling.

The power factor control also works with different input voltage

waveforms and frequencies. For special applications with

different frequencies or non-sinusoidal waveforms, please

contact Power-One.

Electrical Output Data

General conditions:

• T_A= 20 °C, unless specified.

• V_i= 230 VAC, f_i= 50 Hz

Table 4: Output data of rectifier versions

Output

LT/UT1201

LT/UT1701

LT1702

Unit

Characteristic

Conditions

min typ max min typ max min typ max

V_{o set}

Output voltage adjustment

V_{i nom}

24.25

54.5

48.0

V

I_o= 0.5 • I_{o nom}

V_{o set tol}V_osetting tolerance

24.0

24.5 54.25

24.95 52.8

54.75 47.75

55.8 46.3

48.25

49.3

V_o

Output voltage over input voltage and load ¹

V_{i min}– V_{i max}

,

23.35

(0.01 – 1) • I_{o nom}

V_{o L}

α_Vo

I_{o nom}

I_{o L}

Overvoltage protection by second control loop

Temperature coefficient of output voltage

Nominal output current

32.5

59.3

–5

16

–5

10

–5

11

mV/K

A

Current limit ²

V_o= 20 V

18 ⁴

400

850

40

14.5

550

1000

40

14.5

550

1000

40

P_{o L}

v_o

Output power limit ²

V_{i nom}

W

Output voltage noise

Low frequency I_{o nom}

mV_pp

IEC/EN 61204

BW = 20 MHz

Switching freq.

Total

900

1000

1100

∆V_{o I}

Static load regulation (droop) ¹

Static line regulation

(0.01 – 1) • I_{o nom}

– 0.6

– 1.2

V

∆V_{o V}

V_{i min}– V_{i max}

,

0.3

0.8

I_{o nom}

V_{o d}

t _d

Dynamic load regulation ³

Voltage deviation V_{i nom}

1.7

2.2

0.1•I_{o nom}↔ I_{o nom}

Recovery time

0.25

s

IEC/EN 61204 ⁵

C_o

Internal output capacitance

86

41

mF

1

Output voltage decreases with rising output current due to the droop characterstic to ease current sharing; see fig. 7.

Due to the large output capacitance, the maximum transient value can be much higher.

Deviation limited by output overvoltage protection

No power limitation, but current limitation

See fig. Dynamic load regulation.

2

3

4

5

BCD20023 Rev AB, 02-Nov-2010

Page 6 of 31

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T Series Data Sheet

500 Watt AC-DC Converters

®

General conditions:

• T_A= 20 °C, unless specified.

• V_i= 230 VAC, f_i= 50 Hz

Table 5: Output data of battery charger versions

Output

LT/UT1240-7Z

LT/UT1740-7Z

LT1840-7Z

Unit

Characteristic

Conditions

min typ max min typ max min typ max

V_{o set}

V_{o set tol}V_osetting tolerance ⁴

Output voltage adjustment ⁶

V_{i nom}

I_o= 0.5 • I_{o nom}

27.25

54.5

40.88

V

27.2

25.25

26.8

26.9

27.3 54.45

28.25 50.5

27.6 53.8

32.5

54.55 40.83

56.5 37.9

55 40.3

56.6

40.93

42.4

41.3

V_o

Output voltage range¹

Output voltage over input

voltage and load ¹

LT

V_{i min}– V_{i max},

(0.01 – 1) • I_{o nom}

UT

V_{o L}

α_Vo

I_{o nom}

I_{o L}

Overvoltage protection by second control loop

Temperature coefficient of output voltage

Nominal output current

59.3

48.4

–3

14.5

20

–3

10

–3

11

mV/K

A

Current limit ²

14.5

550

1000

40

16

P_{o L}

v_o

Output power limit ²

V_{i nom}

400

700

40

450

850

40

W

Output voltage noise

Low frequency I_{o nom}

mV_pp

IEC/EN 61204

BW = 20 MHz

Switching freq.

Total

750

– 0.4

1000

– 0.6

900

– 0.6

∆V_{o I}

Static load regulation (droop) ¹

Static line regulation ¹

(0.01 – 1) • I_{o nom}

V

∆V_{o V}

V_{i min}– V_{i max}

,

0.2

0.35

0.25

I_{o nom}

V_{o d}

t _d

Dynamic load regulation³

Voltage deviation V_{i nom}

1.6

0.2

2.0

0.2

2.5

0.2

0.1•I_{o nom}↔ I_{o nom}

Recovery time

s

IEC/EN 61204 ⁵

C_o

Internal output capacitance

86

41

49

mF

1

V_odecreases with rising output current due to the droop characterstic to ease current sharing; see fig. 8.

Due to the large output capacitance, the maximum transient value can be much higher.

Deviation limited by output overvoltage protection

Defined by temperature sensor, by remote control, and by voltage selector switch

See fig. Dynamic load regulation.

2

3

4

5

6

Output voltage adjustment with V_cr= 9.5 V (2.27 V/cell)

output

voltage

regulation limitation

output

power

output

current

limitation

V_o[V]

Output Characteristic

60

The models T1701/1702 and the battery chargers T1240/

1740/1840 can be operated in 3 different modes:

V_i= 230 V

50

40

30

– Output voltage regulation

– Output power limitation

– Output current limitation.

V_i= 110 V

V_i= 100 V

Caution: In output power or current limitation mode, the max.

ambient temperature T_Ashould not exceed 65 °C with free air

convection cooling.

V_i= 90 V

20

10

The output of all models is fully protected against continuous

short circuit. The maximum constant current is limited to I_{o L}

(see table Electrical output data). As the LEDs indicating the

system status are driven from the output voltage, all LEDs

switch off in the case of a short circuit.

0

I_o[A]

2

4

6

8

10

12

14

16

Fig. 6

Output characteristics LT1701-7 and LT1740-7Z

BCD20023 Rev AB, 02-Nov-2010

Page 7 of 31

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T Series Data Sheet

500 Watt AC-DC Converters

®

Output Overvoltage Protection

V_o

05051a

A slight output voltage overshoot may occur at turn-on, inhibit

release, or during fast load changes. A second, independent

control loop interrupts the operation above V_{o L}and indicate it

by the red warning LED. The output voltage remains below

60 V (SELV) under all operating conditions.

∆V_{o I}

V_o

10% ∆V_{o d}

∆V_{o d}

Note: There is no specific built-in protection against externally

applied overvoltages or transients.

t_d

Output Voltage Regulation (Rectifier Version)

t

I_o/I_{o nom}

The output voltage is adjusted to a fixed value V_{o set}. It relates

to the output current and the input voltage, which ensures

current sharing without further precautions, when several

converters are connected in parallel. Rising output current and

falling input voltage lead to a decrease of the output voltage,

according to the formula:

1

0.9

0.1

Fig. 9

V_o≈V_{o set tol}+ (0.5 – I_o/I_{o nom}) • ∆V_{o l}+ (∆V_i– ∆V_{i nom})/100 V •∆V_{o V}

Typ. dynamic characteristics (at load step)

Output Power Limitation (Rectifier Version)

V_o[V]

Especially for power systems with an output voltage of 48 V,

the rectifier models T1701/1702 exhibit an output power

limitation mode. The output power is kept constant down to an

output voltage of approximately 38 V. This provides improved

start-up capability of power systems including switched-mode

power supplies connected to the output (e.g. 48Q Series). At

maximum load there is no need for a special start-up

procedure.

04027a

54.4

48

38

The maximum input current is limited to I_{i L}. At lower input

voltage V_{i red}the maximum output power is limited to:

24

P_o≈ η • V_{i red}• I_{i L}(η = efficiency approx. 90%)

T1201 models have no output power limitation mode.

Pulse Loading (Rectifier Version)

I_o

To prevent the output and filter capacitors from overload, the

superimposed AC ripple current at the output should be limited

as shown in the figure below. For high-current pulse loads,

external capacitors are recommended.

0

14.5 16 A

10 11

T1201

T1701/1702

Fig. 7

Output characteristic of T1201 and T1701/1702 (typ.). The

droop is shown in fig. 8.

I_{o PL}[A]

05050a

15

10

5

V_i= V_{i nom}

Average output current = I_{o nom}

∆V_o

05081a

2%

1%

T_C= 50° C

V_{o set}

–1%

–2%

I_o/I_{o nom}

T

_C= T_{C max}

0

f

_PL[Hz]

100

1 k

10 k

50

0.01

0.5

1

Fig. 10

Fig. 8

Maximum AC ripple output current superimposed on the

average output current I_{o nom}for LT1701.

Typical output droop (LT 1701)

BCD20023 Rev AB, 02-Nov-2010

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T Series Data Sheet

500 Watt AC-DC Converters

®

Output Voltage Regulation (Battery Charger)

∆V_o

05046a

In normal operating mode (neither in power limitation nor in

current limitation) the output is regulated by a voltage feedback

1.1%

loop. It is adjusted to V

selector switch to the appropriate float charge voltage of the

battery.

and can be set by the cell voltage

o set

0.55%

V_{o set}

A control input (pin 28) allows for adjustment of the output

voltage either by a voltage source, a temperature sensor, or an

external potential divider (see External Output Voltage

Control). For fine tuning, the converter is fitted with a trim

potentiometer accessible from the rear side.

– 0.9%

I_o/I_{o nom}

0.01

0.5

1

Fig. 12

Typical output droop T1240/1740/1840

The output voltage relates to the output current and the input

06065a

V_o

voltage, which ensures current sharing without further

precautions, when several converters are connected in

parallel. An increase in output current and a decrease in input

voltage decrease the output voltage, according to the formula:

28.25 V

26.7 V

25.25 V

19 V

V_o≈V_{o set tol}+(0.5 – I_o/I_{o nom}) • ∆V_{o l}+ (∆V_i– ∆V_{i nom})/100 V • ∆V_{o V}

The dynamic characteristic is shown in fig. 9.

I_o

0

Output Power Limitation (Battery Charger)

15 A

20 A

All battery charger versions exhibit an output power limitation

mode, where the output power is kept constant from 2.35 V/cell

(for lead acid batteries) to 1.6 V/cell.

Fig. 11a

Output characteristic of T1240 (typ.). The droop is shown in

fig. 12.

06066a

V_o

The maximum input current is limited to I_{i L}. At lower input

voltage V_{i red}, the maximum output power is limited to:

56.5 V

54.5 V

50.5 V

P_o≈ η • V_{i red}• I_{i L}(η = efficiency approx. 90%).

38 V

Inhibit (Rectifier Version)

The rectifier version converters are equipped with a simple

inhibit function (with no adjustment of V_o). The converter is

enabled by a logic high signal and disabled by a logic low

signal. This input is TTL/CMOS compatible, a resistor <50 Ω

disables the converter, a resistor >30 kΩ enables it. The

switch-on time t_r, i.e., the time delay between powering until

the full output power is available, is typically 100 ms.

I_o

0

10 A 14.5 A

Fig. 11b

The hold-up time at the output after inhibiting depends on the

load, the internal and external capacitance at the output.

Output characteristic of T1740 (typ.). The droop is shown in

fig. 12.

Note: The inhibit input is protected against overvoltage up to 60 V.

V_o

06067a

Table 6: Characteristics of the inhibit signal

42.4 V

40.88 V

Characteristics

Conditions min typ max Unit

37.9 V

V_inhInhibit

V_o= on V_{i min}– V_{i max}2.5

_{C min}– T_{C max}

60

V

kΩ

V

voltage

T

28.5 V

R_inhResistance V_o= on

30

to Vo–

V_inhInhibit

V_o= off

–0.7

0.4

50

voltage

I_o

0

R_inhResistance V_o= off

Ω

16 A

11 A

t_r

Switch-on time

until full power avail.

V_{i nom}

100

3

ms

Fig. 11c

P_inhInput power with

W

Output characteristic of LT1840 (typ.). The droop is shown in

fig. 12.

inhibited unit

BCD20023 Rev AB, 02-Nov-2010

Page 9 of 31

www.power-one.com

T Series Data Sheet

500 Watt AC-DC Converters

®

06116a

Note: The table Hold-up time also informs about the warning time

of the Power Down signal. For example, if the threshold level V_tof

the Power Down signal is set to 43 V and the minimum acceptable

voltage of the load is 38 V, the time between the activation of the

power-down signal and the switch-off of the load (550 W) will be

15 ms (= 55 ms – 40 ms).

4

6

12

28

L~

Vo+

I_inh

V_inh

i/Vcr

Converter

N~

22

Vo–

Series and Parallel Connection

The output of the T Series converters may either be connected

in series or in parallel.

Fig. 13

Inhibit connection

Connection in parallel: Current sharing between paralleled

converters is ensured by the output droop (slope)

characteristic.

Hold-Up Time

Note: Several Txx40 battery chargers connected in parallel can be

controlled by a single voltage source or a single sensor wired to

the inputs i/Vcr.

The hold-up time depends upon the output voltage at the time

of failure, the minimum acceptable output voltage, and the load

according to the formula:

Connection in series: A maximum of two T Series converters

may be connected in series, however the resulting output

voltage of up to 110 V would no longer be SELV.

2

V_o²– V_o

t_hold= ––––––––^m–ⁱ–ⁿ–^v– • (C_o+ C_ext

2 • P_o

)

where:

V_o

= Output voltage at the moment of mains’ failure

V_ominv= Minimum acceptable output voltage

P_o

C_o

= Average output power during hold-up time

= Internal output capacitance

C_ext

= External output capacitance

Examples of t _holdare given in the table below:

Table 7: Hold-up time t_holdfor T1701

V_o= 54 V

P_o[W]

V_{o min v}

43 V

Unit

46 V

40 V

38 V

100

200

300

400

500

550

164

82

55

41

33

30

219

109

73

55

44

270

135

90

67

54

302

151

101

75

60

55

ms

40

49

V

mains' failure

05049a

V_o

V_t

low load

heavy load

V_{o min v}

t

warning time

t_hold

Fig. 14

Hold-up and warning time with Power Down output signal.

BCD20023 Rev AB, 02-Nov-2010

Page 10 of 31

www.power-one.com

T Series Data Sheet

500 Watt AC-DC Converters

®

06068

2.23 V

2.24 V

Control Features of the Battery Chargers

2.25 V

0

According to the recommendations of battery manufacturers,

the float-charge voltage of lead-acid batteries should be

temperature-compensated. Depending on the battery type and

size, charging with different temperature coefficients may be

required. An excessive float-charge voltage may damage the

battery through overcharging.

2.26 V

2.27 V

2.28 V

4

2.35 V

C

8

2.29 V

2.30 V

Most lead-acid battery manufacturers recommend cell

voltages between 2.23 V and 2.32 V, with the nominal cell

voltage defined at 20 °C and temperature coefficients per cell

between –3 and –4 mV/K.

2.32 V

2.31 V

Fig. 15

Cell voltage selector switch

The value of the negative temperature coefficient is specified

by the type of T temperature sensor.

Potentiometer for Fine Tuning

The battery chargers are equipped with

a

one-turn

With the cell voltage selector switch Z, the required cell voltage

can be adjusted at the rear of the converter, making the system

flexible to different float-charge voltages. If the selector switch

Z is not applicable, a cell voltage adjustment can also be

provided by the temperature sensor; see Temperature Sensor

T).

potentiometer for fine tuning of the output voltage to within

±3.7⁰/00 of V_o. The potentiometer is protected by a plastic

cover. To adjust the output voltage for improved current

sharing or compensation for voltage drops over the load lines,

each battery charger in a system should be unplugged and

adjusted individually to the same output voltage at equal load;

otherwise current sharing may adversely be affected.

Although it is not recommended, the output voltage can be set

to a fixed value without temperature compensation by an

external voltage source or a resistive voltage divider at the

remote control input, for instance if the battery temperature

shall be controlled by other systems; see External Output

Voltage Control.

External Output Voltage Control

The i/Vcr control input (pin 28) provides two functions:

– External adjustment of the output voltage

– Inhibiting of the converter.

Cell Voltage Selector Switch Z

A voltage <0.4 V inhibits the output, a voltage >2.5 V enables it.

The battery chargers are equipped with the cell voltage

selector switch at the rear side, which provides an easy way of

external adjustment to the required float-charge voltage. Each

switch position allows a step in the output voltage of 10 mV per

cell, whereby the switch position "0" represents a cell voltage

of 2.23 V at 20 °C; position "C" gives 2.35 V per cell.

With the i/Vcr input in the range of 5.5 V to 11.5 V, the output

voltage V_{o set}can be adjusted within a range of +3.6% to

–7.9%. This feature is optimized to control the float-charge of a

lead acid batteriy.

Outside of the control range, the sensor monitoring circuit

generates a system error signal (see also System Good).

The cell voltage selector switch fits together with the 2.23 V

temperature sensor. The float-charge voltage is set by the

switch, and the temperature coefficient is specified by the

sensor type.

In the case of a excessively high control voltage, the output

voltage is reduced.

The remote control input is protected against DC overvoltage

up to 60 V.

Caution: Setting the switch to the correct battery cell voltage is

vital for the proper operation of a battery system.

Note: An open inhibit/Vcr remote control input leads to a sensor

error signal which is indicated by the Error LED at the front and

high impedance of the "System good" signal. The output voltage is

reduced to V_crfail condition.

Note: Switching to a different cell voltage while the battery charger

is operating may cause a short distortion of the output voltage.

Table 8: Characteristics of the remote control

Characteristics

Conditions

LT/UT1240

typ

LT1840

typ

LT/UT1740

Unit

V_o

Output voltage at:

Voltage selector switch

Z set at 2.23 V/cell or

without selector switch Z

selector switch Z

25.25

37.85

50.5

V

V_crfail 2.5 – 5.5 V

V_crcontrol 5.5 – 11.5 V

V_crclamp 11.5 – 14 V

V_crfail 14 – 60 V

22.5 + V_cr• 0.5

45 + V_cr

56.5

50.5

1

28.25

25.25

1

42.37

37.85

1

V_{i nom}, 0.5 • I_{o nom}

R_cr

f_cr

Input impedance

MΩ

Frequency limit

1

Hz

BCD20023 Rev AB, 02-Nov-2010

Page 11 of 31

www.power-one.com

T Series Data Sheet

500 Watt AC-DC Converters

®

Table 9: Characteristics of the inhibit signal

Characteristics

Conditions

min

2.5

typ

max

Unit

V

V_inh

R_inh

V_inh

R_inh

t_r

Inhibit voltage

V_o= on

V_o= off

VU_o= off

V_{i min}– V_{i max}

T_{C min}–T_{C max}

,

60

Resistance to Vo-

Inhibit voltage

30 k

– 0.7

Ω

0.4

50

V

Resistance to Vo-

Ω

Switch on time until full power available

Input power at inhibited converter

V_{i nom}

100

3

ms

W

P_inh

V_o[V]

06069a

T1240

T1740

T1840

V_cr= V_o– 45 V

V_cr= ⁴/₃• V_o– 33.7 V

V_cr= 2 • V_o– 45 V

(T1740)

(T1840)

(T1240)

56.5

28.25 42.37

V_o• R₂

V_cr= ––––––––

(R₁+ R₂)

55

54

53

52

41

27

R₂: Value with 1 MW internal resistance in parallel with R.

It is mandatory that:

39

26

(R₁• R₂)

––-–-–--–– > 35 kΩ

(R₁+ R₂)

50.5

25.25 37.85

otherwise the converter might not be able to start.

Control by an external voltage source

V_cr

5 5.5

11.5 14 16 V

3

4

Logic level of

the signal

05062a

System Good

28

i/Vcr

+

–

Ext. voltage

source

5.5 – 11.5 V

V_cr

5.3 V

14 V

22

Vo–

Fig. 16

Output voltage V versus control voltage V_cr, with the

o

corresponding signal System Good

If the voltage selector switch Z is not set at 2.23 V per cell, the V_cr

fail voltage rises accordingly.

Fig. 18

Voltage setting by an external voltage source

The inhibit input of battery charger models is not TTL/CMOS

compatible and should be triggered by a switch, a relay, or an

open-collector transistor.

Control by the temperature sensor T

The temperature sensor provides a temperature-compensated

charging process for lead-acid batteries; see Accessories,

Temperature Sensor T.

Control by external resistors

With a resistive potential divider or a potentiometer connected

to the remote control input, a fixed output voltage can be

programmed:

05063a

V_o+

12

Vo+

R₁

R

i/Vcr

28

V_cr

22

R₂= 1 MΩ • R/(1 MΩ + R)

V_o–

1 MΩ

Vo–

Fig. 17

Voltage setting by external resistors

BCD20023 Rev AB, 02-Nov-2010

Page 12 of 31

www.power-one.com

T Series Data Sheet

500 Watt AC-DC Converters

®

With option D, the output voltage can be sensed externally, for

example, to monitor the system bus decoupled from the power

supplies by diodes or fuses. An external resistor of 43.2 kΩ 1%

(21.5 kΩ for T1840) must be fitted into the sense line to the

bus; see fig. below.

Auxiliary Functions

Available Signals and Status Monitoring

The T Series exhibits an inhibit function as well as several

voltage monitoring and indicating functions for easy control

and surveillance of a complete customer-specific power supply

system. All the surveillance functions are driven from the

output. Consequently, it also operates, when the input voltage

is off, down to an output voltage of 5 V. The power consumption

of the surveillance circuit is typically 10 to 20 mA.

06051a

+

–

F

Vo+

12

Vo

–

22

External

adjustment of the

Available functions:

threshold level V

t

R

– Power Down

D

pin 30

pin 32

pin 24

pin 26

pin 28

ext

R

D set 32

D set

Sys In

Sys Out

i/Vcr

43.2 kΩ

(21.5 kΩ)

T1000-7D

– System Good

Fig. 21

– Inhibit/Vcr remote control

Option D (D-set internally not connected); the power down

circuitry monitors the power bus decoupled by the fuse F.

The status is indicated by 3 LEDs on the front panel:

– System

– V_o

– Error

(OK)

green

red

Adjustment of the threshold level

With the resistor (R_ext) connected to D set (pin 32) and Vo– (or

Vo+), the low threshold level can be increased (or decreased)

respectively; see fig. 20 and 21.

Test sockets at the front panel allow easy measurement of V_o.

If the D set input is left open-circuit, the low threshold level of

the power down circuitry is factory-set to:

Power Down Function

The power down circuitry monitors V_oand changes the status

of output D (pin 30) from low to high impedance, when V_ofalls

below the low threshold level, and changes back to low

impedance, when V_oexceeds the upper threshold level.

T12xx:

T17xx:

VT18xx:

V_{t set}= 21 V

_{t set}= 42.5 V

V_{t set}= 32 V

±0.2 V

±0.5 V

±0.4 V

V

The approximate resistor values for given threshold levels can

be calculated from the table below:

The rectifier versions have a relatively small hysteresis of 1 V,

the battery charger versions have a large hysteresis. The

upper threshold level is given, but the low threshold level is

externally adjustable at the D set pin 32. The Power Down

signal D (pin 30) can for example be used as a save data

signal, for low voltage warning, as a low-battery signal to avoid

deep discharge of the battery, or to prevent connected

converters from starting-up at a low bus voltage. For

application examples, see figures below using the signal D.

Table 10: Calculation of R_ext

Model V_t> V_{t set}

(R_extconnected to Vo–)

V_t< V_{t set}

(R_extconnected to Vo+)

T12xx

T17xx

T18xx

463.5

43.2 V_t– 463.5

R_ext(V_t) = –––––––– [kΩ] R_ext(V_t) = ––––––––––––– [kΩ]

V_t–21.0

21.0 – V_t

933

43.2 V_t– 933

R_ext(V_t) = –––––––– [kΩ] R_ext(V_t) = ––––––––––––– [kΩ]

As it is driven from the output, the power pown circuitry

operates independently of the input voltage and the load

conditions, even if the converter is inhibited.

V_t– 42.5

42.5 – V_t

461

21.4V_t– 461

R_ext(V_t) = –––––––– [kΩ] R_ext(V_t) = ––––––––––––– [kΩ]

V_t– 32

32 – V_t

The standard version monitors V_ointernally; see fig. below.

The threshold level is adjusted for a DC output voltage. If in

operation sinusoidal low frequency output ripple is

superimposed to the DC output voltage, it can be estimated

with V_ov= I_o/(2 • π • f • C_o), where C_ois the internal output

capacitance.

06050a

+

–

a

Vo+

R_int

Vo

–

43.2 kΩ

(21.5 kΩ)

Table 11: Typ. values for R_extfor a given V_tvalue for LT1740

R_ext

Characteristics

Conditions

V_t

Unit

D set

External adjustment of

V_tPower down threshold 69 kΩ to Vo+

34.4

36.4

39.5

42.5

45.5

48.5

51.6

V

the threshold level V

t

level,

106 kΩ to Vo+

254 kΩ to Vo+

left open-circuit

309 kΩ to Vo–

154 kΩ to Vo–

102 kΩ to Vo–

set by R_ext

Fig. 20

Standard version; the power down circuitry monitors directly

V_ovia R_int. R_extis not necessary.

BCD20023 Rev AB, 02-Nov-2010

Page 13 of 31

www.power-one.com

T Series Data Sheet

500 Watt AC-DC Converters

®

06053

Upper threshold level

Vo+

The upper threshold level of the power down function is given.

D

The rectifier models have a relatively small hysteresis of 1 V to

prevent the signal from oscillation.

Vo–

The battery chargers have a larger hysteresis. The upper level

is set at 2.05 V/cell.

R

ext

D set

To avoid deep discharge of the battery, the load should be

disconnected from the battery at the low level of the power

down signal. The battery voltage will then recover slowly up to

its chemical equilibrium, about 2 V/cell. The load may not be

connected again to the battery, until the T converter is

operating and charging it. Then the output voltage will be

higher than 2.05 V/cell.

Fig. 23

Power down function (D output)

– External adjustment of threshold level V_t

– Signal electrically isolated by an external relay

06054

High level of output signal D (pin 30):

Vo+

LT/UT1240:

LT/UT1840:

LT/UT1740:

24.6 V

49.2 V

43.9 V

±0.3 V

±0.5 V

±0.4 V

R

D

red LED

Vo–

LED is "ON"

in case of

power down

V_Bat

06052a

V_float

Battery

recovery

Load switch ON

Fig. 24

2.05 V/cell

2.0 V/cell

Remote indication of signal D by LED

Hysteresis

Power Down

V_t

06055

+5 V

Load switch OFF

Battery

low

Vo+

t

Mains failure

Return of mains

R

Z

D

Power down signal

high

low

t

CMOS, TTL

Vo–

Fig. 22

Hysteresis of D output signal for battery chargers with

corresponding level of Power Down signal

Fig. 25

Remote indication of the output voltage status (output D) by

CMOS/TTL interface (e.g., for data saving)

Signal output characteristics

Output D (pin 30) is an open-collector signal, referenced to

Vo–, protected by a 62 V Zener diode; it is well suited to drive

an external relay.

06056a

Vo+

12

Vi+

Under normal operating conditions (V_o> V_t), output D has low

impedance. If the output voltage drops below the power down

threshold level, output D becomes high impedance.

10 kΩ

0.5 W

PSK/PSS/PSx

LT/UT

D

30

22

i

Table 12: Characteristics of power down functions

Vo–

Gi–

Characteristics

Conditions

min typ max

Unit

I_DOutput

T_{C min}– T_{C max}

50 ¹

mA

sink current

Fig. 26

V_satSaturation voltage I_D= 50 mA

V_zZener voltage

0.2

62

V

Output D signal used as inhibit to enable a system start-up in

the case of subsequently connected step-down converters

PSK/PSS/PSx with low start-up voltage. (For 48Q/CQ units,

no pull-up resistor is required.)

P_zZ-diode P_Loss

T_C= 95 °C

500

mW

¹To be limited to 50 mA by the external circuitry.

BCD20023 Rev AB, 02-Nov-2010

Page 14 of 31

www.power-one.com

T Series Data Sheet

500 Watt AC-DC Converters

®

Table 13: Characteristics of System Good input and output

Characteristics

Conditions

V_{i min}– V_{i max}

T

_{C min}– T_{C max}

min

typ

max

Unit

µA

V

I_Trig

V_Trig

I_Trig

V_Trig

I_sys

V_sat

V_Z

Trigger level for logic

low input (= System OK)

current-driven

voltage-driven

current-driven

voltage-driven

100

– 0.4

6.2

Trigger level for logic

high input (= System Failure)

0

A

>7.5

60

50

V

Output sink current ¹

mA

V

Saturation voltage

I_{Sys Out}= 50 mA

T_C= 95 °C

0.2

Zener voltage protection diode

Power disipation Zener diode

62

P_Z

500

mW

1

To be limited to 50 mA by the external circuitry.

System Good Function

06057

The Sys Out signal (pin 26) provides information about the

general function of the converter. It can be used to monitor the

status of a single T Series converter, or can be linked with other

signals within a power system to drive one single-logic signal

for the status of the whole system by connecting the output Sys

Out of one converter to the input Sys In (pin 24) of the next one.

Low voltage (impedance) of the input and output has the

meaning of "system good". The first input of the system has to

be connected to Vo–.

Vo+

Logic high if no internal

error and no inhibit

I_{Sys Out}

Logic AND

Sys Out

Ref.

+

I_{Sys In}

-

Sys In

Logic high if

_{Sys In}> 100 mA

I

The signal Sys Out is activated (low impedance), if the

following conditions are met:

Vo

-

No external fault

– the Sys In signal (pin 24) is logic low,

AND:

Fig. 27

Equivalent circuit of Sys In and Sys Out

No faults monitored by the T Series converter, such as:

– Input overvoltage

Signal output

– Input undervoltage (mains failure)

– Output overvoltage

– Output short circuit

The signal Sys Out (pin 26) has the meaning of “system good”.

It is built by an open collector transistor referenced to Vo–,

protected by a 62 V Zener diode.

– Internal overtemperature

– Internal circuit fault.

06060

– i/Vcr input error such as voltage < 2.5 V (rectifier type);

control voltage out of range 5.3 V > V_cr> 14 V (battery

charger), or sensor not connected, open remote control

input.

Vo+

Sys Out

No external free-

wheeling diode across

Signal input

relay necessary

The input Sys In (pin 24) can be voltage- or current- driven. To

trigger the internal comparator, the voltage at the Sys In pin

has to be <6.2 V, if voltage-driven. If current-driven, the sink

current to Vo– has to be >100 µA. An easy way to drive this

input is achieved by means of an open collector transistor, or a

10 V CMOS interface.

Vo–

Fig. 28

System status signal electrically isolated by an external relay

Note:If only the internal status of a T Series converter should be

monitored, Sys In has to be connected to Vo–.

BCD20023 Rev AB, 02-Nov-2010

Page 15 of 31

www.power-one.com

T Series Data Sheet

500 Watt AC-DC Converters

®

To achieve a logic AND function of the Sys Out and D, connect

the D output with the Sys Out. This combination generates an

output signal only in the case of severe system errors. Only a T

system fault together with a simultaneous power down of the

output voltage will cause this output signal to become high

impedance.

Series and Parallel Connection of Power Down and

System Good

To achieve a logic-OR function of the signals Sys Out and D,

connect the D output to Sys In. The desired function is then

obtained from the Sys Out output. The output signal becomes

high, if the output voltage is lower than the threshold of the

power down circuit, inhibit is applied, or an internal error has

occurred.

06061a

06062a

Vo+

Vo–

Vo+

LT/UT

Vo–

Sys In

R

Sys Out

Internal

signals

Internal

signals

i/Vcr

D

i/Vcr

D

Vo+

D set

Fig. 31

Sys out and D connected in parallel.

Fig. 29

Sys out and D connected in series. The output signal will

indicate an error at start-up.

1 kΩ

Out OK

circuit

20 V

48Q/CQ

no. 1

06059a

Sys In

24

Vo+

12

Vo+

12

Sys In

24

1 kΩ

Sys Out

26

Out OK

circuit

26

Overall

System

Good

20 V

48Q/CQ

no. 2

Vo–

22

Vo–

22

Vo–

22

Vo–

22

LT/UT

1 kΩ

Out OK

circuit

20 V

48Q/CQ

no. x

Fig. 30

Wired AND of isolated open collector signals (e.g. the OUT OK signal of 48/CQ units) with the Sys Out

signals of T units in series to achieve one signal about the status of the whole system

BCD20023 Rev AB, 02-Nov-2010

Page 16 of 31

www.power-one.com

T Series Data Sheet

500 Watt AC-DC Converters

®

Table 14: System monitoring.

Signal status and LED display status depending on the situation of the various system elements

Possible Situation

Open collector output

LED

V_oOK

on

System Good Power Down Sys OK

Error

off

All OK

low

on

off

2

3

2

No mains and battery OK or no mains and V_o> V_t

Unit inhibited and battery OK or unit inhibited and V_o> V_t

Internal error

high

on

Sys In input

high

low

high

low

off

on

off

on

off

on

off

on ¹

off

No mains and battery low or no mains and V_o< V_t

Short circuit on LT/UT output, V_o< 4 V

Current limit LT/UT output, V_o> 4 V, V_o< V_t

Battery chargers: sensor not connected or out of range

2

on

high

on

1

LED is on until the output capacitors are discharged.

Sys In connected to Vo–.

Sys In not connected to Vo– (single T status monitoring) or system status monitoring.

2

3

Display Status of LEDs

LED Sys OK

A green LED corresponds to the signal System Good. It lights,

if no internal or external error is detected.

LED V_oOK

Another green LED indicates the output voltage status,

corresponding to the signal Power Down. The LED lights, as

long as V_oexceeds the upper threshold level and has not

fallen below the low threshold level V_t.

LED Error

This red LED lights, if one or more of the following conditions

are detected:

– Input overvoltage

– Input undervoltage (mains failure)

– Output overvoltage

– Output short circuit

– Output voltage below threshold V_t

– Internal overtemperature

– Internal circuit fault

– i/Vcr remote control input error, such as:

- Inhibit voltage <2.5 V (rectifier models)

- Remote control voltage V_crout of range 5.3 – 14 V

(battery chargers)

- Sensor not connected, open remote control input.

BCD20023 Rev AB, 02-Nov-2010

Page 17 of 31

www.power-one.com

T Series Data Sheet

500 Watt AC-DC Converters

®

battery-buffered bus. Should however the converter already be

connected, when the battery is switched to the bus, the resulting

charge current will not be limited. To avoid having the fuse blow or

a possible arc across the circuit breaker, the battery charger

Different Configurations and Applications

Power Boosting, Redundant Configuration,

Hot Swap

06079a

For redundant configurations the outputs should be decoupled

by ORing diodes, protecting the DC-bus in case of an internal

short circuit at the output of one converter.

LT/UTxx40

D set

LT/UTxx40

D set

Decoupling can also be done using appropriate fuses in the

output path of each converter. If the battery voltage has to be

monitored, choose option D.

R

43k2

R

43k2

(21k5)

06077a

Fuse

Converter

+

–

+

–

Fig. 33

+

–

T xx40 with battery back-up. Power Down signal monitoring

the battery voltage.

Fig. 32

Redundant configuration without battery back-up

should be powered by the mains prior to connecting the battery.

With ORing diodes, no reverse charge current flows from the

power bus into the output capacitors.

ORing diodes provide reverse polarity protection with no

reverse current in case of hot plug-in, but have the

disadvantage of some forward voltage drop.

Battery Size and Ripple Current

Some consideration should be given to the battery size.

According to VDE 0510 part 2, the low frequency ripple current

of the floating charge current should not exceed 5 A per 100 Ah

capacity (0.05 C). The power factor corrected single step

conversion of the line input voltage to the low DC output

voltage generates a ripple voltage at the output of twice the

input frequency, causing a ripple current into the connected

battery.

For battery applications, decoupling with fuses is recom-

mended, since the voltage drop over the diodes would

decrease the battery voltage. In case of an internal short circuit

of a converter, the battery will deliver a very large current

causing the respective fuse to blow. The fuse should be

mounted in the positive power path of the converter, since the

monitoring signals are referenced to the negative path. The

fuse type should be suitable for DC application having a

current rating of 20 A or more with high breaking capability,

e.g., Littlefuse, series 314.

06081b

To enable hot plug-in in systems decoupled with fuses, the T

Series converters are fitted with an NTC resistor, limiting the

reverse current flowing into the discharged output capacitors

(see Functional Description).

T1701/1702

V_o= 56 V

Load

For this purpose HC+ (pin 16) and HC– (pin 18) have to be

connected to Vo+ and Vo– respectively; see fig. 33. Since pins

16 and 18 are leading pins, the output capacitors are

precharged through the internal NTC resistor, before any other

pin makes contact. This protects the connector and prevents

the DC bus voltage from dropping during hot plug-in. Hot swap

should be done gently. Subsequent hot-swap actions should

be avoided. After disconnecting an operating converter, it

should be cooled down prior to reconnecting to the bus to

avoid damage of the fuse or the converter.

T1701/1702

V_o= 56 V

T1740-7D

+

Battery

V_orange:

–

50.5 – 56 V

Fig. 34

Note: The internal NTC limits the reverse charge current flowing

Configuration for a larger system with only a small battery

into the output capacitors, when the converter is plugged into a

BCD20023 Rev AB, 02-Nov-2010

Page 18 of 31 www.power-one.com

T Series Data Sheet

500 Watt AC-DC Converters

®

threshold level of Power Down. This prevents further

discharge of the battery.

For systems, where only a small battery back-up time is

required, battery charging by one T unit may be sufficient; see

also fig. below.

Caution: Lead-acid batteries can generate certain amounts of H₂

and O₂gas, which can form explosive gas mixtures. Sufficient

ventilation must be provided in battery cabinets and installation

rooms.

–

+

06083a

+

–

48Q/CQ

Note: Local regulations must be observed. Further information

about designing battery systems is contained in VDE 0510, part 2.

Out OK–

Out OK+

i

Fuse

Vo+

–

+

Combination with DC-DC Converters

HC+

+

HC–

Vo–

The T Series converters are designed to be operated with

DC-DC converter loads. Particularily suitable are 48Q

models, as they start working at approx. 38 V, thus avoiding

high currents at ramp-up. But also other series may be used,

for instance our CQ or P Series.

48Q/CQ

–

Out OK–

Out OK+

i

L

N

–

+

D

N

In a complete power system consisting of several T converters

connected in parallel combined with 48Q/CQ units, it may be

desirable to have one common signal indicating the status of

the whole system.

R

+

48Q/CQ

Sys Out

–

Out OK–

Out OK+

i

Sys In

D set

The DC-DC converters provide a galvanically isolated signal

Out OK. To obtain a logic AND, all Out OK signals should be

connected in series; see fig. below:

–

i/Vcr

43.2 kΩ

R_ext

+

–

If in a system with 2 redundant T Series converters Power

Down is desired as one common signal, simply connect the D

pins of the two T converters. Then, Power Down only becomes

active, if both T converters fail, which would result in the bus

voltage failing (see fig. below).

Temp. sensor T

Fig. 36

–

+

Disconnecting the loads at low battery voltage in case of

mains’ failure

06082a

48Q/CQ

L

N

Vo+

Vo–

+

–

+

Out OK–

Out OK+

Storing the System Good Signal

–

+

–

+

–

R

For battery back-up systems located in inaccessible areas it

could be of interest to know, whether there has been a Power

Fail (interruption of the mains). To obtain this information, Sys

Out should be connected to Sys In with a reset button

connected to Vo–. In this way a system failure like an

interruption of the mains will be stored at Sys Out until, the

reset button is pressed.

Sys Out

Overall

System

Good

Sys In

D

48Q/CQ

+

–

Out OK–

Out OK+

L

R

N

Power

Down

Sys Out

D

48Q/CQ

+

–

Out OK–

Out OK+

Vo+

Vo–

+

–

06084a

L

Fuse

N

48Q/CQ

+

–

Vo+

HC+

HC–

Vo–

+

–

Sys In

–

+

L

Fig. 35

N

Overall System Good and Power Down signal in a redundant

system

R

Sys Out

Sys In

+

–

Stored

Sys Out

Low-Battery Discharge Protection

i/Vcr

Temp. sensor T

Since all monitoring functions are powered by the output of the

T converter or the battery, in the case of a mains’ failure, Power

Down can be used to monitor the status of the battery and to

disconnect the load or part of it via the inhibit of the connected

DC/DC converters, when the battery voltage drops below the

Reset

Fig. 37

Storing the System Good signal

BCD20023 Rev AB, 02-Nov-2010

Page 19 of 31

www.power-one.com

T Series Data Sheet

500 Watt AC-DC Converters

®

06085a

+5.1 V, 64 A (48 A*)

48Q/CQ

* For redundancy,

decoupling at the 48Q/CQ-

outputs with diodes is required.

48Q/CQ

24 V, 8 A

(4 A*)

12 V, 16 A

(8 A*)

48Q/CQ

N L

Fuse

T1740-7DZ

Back-up

battery

48 V

+

–

Temp. sensor

48 V power bus (SELV)

(50.5 to 56.5 V)

System

controller

power down

DC bus good

output good

Fig. 38

UPS uninteruptable

power supply system

±12 V, 4 A

+5.1 V, 32 A

+24 V, 5 A

48Q/CQ

1001

06086a

48Q/CQ

1001

48Q/CQ

2320

PSB

245

Vo+

T1701

L

N

Vo–

48 V power bus (SELV)

(53 to 56 V)

System

controller

power down

DC bus good

output good

M

Cooling fan

Lamps

PCB heating

Fig. 39

Front end with various loads (example)

BCD20023 Rev AB, 02-Nov-2010

Page 20 of 31

www.power-one.com

T Series Data Sheet

500 Watt AC-DC Converters

®

protection against input transient voltages, which typically

occur in most installations, but especially in battery-driven

mobile applications. The T Series has been successfully

tested to the following specifications:

Electromagnetic Compatibility (EMC)

A suppressor diode or a metal oxide VDR (depending on type)

together with an input fuse and an input filter form an effective

Electromagnetic Immunity

Table 15: Immunity type tests

Phenomenon

Standard

Level

Coupling

mode

Value

applied

Waveform

Source

imped.

Test

procedure

In

Perf.

1

oper. crit. ²

Electrostatic

discharge

(to case)

IEC/EN

61000-4-2

4

contact discharge 8000 V_p

1/50 ns

330 Ω

10 positive and

10 negative

discharges

yes

A

air discharge

15000 V_p

Electromagnetic

field

IEC/EN

61000-4-3

3

antenna

10 V/m

AM 80%

1 kHz

n.a.

26 – 1000 MHz

yes

A

Electrical fast

transient/burst

IEC/EN

61000-4-4

4

capacitive, o/c

2000 V_pbursts of 5/50 ns 50 Ω

60 s positive

60 s negative

transient per

coupling mode

2.5/5 kHz over

15 ms; burst

period: 300 ms

direct,

±i/c, +i/–i

±4000 V_p

Surge

IEC/EN

61000-4-5

3

±i/c

±2000 V_p

1.2/50 µs

12 Ω

2 Ω

5 pos. and 5 neg.

surges per coupling

mode

yes

B

A

+i/–i

Conducted

disturbances

IEC/EN

61000-4-6

i, o, signal wires

10 VAC

(140 dBµV)

AM 80%

1 kHz

150 Ω

0.15 – 80 MHz

1

i = input, o = output, c = case.

A = Normal performance, B = Temporary loss of function or degradation of performance, not requiring an operator.

2

Electromagnetic Emission

chromatized 19" rack, fitted with a front panel. For converters

mounted otherwise, e.g., wall-mounted with option B1 (base

plate), the radiated noise may be above level A.

The radiated noise in the frequency range of 30 MHz to

300 MHz on the input- and the output-side stays below class A

according to EN 55011/22 measured with an antenna.

The radiated noise of the T converters between 30 MHz and

1 GHz is reduced, if the converter is built into a conductive

[dBµV/m]

50

07039a

A

[dBµV]

07035a

40

B

80

A

30

20

10

70

B

60

50

40

30

20

10

[MHz]

0

MHz

Fig. 41

Typ. radiated emissions (quasi peak) according to EN

55011/22, normalized to 10 m, measured on an open area

test site at V_{i nom}and I_{o nom}

Fig. 40

.

Conducted emissions (quasi-peak, typ.) at the input

according EN 55011/22, measured at V_{i nom}and I_{o nom}

.

BCD20023 Rev AB, 02-Nov-2010

Page 21 of 31

www.power-one.com

T Series Data Sheet

500 Watt AC-DC Converters

®

Environmental Conditions

Table 16: Mechanical and climatic stress

Test method

Standard

Test conditions

Status

Cab

Ea

Eb

Fc

Damp heat

steady state

IEC/EN 60068-2-78

Temperature:

Relative humidity:

Duration:

40^±2°C

%

56 days

Unit not

operating

93 ^+2/-3

Shock

(half-sinusoidal)

IEC/EN 60068-2-27

IEC/EN 60068-2-29

IEC/EN 60068-2-6

Acceleration amplitude:

Bump duration:

Number of bumps:

100 g_n= 981 m/s²

6 ms

18 (3 each direction)

Unit

operating

Bump

(half-sinusoidal)

Acceleration amplitude:

Bump duration:

Number of bumps:

40 g_n= 392 m/s²

6 ms

6000 (1000 in each direction)

Unit

operating

Vibration

(sinusoidal)

Acceleration amplitude:

0.21 mm (10 – 60 Hz)

3 g_n= 29.4 m/s²(60 – 2000 Hz) operating

10 – 2000 Hz

Unit

Frequency (1 Oct/min):

Test duration:

7.5 h (2.5 h each axis)

Fda

Kb

Random vibration

wide band

Reproducibility

high

IEC/EN 60068-2-35

DIN 40046 part 23

Acceleration spectral density: 0.05 g_{n rms}

Unit

operating

Frequency band:

Acceleration magnitude:

Test duration:

20 – 500 Hz

4.9 g_{n rms}

3 h (1 h each axis)

Salt mist, cyclic

(sodium chloride

NaCl solution)

IEC/EN 60068-2-52

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

3

Table 17 Temperature specifications

–7

Unit

Characteristic

Conditions

min

–25

typ

max

71

T_A

Ambient operational

temperature range

I_o= 0 – I_{o nom}

I_o> I_{o nom}

°C

65

T_C

Case temperature range I_o= 0 – I_{o nom}

95

at measurement point;

see Mechanical Data

I_o> I_{o nom}

90

T_S

Storage temperature

range (not operating)

–40

100

T_Cs

Case temperature,

when shut down

R_{th CA}Thermal resistance

convection

cooling

0.5

1

K/W

h

case to ambient

t_C

Thermal time constant

of case

Table 18: Reliability

Values at specified

case temperature

Model

Ground benign

40°C

Ground fixed

Ground mobile

50°C

Unit

40°C

70°C

MTBF¹

LT1701-7

198 000

56 000

26 000

20 000

h

Device hours ²

810 000

1

Calculated in accordance with MIL-HDBK-217E (calculation accord. to edition F would show even better results)

Statistical values, based on an average of 4300 working hours per year and in general field use, over 3 years

2

BCD20023 Rev AB, 02-Nov-2010

Page 22 of 31

www.power-one.com

T Series Data Sheet

500 Watt AC-DC Converters

®

Since the operating temperature is of major importance to

reliability, the following conditions should be observed:

Thermal Considerations

Even though the T Series converters have a very high

efficiency, the operating losses will heat the case. The two heat

sinks are designed to dissipate the power losses at maximum

output power over the specified temperature range without

forced cooling, if the convection cooling provides sufficient air

volume, without any obstruction for vertical air exchange below

and above the converter.

1. Do not cover heat sinks.

2. Do not obstruct air flow around the heat sinks.

3. Maximize free space around the converter !

4. If the power supplies and the loads are located in the

same enclosure, forced cooling is recommended. The T

units should be placed on the bottom of the enclosure.

5. Always check the maximum ambient and case

temperature after system integration.

Due to the slightly higher power losses in output power and

current limitation mode, the maximum admissible ambient and

case temperature is then lower than in output voltage

regulation mode.

P_loss[W]

08003a

Output power limitation

A built-in sensor disables the output in case of over-

temperature. The converter automatically recovers, when the

temperature falls below the limit.

40

Output current limitation

35

Derating is required for applications with higher operational

ambient temperature. The fig. below shows the derating of the

output power versus operational temperature above the

ambient temperature of 71 °C of an LT17xx unit. Two different

conditions are shown:

30

25

Output voltage regulation

20

15

10

5

a) Converter operating with convection cooling (solid line).

For example if the operational ambient temperature

reaches 80 °C, the output power should be limited to

approx. 290 W. In this case steady operation in output

power or current limitation mode is not possible.

0

P_o[W]

600

0

100

200

300

400

500

b) Converter operating with forced cooling (dotted line).

Under these conditions, the case temperature T_Cis

decisive. With sufficient cooling provided (air flow!), the

converter still delivers 550 Watts in voltage regulation

mode even at T_A= 85 °C, provided that T_C≤ 95 °C (T_C=

measuring point of case temperature; see Mechanical

Data). At T_C≤ 90°C, steady operation in output power or

current limitation mode is still possible. Nevertheless, it is

not recommended to operate the converter continuously

close to T_{C max}, since lifetime will be affected.

V_i= 110 VAC

V_i= 230 VAC

Fig. 43

Internal power losses versus nominal output power (T17xx)

P

_{o max}(convection

cooling)

P_o[W]

08002

550

P_{o max}

(forced cooling)

Output voltage

regulation mode

(I_o<10 A)

290

Output power/current

limitation mode

(I_o>10 A)

0

T_A[°C]

–25

50

60

70

80

90 95 100

Fig. 42

Output power versus ambient temperature of T17xx

BCD20023 Rev AB, 02-Nov-2010

Page 23 of 31

www.power-one.com

T Series Data Sheet

500 Watt AC-DC Converters

®

Mechanical Data

Dimensions in mm. The converters are designed to be inserted

into a 19” rack, 160 mm long, according to IEC 60297-3.

1.5

European

Projection

Sys OK (green)

OK (green)

V

o

Test sockets

Error (red)

26.8

141.5 (= 28 TE)

60

09036a

30

Fixtures for retention clips V

Measuring point 1

of case temperature T_c

Trim-potentiometer (Txx40)

Cell voltage selector switch Z (Txx40)

Input fuse (option)

0.73

5¹/2 TE

8 ¹/2 TE

0.3

Fig. 44

142.2 (= 28 TE)

Case T01, weight approx. 3 kg

BCD20023 Rev AB, 02-Nov-2010

Page 24 of 31

www.power-one.com

T Series Data Sheet

500 Watt AC-DC Converters

®

12.35

5

158

12

09037a

ø 4.5

M4

17.3

133.4

168.5

5

119

8

171.0...171.9

Measuring point of case temperature T_c

European

Projection

Fig. 45

Case T01 with option B1

(cooling plate)

10079

Safety and Installation Instructions

4

Connector Pin Allocation

6

10

14

18

22

26

30

8

The connector pin allocation table defines the electrical

potentials and the physical pin positions at the H15 connector.

Pin 8 and 10 (protective earth) are reliably connected to the

case of the converter. They are leading pins, ensuring that they

make contact with the female connector first.

12

16

20

24

28

32

Pin 16 (HC+) and pin 18 (HC–) are also leading pins to enable

hot-swapping of the converter.

Fig. 46

H15 male connector

BCD20023 Rev AB, 02-Nov-2010

Page 25 of 31

www.power-one.com

T Series Data Sheet

500 Watt AC-DC Converters

®

Caution: Prior to handling, the converter must be disconnected

from mains and from other sources (such as batteries).

Table 19: Connector pin allocation

Pin Electrical determination

Designation

Hazardous energy levels may be present at the output terminals

for 3 minutes, even after the input voltage has been disconnected

or switched off. This is indicated by the red error LED.

4

6

Phase line input

Neutral line input

L~

N~

To prevent an unwanted short-circuit across the output of a

disconnected converter, pins 16 and 18 are leading pins. In case

of a short-circuit across the output of a T unit, all LEDs will be off,

even though the mains may be present.

8 ¹Protective earth PE¹

10 ¹Protective earth PE¹

12 Output voltage positive

14 Output voltage positive

16 ¹Hot plug-in contact positive

18 ¹Hot plug-in contact negative

20 Output voltage negative

22 Output voltage negative

24 System Good signal input

26 System Good signal output

28 Inhibit or remote control input

30 Power Down signal

Vo+

Due to high output current value, the T Series converters

provide for each the positive and the negative output path two

internally parallel connected contacts (pins 12/14 and pins 20/

22). It is recommended to connect the load to both female

connector pins of each path, in order to keep the voltage drop

and power loss across the connector pins as small as possible.

HC+

HC–

Vo–

If a T Series converter is used for battery charging, check

whether the position of the cell voltage selector switch

corresponds to the required battery cell voltage.

Sys In

Sys Out

i/Vcr

D

Caution: Lead-acid batteries can generate H₂and O₂gas, which

can form explosive mixtures. Sufficient ventilation must be

provided in battery cabinets and installation rooms.

32 Power Down signal threshold of V_o

D set

Further information about designing battery systems is contained

in VDE 0510, part 2.

1

Leading pin (pre-connecting)

If a T Series converters are connected in parallel, it is

recommended to connect the two hot plug-in pins of each

female connector, HC+ (pin 16) and HC– (pin 18), to their

respective output pins Vo+ and Vo– .

Installation Instruction

All T Series converters are components, intended exclusively

for inclusion within other equipment by an industrial assembly

operation or by professional installers. Installation must strictly

follow the national safety regulations in compliance with the

enclosure, mounting, creepage, clearance, casualty,

markings, and segregation requirements of the end-use

application.

Make sure that there is sufficient air flow available for

convection cooling. This should be verified by measuring the

case temperature, when the converter is installed and

operated in the end-use application. The maximum specified

case temperature T_{C max}must not be exceeded. See also

Thermal Considerations.

Connection to the system shall be made via the female

connector H15 (see Accessories). Other installation methods

may not meet the safety requirements.

If the end-product is to be UL certified, the temperature test

may be repeated as part of the end-product investigation.

Ensure that a converter failure (e.g., by an internal short-

circuit) does not result in a hazardous condition. See also

Safety of Operator-Accessible Output.

The converters are provided with pins 8 and 10 ( ), which are

reliably connected to the case. For safety reasons it is

essential to connect at least one of these pins reliably to the

protective earth (PE) of the supply system.

Protection Degree and Cleaning Agents

Input L~ (pin 4) is internally fused. This fuse is designed to

protect the converter in case of overcurrent and may not be

able to satisfy all customer requirements. External fuses in the

wiring to one or both inputs (pin 4 and/or pin 6) may therefore

be necessary to ensure compliance with local requirements. A

second fuse in the wiring to the neutral line N~ is needed, if:

If the female connector is fitted, the protection degree is IP30.

Since the converters are not hermetically sealed, any

penetration of cleaning fluids must be prevented.

Audible Noise

Under certain operating conditions, a T Series converter may

generate a slight audible noise due to magneto-striction in the

transformer. This noise does neither affect the function of the

converter, nor is it detrimental to its performance over time.

• Local requirements demand an individual fuse in each

source line

• Neutral to earth impedance is high or undefined

• Phase and neutral of the mains are not defined or cannot

be assigned to the corresponding terminals (L~ to phase

and N~ to neutral).

Standards and Approvals

All T Series converters correspond to class I equipment. They

comply with IEC/EN 60950-1, are CE-marked and safety-

approved by CSA to UL/CSA 60950-1. They have been

evaluated according for:

Important: Do not open the converter, or warranty will be

invalidated.

BCD20023 Rev AB, 02-Nov-2010

Page 26 of 31

www.power-one.com

T Series Data Sheet

500 Watt AC-DC Converters

®

• Building in

The converters are subject to manufacturing surveillance in

accordance with the above mentioned UL standards and with

ISO9001:2000.

• Basic insulation between input and case, based on

250 VAC

• Double or reinforced insulation between input and output,

based on 250 VAC

For details see the Declaration of Conformity.

• Operational insulation between output and case

• The use in a pollution degree 2 environment

• Connecting the input to a primary circuit with a maximum

transient rating of 2500 V (overvoltage class III based on a

110 VAC primary circuit, overvoltage class II based on a

230 VAC primary circuit).

Isolation

The electric strength test is performed in the factory as routine

test in accordance with EN 50116 and IEC/EN 60950 and

should not be repeated in the field. Power-One will not honor

any warranty claims resulting from electric strength field tests.

Table 20: Isolation

Characteristic

Input to case

and output

Output to

case

Temp. Sensor T

output to case

Unit

Electric

strength

test

Factory test ≥1 s

2.8 ¹

2.0

1.4

1.0

1.4

1.0

kVDC

kVAC

AC test voltage equivalent

to factory test

Insulation resistance at 500 VDC

>300

>100

MΩ

1

According to EN 50116 and IEC/EN 60950-1, transformers and subassemblies connecting input to output are pretested with 5.6 kVDC or

4.0 kVAC.

10070a

L

N

Vo+

Vo–

L

N

Leakage Currents

S1

Leakage currents flow due to internal leakage capacitance

and RFI suppression Y-capacitors. The current values are

proportional to the input voltage and frequency. They are

specified at maximum operating input voltage, where phase,

neutral, and protective earth are correctly connected, as

required for class I equipment.

Converter

MI for

earth

leakage

current

S2

S3

Under test conditions, the leakage current flows through a

measuring instrument (MI) as described in the fig. below, which

takes into account impedance and sensitivity of a person

touching unearthed accessible parts. The current value is

calculated by dividing the measured voltage by 500 Ω. If inputs

and/or outputs of converters are connected in parallel, their

individual leakage currents are added.

MI for

output

leakage

current

Fig. 48

Test set-up for leakage current in single phase configuration.

S1 is used to simulate the interchanging of phase and

neutral. S2, S3 select either the earth or output leakage

current test, S4 selects either the positive or negative output.

10061

10071a

1500 Ω

L1

L2

L

Converter

Vo+

Vo–

L2

500 Ω

N

L3

N

220 nF

MI for

earth

leakage

current

10 kΩ

S2

S3

22 nF

V

MI for

output

leakage

current

Fig. 49

Fig. 47

Test set-up for leakage current in 208 V phase to phase

configuration. S2, S3 select either the earth or output leakage

current test, S4 selects either the positive or negative output.

Measuring instrument (MI) for earth leakage current test

according to IEC/EN 60950, Annex D.

BCD20023 Rev AB, 02-Nov-2010

Page 27 of 31

www.power-one.com

T Series Data Sheet

500 Watt AC-DC Converters

®

Table 21: Leakage currents

Characteristic

LT/UT

3.5

Unit

Earth leakage

current

Permissible according to IEC/EN 60950

mA

Specified value at 255 V, 50 Hz (LT)

Specified value at 127 V, 60 Hz (LT or UT)

Permissible according to IEC/EN 60950

Specified value at 255 V, 50 Hz (LT)

Specified value at 127 V, 60 Hz (LT or UT)

1.8 ¹

1.1 ¹

0.25

<0.1

Output leakage

current

1

In phase to phase configuration, the leakage current is lower.

Safety of Operator-Accessible Output Circuits

10021a

Output

+

SELV

–

Fuse

If the output circuit of a converter is operator-accessible, it

shall be an SELV according to the safety standard IEC/EN

60950.

AC-DC

converter

~

Mains

Earth

The following table shows a possible installation configuration,

compliance with which causes the output circuit to be an SELV

circuit up to a configured output voltage (sum of nominal

voltages if in series or +/– configuration) of 56.5 V.

connection

However, it is the sole responsibility of the installer to assure

the compliance with the relevant and applicable safety

regulations.

Fig. 50

Schematic safety concept

Table 22: Safety concept leading to an SELV circuit

Conditions

AC-DC converter

Installation

Result

Supply voltage

Grade of isolation between input and

output, provided by the AC-DC

converter

Measures to achieve the resulting

safety status of the output circuit

Safety status of the AC-DC

converter ouput circuit

Mains ≤250 VAC

Double or reinforced

Installation according to the applicable

standards

SELV circuit

F Externally Accessible Fuse

Description of Options

The standard T converters have a non-accessible fuse, 5 × 20

mm. Some applications require an externally accessible fuse.

Option F provides a fuse mounted on the rear side; see

Mechanical Data.

D Undervoltage Monitor

This option is designed for systems using backplanes or is

intended for use in applications, where a fuse or a decoupling

diode is fitted into the positive supply line to the system bus.

The status of the system bus/battery voltage can be monitored

rather than the output status of a single T unit. Input D set (pin

32) is not internally connected to Vo+ (R_intis missing; see fig.

20).

B1 Cooling Plate

If a cooling surface is available, the converters can be

provided with a mounting plate (option B1) instead of the

standard heat sink on the right-hand side; see Mechanical

Data.

To maintain the adjustment capabilities and resistor values for

setting the different threshold values, a 43.2 kΩ (21.5 kΩ)

resistor should be fitted into the sense line to the bus. If D set

(pin 32) is left open, output D (pin 30) is permanently signaling

low bus voltage.

Since approximately 50% of the losses have to be dissipated

through the remaining heat sink on the left-hand side, sufficient

free air flow must still be provided.

For details see also Auxiliary functions, Power Down.

BCD20023 Rev AB, 02-Nov-2010

Page 28 of 31

www.power-one.com

T Series Data Sheet

500 Watt AC-DC Converters

®

Accessories

T Series Front Panels 28 TE

A variety of electrical and mechanical accessories are

available, including:

This front panel fits to all T Series converters with case size T01.

Table 23: T case front panel selection

– Mating H15 connectors with screw, solder, faston, or

pressfit terminals

– Connector retention clips V [HZZ01209]

– Connector retention brackets CRB [HZZ01216]

– Cable hood [HZZ00141] with retention brackets

[HZZ01218]

– Code key system for connector coding

– Temperature sensor T for battery charging

– Front panels for 19" DIN-rack mounting, Schroff system

– 19" DIN-racks for system integration

– Backplanes for system integration matching to 19” DIN-

rails.

Width

Case

size

T01

Series Type

item no.

TE

28

mm

141.9

T

G28-T01 met [HZZ00890]

G28-T01 plas [HZZ00837]

T01

Delivery content:

Front panel with two grey plastic handles, three countersunk

screws, set of four plastic or metal retainers with captive

screws, and assembly instructions.

G28-T01 met [HZZ00890] with metal screw retainers

G28-T01 plas [HZZ 00837] with plastic screw retainers.

For additional information go to www.power-one.com .

Blind plates: To close a non fully equipped 19" DIN-rack (only

one or two converters fitted), 28 TE wide blind plates without

holes are available:

G28-T01-blank met [HZZ 00847] with metal screw retainers

G28-T01-blank plas [HZZ 00848] with plastic screw retainers.}

European

Projection

Fig. 52

Connector retention

clip V

Fig. 51

H15 female connector (with

code system)

26.2 ^±0.181.8 ^±0.1

2.5 ^±0.1

56.7

29

Fig. 53

19" DIN-rack

141.9

Fig. 55

Front panels for T Series (case T01)

Fig. 54

Backplane for system intergration

BCD20023 Rev AB, 02-Nov-2010

Page 29 of 31

www.power-one.com

T Series Data Sheet

500 Watt AC-DC Converters

®

For T Series converters without Z selector switch, a sensor

according to both criteria should be selected. In our example it

should be S24-2.23-35-02.

Temperature Sensors T

The T Series battery chargers exhibit a cell voltage selector

switch Z to set the required floating charge voltage at 20 °C

directly at the converter. If this Z switch is used, the 2.23 V/cell

sensor types should be selected in any case as a basis, and

the selection criteria are only the temperature coefficient and

the nominal voltage of the battery. For example, if a 24 V

battery is used, which has a cell voltage of 2.23 V and a cell

temperature coefficient of –3.5 mV/K, the sensor type is S24-

2.23-35-02. The setting on the Z switch should be 2.23.

The active temperature sensor T is of robust construction,

mounted into a sealed aluminium tube of 12 mm outer

diameter and 50 mm length. The sensors are waterproof

(IP 66) and high-voltage tested with 1.4 kVDC. Connection

should be done via the colored 3 wire cable to the output of the

converter (Vo+ and Vo–) and the remote control input i/Vcr (pin

28).

Caution: Wrong connection may damage the sensor and the

converter.

–

+

Sensor Sensor

wires

cable

Note: Battery specific sensors with cell voltages from 2.23 V up to

2.32 V and temperature coefficients from –2 up to –4.5 mV/K per

cell or different cable lengths are available upon request.

white

28

i/Vcr

Vo+

brown

Note: For installation of batteries, see VDE 510 as well as the

recommendations of the battery manufacturers.

Fuse

12

+

–

Vo–

Battery

green

22

Sensor T

Fig. 56

Wiring diagram sensor

Table 24: Type survey temperature sensors T

Nominal battery

voltage [V]

Sensor type

Cell voltage

[V]

Temp. coefficient per cell

[mV/K]

Cable length

[m]

24

36

48

S24-2.23-30-02

S24-2.23-35-02

S24-2.23-45-02

S36-2.23-30-02

S36-2.23-35-02

S36-2.27-35-02

S48-2.23-30-02

S48-2.23-35-02

S48-2.23-40-02

S48-2.23-45-02

S48-2.27-30-02

S48-2.27-35-02

S48-2.27-45-02

2.23

2.27

2.23

2.27

–3.0

–3.5

–4.5

–3.0

–3.5

–3.0

–3.5

–4.0

–4.5

–3.0

–3.5

–4.5

2

Table 25: Sensor data

Characteristics

Condition

min

–10

3.9

typ

max

60

Unit

T_sensor

V_cr

Sensor temperature range

Control voltage range

V_cr= 5.5 – 11.5 V

°C

V

Absolute ratings

T_sensor= 20 °C

15

V_{cr td}

Control voltage tolerance

±0.1

T_sensor= 0 – 53 °C

±0.2

BCD20023 Rev AB, 02-Nov-2010

Page 30 of 31

www.power-one.com

T Series Data Sheet

500 Watt AC-DC Converters

®

If sensors are connected in parallel (redundant configuration),

they should be decoupled by 200 kΩ resistors; see fig. below.

An individual sensor for each parallel connected T converter is

not recommended, because current sharing is affected by the

sensor tolerance.

06078a

Vo+

Sensor

Converter

i/Vcr

200 kΩ

Fig. 59

Temperature sensor T with mounting fixture.

Vo–

Fig. 57

Sensors connected in parallel.

Sensors in parallel provide redundant voltage adjustment in

case of one of the sensors goes into an open-circuit or short-

circuit condition (add. external components required)

European

Projection

09044b

fixture YVM009

15

25 ^{± 0.2}

12

l

60

adhesive tape

length l: 2 m (standard)

Fig. 58

Mechanical dimensions (in mm)

NUCLEARAND MEDICALAPPLICATIONS - Power-One products are not designed, intended for use in, or authorized for use as critical components

in life support systems, equipment used in hazardous environments, or nuclear control systems without the express written consent of the

respective divisional president of Power-One, Inc.

TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change depending on the

date manufactured. Specifications are subject to change without notice.

BCD20023 Rev AB, 02-Nov-2010

Page 31 of 31

www.power-one.com


型号：	LT1201-7DB1
厂家：	BEL FUSE INC.
描述：	AC-DC Regulated Power Supply Module, 1 Output, 400W, CASE T01, MODULE
文件：	总31页 (文件大小：779K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

LT1201-7DB1 [BEL]

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