PT3341A [TI]

1500 VDC Isolation;


型号：	PT3341A
厂家：	TEXAS INSTRUMENTS
描述：	1500 VDC Isolation
文件：	总5页 (文件大小：1273K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

For assistance or to order, call (800) 531-5782

Revised 5/19/99

P T 3 3 4 0 S e r i e s

Application Notes

Mechanical Outline

Product Selector Guide

30 WATT ISOLATED

DC/DC CONVERTER

The PT3340 is a new series of high-

input voltage, 30 Watt, isolated DC to

DC converters housed in a unique

vertical or horizontal 19-pin SIP pack-

age. The 18 to 60V input range allows

easy integration into many distributed

power applications which utilize 24V bus

architectures.

110% of nominal with the addition of an

external resistor. Other easy to use

features include an inhibit function and a

differential remote sense which auto-

matically compensates for any voltage

drop from the converter to the load. The

PT3340 includes built in current limit,

short circuit protection and over-

temperature shutdown.

The PT3340 series is available with

output voltages from 3.3V to 15V. The

output voltage is adjustable from 90 to

The PT3340 requires a 330µF output

capacitor for proper operation.

Patent pending*

Pin-Out Information

Features

Standard Application

Pin Function

• 30W Output Power

• Input Voltage Range:

18V to 60V

V_OAdjust

Do Not Use

Inhibit

Do Not Use

-V_in

10 -V_o

11 -V_o

12 -V_o

13 -Remote Sense

14 +V_o

+REMOTE SENSE

+V_IN

7-9

+V_O

14-17

• 1500 VDC Isolation

• V_oInhibit

• V_oAdjust

• Differential Remote Sense

• Current Limit

• Short-Circuit Protection

• Over-Temperature Shutdown

• Undervoltage Lockout

• Flexibile SIP Package

• UL 1950, CSA 22.2 950

approval pending

PT3340

-V_in

4-6

13 10-12

C_OUT

LOAD

C_IN

Inhibit

-V_IN

15 +V_o

-V_O

-REMOTE SENSE

Q₁

+V_in

16 +V_o

17 +V_o

Q₁

= Optional 100µF/100V electrolytic

= Required 330µF electrolytic

= NFET

out

+V_in

18 V_oAdjust

19 +Remote Sense

Preliminary Specifications

PT3340 SERIES

Characteristics

(T_a= 25°C unless noted)

Symbols

Conditions

Over V_inrange

Min

Typ

Max

Units

Output Current

I_o

V_o= 3.3V

V_o= 5V

V_o= 12V

0.25

0.1

—

8.0

6.0

2.5

• Meets EN60950

On/Off Standby Current

Short Circuit Current

Input Voltage Range

I_{in standby}

I_sc

V_in= 24V, Pin 1 = -V_in

V_in= 24V

—

I_omaxx2

24.0

—

Ordering Information

PT3341¨ = 3.3V/8A

PT3342¨ = 5.0V/6A

PT3343¨ = 12.0V/2.5A

PT3344¨ = 15.0V/2A

V_in

Over I_oRange

18.0

60.0

Output Voltage Tolerance ∆V_o

Over V_inRange

T_A= -40°C to +85°C

—

1.0

—

%V^o

Line Regulation

Load Regulation

V_oRipple/Noise

Reg_line

Over V_inrange @ max I_o

10% to 100% of I_omax

—

0.5

—

%V_o

Reg_load

V_n

V_in=24V, I_o=I_omax, V_o>5V

V_in=24V, I_o=I_omax, V_o<5V

—

1.0

—

%V_o

mV_pp

Transient Response

Efficiency

t_tr

50% load change, 1A/µSec

V_oover/undershoot, V_o>5V

—

100

3.0

—

µSec

%V_o

PT Series Suffix

(PT1234X)

V_in=24V, I_o=6A, V_o=3.3V

V_in=24V, I_o=6A, V_o=5V

V_in=24V, I_o=2.5A, V_o=12V

—

Case/Pin

Configuration

Vertical Through-Hole

Switching Frequency

ƒ_o

Over V_inand I_o

V_o<10V

V_o>10V

600

400

750

500

900

600

kHz

Horizontal Through-Hole

Horizontal Surface Mount

Recommended Operating T_a

Temperature Range

V_in= 48V @ max I_o

Airflow = 200 LFM

-40*

-40

—

+85

+125

—

°C

G’s

(For dimensions and PC board layout,

see Package Styles 840 and 850.)

Storage Temperature

Mechanical Shock

T_s

—

Per Mil-Std-883D, method 2002.3,

1mS, half-sine, mounted to a fixture

500

Mechanical Vibration

—

Per Mil-Std-883D, method 2007.2,

20-2000Hz, soldered in a PC board

—

G’s

* Note: This product is the

subject of one or more patents.

Other patents pending.

Weight

—

grams

Input/Output Isolation

Capacitance

—

1500

—

1200

—

VDC

Resistance

MΩ

Flammability

Inhibit (pin 2)

—

Materials meet UL 94V-0

On**

Off

2.5

—

0.8

VDC

Referenced to -Vⁱⁿ

* At temperatures below 0°C, the PT3340 series requires output capacitors with temperature stable dielectrics

such as tantalum or Oscon.

** If pin 2 is left open, the PT3340 will operate when input power is applied.

Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com

For assistance or to order, call (800) 531-5782

P T 3 3 4 0 S e r i e s

C H A R A C T E R I S T I C

D A T A

PT3341, 3.3 VDC (See Note 1)

PT3342, 5.0 VDC (See Note 1)

PT3343, 12.0 VDC (See Note 1)

Efficiency vs Output Current

100

Vin

18.0V

24.0V

36.0V

48.0V

60.0V

Vin

18.0V

24.0V

36.0V

48.0V

60.0V

Vin

18.0V

24.0V

36.0V

48.0V

60.0V

0.0

0.5

1.0

1.5

2.0

2.5

Iout (A)

Ripple vs Output Current

120

100

Vin

18.0V

24.0V

36.0V

48.0V

60.0V

18.0V

24.0V

36.0V

48.0V

60.0V

18.0V

24.0V

36.0V

48.0V

60.0V

0.0

0.5

1.0

1.5

2.0

2.5

Iout (A)

Power Dissipation vs Output Current

Vin

18.0V

24.0V

36.0V

48.0V

60.0V

18.0V

24.0V

36.0V

48.0V

60.0V

18.0V

24.0V

36.0V

48.0V

60.0V

0.0

0.5

1.0

1.5

2.0

2.5

Iout (A)

Safe Operating Area (@Vin=24V)

Airflow

Nat conv

60LFM

120LF M

200LF M

120LFM

200LFM

120LF M

200LF M

0.5

1.5

2.5

Iout (A)

Note 1: All data listed in the above graphs has been developed from actual products tested at 25°C. This data is considered typical data for the DC-DC Converter.

Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com

For assistance or to order, call (800) 531-5782

PT3320/3340 Series

A p p l i c a t i o n

N o t e s

More Application Notes

Adjusting the Output Voltage of the PT3320 /

PT3340 Series of Isolated DC-DC Converters

3ꢁ If the remote sense pins are not being used, the resistors (R1)

and R2 can be connected to +V_outor -V_outrespectivelyꢁ

4ꢁ The adjusted output voltage V_aeffectively sets the voltage

across pins 13 and 19 ( Remote Sense)ꢁ When using the

remote sense pins, V_out(measured directly across pins 10–12,

and 14–17) can be significantly higher than V_a, and may

exceed V_o(max)ꢁ If V_ais adjusted upward, the alternative is

to increase the minimum input voltage by the same percent-

age as V_outexceeds V_o(max)ꢁ

The factory pre-set output voltage of Power Trends’ PT3320

and PT3340 series DC-DC converters may be adjusted within a

nominal 10ꢀ rangeꢁ This is accomplished with the addition of

a single external resistorꢁ For the input voltage range specified in

the data sheet, Table 1 gives the allowable adjustment range for

each model as V_o(min) and V_o(max)ꢁ

Adjust Up:

An increase in the output voltage is obtained by

adding a resistor, R2 between pin 18 (V_oadjust), and pin 13

(-Remote Sense)ꢁ See note 4ꢁ

The values of (R1) [adjust down], and R2 [adjust up], can also be

calculated using the following formulasꢁ

Adjust Down: Add a resistor (R1), between pin 18 (V_oadjust)

and pin 19 (+Remote Sense)ꢁ

R_o(V_o– V_r)(V_a– V_r)

(R1)

– R_skΩ

kΩ

V_r(V_o– V_a)

Refer to Figure 1 and Table 2 for both the placement and value

of the required resistor, (R1) or R2ꢁ

R_o(V_o– V_r)

(V_a– V_o)

– R_s

Notes:

Where

V_o= Original output voltage

V_a= Adjusted output voltage

V_r= Reference voltage (Table 1)

R_o= Multiplier resistance (Table 1)

R_s= Series resistance (Table 1)

1ꢁ Use only a single 1ꢀ resistor in either the (R1) or R2 loca-

tionꢁ Place the resistor as close to the ISR as possibleꢁ

2ꢁ Never connect capacitors to V_oadjustꢁ Any capacitance

added to the V_oadjust control pin will affect the stability of

the ISRꢁ

Table 1

DC-DC CONVERTER ADJUSTMENT RANGE AND FORMULA PARAMETERS

Series Pt #

24V Bus

48V Bus

PT3341

PT3321

PT3342

PT3343

PT3323

PT3344

PT3324

PT3325

PT3326

PT3322

V (nom)

2ꢁ0V

1ꢁ8V

2ꢁ2

2ꢁ5

3ꢁ3

5ꢁ0

4ꢁ5

5ꢁ5

12ꢁ0

10ꢁ8

13ꢁ2

15ꢁ0

13ꢁ5

16ꢁ5

Vo(min)

Vo(max)

2ꢁ25

2ꢁ75

2ꢁ95

3ꢁ65

1ꢁ225

80ꢁ6

1ꢁ225

33ꢁ2

1ꢁ225

33ꢁ2

1ꢁ225

18ꢁ2

2ꢁ5

14ꢁ3

2ꢁ5

11ꢁ0

(kΩ)

150ꢁ0

121ꢁ0

150ꢁ0

121ꢁ0

90ꢁ9

80ꢁ6

Figure 1

Inhibit

Sns(+)

7, 8,

14 - 17

+Vin

+Vout

+V _in

PT3320/3340

-Vin

4, 5,

-Vout

Sns(-)

Vo(adj)

- 12

(R1)

Adj Down

Cin

100

100V

(Optional)

Cout

330

Adj Up

-V_in

-V

Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com

For assistance or to order, call (800) 531-5782

PT3320/3340 Series

A p p l i c a t i o n

N o t e s

Table 2

PT3320 / PT3340 ADJUSTMENT RESISTOR VALUES

Series Pt #

24V Bus

48V Bus

Current

V_o(nom)

V_a(req’d)

PT3341

PT3321

8Adc

PT3342

PT3322

6adc

5.0Vdc

V_a(req’d)

PT3343

PT3323

2.5Adc

PT3344

PT3324

2.0Adc

PT3325

8Adc

2.0Vdc

PT3326

8Adc

2.5Vdc

3.3Vdc

12.0Vdc

15.0Vdc

V_a(req’d

1ꢁ8

0ꢁ0kΩ

(62ꢁ5)kΩ

(194ꢁ0)kΩ

(589ꢁ0)kΩ

4ꢁ5

(246ꢁ0)kΩ

(293ꢁ0)kΩ

(352ꢁ0)kΩ

(428ꢁ0)kΩ

(529ꢁ0)kΩ

(670ꢁ0)kΩ

(882ꢁ0)kΩ

(1230ꢁ0)kΩ

(1940ꢁ0)kΩ

10ꢁ8

11ꢁ0

11ꢁ2

11ꢁ4

11ꢁ6

11ꢁ8

12ꢁ0

12ꢁ2

12ꢁ4

12ꢁ6

12ꢁ8

13ꢁ0

13ꢁ2

(285ꢁ0)kΩ

(371ꢁ0)kΩ

(500ꢁ0)kΩ

(715ꢁ0)kΩ

(1150ꢁ0)kΩ

1ꢁ85

1ꢁ9

4ꢁ55

4ꢁ6

1ꢁ95

2ꢁ0

4ꢁ65

4ꢁ7

2ꢁ05

2ꢁ1

1100ꢁ0kΩ

475ꢁ0kΩ

266ꢁ0kΩ

162ꢁ0kΩ

4ꢁ75

4ꢁ8

2ꢁ15

2ꢁ2

4ꢁ85

4ꢁ9

588ꢁ0kΩ

249ꢁ0kΩ

136ꢁ0kΩ

78ꢁ9kΩ

45ꢁ0kΩ

22ꢁ3kΩ

2ꢁ25

2ꢁ3

(20ꢁ7)kΩ

(64ꢁ7ꢁ0)kΩ

(138ꢁ0)kΩ

(285ꢁ0)kΩ

(726ꢁ0)kΩ

4ꢁ95

5ꢁ0

2ꢁ35

2ꢁ4

5ꢁ05

5ꢁ1

566ꢁ0kΩ

337ꢁ0kΩ

223ꢁ0kΩ

154ꢁ0kΩ

108ꢁ0kΩ

75ꢁ3kΩ

50ꢁ8kΩ

31ꢁ7kΩ

16ꢁ4kΩ

2ꢁ45

2ꢁ5

5ꢁ15

5ꢁ2

13ꢁ5

13ꢁ6

13ꢁ8

14ꢁ0

14ꢁ2

14ꢁ4

14ꢁ6

14ꢁ8

15ꢁ0

15ꢁ2

15ꢁ4

15ꢁ6

15ꢁ8

16ꢁ0

16ꢁ5

(323ꢁ0)kΩ

(355ꢁ0)kΩ

(437ꢁ0)kΩ

(522ꢁ0)kΩ

(724ꢁ0)kΩ

(1010ꢁ0)kΩ

(1580ꢁ0)kΩ

2ꢁ55

2ꢁ6

726ꢁ0kΩ

302ꢁ0kΩ

161ꢁ0kΩ

90ꢁ6kΩ

5ꢁ25

5ꢁ3

2ꢁ65

2ꢁ7

5ꢁ35

5ꢁ4

2ꢁ75

2ꢁ95

3ꢁ0

48ꢁ3kΩ

5ꢁ45

5ꢁ5

(127ꢁ0)kΩ

(183ꢁ0)kΩ

(261ꢁ0)kΩ

(377ꢁ0)kΩ

(572ꢁ0)kΩ

(961ꢁ0)kΩ

(2130ꢁ0)kΩ

3ꢁ05

3ꢁ1

607ꢁ0kΩ

263ꢁ0kΩ

149ꢁ0kΩ

91ꢁ3kΩ

56ꢁ9kΩ

11ꢁ1kΩ

3ꢁ15

3ꢁ2

3ꢁ25

3ꢁ3

3ꢁ35

3ꢁ4

1230ꢁ0kΩ

539ꢁ0kΩ

309ꢁ0kΩ

194ꢁ0kΩ

126ꢁ0kΩ

79ꢁ6kΩ

3ꢁ45

3ꢁ5

3ꢁ55

3ꢁ6

3ꢁ65

46ꢁ8kΩ

R1 = (Red)

R2 = Black

Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com

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PT3341A [TI]

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