PT3302A [TI]

30 WATT POSITIVE STEP-DOWN INTEGRATED SWITCHING REGULATOR; 30 WATT正降压集成开关稳压器


型号：	PT3302A
厂家：	TEXAS INSTRUMENTS
描述：	30 WATT POSITIVE STEP-DOWN INTEGRATED SWITCHING REGULATOR 30 WATT正降压集成开关稳压器稳压器开关式稳压器或控制器电源电路开关式控制器
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中文：	中文翻译
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Application Notes

Mechanical Outline

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

Product Selector Guide

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

30 WATT POSITIVE STEP-DOWN

INTEGRATED SWITCHING REGULATOR

Revised 5/15/98

The PT3300 is a new series of high-

nominal with the addition of an external

input voltage, 30 Watt, non-isolated

Integrated Switching Regulators (ISRs)

housed in a 19-pin SIP package. The 20

to 60 V input range allows easy integra-

tion into many distributed power

applications which utilize 24, 28, or 48V

bus architechures.

The PT3300 series is available with

3.3, 5, 12, or 15V outputs. The output

voltage is adjustable from 90 to 110% of

resistor. Other easy to use features include

an inhibit function and remote sense

which automatically compensates for any

voltage drop from the ISR to the load. As

with other Power Trends’ products, the

PT3300 includes built in current limit,

short circuit protection and over-tempera-

ture shutdown.

The PT3300 requires a 330µF output

capacitor for proper operation.

Pin-Out Information Ordering Information

Features

Pin Function

PT3301o = +3.3 Volts

• 30W Output Power

• Input Voltage Range:

Do Not Use

Inhibit

V_oAdjust

V_inGND

PT3302o = +5.0 Volts

PT3303o = +12.0 Volts

PT3304o = +15.0 Volts

Standard Application

20V to 60V

• High Efficiency

• V_oInhibit

• V_oAdjust

• Remote Sense

V_OAdjust

Inhibit

REMOTE SENSE

V_IN

V_O

_inGND

7-9

14-17

PT3300

V_in

PT Series Suffix

(PT1234X)

4-6

10-13

C_IN

C_OUT

LOAD

Case/Pin

• Current Limit

Configuration

V_INGND

V_OGND

• Short-Circuit Protection

• Over-Temperature Shutdown

• 19-pin SIP Package

V_oGND

V_o

Vertical Through-Hole

= Optional 100µF/100V electrolytic

= Required 330µF electrolytic

Horizontal Through-Hole

Horizontal Surface Mount

out

Note: Pins 4,5,6 and pins 10,11,12,13 are

connected internally.

(For dimensions and PC

board layout, see Package

Styles 820 and 830.)

Do Not Use

Remote Sense

Specifications

PT3300 SERIES

Characteristics

(T_a= 25°C unless noted)

Symbols

Conditions

Min

Typ

Max

Units

Output Current

I_o

Over V_inrange

V_o= +3.3V

V_o= +5.0V

V_o= +12.0V

V_o= +15.0V

0.50*

0.25*

0.20*

—

8.0

6.0

2.5

2.0

Short Circuit Current

Input Voltage Range

I_sc

V_in= +25V

—

2×I_max

—

V_in

∆V_o

0.5 ≤ I_o≤ I_max

—

Output Voltage Tolerance

Over V_inrange, I_o= I_max

—

±1

±3

%Vo

0°C ≤ T_a≤ +60°C

Line Regulation

Load Regulation

V_oAdjust Range

V_oRipple/Noise

Reg_line

Reg_load

V_{o adj}

V_n

Over V_inrange

—

±0.5

—

±1

110

%V_o

0.5 ≤ I_o≤ I_max

Over V_inand I_oranges

V_in= +24V, I_o= I_max

Transient Response

with C_out= 330µF

t_tr

V_os

25% load change

V_oover/undershoot

—

100

250

µSec

%V_o

Efficiency

V_in= +24V, I_o= 0.5×I_max

V_o= +3.3V

Vo = +5.0V

V^o= +12.0V

—

Switching Frequency

ƒ_o

Over V_inand I_oranges

600

750

900

kHz

Absolute Maximum

T_a

-20

—

+85

°C

Operating Temperature Range

Recommended Operating

Temperature Range

T_a

Free air convection

-20

—

+65**

°C

Over V_inand I_oranges

Storage Temperature

Mechanical Shock

T_s

—

-40

—

+125

—

°C

Per Mil-STD-883D, Method 2002.3

500

G’s

Mechanical Vibration

Per Mil-STD-883D, Method 2007.2,

20-2000 Hz, soldered in a PC board

—

G’s

Weight

—

grams

*ISR will operate down to no load with reduced specifications. ** See Thermal Derating Curve

Note: The PT3300 Series requires a 330µF electrolytic or tantalum output capacitor for proper operation in all applications.

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 0 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

PT3301, 3.3 VDC

(See Note 1)

PT3302, 5.0 VDC

(See Note 1)

Efficiency vs Output Current

100

Vin

20.0V

24.0V

30.0V

36.0V

48.0V

60.0V

20.0V

24.0V

30.0V

36.0V

48.0V

60.0V

Output Current (Amps)

Ripple vs Output Current

100

Vin

60.0V

48.0V

36.0V

30.0V

24.0V

20.0V

60.0V

48.0V

36.0V

30.0V

24.0V

20.0V

Output Current (Amps)

Thermal Derating (T_a)

(See Note 2)

5.5

85°C

4.5

3.5

2.5

1.5

0.5

Vin-(Volts)

Power Dissipation vs Output Current

Vin

60.0V

48.0V

36.0V

30.0V

24.0V

20.0V

60.0V

48.0V

36.0V

30.0V

24.0V

20.0V

Output Current (Amps)

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

Note 2: Thermal derating graphs are developed in free air convection cooling of 40-60 LFM. (See Thermal Application Notes.)

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

PT3300 Series

A p p l i c a t i o n

N o t e s

More Applcation Notes

Adjusting the Output Voltage of the

PT3300 Wide Input Range Switching Regulator

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

calculated using the following formulae.

R_o(V_o– 1)(V_a– 1)

The output voltage of the Power Trends PT3300 Series ISRs

may be adjusted over a ±10% range from the factory trimmed

pre-set voltage. This is accomplished with the addition of a

single external resistor. Table 1 accordingly gives the allowable

adjustment range for each model in the series as V_a(min) and

V_a(max).

(R1)

- 0.48

kΩ

pt₍5_V04_–0_V

R_o(V_o– 1)

Va - V_o

- 0.48

Where:

V_o= Original output voltage

V_a= Adjustd output voltage

R_o= The value in Table 1

Adjust Up:

An increase in the output voltage is obtained by

adding a resistor R2, between pin 3 (V_oadjust) and pins 10-13

(V_oGND)

Adjust Down: Add a resistor (R1), between pin 3 (V_oadjust)

and pins 14-17 (V_out).

Table 2

PT3300 ADJUSTMENT RESISTOR VALUES

Series Pt #

Current

V_o(nom)

PT3301

8Adc

3.3Vdc

PT3302

6Adc

5.0Vdc

PT3303

2.5Adc

12.0Vdc

PT3304

2Adc

15.0Vdc

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

of the required resistor, either (R1) or R2 as appropriate.

V_a(req’d)

Notes:

3.0

3.1

(363.0)kΩ

(572.0)kΩ

(1200.0)kΩ

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

tion. Place the resistor as close to the ISR as possible.

3.2

3.3

3.4

545.0kΩ

272.0kΩ

181.0kΩ

2. Never connect capacitors from V_oadjust to either GND or

V_out. Any capacitance added to the V_oadjust pin will affect

the stability of the ISR.

3.5

3.6

4.5

(383.0)kΩ

(493.0)kΩ

(675.0)kΩ

(1040.0)kΩ

(2140.0)kΩ

3. V_inGND and V_oGND are connected internally and may

be treated as common on the PT3300 ISR series.

4.6

4.7

4.8

4. If the Remote Sense feature is being used, connecting the

resistor (R1) between pin 3 (V_oadjust) and pin 19 (Remote

Sense) can benifit load regulation.

4.9

5.0

5.1

548.0kΩ

274.0kΩ

182.0kΩ

137.0kΩ

109.0kΩ

5. Adjusting V_outhigher than that defined for the model raises

the minimum input voltage by the same percentage.

5.2

5.3

5.4

Figure 1

5.5

10.8

11.0

11.2

11.4

11.6

12.0

12.2

12.4

12.6

12.8

13.0

13.2

13.5

14.0

14.5

15.0

15.5

16.0

16.5

(448.0)kΩ

(548.0)kΩ

(699.0)kΩ

(951.0)kΩ

(1450.0)kΩ

Vo(Sense)

7,8,9

14 - 17

Vin

V_in

PT3300

V_out

INH

Vin GND

4, 5,

Vo GND

Vo(adj)

(R1)

Adj Down

C _in

100

100V

C _out

330

274.0kΩ

137.0kΩ

91.0kΩ

68.1kΩ

54.4kΩ

45.3kΩ

(Optional)

Adjust Up

COM

Table 1

(425.0)kΩ

(664.0)kΩ

(1379.0)kΩ

PT3300 ADJUSTMENT AND FORMULA PARAMETERS

Series Pt #

PT3301

PT3302

PT3303

PT3304

(nom)

(min)

(max)

(kΩ)

3.3V

3.0V

3.6V

23.7

5.5V

4.5V

5.5V

13.7

12.0V

10.8V

13.2V

4.99

15.0V

13.5V

16.5Vs

3.65

102.0kΩ

50.6kΩ

33.6kΩ

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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PT3302A [TI]

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