最新消息: USBMI致力于为网友们分享Windows、安卓、IOS等主流手机系统相关的资讯以及评测、同时提供相关教程、应用、软件下载等服务。

LT8361 SEPIC升压 反相 反激式调节器演示电路说明书

IT圈 admin 38浏览 0评论

2024年3月16日发(作者:斯菡梅)

DEMO MANUAL DC2599A

LT8361

Low I

Q

Boost/SEPIC/

Inverting Regulator

DESCRIPTION

Demonstration circuit 2599A features the LT

®

8361 in a

SEPIC configuration. It operates with a switching fre-

quency of 400kHz and is designed to convert a 4.5V to

48V source to 24V, with up to 600mA output current

(depending on input voltage). Refer to Figure 4 for load

current versus input voltage.

The LT8361 can operate with inputs as high as 60V. How-

ever, in this demo circuit, the input is limited by the voltage

rating of the input capacitors.

The demo board contains a selectable jumper, JP1, to aid

in the selection of the desired Sync pin mode of operation.

The default setting is Burst Mode

®

operation.

This layout is optimized for good EMI performance and

small solution size. Input and output filters and an opti-

mized power switching loop, comprised of C20 and C21

are necessary to pass CISPR 25 Class 5 emissions, and

are added by default. These components can be excluded

in applications not requiring noise immunity. Radiated

emissions plots are included in this manual.

The data sheet gives a complete description of the device,

operation and application information. The data sheet

must be read in conjunction with this demo manual.

Design files for this circuit board are available at

/DC2599A

All registered trademarks and trademarks are the property of their respective owners.

PERFORMANCE SUMMARY

SYMBOL

V

IN

V

OUT

Ripple

Efficiency

Switching Frequency

PARAMETER

Input Supply Range

Output Voltage Range

Specifications are at T

A

= 25°C

CONDITIONS

V

IN

= 12V, I

LOAD

= 450mA

V

IN

= 12V, I

LOAD

= 450mA

V

IN

= 12V, I

LOAD

= 450mA

MIN

4.5

23.2524

200

87

400

TYPMAX

48

24.75

UNITS

V

V

mV

%

kHz

UG-1367 Rev 0

1

DEMO MANUAL DC2599A

QUICK START PROCEDURE

Demo circuit 2599A is easy to set up to evaluate the per-

formance of the LT8361. Refer to Figure 1 for proper

measurement equipment setup and follow the procedure

below:

NOTE: When measuring the input or output voltage ripple,

care must be taken to avoid a long ground lead on the

oscilloscope probe. Measure the input or output voltage

ripple by touching the probe tip directly across the V

IN

or

V

OUT

and GND terminals. See Figure 2 for proper scope

probe technique.

1. With power off, connect the input power supply to V

IN

and GND.

2. Turn on the power at the input.

NOTE: Make sure that the input voltage does not exceed

48V.

3. Check for the proper output voltage.

If there is no output, temporarily disconnect the load

to make sure that the load is not set too high.

4. Once the proper output voltages are established, adjust

the load within the operating range and observe the

output voltage regulation, ripple voltage, efficiency and

other parameters.

+

+

I

IN

+

V

IN

+

+

I

OUT

+

LOAD

POWER

SUPPLY

V

OUT

/8361

DC2599 F01

Figure 1. DC2599A Proper Equipment Setup

VINGND

Figure 2. Measuring Input or Output Ripple

2

UG-1367 Rev 0

2024年3月16日发(作者:斯菡梅)

DEMO MANUAL DC2599A

LT8361

Low I

Q

Boost/SEPIC/

Inverting Regulator

DESCRIPTION

Demonstration circuit 2599A features the LT

®

8361 in a

SEPIC configuration. It operates with a switching fre-

quency of 400kHz and is designed to convert a 4.5V to

48V source to 24V, with up to 600mA output current

(depending on input voltage). Refer to Figure 4 for load

current versus input voltage.

The LT8361 can operate with inputs as high as 60V. How-

ever, in this demo circuit, the input is limited by the voltage

rating of the input capacitors.

The demo board contains a selectable jumper, JP1, to aid

in the selection of the desired Sync pin mode of operation.

The default setting is Burst Mode

®

operation.

This layout is optimized for good EMI performance and

small solution size. Input and output filters and an opti-

mized power switching loop, comprised of C20 and C21

are necessary to pass CISPR 25 Class 5 emissions, and

are added by default. These components can be excluded

in applications not requiring noise immunity. Radiated

emissions plots are included in this manual.

The data sheet gives a complete description of the device,

operation and application information. The data sheet

must be read in conjunction with this demo manual.

Design files for this circuit board are available at

/DC2599A

All registered trademarks and trademarks are the property of their respective owners.

PERFORMANCE SUMMARY

SYMBOL

V

IN

V

OUT

Ripple

Efficiency

Switching Frequency

PARAMETER

Input Supply Range

Output Voltage Range

Specifications are at T

A

= 25°C

CONDITIONS

V

IN

= 12V, I

LOAD

= 450mA

V

IN

= 12V, I

LOAD

= 450mA

V

IN

= 12V, I

LOAD

= 450mA

MIN

4.5

23.2524

200

87

400

TYPMAX

48

24.75

UNITS

V

V

mV

%

kHz

UG-1367 Rev 0

1

DEMO MANUAL DC2599A

QUICK START PROCEDURE

Demo circuit 2599A is easy to set up to evaluate the per-

formance of the LT8361. Refer to Figure 1 for proper

measurement equipment setup and follow the procedure

below:

NOTE: When measuring the input or output voltage ripple,

care must be taken to avoid a long ground lead on the

oscilloscope probe. Measure the input or output voltage

ripple by touching the probe tip directly across the V

IN

or

V

OUT

and GND terminals. See Figure 2 for proper scope

probe technique.

1. With power off, connect the input power supply to V

IN

and GND.

2. Turn on the power at the input.

NOTE: Make sure that the input voltage does not exceed

48V.

3. Check for the proper output voltage.

If there is no output, temporarily disconnect the load

to make sure that the load is not set too high.

4. Once the proper output voltages are established, adjust

the load within the operating range and observe the

output voltage regulation, ripple voltage, efficiency and

other parameters.

+

+

I

IN

+

V

IN

+

+

I

OUT

+

LOAD

POWER

SUPPLY

V

OUT

/8361

DC2599 F01

Figure 1. DC2599A Proper Equipment Setup

VINGND

Figure 2. Measuring Input or Output Ripple

2

UG-1367 Rev 0

发布评论

评论列表 (0)

  1. 暂无评论