TSD-841

更新时间： 2024-11-20 05:53:47

品牌	Logo	应用领域
PMI		变压器 SMPS变压器开关
页数	文件大小	规格书
4页	41K
描述
SWITCH MODE DC/DC POWER CONVERSION TRANSFORMERS

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技术参数
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TSD-841 技术参数

生命周期：	Active	Reach Compliance Code：	unknown
风险等级：	5.69	Is Samacsys：	N
变压器类型：	SMPS TRANSFORMER	Base Number Matches：	1

TSD-841 数据手册

SWITCH MODE DC/DC

POWER CONVERSION

TRANSFORMERS

Premier

Magnetics Inc.

"INNOVATORS IN MAGNETICS TECHNOLOGY"

! Designed for use with Leading Controller Chips

# Provides DC/DC Conversion & Isolation

" Design Engineenring Support Available.

$ Multiple Configurations.

GENERAL APPLICATION INFORMATION

Premier Magnetics' Switch Mode Output transformers have been designed for use with the most popular current-

mode switching regulators such as Linear Technologies LT1X7X & National Semiconductors LM25XX series of High

Efficiency Switching Regulators. These output transformers have been optimized to provide maximum power

throughput in the smallest packages currently available. This combination of components finds wide use in

Distributed Power Systems where a main dc voltage bus is converted for use on or near the circuits being served.

These types of switching regulators provide a very simple solution to power conversion designs. The inductor or

transformer used are critical to the overall performance of the converter and typically define the overall efficiency,

output power and physical size.

The following tables of transformers were designed for use in the Flyback Buck-Boost circuit configuration. This

conversion topology allows the output voltage to be regulated higher or lower than the input voltage. It can also

provide isolated or non-isolated multiple outputs. Typical efficiency of this topology is 75%.

Below is a typical application circuit utilizing Linear Technologies LT1X7X switching regulator in the flyback buck-

boost configuration. The use of Premiers VTP-01XXX or VTK-01XXX optional output filter choke will drastically reduce

output ripple and noise. The component values listed are intended for reference purposes only. The Output Filter(s),

Damper Network & Foldback Current Limiting Network are optional depending on the specific application.

General Component Values:

R3 = 1.0K 1/8W

C3 = 2.2uF Film

R4 = 1.5K 1W Snubber

C4 = .47uF Film

SCHEMATIC

D1 = MBRXXX, Schottky Rectifier

D2 = MBRXXX, Schottky Rectifier

D3 = MBRXXX, Schottky Rectifier

C1 = Electrolytic

R5 = 2.0K 1W

C7 = Electrolytic

C5 = 0.1uF Ceramic

L1 = 10uHy @ Rated DC amps (VTP-XXXX)

L2 = 10uHy @ Rated DC amps (VTP-XXXX)

R6 = 1% Metal Film as needed.

C6 = 1000uF Electrolytic

C8 = 1000uF Electrolytic

OUTPUT FILTER

+Vout2

Np:Ns2

R1 = 1% Metal Film, For 5Vdc = 3.0K, For 9Vdc = 9.09K

R1 = [Vout-Vref/Vref] * R2, where Vref = 1.244 for LT1X7X series

R2 = 1% Metal Film, For 5Vdc = 1.0K, For 9Vdc = 1.5K

C2 = Input Bypass Capacitor 100uF Electrolytic

Isolated Output

-Vout2

FLYBACK Buck-Boost CONVERTER USING LT1X7X

OUTPUT FILTER

RC Snubber

Damper

+Vout1

+Vin

Vin

Vsw

Linear Technology

LT-1X70 = 5A

LT-1X71 = 2.5A

LT-1X72 = 1.25A

LT-107X = 40KHz

LT-117X = 100KHz

Np:Ns1

E1 E2 GND

Specifications subject to change without notice.

pmsm 6/97

20381 BARENTS SEA CIRCLE, LAKE FOREST, CA 92630 • TEL: (949) 452-0511 • FAX: (949) 452-0512 • http://www.premiermag.com

12 3 4

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