PT4856C

更新时间： 2024-11-07 13:12:35

品牌	Logo	应用领域
德州仪器 - TI		转换器
页数	文件大小	规格书
13页	233K
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PT4856C 数据手册

PT4850 Series

25-A Triple Output Isolated DC/DC

Converter For Logic Applications

SLTS166C - FEBRUARY 2002 - REVISED MARCH 2003

Features

• Triple Logic Voltage Outputs

• Dual Logic On/Off Control

• Fixed Frequency Operation

• Solderable Space Saving Package:

1.97 sq. in. PCB Area (suffix N)

(Independently Regulated !)

• Input Voltage Range:

36V to 75V

• 1500VDC Isolation

• IPC Lead Free 2

• Safety Approvals Pending:

UL60950

• Over-Current Protection

• Over-Voltage Protection

• Over-Temperature Shutdown

• Under-Voltage Lockout

• Independently Adjustable Outputs

CSA 22.2 950

VDE EN60950

Description

Ordering Information

PT4851o = +3.3/+2.5/+1.5V

PT4852o = +3.3/+1.8/+1.5V

PT4853o = +3.3/+2.5/+1.2V

PT4854o = +3.3/+1.8/+1.2V

PT4855o = +3.3/+1.5/+1.2V

PT4856o = +5.0/+3.3/+1.5V

The PT4850 Excalibur™ power

modules are a series of isolated triple-

output DC/DC converters that

operate from a standard (–48V)

central office supply. These modules

are rated for a combined output of

up to 25A, and were designed for

powering mixed logic applications.

The triple-output voltage provides

a compact multiple-output power

supply in a single DC/DC module.

Output voltage options include

a low-voltage output for a DSP or

ASIC core, and two additional supply

voltages for the I/O, and other func-

tions.

The PT4850 series incorporates

many features to simplify system

integration. These include a flexible

On/Off enable control, input under-

voltage lockout and over-temperature

protection. All outputs are current

limited and short-circuit protected,

and are internally sequenced to meet

the power-up and power-down re-

quirements of popular DSP ICs.

The PT4850 series is housed in

a space-saving solderable case. The

module requires no external heat

sink. Both vertical and horizontal

pin configurations are available, in-

cluding surface mount.

PT Series Suffix

(PT1234x)

Case/Pin

Order

Package

Code

Configuration

Suffix

Vertical

Horizontal

SMD

(EKD)

(EKA)

(EKC)

(Reference the applicable package code drawing for

the dimensions and PC layout)

Standard Application

PT4850

I/O

9,10,11

+Vo₁

V₁Adj

COM

+V_IN

Co₁

12,13,14

V₂Sense

+Vo₂

Logic

Core

15,16

DSL, DSP,

or ASIC

Chipset

C_IN

V₂Adj

EN 2

Co₂

EN 1

V₃Sense

+Vo₃

22,23

–V_IN

V₃Adj

Co₃

1 =Inhibit

COM

18,19,20

C_in=Optional

Co₁, Co₂, Co₃=Optional. See specifications

EN1 & EN2 operation: See application notes

For technical support and more information, see inside back cover or visit www.ti.com

12 3 4 5 6 7...13

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