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3

ATW28XXD Series

Notes to Specifications

ATW2812D

1

Parameter guaranteed by line, load and cross regulation tests.

2

Up to 90% of full power is available from either output provided the total output does not exceed 30W.

3

Bandwidth guaranteed by design. Tested for 20KHz to 2MHz.

4

Load current split equally between +V

5

Three-watt load on output under test, 3 watt to 27 watt load change on other output.

6

Capacitive load may be any value from 0 to the maximum limit without compromising dc performance.

A capacitive load in excess of the maximum limit will not disturb loop stability but may interfere with the

operation of the load fault detection circuitry, appearing as a short circuit during turn-on.

7

Parameter shall be tested as part of design characterization and after design or process changes.

Thereafter, parameters shall be guaranteed to the limits specified in Table I.

8

An overload is that condition with a load in excess of the rated load but less than that necessary to

trigger the short circuit protection and is the condition of maximum power dissipation.

9

Load step transition time between 2 and 10 microseconds.

10

Recovery time is measured from the initiation of the transient to where V

percent of V

11

Input step transition time between 2 and 10 microseconds.

12

Turn-on delay time measurement is for either a step application of power at the input or the removal of

ground signal from the inhibit pin (pin 8) while power is applied to the input.

Test

Symbol

Conditions

-55°C

≤Tc ≤+125°C

Vin = 28 Vdc ±5%, C

unless otherwise specified

Group A

Subgroups

Device

Types

Limits

Unit

Min

Max

Output response

transient step line

changes

4, 7, 11

VO

TLINE

Input step from/to 18 to 40

Vdc, I

4,5,6

All

-800

+800

mV pk

Recovery time

transient step line

change

4, 7, 10, 11

TT

LINE

Input step from/to 18 to 40

Vdc, I

4,5,6

All

4000

µs

Turn on overshoot

4

VTon

OS

I

4,5,6

All

750

mV pk

Turn on delay

4, 12

Ton

D

I

4,5,6

All

14

ms

Load fault recovery

7

Tr

LF

4,5,6

All

14

ms

Weight

Flange

75

grams