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5

ATW28XXD Series

Notes to Specifications

ATW2815D

1

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

2

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

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

3

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.

4

Above +125

°C case, derate output power linearly to 0 at +135°C case.

5

Input step transition time between 2 and 10 microseconds.

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 will interfere with the operation of the load fault detection circuitry,

appearing as a short circuit during turn on.

7

Load step transition time between 2 and 10 microseconds.

8

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

9

Load current split equally between +V

10 When operating with unbalanced loads, at least 25% of the load must be on the positive output to maintain regulation.

11 Parameter guaranteed by line and load regulation tests.

12 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 II.

13

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

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

5, 12

VO

TLINE

Input step from/to 18 to

40VDC

4,5,6

All

+180

mV pk

Input step from 40 to18 VDC

4,5,6

All

-600

mV pk

Recovery time

transient step line

changes

1. 5, 12

TT

LINE

Input step from/to 18 to 40

VDC

4,5,6

All

400

µs

Input step from 40 to 18 VDC

4,5,6

All

400

µs

Turn on overshoot

VTon

OS

I

4,5,6

All

750

mV pk

Turn on delay

2

Ton

D

I

4,5,6

All

12

ms

Load fault recovery

12

Tr

LF

V

4,5,6

All

12

ms

Weight

Flange

75

grams