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3

ASA28XXD Series

Notes to Specifications

1.

Parameter guaranteed by line, load, and cross regulation tests.

2.

Up to 80% of full power is available from either output provided the total output does not exceed 5W.

3.

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

4.

Load current split equally between +V

5.

1.0W load on output under test, 1.0W to 4.0W 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.

8.

An overload is a condition with a load in excess of rated 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

µs and 10µs.

10.

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

11.

Input step transition time between 2

µs and 10µs.

12.

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

enable pin (pin 5) with power applied to the input.

Block Diagram

Controller

Error

Amplifier

1

2

8

6

7

5

Case

Output

Return

+Output

Inhibit

Input

Return

+Input

3

-Output