PCN-BE090220

123333
Product Change Notice
PCN #: BE090220
Date: February 23, 2009
Re: High Boost HAM
To Our Valued Customers:
We appreciate your use of Vicor modules. The purpose of this notice is to inform you of a
specification change
PCN Type:
Notice of a specification change .
Product(s) Affected:
High Boost HAM
VI-HAM-xL, VI-HAMD-xL, VI-BAMD-xL
VE-HAM-xL, VE-HAMD-xL, VE-BAMD-xL
Specification Changes:
The high boost HAM power de-rating below 110Vac has been changed from 9 watts/Vac to 11
watts/Vac (see attached chart). This results in a power reduction throughout this range with the
maximum reduction at 85Vac. At 85Vac, maximum power has been reduced from 450W to
400W.
Customer Impact:
Customer impact is believed to be low. Most applications should have enough margin to
absorb this change with no negative effect. Customers who do experience problems
should contact the factory about having their HAMs specially screened to meet the
previous power levels.
Reliability/qualification summary
There have been no internal changes to the HAM. This is strictly a specification change. No
requalification was necessary.
Timing of the change
Immediate.
123333
HAM Derating
700
650
Output Power
600
Previous`
New
550
500
450
400
85
90
95
100
105
AC Input Voltage
Company Contact:
Applications Engineering
Vicor Corporation
25 Frontage Road
Andover, MA 01810
[email protected]
110
115
120