Trim – GE Industrial Solutions Zephyr Non-Isolated SMT User Manual
Page 18
Zephyr Non-Isolated SMT DC-DC Power Module:
0.8V to 3.5V @ 20A Output, 5V to 12V Input
LINEAGE
POWER
18
Data Sheet
March 31, 2010
Trim
T
RIM
pin is provided to margin high/low the output voltage by certain percentages independent of the output
voltage. The equation to margin low by connecting a resistor, R
LOW
, from T
RIM
pin to O
UTSENSE
+ pin is:
OUT
NOM
NOM
OUT
LOW
V
V
V
V
R
⋅
−
⋅
⋅
−
⋅
=
2
2
621
654
[k
Ω
]
(6)
To margin low by 2.5%, R
LOW
= 332.0 k
Ω. Shorting T
RIM
pin to O
UTSENSE
+ pin provides the maximum
negative adjustment of 5.0%.
The equation to margin high by connecting a resistor, R
HIGH
, from T
RIM
pin to O
UTSENSE
– pin is:
NOM
OUT
OUT
NOM
HIGH
V
V
V
V
R
⋅
−
⋅
⋅
−
⋅
=
2
2
588
621
[k
Ω
]
(7)
To margin high by 2.5%, R
HIGH
= 365.0 k
Ω. Shorting T
RIM
pin to O
UTSENSE
– pin provides the maximum
positive adjustment of 5.0%.
If T
RIM
is not connected to O
UTSENSE
+ or O
UTSENSE
−
, V
OUT
= V
NOM
.