v7ah-02a330 Bel Fuse Inc., v7ah-02a330 Datasheet - Page 16

• Manufacturer Part Number: v7ah-02a330
• Description: Module Dc-dc 1-out 3.3v 2a 6.6w 5-pin
• Manufacturer: Bel Fuse Inc.

Output Voltage Set-Point Adjustment
x7AH-02A1Ax Trim Resistor Calculation
Rtrim up =
Note: Output voltage Vo=0.90 3V when trim pin is not connected.
page 16
BP04x7AH-02A
©2004 Bel Fuse Inc.
POWER PRODUCTS
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel [phone] • Fax [phone] • www.belfuse.com
(
Specifications subject to change without notice. 03.04
Vo, adj – Vo
3.712
GND
T
GND
V
T
rim
V
O
rim
O
)
Kohm
R
R
set
s
R
NON-ISOLATED DC/DC CONVERTERS
t
12V Input / 0.9V – 5.0V Output / 2A
R
R
down
up
Rdown =
V
t
Note: Output voltage Vo=0.90 3V when trim pin is not connected.
Note: Output voltage Vo=0.90 3V when trim pin is not connected.
Rtrimup V adj_up
Rup =
Margin down value after output volatge is set with Rset
Rt (Kohm) =
Margin up value after output voltage is set with Rset
(
(
0.903 Rset + 3.712 - Rset • Vm down
4.64 Rset • Vm down - 3.712 Rset
(
50
)
0
Rset • Vm up - 0.903 Rset - 3.712
50
45
40
35
30
25
20
15
10
Rset =
5
0
0.9 1.17 1.45 1.72 1.99 2.26 2.54 2.81 3.08 3.36 3.63
0.9
Vout is desired output voltage.
(
Vm down > 90% Vout
(
3.712 - Rs(Vout - 0.903)
Vout - 0.903
3.712 Rset
Rs (4.64Vt - 3.712)
Adjuste d output voltag e Vo,adj(V )
3.712
V adj_up
)
Kohm
)
)
)
Kohm
Kohm
Kohm
3.63