15 Watt XC Single Series DC/DC Converters
Manufacturing Company, Inc. Concord, California 94520 Ph: 925/687-4411 or 800/542-3355 Fax: 925/687-3333 www.calex.com Email: sales@calex.com
1
DOUBLE SHIELDED
ISOLATION TRANSFORMER
LC
INPUT
FILTER
CURRENT
MODE
PWM
FEEDBACK
AMPLIFIER
SIX-SIDED SHIELDED
COPPER CASE
LOW TC
BANDGAP
REFERENCE
THERMAL SHUTDOWN
1.5 MEG || 0.01 F
C1
C2
D1
1
2
8
+ INPUT
- INPUT
ON/OFF
6
7
4
+ OUTPUT
CMN
TRIM
15 Watt XC Single Series Block Diagram
Description
These single output converters are designed for wide input
range, low noise, telecommunications, medical, industrial and
instrument applications. The extra wide input range (3:1) is
ideal for battery or unregulated input applications.
These converters are state-of-the-art 70kHz MOSFET
based designs that provide outstanding line and load regulation.
The single outputs are regulated with a high loop gain
current mode control method that provides linear regulator
type performance with a true, high efficiency switching DC/DC
topology. The large amount of loop gain insures excellent
input ripple rejection and line transient response.
A logic shutdown pin to control converter operation is
included. The XC Single Series is protected from output
shorts to common by a high speed, pulse by pulse digital,
current limit circuit.
t
u
p
t
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O1
C2
C1
D
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0
1F
8
6V
8
.
6
2
1F
0
3
3F
5
1V
5
1
5
1F
0
3
3F
5
1V
8
1
Features
!
Extra Wide 3:1 Input Voltage Range (9-27, 24-72)
!
Low Noise, Highly Regulated Single Outputs
!
No Derating to 80°C Case Temperature
!
Six-Sided Shielded Low Thermal Gradient
Copper Case
!
500 VDC Minimum Input to Output Isolation
!
Overvoltage Protected Input and Outputs
!
Pulse by Pulse Digital Current Limiting
!
Direct Output Parallel for More Power
!
5 Year Warranty
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