123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
123456789012345678901234567890121234567
1
All specifications are typical at nominal line and full load at 25°C unless
otherwise noted and are subject to change without notice.
10 to 40 Watts
Single Outputs
!!
!!
! 9-18 Vdc inputs
18-32 Vdc inputs
!!
!!
! Efficiency to 80%
!!
!!
! Regulated output
The SW and CW Series are highly
efficient, single output DC/DC
converters. Proportional energy
transfer techniques enable these
encapsulated modular converters to
maintain well regulated outputs despite
large variations in input voltage. The
2:1 input range makes the SW and CW
Series ideal for applications where the
input dc power is derived from a
battery, a motor generator or other
types of poorly regulated power
sources.
Due to a high efficiency design these
converters operate with no derating
over the entire operating range to
+71°C.
The output of the SW and CW Series
can be trim-adjusted by user added
circuitry to fine tune for optimum supply
voltage
Applications
The SW and CW Series are designed
for battery-powered or portable, space-
critical applications, as well as other
applications not requiring input-output
isolation.
SW, CW Series
INPUT
Voltage Range 9-18Vdc
18-32 Vdc
OUTPUT
Voltage Tolerance ± 2% (trim adjustable)
Ripple and Noise 7mVRMS to 3 Amps
13 mVRMS >3 Amps
Overvoltage Protection Available with crowbar
add option C
Short Circuit Protection Power Foldback
Trim Adjustability ±10% (typ)
Temperature Coefficient 0.02% / °C
GENERAL
Regulation:
Line 0.3% Output to 3 Amps
0.5% Output above 3 Amps
Load 0.3% Output to 3 Amps
0.5% Output above 3 Amps
Efficiency 60-80% (typ)
I/O Isolation Not galvanically isolated
ENVIRONMENTAL
Operating Temperature -25°C to +71°C No Derating
Storage Temperature -25°C to +105°C
Cooling Free-air Convection
249 Range Road Windham, NH 03087 (603) 893-2330 FAX (603) 893-6280
SW, CW Series Ordering Information
Dimensions and Connections
Input Voltage Output Output Model
Range Voltage Current Case Number Options
9-18 Vdc 5 Vdc 2000mA 2 SW11-200-12
9-18 Vdc 5 Vdc 2000mA 1B CW11-200-12
18-32 Vdc 5 Vdc 2000mA 3 SW11-200-24 C
18-32 Vdc 5 Vdc 2000mA 1B CW11-200-24
9-18 Vdc 5 Vdc 3000mA 4B SW11-300-12 C
9-18 Vdc 5 Vdc 3000mA 1C CW11-300-12 C
18-32 Vdc 5 Vdc 3000mA 4B SW11-300-24 C
18 -32 Vdc 5 Vdc 3000mA 1C CW11-300-24 C
9-18 Vdc 5 Vdc 4000mA 4B SW11-400-12 C
9-18 Vdc 5 Vdc 4000mA 1C CW11-400-12 C
18-32 Vdc 5 Vdc 4000mA 4B SW11-400-24 C
18 -32 Vdc 5 Vdc 4000mA 1C CW11-400-24 C
9-18 Vdc 5 Vdc 6500mA 1D CW11-650-12 C
18-32 Vdc 5 Vdc 6500mA 1D CW11-650-24 C
9-18 Vdc 5 Vdc 8000mA 1D CW11-800-12 C
18-32 Vdc 5 Vdc 8000mA 1D CW11-800-24 C
18-32 Vdc 12 Vdc 2000mA 3 SW12-200-24
18-32 Vdc 12 Vdc 2000mA 1C CW12-200-24
18-32 Vdc 12 Vdc 3500mA 4D SW12-350-24
18-32 Vdc 12 Vdc 3500mA 1D CW12-350-24
18-32 Vdc 15 Vdc 2000mA 3 SW13-200-24
18-32 Vdc 15 Vdc 2000mA 1C CW13-200-24
PIN CONNECTIONS
Single Output
1. +Input
2. -Input
3. +Output
4. Trim
5. Common
NOTES:
1. Ripple measured with a 3.3 mf tantalum capacitor
across each output.
2. Load regulation from full load to minimum load
(25%).
3. External Output Trimming: Output may be
externally trimmed ±5%.
11/01/2001
Fig 1
Fig 2
Fig 3
Fig 4
