ETC 24PCEFA6D

25 to 45 Watt UW Single Series DC/DC Converters
Features
!
Ultra Wide Input Voltage Range
!
Low Noise, Highly Regulated Single Outputs
!
No Derating to 80°C Case Temperature
!
Six-Sided Shielded Low Thermal
Gradient Copper Case
!
Overvoltage Protected Output
!
Pulse by Pulse Digital Current Limiting Thermal
Overload Protection
!
Direct Paralleling of Outputs
!
5 Year Warranty
Description
Selection Chart
These converters are state-of-the-art 100kHz Bipolar based
designs that provide outstanding efficiency of up to 91% at full
load. The output is regulated with a high loop gain feed
forward 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.
Input Range
VDC
MIN
MAX
Model
Output
VDC
Output
mA
12S5.5000UW
7.0
40.0
5.0
5000
24S12.2500UW
14.0
40.0
12.0
2500
24S12.3500UW
14.0
40.0
12.0
3500
24S15.3000UW
17.0
40.0
15.0
3000
Outstanding line and load regulation are achieved over the
full input voltage range and over the specified load current
range by the use of external voltage sensing circuitry. Also
included are a logic shutdown pin to control converter operation
and an output voltage trim pin.
The converters are protected from output shorts to common
by a high speed, pulse by pulse digital, current limit circuit and
a resettable thermal shutdown circuit. The output and the
power switch are overvoltage protected.
25 to 45 Watt UW Single Series Block Diagram
A
+ INPUT 1
PI
INPUT
FILTER
C1
D1
- INPUT 2
6 + OUTPUT
C2
7 CMN
THERMAL SHUTDOWN
VOLTAGE
FEED
FORWARD
PWM
ON/OFF 8
Output
C1
C2
D1
5
1000µF
1000µF
6.8V
12
330µF
47µF
15V
15
330µF
47µF
18V
3 + SENSE
4 TRIM
5 - SENSE
SHIELDED COPPER CASE
2401 Stanwell Drive • Concord, California 94520 • Ph: 925/687-4411 or 800/542-3355 • Fax: 925/687-3333 • www.calex.com • Email: sales@calex.com
1
3/2001
25 to 45 Watt UW Single Series DC/DC Converters
Input Parameters*
Model
Voltage Range
Reflected Ripple, 0-20MHz bw
Input Current Full Load
No Load
Efficiency
Switching Frequency
Maximum Input Overvoltage,
100ms No Damage
Undervoltage Lockout
Turn-on Time, 1% Output Error
MIN
MAX
TYP
MAX
TYP
TYP
TYP
12S5.5000UW
24S12.2500UW
24S12.3500UW
24S15.3000UW
7.0
40.0
35
100
2600
12
81
14.0
40.0
20
70
1380
12
90
14.0
40
20
70
1940
12
90
17.0
40.0
20
70
2050
12
91
Units
VDC
mA P-P
mA
%
TYP
100
kHz
MAX
45
VDC
TYP
TYP
6
35
13
25
Recommended Fuse
13
25
16
25
VDC
ms
(2)
Output Parameters*
Model
Output Voltage
Rated Current (3)
Voltage Range
100% Load
Load Regulation 0-100% Load
Line Regulation
Vin = Min-Max VDC
Short Term Stability (4)
Long Term Stability
Transient Response (5)
Dynamic Response (6)
Input Ripple Rejection (7)
Noise, 0-20MHz bw
Temperature Coefficient
Overvoltage Clamp (8)
Maximum Allowable Voltage Between
Pins 6 and & 7 (9)
Short Circuit Protection to
Common for all Outputs
MIN
MAX
MIN
TYP
MAX
TYP
MAX
TYP
MAX
TYP
TYP
TYP
TYP
TYP
TYP
MAX
TYP
MAX
TYP
VDC
12S5.5000UW
24S12.2500UW
24S12.3500UW
24S15.3000UW
Units
5
0
5000
4.950
5.000
5.050
12
0
2500
11.900
12.000
12.100
12
0
3500
11.900
12.000
12.100
15
0
3000
14.900
15.000
15.100
VDC
0.02
0.2
0.02
0.2
0.02
55
100
60
VDC
%
%
%
0.2
300
150
56
mA
120
135
60
50
130
60
20
60
50
150
%/kHrs
µs
mV peak
dB
mV P-P
ppm/°C
6.8
15
15
20
VDC
6.3
14.0
14.0
18.0
VDC
A
Continuous, 8 Hours Minimum Current Limit and Thermal Overload
NOTES
parameters measured at Tc = 25°C, nominal input voltage
* All
and full rated load unless otherwise noted. Refer to the
CALEX Application Notes for the definition of
terms,
measurement circuits and other information.
(2) Determine the correct fuse size by calculating the maximum DC
current drain at low line input, maximum load then adding 20 to
25 percent.
(3) No minimum load required.
(4) Short term stability is specified after a 30 minute warm-up at full
load and with constant line, load and ambient conditions.
(5) The transient response is specified as the time required to settle
from 25 to 75% step load change (rise time of step = 2µSec.) to
a 1% error band.
(6) Dynamic response is the peak overshoot voltage during the
transient response time defined in note 5 above.
(7) The input ripple rejection is specified for DC to 120Hz ripple with
a modulation amplitude of 1% Vin.
(8)
(9)
(10)
(11)
(12)
(13)
For module protection only, see also note 2.
The user must not let the output at the pins exceed this voltage
due to the combined effects of line drops and output trim.
The logic shutdown pin is Open Collector TTL, CMOS, and relay
compatible. The input to this pin is referenced to input minus and
is protected to +100 VDC.
The functional temperature range is intended to give an additional
data point for use in evaluating this power supply. At the low
functional temperature the power supply will function with no
side effects, however, sustained operation at the high functional
temperature will reduce expected operational life. The data
sheet specifications are not guaranteed over the functional
temperature range.
The case thermal impedance is specified as the case temperature
rise over ambient per package watt dissipated.
Specifications subject to change without notice.
2401 Stanwell Drive • Concord, California 94520 • Ph: 925/687-4411 or 800/542-3355 • Fax: 925/687-3333 • www.calex.com • Email: sales@calex.com
2
3/2001
25 to 45 Watt UW Single Series DC/DC Converters
General Specifications*
All Models
Logic Shutdown (10)
ON Logic Level
or Leave Pin Open
OFF Logic Level
Input Resistance
Converter Idle Current,
Shut Down Pin Low
Output Trim Function
Input Resistance
Programming Range (10)
Programming Voltage
(MIN/ADJ Range)
Programming Linearity
0-5 VDC
Environmental
Case Operating Range
No Derating
Units
MIN
2.4
VDC
MAX
TYP
1.5
2
VDC
kohms
TYP
12
mA
TYP
MIN
TYP
MIN
TYP
MAX
10
15
17
0.0 (+15%)
2.5 (0.0%)
5.0 (-15%)
kohms
TYP
Case Funtional Range (11)
Storage Range
Thermal Impedance (12)
Thermal Shutdown
Case Temperature
General
%
VDC
Better than 1%
MIN
MAX
MIN
MAX
MIN
MAX
TYP
-25
80
-40
90
-55
100
4.4
°C/Watt
TYP
90
°C
Unit Weight
SIDE VIEW
Mechanical tolerances unless otherwise noted:
°C
X.XX dimensions: ±0.020 inches
X.XXX dimensions: ±0.005 inches
°C
7.0
Chassis Mounting Kit
BOTTOM VIEW
°C
Seal around terminals is not hermetic. Do not immerse units in any
liquid.
Pin
Function
1
+INPUT
2
-INPUT
3
+SENSE
4
TRIM
5
-SENSE
6
+OUTPUT
7
CMN
8
ON/OFF
oz.
MS9
Connections for Output Trim
5
5
TRIM UP
6
+ OUTPUT
4
4
10K
± V1
+ SENSE
3
4
3
DC/DC
TRIMPOT
5
± V1
- SENSE
3
- OUPUT
7
FIXED RESISTOR
NOTE: Keep V1 < 0.3 volts for optimum regulation
Typical Performance (Tc=25°C; Full Rated Load)
12S5.5000UW EFFICIENCY Vs. LINE INPUT
12S5.5000UW EFFICIENCY Vs. LOAD
84
LOAD
A
TRIM DOWN
12S5.5000UW INPUT CURRENT Vs. LINE INPUT VOLTAGE
85
5.0
LINE = 12VDC
83
50% FULL LOAD
81
100% FULL LOAD
80
79
78
INPUT CURRENT (AMPS)
LINE = 7VDC
80
EFFICIENCY (%)
EFFICIENCY (%)
82
LINE = 40VDC
75
70
4.0
3.0
2.0
100% FULL LOAD
1.0
77
50% FULL LOAD
76
65
5
10
15
20
25
LINE INPUT (VOLTS)
30
35
40
0.0
0
20
40
60
LOAD (%)
80
100
5
10
15
20
25
30
35
40
LINE INPUT (VOLTS)
2401 Stanwell Drive • Concord, California 94520 • Ph: 925/687-4411 or 800/542-3355 • Fax: 925/687-3333 • www.calex.com • Email: sales@calex.com
3
3/2001
25 to 45 Watt UW Single Series DC/DC Converters
Typical Performance (Tc=25°C; Full Rated Load)
24S12.2500UW EFFICIENCY Vs. LINE INPUT
24S12.2500UW EFFICIENCY Vs. LOAD
24S12.3500UW INPUT CURRENT Vs. LINE INPUT VOLTAGE
85
92
4.0
LINE = 14VDC
80
EFFICIENCY (%)
EFFICIENCY (%)
90
50% FULL LOAD
88
INPUT CURRENT (AMPS)
LINE = 24VDC
100% FULL LOAD
75
70
65
LINE = 40VDC
60
55
86
3.0
2.0
1.0
50% FULL LOAD
50
10
15
20
25
30
35
40
100% FULL LOAD
0.0
0
20
40
LINE INPUT (VOLTS)
60
80
100
10
15
20
12S5.5000UW IDLE CURRENT Vs. LINE INPUT
24S15.3000UW INPUT CURRENT Vs. LINE INPUT VOLTAGE
25
30
35
40
LINE INPUT (VOLTS)
LOAD (%)
24S15.3000UW IDLE CURRENT Vs. LINE INPUT
25
18
3.0
2.0
100% FULL LOAD
1.0
CURRENT (mAMPS)
CURRENT (mAMPS)
INPUT CURRENT (AMPS)
4.0
20
15
16
14
12
50% FULL LOAD
10
0.0
15
20
25
30
35
10
5
40
10
15
LINE INPUT (VOLTS)
20
25
30
35
40
15
20
25
LINE INPUT (VOLTS)
24S12.2500UW
LINE TO OUTPUT TRANSFER FUNCTION
12S5.5000UW
LINE to OUTPUT TRANSFER FUNCTION Vs FREQUENCY
30
35
40
LINE INPUT (VOLTS)
OUTPUT VOLTAGE Vs. OUTPUT LOAD
-20
120
-20
-50
OUTPUT VOLTAGE (%)
ATTENUATION (dB)
-40
-40
-50
-60
100
1K
60
40
0
100
10K
1K
0
10K
20
40
FREQUENCY (Hz)
FREQUENCY (Hz)
60
80
100
120
140
OUTPUT LOAD (%)
OUTPUT VOLTAGE Vs. CASE TEMPERATURE
OUTPUT IMPEDANCE Vs. FREQUENCY
0.4
1
A
0.2
IMPEDANCE (OHMS)
100
80
20
-70
-60
NORMALIZED OUTPUT (%)
ATTENUATION (dB)
-30
-30
0.0
-0.2
-0.4
12V & 15V OUTPUT
.1
5V OUTPUT
.01
-0.6
-0.8
.001
-30
-20
-10
0
10
20
30
40
50
60
70
80
10
CASE TEMPERATURE (Deg C)
100
1K
10K
100K
1M
FREQUENCY (Hz)
2401 Stanwell Drive • Concord, California 94520 • Ph: 925/687-4411 or 800/542-3355 • Fax: 925/687-3333 • www.calex.com • Email: sales@calex.com
4
3/2001