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SIL25C Series | 25 A DC-DC Converter C Class Non-Isolated
SIL25C SERIES
Single negative output
Trim range (-4.5 Vdc to -5.5 Vdc) High power density design means reduced board space requirement Remote sense Power good output signal (open collector) Operating ambient temperature to 80 C with suitable derating and forced air cooling Remote ON/OFF (active high) Overtemperature protection 0 A minimum load Input undervoltage lockout Overcurrent and short-circuit protection Available RoHS compliant
The SIL25C is a new high density nonisolated dc-dc converter. The converter has a wide input range (10.2 Vdc to 13.8 Vdc) and offers a -4.5 Vdc to -5.5 Vdc output voltage range with a 25 A load. The series offers remote ON/OFF, overtemperature protection and over-current protection as standard.
The remote sense feature enables the SIL25C compensate for voltage drops between the converters output and the load. With full international safety approvals including EN60950 and UL/cUL60950 the SIL25C reduces compliance costs and time to market.
[ 2 YEAR WARRANTY ]
File Name: lf_SIL25C_12_neg.pdf Rev (02): 22 Dec 2005
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SIL25C Series | 25 A DC-DC Converter C Class Non-Isolated
Absolute Maximum Ratings Characteristic Input voltage - continuous Operating temperature Symbol Vin (cont) Top Min -0.3 -40 Typ Max 13.8 80 Units V DC C Notes and Conditions Vin(+) - Vin(-) Measured at thermal reference points, see Note 1. Higher ambient operation possible with forced air cooling. See de-rating curves Power Good pull-up voltage Storage temperature Output current Tstorage Iout -40 0 15 125 25 V C A
All specifications are typical at nominal input Vin = 12V, full load under any resistive load combination at 25C unless otherwise stated.
Input Characteristics Characteristic Input voltage - operating Input current - no load Input current - Quiescent Input voltage variation Symbol Vin (oper) lin lin (off) dv/dt Min 10.2 Typ 12.0 280 30 1.0 Max 13.8 400 40 Units V DC mADC mADC V/ms Vin (min) - Vin (max), enabled Converter disabled Notes and Conditions
Turn On/Off Characteristic Input voltage - turn on Input voltage - turn off Turn on delay - enabled, then power applied Symbol Vin (on) Vin (off) Tdelay (power) Min 8.5 8.5 Typ 10.0 9.5 Max 10.2 10.0 30 Units V DC V DC msec With the Remote ON/OFF signal asserted, this is the time from when the input voltage reaches the minimum specified operating voltage until the POWER GOOD is asserted high Vin = Vin (nom), then Remote ON/OFF asserted. This is the time taken until the POWER GOOD is asserted high Output voltage in full regulation to POWER GOOD asserted high From 10% to 90%; full resistive load, 2 x 680F external capacitance Notes and Conditions
Turn on delay - power applied, then Remote ON/OFF asserted Output to Power Good delay Rise time
Tdelay (Remote ON/OFF)
20
msec
Tdelay Trise 8
20
msec msec
File Name: lf_SIL25C_12_neg.pdf Rev (02): 22 Dec 2005
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SIL25C Series | 25 A DC-DC Converter C Class Non-Isolated
Signal Electrical Interface Characteristic - Signal Name Symbol At remote/control ON/OFF pin Open collector or equivalent compatible Control pin open circuit voltage Vih High level input current Iih Min Typ Max Units Notes and Conditions See Notes 2 and 3 See Application Note 148 for Remote ON/OFF details Iih = 0 A; open circuit voltage Current flowing into control pin when pin is pulled high (max. at Vih = 13.8V) Converter guaranteed on when control pin is greater than Vih (max) Converter guaranteed off when control pin is less than Vil (max) ViI = 0.0 V;
2.6
4 1
V A
High level input voltage
Vih
2.50
Vin
Low level input voltage
ViI
1.20
V
Low level input current
Iil (max)
1.3
mA
Reliability and Service Life Characteristic Mean time between failure Symbol MTBF Min 282,000 Typ Max Units Hours Notes and Conditions MIL-HDBK-217F, Vin = Vin (nom); Iout = Iout (max); ambient 25C; ground benign environment Telcordia SR-332 Issue 3, ground benign, temp. = 40C, Vin = Vin (nom), Iout = Iout (max)
Mean time between failure
MTBF
3,000,000
Hours
File Name: lf_SIL25C_12_neg.pdf Rev (02): 22 Dec 2005
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SIL25C Series | 25 A DC-DC Converter C Class Non-Isolated
Other Specifications
Characteristic Switching frequency Weight Symbol Fsw Min Typ 250 28.3 Max Units kHz g Notes and Conditions Per phase, (2 phase)
Safety Agency Approvals
Characteristic UL/cUL 60950 File No. TBD TUV Product Service IEC 60950 Certificate No. TBD
Material Ratings
Characteristic - Signal Name Notes and Conditions Flammability rating Material type UL94V-0 FR4 PCB
Model Numbers
Model Number SIL25C-12SNEG-VJ Input Voltage 12VDC Output Voltage -4.5V to -5.5V Output Current (Max.) 25A Typical Efficiency 90% Max. Load Regulation 1.0%
RoHS Compliance Ordering Information The `J' at the end of the part number indicates that the part is Pb-free (RoHS 6/6 compliant). TSE RoHS 5/6 (non Pb-free) compliant versions may be available on special request, please contact your local sales representative for details.
File Name: lf_SIL25C_12_neg.pdf Rev (02): 22 Dec 2005
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SIL25C Series | 25 A DC-DC Converter C Class Non-Isolated
SIL25C-12SNEG-VJ Input Characteristics
Characteristic Input current - operating Symbol Iin Iin (ripple) Min Typ 11.6 Max Units A DC Notes and Conditions Vin = Vin (nom); Iout = Iout (max.)
Reflected ripple current
60 300
mA RMS Iout = Iout (max.), measured mA pk-pk with external filter. See Application Note 148 for details F
Input capacitance - internal filter Input capacitance - external input
Cinput Cbypass
18.8
800
F
Recommended customer added capacitance
SIL25C-12SNEG-VJ Electrical Characteristics - O/P
Characteristic Nominal set-point voltage Symbol Vo (nom) Min -4.85 Typ -5.05 Max -5.25 Units V DC Notes and Conditions Vin = Vin (nom); Iout = Iout (NL) Worst case condition over line, load, temperature and life Iout = Vin (min) to Vin (max) Vin = Vin (nom); Iout (min) to Iout (max)
Line regulation Load regulation
1.0 1.0
% %
Output current continuous Output current - short circuit
Iout Isc Vp-p Vrms
0
25 23.9
A DC A rms Continuous, unit auto recovers from short
Output voltage - noise
100 50
mV pk-pk Measurement bandwidth 20 MHz mV rms See Application Note 148 for measurement set-up details
File Name: lf_SIL25C_12_neg.pdf Rev (02): 22 Dec 2005
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SIL25C Series | 25 A DC-DC Converter C Class Non-Isolated
SIL25C-12SNEG-VJ Electrical Characteristics - O/P
Characteristic Load transient response peak deviation Load transient response recovery Symbol Vdynamic Trecovery Min Typ 75 Max Units mV Notes and Conditions Peak deviation for 50% to 75% step load, di/dt = 1A/s Settling time to within 1% of output set point voltage for 50% to 75% step load Maximum capacitor value may vary with load conditions
150
sec
External load capacitance
Cext
1360
F
SIL25C-12SNEG-VJ Protection and Control Features
Characteristic Overcurrent limit inception Open sense voltage Symbol Ioc Min Typ 35 -5.05 Max Units A DC V DC Notes and Conditions Vo = 90% of Vo (nom) Sense pins not connected
SIL25C-12SNEG-VJ Efficiency
Characteristic Efficiency Symbol Min 89.0 Typ 90.4 Max Units % Notes and Conditions Iout = 100% Iout (max), Vin = Vin (nom) Iout = 50% Iout (max), Vin = Vin (nom)
Efficiency
90.7
92.7
%
File Name: lf_SIL25C_12_neg.pdf Rev (02): 22 Dec 2005
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SIL25C Series | 25 A DC-DC Converter C Class Non-Isolated
SIL25C-12SNEG-VJ
30
OUTPUT CURRENT (A) EFFICIENCY (%)
94 92 90 88 86 84 82 80 0 20 40 60 80 AMBIENT TEMPERATURE (C)
Figure 1: Thermal De-rating Curve Airflow Direction from Pin 24 to Pin 1
Low Line Nom Line High Line
25 20 15 10 5
1.0m/s 1.5m/s 2.0m/s 3.0m/s
0
5
10
15
20
25
OUTPUT CURRENT (A)
Figure 2: Efficiency vs Load and Line
Figure 3: Short Circuit Characteristic (Channel 4: Output Current at 10A/div, Channel 2: Output Voltage)
Figure 4: Transient Response 50-75% - 50%, 1A/S (Channel 2: Current load step at 5A/div, Channel 3: Output Voltage deviation)
Figure 6: Typical Power Up (Channel 2: DC Input, Channel 3: Output Voltage)
Figure 7: Control On/Off (Channel 2: Remote ON/OFF, Channel 3: Output Voltage Channel 4: Power Good)
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File Name: lf_SIL25C_12_neg.pdf Rev (02): 22 Dec 2005 File Name: lf_SIL25C_12_neg.pdf Rev (02): 22 Dec 2005
SIL25C Series | 25 A DC-DC Converter C Class Non-Isolated
SIL25C-12SNEG-VJ
Figure 8: Typical Ripple and Noise
File Name: lf_SIL25C_12_neg.pdf Rev (02): 22 Dec 2005
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SIL25C Series | 25 A DC-DC Converter C Class Non-Isolated
2.400 [60.96]
ID LABEL LOCATION
0.520 [13.21]
[31.75] 1.250
0.470 [11.94] 0.158 [4.02]
0.100 [2.54]
TYP.
PIN 1
Dimensions in Inches Approx Metric Equiv in (mm) Third Angle Projections Tolerances (unless otherwise specified) 3 Places 0.010 (0.250)
0.140 [3.56]
0.2600.030 [6.600.760]
Pin Connections
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Function TRIM Not Connected Ground POWER GOOD No Pin Not Connected Ground Ground Remote ON/OFF Remote Sense (GND) Remote Sense (O/P) Vin Vin Vin Vout Vout Ground Vout Ground Vout Ground Vout Ground Vout
Figure 9: Mechanical Drawing and Pinout Table
File Name: lf_SIL25C_12_neg.pdf Rev (02): 22 Dec 2005
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0.140 [3.56]
SIL25C Series | 25 A DC-DC Converter C Class Non-Isolated
Note 1
Thermal reference point is defined as the highest temperature measured at any one of the specified thermal reference points.
Note 2
The control pin is referenced to Vin-
Note 3
The SIL25C is supplied as standard with active High logic. Control input pulled low: Unit Disabled Control input left open: Unit Enabled
Note 4
Thermal reference set up: Unit mounted on an edge card test board 215mm x 115mm. Test board mounted vertically. For test details and recommended set-up see Application Note 148.
Note 5
3-200Hz, sweep at 1/2 octave/min from low to high frequency, and then from high to low. Thirty minute dwell at all resonant points.
CAUTION: Hazardous internal voltages and high temperatures. Ensure that unit is accessible only to trained personnel. The user must provide the recommended fusing in order to comply with safety approvals.
File Name: lf_SIL25C_12_neg.pdf Rev (02): 22 Dec 2005
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SIL25C Series | 25 A DC-DC Converter C Class Non-Isolated
NORTH AMERICA
e-mail: sales.us@artesyn.com
800 769 7274 + 508 628 5600
EUROPEAN LOCATIONS
e-mail: sales.europe@artesyn.com
IRELAND + 353 24 93130 AUSTRIA + 43 1 80150
FAR EAST LOCATIONS
e-mail: sales.asia@artesyn.com
HONG KONG + 852 2699 2868
Longform Datasheet (c) Artesyn Technologies(R) 2005 The information and specifications contained in this datasheet are believed to be correct at time of publication. However, Artesyn Technologies accepts no responsibility for consequences arising from printing errors or inaccuracies. Specifications are subject to change without notice. No rights under any patent accompany the sale of any such product(s) or information contained herein.
File Name: lf_SIL25C_12_neg.pdf Rev (02): 22 Dec 2005
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