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Details, datasheet, quote on part number:RCH28515TE
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Datasheet text preview:
ISO-9001 CERTIFIED BY DSCC
M.S.KENNEDY CORP.
4707 Dey Road Liverpool, N.Y. 13088
30W TRIPLE DC-DC CONVERTERS
QCH28515T/ RCH28515T
(315) 701-6751
HI-REL DESIGN
REPLACES APEX DT28515T/F WAVE SOLDERABLE PACKAGE ALL CERAMIC CAPACITORS NO OPTOCOUPLERS SURFACE MOUNT MAGNETICS WITHSTANDS 3000 G Y1 AXIS OVER-VOLTAGE PROTECTION (OVP) OPTION
OTHER FEATURES TRIPLE OUTPUT
NO DERATING 55°C TO +125°C WIDE SUPPLY RANGE 16 TO 40 VOLTS HIGH ISOLATION 500V HIGH POWER DENSITY 23 W/in3 REMOTE SHUTDOWN EXTERNAL SYNCH INPUT (FULLY TTL COMPATIBLE OPTION)
QCH28515T
RCH28515T
BLOCK DIAGRAM
INPUT MAGNETICS AND FILTER ħ 15 V LINEAR REGS POWER MAGNETICS OUTPUT MAGNETICS AND FILTER
+Aux
DESCRIPTION
The QCH28515T/RCH28515T series of DC-DC converters provides the ruggedness, reliability and features required to meet the advanced challenges of today's hi-rel market. This family of converters uses all surface-mounted hybrid components including magnetics, all ceramic capacitors and ultrasonic wirebonds to give long life in full temperature range and high acceleration environments. There is no power derating anywhere in the 55°C to 125°C operating range. This product family is tolerant of many types of faults including load short, load overload, loss of voltage feedback, large forward and reverse voltages applied to the synchronization pin and input overvoltage. This converter family will operate during input transients to 80 volts. The output voltages have little overshoot during the input voltage transient such that typical logic and linear parts on the outputs will stay well within data sheet absolute maximums. Other operational features include low duty factor current limit and dynamic current limit threshold. The current limit operates in a cyclic on-off mode with an on time of about 2 milliseconds and an off time of 20 milliseconds for a duty factor of about 10 percent. This limits the converter dissipation to about 1 watt, so there is no danger of overheating during an output fault at 125° C. The dynamic current limit threshold allows over 50 percent more current to flow for a short time after power application, release from shutdown or recovery from previous current limit allowing large load capacitances to be charged during turn-on. This converter family is a push-pull 400 kHz forward converter with full isolation between the input side, output side and case. This isolation is achieved without optocouplers for an even greater margin of reliability. The converter is housed in a power DIP package and is hermetically sealed. The RCH28515T has tabs for bolting the device down. 1
Aux
Vin
PUSHPULL PWM FEEDBACK MAGNETICS
MAIN OUTPUT
PRIMARY SIDE FAILSAFES
SECONDARY SIDE FAILSAFES
EXTERNAL CONNECTIONS
POSITIVE INPUT +5 OUT OUT COMMON 15 OUT +15 OUT 1 10 INPUT COMMON SYNCH INHIBIT CASE GND CASE GND
2 3 4 5
9 8 7 6
TOP VIEW
PRELIMINARY Rev. 5/01
QCH28515T/RCH28515T
ABSOLUTE MAXIMUM RATINGS
ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS
SPECIFICATIONS
TEST CONDITIONS
INPUT VOLTAGE RANGE INPUT VOLTAGE TRANSIENT RANGE OUTPUT WITHSTAND VOLTAGE STORAGE TEMPERATURE OPERATING TEMPERATURE TEMPERATURE, pin soldering 10 seconds
0 to 50 VDC 80V@50mS 25 VDC 65 to +150°C 55 to +125°C 300 °C MAX
Unless noted: 55°C TCASE 125°C, 16Vdc VIN 40Vdc, PMAIN = 20W, P+AUX = P-AUX = 5W.
PARAMETER SYMBOL GROUP A S U B G R O U P MIN
12
TYPICAL
MAX
UNITS
COMMENT
INPUT VOLTAGE
VIN
No load to full load
1, 2, 3
0 16 50
28
50 40 80
Vdc Vpk Vdc Adc
Normal Operating1 Transient
UVLO INPUT CURRENT
VUVLO IIN NoLoad Full load2 Inhibited
1, 2, 3 1, 2, 3
10 1.25 0.0001
12.5 0.12 1.57 0.002 4.00 0.33 -0.33
14 1.65 0.005 6.00 0.66 -0.66 5.05 15.15 -15.15 5.9 6.10 30 20 30 65
(5)
OUTPUT CURRENT
3
IMAIN I+AUX I-AUX
1 2, 3 1 2, 3 1 2,3 1 2,3 1 2, 3 1 2, 3 1 2, 3 PMAIN PħAUX PTOT POVERLOAD 1, 2, 3 4.95 14.85 -14.85 5.3 5.14 0 0 0 30 1 2, 3 VIN 16-40V 1 2, 3 1 2, 3
Adc
OUTPUT VOLTAGE
2,4
VMAIN V+AUX V-AUX
5.0 15.00 -15.00 5.6 20 10 35 63 5 10 50 120 5 20 50 150
Vdc
OVP
4
VOVP PO U T
Vdc W
OUTPUT POWER
EFFICIENCY
2
VR LINE
% 10 50 75 150 20 50 75 250 Aux mV Main Aux mV Main
LINE REGULATION
LOAD REGULATION
VRLOAD
IM A I N 04A ħIAUX 00.33A
1 2, 3 1 2, 3
2
PRELIMINARY Rev. -
5/01
SPECIFICATIONS
QCH28515T/RCH28515T
Unless noted: 55°C TCASE 125°C, 16Vdc VIN 40Vdc, PMAIN = 20W, P+AUX = P-AUX = 5W.
PARAMETER SYMBOL TEST CONDITIONS GROUP A S U B G R O U P MIN
12
TYPICAL
MAX
UNITS
COMMENT
CROSS REGULATION
VRCROSS
ħIAUX 00.33A IM A I N 04A
1 2, 3 1 2, 3 1 2, 3 115
5 20 50 150 125 14 6 12 0 0 650 1200 100 330 10 100 120 15 30 12 25 350 300 2.4 -400 -500 400
20 50 75 250
mV
Main ħAux
CURRENT LIMIT LOAD FAULT POWER INHIBIT PIN VOLTAGE INHIBIT PIN CURRENT ISOLATION CAPACITIVE LOAD INPUT CURRENT RIPPLE
2 7
ILIM PD VE N H VENL
7
% 25 16.8 5 10 1800 Meg 500 22 mA rms 250 45 90 36 75 450 650 0.4 µA dc -750 8 300 900 +800 mS mVdc mVdc Main ħAux Main ħAux kHz kHz V dc ħAux mV rms Main µF Primary to Secondary to Case Main ħAux µA dc W V dc
Overload Enabled Inhibited Enabled Inhibited 500V dc
6
1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1 2, 3 1 2, 3 1 2 ,3
Short Ckt.
IENH IENL RISO CL IRIP
OUTPUT VOLTAGE RIPPLE VRIP
SWITCHING FREQUENCY SYNC. FREQUENCY SYNC. PIN VOLTAGE
8
FSW FS Y N C VHI VLO ISYNH ISYNL TO N V T ON VTLOAD CL=0 CL=0, IMAIN=50100% CL=0, IAUX=50100%
4, 5, 6 4, 5, 6 1, 2, 3 1, 2, 3 4 4 4 1 1
SYNC. PIN CURRENT TURN ON TIME
9
4 0 -800 500
TURN ON OVERSHOOT STEP LOAD TRANSIENT, RESPONSE
750
3
PRELIMINARY Rev. -
5/01
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