QCH28512T Просмотр технического описания (PDF) - M.S. Kennedy
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QCH28512T Datasheet PDF : 7 Pages
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QCH28512T/RCH28512T
SPECIFICATIONS
Unless noted: –55°C ≤ TCASE ≤ 125°C, 16Vdc ≤ VIN ≤ 40Vdc, PMAIN = 20W, P+AUX = P-AUX = 5W.
PARAMETER
SYMBOL
TEST
CONDITIONS
GROUP A12
SUBGROUP MIN TYPICAL
MAX
UNITS
COMMENT
STEP LOAD TRANSIENT10
RECOVERY
TRLOAD
CL=0
4
4
0.05 0.10
mS
3
5
Main
±Aux
STEP LINE TRANSIENT,
RESPONSE
VTLINE
STEP LINE TRANSIENT10
RECOVERY
TRLINE
CL=0
4
4
CL=0
4
4
150
250
100
250
mVdc
Main
±Aux
0.05 0.10
mS
3
5
Main
±Aux
LOAD FAULT TRANSIENT, VTFLT
RESPONSE
CL=0
4
4
0
300
mVdc Main
900
±Aux
LOAD FAULT TRANSIENT10, TRFLT
RESPONSE
CL=0
4
4
40
100
mS
Main
TBD
±Aux
INHIBIT DELAY11
TDINH
CL=0
4
4
0.1
0.2
mS
TBD
Main
±Aux
INHIBIT RECOVERY9
TRINH
CL=0
4
4
4
8
mS
Main
TBD
±Aux
NOTES: 1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
Under Voltage Lock Out (UVLO) is approx. 10.5-13.5 Vdc.
Vin = 28±1 V dc. Nominal output power: PMAIN = 20W, P+AUX = 5W, P-AUX = 5W.
Full power output must be equal to or less than 30 watts. Short duration Aux current is 2A peak.
Over-Voltage Protection (OVP) guaranteed by design not to exceed 6V dc on main output under any static condition at room
temperature. On models with OVP option, only. Therefore this parameter is limited to <5.5V on these models.
Short Term Over-Load (STOL).
Continuous overload. Auxiliary outputs are protected with thermal shutdown.
Internal Pull-Up typically 22k ohms to VIN. For 80-volt transients, input device must be able to sink at least 3.5 mA.
Internal Pull-Up approximately 22k ohms to typically 12V. This is an open collector, TTL compatible, edge triggered active low
input. A valid low must exist for 20% to 80% duty ratio. The converter takes approximately 2 mS to synchronize. For "TTL
Sync" option VMAX ≤ 55V.
Time for outputs to reach 90% of final value. Measured from valid Inhibit High VENH or valid VIN.
Measured from start of transient to response within 90% of final value.
Time for outputs to reach 50% of initial value. Measured from valid Inhibit Low VENL or VIN below UVLO.
As per MIL-PRF-38534.
4
PRELIMINARY Rev. - 6/01
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