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参数资料
| 型号： | TWR-3.3/4-15/250-D12 |
| 元件分类： | 电源模块 |
| 英文描述： | 3-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 文件页数： | 3/9页 |
| 文件大小： | 301K |
| 代理商： | TWR-3.3/4-15/250-D12 |
TWR Models
2 2 W A T T , T R I P L E O U T P U T D C / D C C O N V E R T E R S
3
Performance/Functional Specications
Typical @ TA = +25°C under nominal line voltage, nominal output voltage, natural air convection,
external caps and full-load conditions unless noted.
All models are tested/specied with two external 0.047F output capacitors. These capacitors
are necessary to accommodate our test equipment and may not be required to achieve speci-
ed performance in your applications. All models are stable and regulate within spec under
no-load conditions.
Input Reected Ripple Current is tested/specied over a 20MHz bandwidth. Input ltering is
CIN = 33F, 100V tantalum; CBUS = 220F, 100V electrolytic; LBUS = 12H. See Technical Notes.
For consistent operation, the instantaneous input voltage for full output load must not go below
the low shutdown voltage AT ALL TIMES. Beware of excessive voltage drop from long input
wiring. For reliable startup, be sure to apply input power promptly and fully as a step function.
Mean Time Before Failure is calculated using the Telcordia (Belcore) SR-332 Method 1, Case
3, ground xed conditions, TCASE = +25°C, full load, natural air convection.
The On/Off Control may be driven with external logic or the application of appropriate voltages
(referenced to Common). The On/Off Control input should use either an open collector/open drain
transistor or logic gate which does not exceed +VIN.The On/Off Control may be supplied with with
negative logic (LO = on, HI = off) using the "N" model sufx.
Maximum Power Derating curves indicate an average current at nominal input voltage. At higher
temperatures and/or lower airow, the DC/DC converter will tolerate brief full current outputs if
the total RMS current over time does not exceed the derating curve.
All models are fully operational and meet published specications, including cold start at –40°C.
Output noise may be further reduced by adding an external lter. See I/O Filtering and Noise
Reduction.
The outputs share a common isolated return. The two output sections are not isolated from
each other.
Regulation specications describe the deviation as the line input voltage or output load current
is varied from a nominal midpoint value to either extreme.
Input
Input Voltage Range
See Ordering Guide
Start-Up Threshold:
12V Models
9V minimum, 9.5V typical
24V Models
16.5V minimum, 17V typical
48V Models
34V minimum, 35V typical
Undervoltage Shutdown:
12V Models
8V minimum, 8.5V typical
24V Models
16V minimum, 16.5V typical
48V Models
32.5V minimum, 34.5V typical
Overvoltage Shutdown:
12V Models
20V typical, 21V maximum
24V Models
38V typical, 40V maximum
48V Models
78.5V typical, 81V maximum
Reected (Back) Ripple Current
12mA typical, 20mAp-p maximum
Input Current:
Full Load Conditions
See Ordering Guide
No Load VIN = nominal
12V and 24V Models
25mA typical, 50mA maximum
48V Models
170mA typical, 200mA maximum
Low-Line Voltage (VIN =VMIN, full load) TBD
Remote On/Off Control
Positive Logic (no model sufx)
Off = ground pin to +1.2V maximum
On = open pin to +VIN maximum
Current
2mA maximum
Negative Logic (N model sufx)
On = ground pin to +1.2V maximum
Off = open pin to +VIN maximum
Current
18mA maximum
Output
VOUT Range
See Ordering Guide
VOUT Accuracy:
3.3V or 5V Output
±1% of VNOM
±12V or ±15V Outputs
±10% of VNOM (See Technical Notes)
Temperature Coefcient
±0.02% of VOUT range/°C
Minimum Loading:
See Technical Notes
3.3V or 5V Output
No minimum load
±12V or ±15V Outputs
60mA minimum load
Ripple/Noise (20MHz BW)
See Ordering Guide
Line/Load Regulation
See Ordering Guide & Technical Notes
Efciency
See Ordering Guide
Maximum Capacitive Loading:
3.3V or 5V Output
TBD
±12V or ±15V Outputs
TBD
Isolation:
Input to Output Voltage
1500Vdc minimum
Resistance
100M
Capacitance
470pF
Isolation Safety Rating
Functional insulation
Current Limit Inception: (98% of VOUT)
3.3V Output
5 Amps minimum, 6.2 Amps maximum
5V Output
4 Amps minimum, 5.2 Amps maximum
±12V Outputs
0.36 Amps minimum, 1 Amp maximum
±15V Outputs
0.5 Amps minimum, 1.2 Amps maximum
Short-Circuit Detection:
3.3V or 5V Output
Magnetic feedback
±12V or ±15V Outputs
Magnetic feedback plus voltage clamp
Short-Circuit Potection Method
Current limiting with hiccup autorestore.
Remove overload for recovery.
Short-Circuit Current:
3.3V or 5V Output
2 Amps maximum
±12V or ±15V Outputs
1 Amp maximum
Short Circuit Duration (no damage)
Continuous, output shorted to ground
Overvoltage Protection:
3.3V or 5V Output
3.8Vdc minimum, 4.2Vdc maximum
±12V or ±15V Outputs
30Vdc maximum
Method: magnetic feedback
Dynamic Characteristics
Dynamic Load Response (50-100% loadstep)
3.3V or 5V Output
150sec to ±1.5% of nal value
±12V or ±15V Outputs
150sec to ±10% of nal value
Start-Up Time
VIN to VOUT regulated
TBD msec for VOUT = nominal
Switching Frequency
330kHz ±20kHz
Environmental
Calculated MTBF
TBD
Operating Temperature: (Ambient)
No Derating (Natural convection)
–40 to +65°C
With Derating
See Derating Curves
Operating Case Temperature
–40 to +100°C maximum
Storage Temperature
–40 to +120°C
Thermal Protection/Shutdown
+110°C minimum to 120°C maximum
Density Altitude
0 to 10,000 feet
Relative Humidity
10% to 90%, non-condensing
Physical
Dimensions
See Mechanical Specications
Case and Header Material
Black Diallyl Phthalate plastic
Pin Dimensions/Material
0.04"(1.016mm) dia. solder-coated brass
Weight
TBD
Electromagnetic Interference
TBD
Safety
UL/cUL 60950 CSA-C22.2 No.234
IEC/EN 60950
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