Crane Aerospace & Electronics Power Solutions
MHF+ Single, Dual and Triple DC/DC Converters
28 VOLT INPUT – 15 WATT
FEATURES
• –55° to +125°C operation
• 16 to 40 VDC input (16 to 48 VDC triple)
• Fully isolated
• Optocoupler feedback
• Fixed frequency 550 kHz typical
- 450 kHz triple models
• Topology
- Single and dual: Single Ended Forward
- Triple: Current Mode Flyback
• Transient protection
MODELS
- Single and dual: 50 V/50 ms
- Triple: 80 V/120 ms
VDC OUTPUT
SINGLE
3.3
5
DUAL
5
TRIPLE
+5 & 12
+5 & 15
• Inhibit and sync functions
• Indefinite short circuit protection
• Undervoltage lockout
12
5.2
12
15
3
• Up to 84% efficiency, 28 W/in
15
-
Up to 76% efficiency triple models
28
MHF+ SERIES™ SINGLE & DUAL
DC/DC CONVERTERS
The MHF+ Single and Dual Series™ of high frequency DC/DC
converters offers a wide input voltage range of 16 to 40 volts and up
to 15 watts of output power. The units are capable of withstanding
short term transients up to 50 volts. The package is a hermetically
sealed, welded metal case. Flanged and non-flanged models are
available.
HIGHER POWER DENSITY
The MHF+ Series offers a new standard of performance for small
size and high power density. At just 0.33 inch high and a total foot-
2,
print of 1.7 in this low profile package offers a total power density
of up to 28 watts per cubic inch.
LOW NOISE, HIGH AUDIO REJECTION
CONVERTER DESIGN
The MHF+ converters’ feed-forward compensation system provides
excellent dynamic response and noise rejection. Audio rejection is
typically 50 dB. Typical output voltage response for a 50% to 100%
step load transient is as low as 1.3% with a 150 msec recovery time.
Input ripple current is typically 35 mA p-p with output ripple voltage
typically 30 mV p-p .
The MHF+ converters are switching regulators that use a quasi-
square wave, single-ended forward converter design with a constant
switching frequency of 550 kHz. Isolation between input and output
circuits is provided with a transformer in the forward path and a
temperature compensated optical link in the feedback control loop.
For the MHF+ dual output models, good cross regulation is main-
tained by tightly coupled output magnetics. Up to 90% of the total
output power (80% on 2805D) is available from either output,
providing the opposite output is simultaneously carrying 10% of the
total output power (20% on 2805D models). Predictable current limit
is accomplished by directly monitoring the output load current and
providing a constant current output above the overload point.
INHIBIT FUNCTION
MHF+ converters provide an inhibit terminal that can be used to
disable internal switching, resulting in no output and very low quies-
cent input current. The converter is inhibited when a TTL compatible
low (≤0.8 – output disabled) is applied to the inhibit pin. The unit is
enabled when the pin, which is internally connected to a pull-up
resistor, is left unconnected or is connected to an open-collector
gate. The open circuit output voltage associated with the inhibit pin
is 8.5 to 12 V. In the inhibit mode, a maximum of 4 mA must be sunk
from the inhibit pin.
Crane Aerospace & Electronics
Page 1 of 20
Rev K - 20060613
Electronics Group (Interpoint Brand)
PO Box 97005 • Redmond WA 98073-9705
425.882.3100 • electronics@craneae.com
www.craneae.com
5秒后页面跳转
NTC热敏电阻与PTC热敏电阻的应用原理及应用范围
GTO与普通晶闸管相比为什么可以自关断？为什么普通晶闸管不能呢？从GTO原理、应用范围带你了解原因及推荐型号
LF353数据手册解读：特性、应用、封装、引脚说明、电气参数及替换型号推荐
A4950资料手册解读：特性、应用、封装、引脚功能、电气参数及代换型号
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
技术参数
数据手册
如果您发现信息不准确，
