IMX35 Series Data Sheet
35 Watt Quad-Output DC-DC Converters
®
Vo [%]
Thermal Considerations
overload short-circuit condition
If a converter, mounted on a PCB, is located in free, quasi-
stationary air (convection cooling) at the indicated maximum
ambient temperature TA max (see table Temperature specifi-
cations) and is operated at its nominal input voltage and output
power, the case temperature TC (TC Z with option Z) measured
at the measuring point of case temperature (see Mechanical
Data) will approach the indicated value TC max after the warm-
up phase. However, the relationship between TA and TC
depends heavily on the conditions of operation and integration
into a system. The thermal conditions are influenced by input
voltage, output current, airflow, temperature of surrounding
components and the surfaces and properties of the printed
circuit board. TA max is therefore only an indicative value, and
under practical operating conditions, the ambient temperature
TA may be higher or lower than this value.
100
switch-off
05041b
70
t
0
0.3 s
Fig. 6
Overload switch off (hiccup mode), typical values.
Series and Parallel Connection
The outputs of one or several double-output power trains may
be connected in series respecting the current limitation.
Caution: The case temperature TC (or TC Z) measured at the
measuring point of case temperature (see Mechanical Data) may
under no circumstances exceed the specified maximum value.
The installer must ensure that under all operating conditions TC (or
TC Z) remains within the limits stated in the table Temperature
specifications.
Both outputs of the same power train can always be
connected in parallel in will behave like a single output.
Several outputs of the same converter with equal output
voltage (e.g. 5 V / 5 V) can be connected in parallel and will
share their output currents almost equally.
The converters provide the specified output power with free air
convection cooling. In the upper temperature range the output
power derating below should be observed.
If outputs of the same converter are being parallel and series-
connected, it is recommended that outputs from the same
power trains are parallel-connected first. This applies for
instance, if 24 V shall be generated by a converter with four
12 V outputs; see fig. 7.
Po/Po max
11047-X35a
JM138
1.0
0.8
IMX35D12D12-9
Vo1+
16
Vi+
4
0.5 m/s
= 100 LFM
0.6
1
5
6
7
8
2
3
PUL
Vo1–
Vo4+
natural cooling
15
17
0.4
0.2
0
Trim
W
PWM
Ref
Vo4–
Vo2+
–24V
+24V
18
13
TA
SD
Vi–
n.c.
20
40
60
80
100
°C
Fig. 5
Maximum allowed output power versus ambient
temperature.
Vo2–
Vo3+
14
12
Overtemperature Protection
Vo3–
11
The converter is protected against possible overheating by
means of an internal temperature monitoring circuit. It shuts
down the converter above the internal temperature limit and
attempts to automatically restart. This feature prevents
excessive internal temperature building up which could occur
under heavy overload conditions.
19 n.c.
Fig. 7
Generating 24 V with an IMX35D12D12-9
Note: Parallel operation of several converters may cause start-
up problems. This becomes noticable in applications, where one
converter is not able to deliver allone the full resistive and
capacitive load current, as it is required in true redundant systems.
Short Circuit Behavior
The current limit characteristic shuts down the converter
whenever a short circuit is applied to an output. It acts self-
protecting and automatically recovers after removal of the
overload condition (hiccup mode).
BCD20009-G Rev AC, 06-May-2013
Page 7 of 15
5秒后页面跳转
PCF8591数据手册解读：参数、引脚说明
一文带你了解ss8050参数、引脚配置、应用指南
深入解析AD7606高性能多通道模数转换器：资料手册参数分析
74HC573三态非易失锁存器(Latch)资料手册参数分析
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，
