ECLB60W 49.5-60 Watt Isolated DC-DC Converters
Application Note V12 November 2018
8
5. Main Features and Functions
5.1 Operating Temperature Range
The ECLB60W series converters can be operated by a
wide ambient temperature range from -40 to ℃85℃
(de-rating above 45℃). The standard model has a
copper case and case temperature can not over 105℃
at normal operating.
5.2 Remote On/Off
The remote on/off input feature of the converter allows
external circuitry to turn the converter on or off.
Active-high remote on/off is available as standard. The
converter is turned on if the remote on/off pin is high
(>3.5Vdc to 75 or open circuit). Setting the pin low (0 to
<1.2Vdc) will turn the converter ‘off’. The signal level of
the remote on/off input is defined with respect to “-Vin”. If
not using the remote on/off pin, leave the pin open
(module will be on).
5.3 UVLO (Under Voltage Lock Out)
Input under voltage lockout is standard on the ECLB60W
unit. The unit will shut down when the input voltage
drops below a threshold, and the unit will operate when
the input voltage goes above the upper threshold.
5.4 Over Current Protection
All models have internal over current and continuous
short circuit protection. The unit operates normally once
the fault condition is removed. At the point of current limit
inception, the converter will go into hiccup mode
protection.
5.5 Over Voltage Protection
The over-voltage protection consists of a zener diode to
limiting the out voltage.
5.6 Over-Temperature Protection (OTP)
The ECLB60W series converters are equipped with
non-latching over-temperature protection. If the
temperature exceeds a threshold of 110°C (typical) the
converter will shut down, disabling the output. When the
temperature has decreased the converter will
automatically restart. The over-temperature condition
can be induced by a variety of reasons such as external
overload condition or a system fan failure.
5.7 Output Voltage Adjustment
Section 6.7 describes in detail how to trim the output
voltage with respect to its set point. The output voltage
on all models is adjustable within the range of +10%
to –10%. (Single output models only)
6. Applications
6.1 Recommended Layout PCB Footprints
and Soldering Information
The system designer or the end user must ensure that
other components and metal in the vicinity of the
converter meet the spacing requirements to which the
system is approved. Low resistance and low inductance
PCB layout traces are the norm and should be used
where possible. Due consideration must also be given to
proper low impedance tracks between power module,
input and output grounds. The recommended footprints
and soldering profiles are shown below.
Note: Dimensions are in inches (millimeters)
Le a d Fre e Wa ve S olde ring P rofile
0
50
100
150
200
250
300
0 5 0 1 0 0 1 5 0
Tim e (S e c onds )
Te mpe ra ture ( C )
Note:
1. Soldering Materials: Sn/Cu/Ni
2. Ramp up rate during preheat: 1.4 ℃/Sec (From 50℃
to 100℃)
3. Soaking temperature: 0.5 ℃/Sec (From 100℃ to
130℃), 60±20 seconds
4. Peak temperature: 260℃, above 250℃ 3~6 Seconds
5. Ramp up rate during cooling: -10.0 ℃/Sec (From
260℃ to 150℃)