H100-24S24 application notes


Applications
Switches and Data Storage
H100-24S24 DC/DC Converter •• Servers,
Wireless Communications
1400 PROVIDENCE HIGHWAY • BUILDING 2
•
Distributed
Power Architecture
Application Notes
NORWOOD, MASSACHUSETTS 02062-5015
• Semiconductor Test Equipment
WWW.INTRONICS.COM
• Networking Gear
• Data Communications
• Telecommunications
• Industrial / Medical
Basic operation and functions
H100 single output DC/DC converters
provide from 50 watts up to 100 watts of
output power in an industry standard
half-brick package and footprint. The H100
features high efficiency, fixed switching
frequency at 500 KHz, continuous short
circuit protection, over voltage protection,
over current protection, over temperature
protect, five-sided metal case, True-Trim
Option, 1500V Isolation, and Positive or
Negative Logic. Therefore, H100 converters
are particularly suited to telecom, networking,
and industrial application.
Input (Vi+ , Vi-)
Input power Vin+ must be connected to
Positive input voltage(Vi+) ; Input power
Logic State
Negative
Logic
Module on
Logic LowSwitch
Closed
Logic High- Module off
Switch
Closed
Positive
Logic
Module off
Module on
Remote Sense(+sense , -sense)
Permits the user to maintain the accurate
output voltage at the remote load trminals
regardless of the line drop.
The +sense and -sense should be connected
at the load or at the point where the
regulation is needed.
Vin- must be connected to Negative
voltage(Vi-).
Output (Vo+ , Vo- )
Output power Vout+ must be connected to
Positive output voltage (Vo+) ; Output power
Vout- must be Negative output voltage (Vo-).
On /Off
The output allows the user to switch the
module on and off electronically by remote
on/off feature. There are two remote control
options available, Positive logic and
Negative logic. The remote must use the TTL
to control on/off pin.
The remote sense feature of the unit
compensates for voltage drop occurring
between the output pins of the unit and load.
The +sense and -sense should be connected
at the load or at the point where regulation is
required.
If remote sense is not required, the +sense
pin muse be connected to the Vout+ pin and
-sense pin must be connected to the Vout- pin
to ensure the unit will regulate at the
specified output voltage. If these connections
are not made, the unit's output voltage will be
higher than the specified value.
1
Intronics, Inc.
•
1400 Providence Highway, Building 2, Norwood, MA 02062-5015 Phone:
•
1-800-367-0004, 1-781-551-5500 Fax: 1-781-551-5555
Rev. A

Applications
Switches and Data Storage
H100-24S24 DC/DC Converter •• Servers,
Wireless Communications
1400 PROVIDENCE HIGHWAY • BUILDING 2
•
Distributed
Power Architecture
Application Notes
NORWOOD, MASSACHUSETTS 02062-5015
• Semiconductor Test Equipment
WWW.INTRONICS.COM
• Networking Gear
• Data Communications
• Telecommunications
• Industrial / Medical
The unit output over voltage protection
senses the voltage across Vout+ and Vout-,
When using the remote sense feature, the
output voltage at the unit can be increased by
as much as 10% above the normal rating, in
order to maintain the required voltage across
the load. Therefore, the designer must
consider this condition.
Also when using the remote senses function,
the output power must be taken care of, as
not to exceed the maximum power capability
of the unit.
Output voltage trim(trim)
Permits the user to adjust the output voltage
up or down to achieve the custom voltage or
to make the output voltage margining. The
adjustment range is from +10% to -10%.
Output voltage can be adjusted up or down,
by connecting the Rtrim-up or Rtrim-down
resistor as show. Rtrim-up makes the output
voltage go up to 10%; and the Rtrim-down
makes the output voltage go down to 10%.
Leave Trim pin open for normal output
voltage.
Trimming up the output voltage for a typical
circuit
For Trim up resistance value, we list the
reference "Trim UP Resistance" for
increasing the output voltage for every 1
percent.
Rtrim-up(K) Vout(V)
Trim-up
Vout(%)
68.54
24.24
1%
49.36
24.48
2%
37.95
24.72
3%
30.39
24.96
4%
25.00
25.20
5%
20.97
25.44
6%
17.84
25.68
7%
15.35
25.92
8%
13.31
26.16
9%
11.61
26.40
10%
shows "Trim UP Resistance" value chart.
70
60
Rtrim-up(KΩ)
and not across the sense lines, so the
resistance between the output pins of the unit
and the load should be minimized to prevent
unwanted triggering of the OVP.
50
40
30
20
10
0
0%
1%
2%
3%
4% 5% 6% 7%
Trim-up Vout(%)
8%
9% 10%
Trimming down the output voltage for a
typical circuit
For Trim up resistance value, we list the
2
Intronics, Inc.
•
1400 Providence Highway, Building 2, Norwood, MA 02062-5015 Phone:
•
1-800-367-0004, 1-781-551-5500 Fax: 1-781-551-5555
Rev. A

Applications
Switches and Data Storage
H100-24S24 DC/DC Converter •• Servers,
Wireless Communications
1400 PROVIDENCE HIGHWAY • BUILDING 2
•
Distributed
Power Architecture
Application Notes
NORWOOD, MASSACHUSETTS 02062-5015
• Semiconductor Test Equipment
WWW.INTRONICS.COM
For Trim down resistance value, we list the
reference "Trim Down Resistance" for
decreasing the output voltage for every 1
percent.
Rtrim-down(K) Vout(V) Trim-down
Vout(%)
1671.67
23.76
1%
775.83
23.52
2%
477.22
23.28
3%
327.92
23.04
4%
238.33
22.80
5%
178.61
22.56
6%
135.95
22.32
7%
103.96
22.08
8%
79.07
21.84
9%
59.17
21.60
10%
• Networking Gear
• Data Communications
• Telecommunications
• Industrial / Medical
Output over current protection (OCP) and
output short protection
The unit will auto recovery current limit
when the over current or short circuit
condition exists.
Once the OCP happens, the unit has auto
recovery current limit. The attempted restart
will continue indefinitely until the over
current or short circuit condition is removed.
When OCP happens, the output voltage drops
below 0.2V.
Input voltage has almost no effect on the
current limit point.
shows "Trim Down Resistance" value chart.
1800
1600
Rtrim-down(KΩ)
1400
1200
1000
800
600
400
200
0
0%
1% 2%
3%
4%
5% 6%
7%
8%
9% 10%
CH1:24Vout/OCP
Trim-down Vout(%)
Protection Features
Input under voltage lockout(UVLO)
Input under voltage lockout(UVLO) is
standard with the H100 unit. The unit will
shut down when the input voltage drops
below a threshold, and the unit will turn on
when the input voltage goes to the upper
threshold.
The hysteresis voltage of the unit voltage
protection is 1V, typically from the 16V to
CH1:24Vout/short
17V range.
3
Intronics, Inc.
•
1400 Providence Highway, Building 2, Norwood, MA 02062-5015 Phone:
•
1-800-367-0004, 1-781-551-5500 Fax: 1-781-551-5555
Rev. A

Applications
Switches and Data Storage
H100-24S24 DC/DC Converter •• Servers,
Wireless Communications
1400 PROVIDENCE HIGHWAY • BUILDING 2
•
Distributed
Power Architecture
Application Notes
NORWOOD, MASSACHUSETTS 02062-5015
• Semiconductor Test Equipment
WWW.INTRONICS.COM
Output over voltage protection(OVP)
The output over voltage protection range
rating.
above 115-140% Vout. If the output voltage
exceeds 140%Vout, the output will keep
140%Vout.
Efficiency
Efficiency vs load current is given below.
The ambient temperature is 25℃, airflow is
• Networking Gear
• Data Communications
• Telecommunications
• Industrial / Medical
20LFM(0.1m/s), and the input voltage is 18V,
protect the unit from overheating. The OTP
circuit will turn the unit off when OTP
happens. Once the unit has shut down, it will
24V and 36V conditions.
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
restart at the cycle when the case plate
temperature goes down.
Characterization
General information
The H100 unit has many operational
characterized aspects, including efficiency,
start up and down timing parameter,
H100-24S24 EFF.
Eff.
CHB100-24S24
EFF.(%)
Over temperature protection(OTP)
The unit will shut down when the case plate
temperature exceeds the protection threshold.
The unit will shut down under the case plate
temperature over a 100℃ condition to
18V
24V
36V
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5
Iout(A)
Start up
During the turn on transient using the On/Off
pin and power supply for full load current,
the output voltage waveforms are given in
the below.
overshoot, output ripple & noise, dynamic
response to load , input ripple current and
thermal derating.
The following pages contain specific plots or
waveforms associated with the unit.
Additional comments for specific data are
provided below.
Test conditions:
For the output, a 10uF tantalum capacitor
with Esr < 1.5Ω and a 1uF ceramic capacitor
has been used for the test.
Also it is better when these two capacitors
CH1:24Vin H2:24Vout/FL
Start up delay time: 5.2ms
are close to the unit.
Note: It is important to make sure that the
components on the unit do not exceed their
4
Intronics, Inc.
•
1400 Providence Highway, Building 2, Norwood, MA 02062-5015 Phone:
•
1-800-367-0004, 1-781-551-5500 Fax: 1-781-551-5555
Rev. A

Applications
Switches and Data Storage
H100-24S24 DC/DC Converter •• Servers,
Wireless Communications
1400 PROVIDENCE HIGHWAY • BUILDING 2
•
Distributed
Power Architecture
Application Notes
NORWOOD, MASSACHUSETTS 02062-5015
• Semiconductor Test Equipment
WWW.INTRONICS.COM
• Networking Gear
• Data Communications
• Telecommunications
• Industrial / Medical
Output Ripple and Noise
The output voltage waveform measured at
minimum load and full load current, with a
0.1uF ceramic capacitor across to close unit.
CH1: Remote CH2: 24Vout/FL
Start up delay time: 3.58ms
Overshoot and rise time
The input start-up from power supply. The
output voltage waveform measured at
CH1: 24Vout/FL
minimum load and full load current.
Ripple: 60.4mVp-p
Hold time
The hold time is measure from the power
supply end or on/off pin is off to when Vout
drop down to 90% output.
CH1: 24Vout/FL
Overshoot: zero % Rise time: 1.524ms
CH1:24Vin Ch2: 24Vout/FL
Hold time:60us
CH1:24Vout/NL
Overshoot: zero % Rise time:2.177ms
5
Intronics, Inc.
•
1400 Providence Highway, Building 2, Norwood, MA 02062-5015 Phone:
•
1-800-367-0004, 1-781-551-5500 Fax: 1-781-551-5555
Rev. A

Applications
Switches and Data Storage
H100-24S24 DC/DC Converter •• Servers,
Wireless Communications
1400 PROVIDENCE HIGHWAY • BUILDING 2
•
Distributed
Power Architecture
Application Notes
NORWOOD, MASSACHUSETTS 02062-5015
• Semiconductor Test Equipment
WWW.INTRONICS.COM
CH1:Remote Ch2: 24Vout/FL
CH1:24Vout Ch2:Iout, 0.1A/us
Hold time:2.56ms
Load change 25%-75%-25%
• Networking Gear
• Data Communications
• Telecommunications
• Industrial / Medical
Dynamic response
Output voltage dynamic response at 24Vin and
different load condition.
ceramic
capacitor.
Output with a 0.1uF
Derating Curve
When operating the H100 series proper
derating or cooling is needed.
Following is the derating curve of H100
without heatsink.
Where:
The power dissipation(Pd)
Pd = Pi – Po = Po(1-eff.) / eff.
The thermal resistance are list below:
The temperature rise(△T):
CH1:24Vout Ch2:Iout, 0.1A/us
Load change 50%-100%-50%
△Pd*Rca
50
100LFM(0.5m/s)
Power Disspated(W)
45
200LFM(1m/s)
40
35
300LFM(1.5m/s)
30
400LFM(2m/s)
25
20
500LFM(2.5m/s)
15
600LFM(3m/s)
10
700LFM(3.5m/s)
5
800LFM(4m/s)
0
0
20
40
60
80
100
20LFM(0.1m/s)
Ambient Temperature(℃ )
Intronics, Inc.
•
1400 Providence Highway, Building 2, Norwood, MA 02062-5015 Phone:
6
•
1-800-367-0004, 1-781-551-5500 Fax: 1-781-551-5555
Rev. A

Applications
Switches and Data Storage
H100-24S24 DC/DC Converter •• Servers,
Wireless Communications
1400 PROVIDENCE HIGHWAY • BUILDING 2
•
Distributed
Power Architecture
Application Notes
NORWOOD, MASSACHUSETTS 02062-5015
• Semiconductor Test Equipment
WWW.INTRONICS.COM
• Networking Gear
• Data Communications
• Telecommunications
• Industrial / Medical
Input ripple current
CH1: Iin / Output: FL
Input ripple current: 244mAp-p
Chart of Thermal Resistance vs Airflow
Air Flow Rate
Typical Rca
20LFM (0.1m/s)
7.12℃/W
100LFM (0.5m/s)
6.21℃/W
200LFM (1.0m/s)
5.17℃/W
300LFM (1.5m/s)
4.29℃/W
400LFM (2.0m/s)
3.64℃/W
500LFM (2.5m/s)
2.96℃/W
600LFM (3.0m/s)
2.53℃/W
700LFM (3.5m/s)
2.37℃/W
800LFM (4.0m/s)
2.19℃/W
*. Natural convection = 20LFM (0.1m/s)
7
Intronics, Inc.
•
1400 Providence Highway, Building 2, Norwood, MA 02062-5015 Phone:
•
1-800-367-0004, 1-781-551-5500 Fax: 1-781-551-5555
Rev. A