Delta Electronics Delphi IPM24S0B0 User manual

Delphi Series IPM24S0B0, Non-Isolated,
Integrated Point-of-Load Power Modules:
11V~36V input, 3.3~6.5V and 3A Output
The Delphi Series IPM24S0B0 non-isolated, fully integrated
Point-of-Load (POL) power modules, are the latest offerings from a
world leader in power systems technology and manufacturing --
Delta Electronics, Inc. This product family provides up to 3A of
output current or 20W of output power in an industry standard,
compact, IC-like, molded package. It is highly integrated and does
not require external components to provide the point-of-load
function. A copper pad on the back of the module; in close contact
with the internal heat dissipation components; provides excellent
thermal performance. The assembly process of the modules is fully
automated with no manual assembly involved. These converters
possess outstanding electrical and thermal performance, as well as
extremely high reliability under highly stressful operating conditions.
IPM24S0B0 operates from an 11V~36V source and provides a
programmable output voltage from 3.3V to 6.5V. The IPM product
family is available in both a SMD or SIP package. IPM24S family is
also available for output 1.2V~2.5V. Please refer to IPM240A0
datasheet for details.
OPTIONS
 SMD or SIP package
APPLICATIONS
 Telecom/DataCom
 Wireless Networks
 Optical Network Equipment
 Server and Data Storage
 Industrial/Test Equipment
FEATURES
 High efficiency: 91% @ 12Vin, 6.5V/3A
88%@24Vin,6.5V/3A
 Small size and low profile:
17.8x15.0x7.8mm (0.70”x0.59”x0.31”)
 Output voltage adjustment: 3.3V~6.5V
 Monotonic startup into normal and
pre-biased loads
 Input UVLO, output OCP
 Remote ON/OFF
 Output short circuit protection
 Fixed frequency operation
 Copper pad to provide excellent thermal
performance
 ISO 9001, TL 9000, ISO 14001, QS9000,
OHSAS18001 certified manufacturing
facility
 UL/cUL 60950 (US & Canada) Recognized,
and TUV (EN60950) Certified
 CE mark meets 73/23/EEC and
93/68/EEC directives
DATASHEET
IPM24S0B0S/R03_03202007

DS_IPM24S0B0_03202007
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TECHNICAL SPECIFICATIONS
TA = 25°C, airflow rate = 300 LFM, Vin = 24Vdc, nominal Vout unless otherwise noted.
PARAMETER NOTES and CONDITIONS IPM24S0B0R/S03FA
Min. Typ. Max. Units
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous) 0 40 Vdc
Operating Temperature Please refer to Fig.32 for the measuring point -40 +125 °C
Storage Temperature -55 +125 °C
INPUT CHARACTERISTICS
Operating Input Voltage 11 36 V
Input Under-Voltage Lockout
Turn-On Voltage Threshold 10.31 V
Turn-Off Voltage Threshold 10.10 V
Maximum Input Current Vin=Vin,min to Vin,max, Io=Io,max 2.5 A
No-Load Input Current 50 mA
Off Converter Input Current 3 10 m
A
Input Reflected-Ripple Current P-P 0.5µH inductor, 5Hz to 20MHz 60 150 mAp-p
Input Voltage Ripple Rejection 120 Hz TBD dB
OUTPUT CHARACTERISTICS
Output Voltage Set Point Vin=24V, Io=Io,max, Ta=25℃3.251 3.3 3.350 Vdc
Output Voltage Adjustable Range 3.3 6.5 V
Output Voltage Regulation
Over Line Vin=Vin,min to Vin,max 0.3 % Vo,set
Over Load Io=Io,min to Io,max 0.3 % Vo,set
Over Temperature Ta=Ta,min to Ta,max 0.01 0.025 %Vo,set
/
℃
Total Output Voltage Range Over sample load, line and temperature -3.0 +3.0 % Vo,set
Output Voltage Ripple and Noise 5Hz to 20MHz bandwidth
Peak-to-Peak Full Load, 1µF ceramic, 220µF Poscap 50 100 mVp-p
RMS Full Load, 1µF ceramic, 220µF Poscap 25 50 mV
Output Current Range Vo>3.3Vdc 0 3 A
Output Voltage Over-shoot at Start-up Vin=11V to 36V, Io=0A to 3
A
, Ta=25℃0 1 % Vo,set
Output DC Current-Limit Inception 200 % Io
DYNAMIC CHARACTERISTICS
Dynamic Load Response 220µF Poscap & 1µF Ceramic load cap, 0.5A/µs
Positive Step Change in Output Current 50% Io, max to 100% Io, max 75 200 mVpk
Negative Step Change in Output Current 100% Io, max to 50% Io, max 75 200 mVpk
Setting Time to 10% of Peak Devitation 200 300 µs
Turn-On Transient Io=Io.max
Start-Up Time, From On/Off Control 17 50 ms
Start-Up Time, From Input 17 50 ms
Output Voltage Rise Time Time for Vo to rise from 10% to 90% of Vo,set, 5 9 17 ms
Maximum Output Startup Capacitive Load Full load; ESR ≧25mΩ220 µF
Full load; ESR ≧18mΩ1220 µF
EFFICIENCY
Vo=3.3V Vin=12V, Io=Io,max, Ta=25℃85.0 86.5 %
Vo=4.0V Vin=12V, Io=Io,max, Ta=25℃86.5 88.0. %
Vo=5.0V Vin=12V, Io=Io,max, Ta=25℃88.5 89.5 %
Vo=6.5V Vin=12V, Io=Io,max, Ta=25℃90.0 91.0 %
Vo=3.3V Vin=24V, Io=Io,max, Ta=25℃81.0 82.5 %
Vo=4.0V Vin=24V, Io=Io,max, Ta=25℃83.0 84.5 %
Vo=5.0V Vin=24V, Io=Io,max, Ta=25℃85.0 86.0 %
Vo=6.5V Vin=24V, Io=Io,max, Ta=25℃87.0 88.0 %
FEATURE CHARACTERISTICS
Switching Frequency 300 kHz
ON/OFF Control, (Logic High-Module ON)
Logic High Module On 2.4 Vin,max V
Logic Low Module Off -0.2 0.8 V
ON/OFF Current Ion/off at Von/off=0 0.25 1 mA
Leakage Current Logic High, Von/off=5V 50 µA
GENERAL SPECIFICATIONS
Calculated MTBF Io=80% Io,max, Ta=25℃13.74 M hours
Weight 6 grams

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ELECTRICAL CHARACTERISTICS CURVES
Figure 1: Converter efficiency vs. output current
(3.30V output voltage)
Figure 2: Converter efficiency vs. output current
(4.0V output voltage)
Figure 3: Converter efficiency vs. output current
(5.0V output voltage)
Figure 4: Converter efficiency vs. output current
(6.5V output voltage)
Figure 5: Output ripple & noise at 12Vin, 3.3V/3A out
Figure 6: Output ripple & noise at 24Vin, 3.3V/3A out
54.0
59.0
64.0
69.0
74.0
79.0
84.0
89.0
0.0 0.5 1.0 1.5 2.0 2.5 3.0
Iout (A)
Efficiency%
Vin=11V
Vin=12V
Vin=24V
Vin=36V
54.0
58.0
62.0
66.0
70.0
74.0
78.0
82.0
86.0
90.0
0.0 0.5 1.0 1.5 2.0 2.5 3.0
Iout (A)
Efficiency%
Vin=11V
Vin=12V
Vin=24V
Vin=36V
63.0
67.0
71.0
75.0
79.0
83.0
87.0
91.0
95.0
0.00.51.01.52.02.53.0
Iout (A)
Efficiency%
Vin=11V
Vin=12V
Vin=24V
Vin=36V
60.0
64.0
68.0
72.0
76.0
80.0
84.0
88.0
92.0
0.0 0.5 1.0 1.5 2.0 2.5 3.0
Iout (A)
Efficiency%
Vin=11V
Vin=12V
Vin=24V
Vin=36V

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ELECTRICAL CHARACTERISTICS CURVES
Figure 7: Output ripple & noise at 12Vin, 4.0V/3A out Figure 8: Output ripple & noise at 24Vin, 4.0V/3A out
Figure 9: Output ripple & noise at 12Vin, 5.0V/3A out
Figure 10: Output ripple & noise at 24Vin, 5.0V/3A out
Figure 11: Output ripple & noise at 12Vin, 6.5V/3A out
Figure 12: Output ripple & noise at 24Vin, 6.5V/3A out

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ELECTRICAL CHARACTERISTICS CURVES
Figure 13: Power on waveform at 12vin, 3.3V/3A out with
application of Vin
Figure 14: Power on waveform at 12vin, 6.5V/3A out with
application of Vin
Figure 15: Power off waveform at 12vin, 3.3V/3A out with
application of Vin Figure 16: Power off waveform 12vin,6.5V/3A out with application of Vin
Figure 17: Remote turn on delay time at 24vin, 6.5V/3A out Figure 18: Remote turn on delay time at 24vin, 6.5V/3A out

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ELECTRICAL CHARACTERISTICS CURVES
Figure 19: Turn on delay at 24vin, 3.3V/3A out with
application of Vin
Figure 20: Turn on delay at 24vin, 6.5V/3A out with
application of Vin
Figure 21: Typical transient response to step load change at
0.5A/µS from 100% to 50% of Io, max at 12Vin,
6.5V out (measurement with a 1uF ceramic
Figure 22: Typical transient response to step load change at
0.5A/µS from 50% to 100% of Io, max at 24Vin,
6.5V out (measurement with a 1uF ceramic)

DS_IPM24S0
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B0_03202007
TEST CONFIGURATIONS
V I (+)
V
I (-)
BATTERY 2100uF
Electrolytic
L
TO OSCILLOSCOPE
Ceramic
3.3uF
Note: Input reflected-ripple current is measured with a
simulated source inductance. Current is
measured at the input of the module.
Figure 23: Input reflected-ripple current test setup
Vo
GND
COPPER STRIP
220uF
PosCap 1uF ceramic SCOPE Resistive
Load
Note: Use a 220µF PosCap and 1µF capacitor. Scope
measurement should be made using a BNC
connector.
Figure 24: Peak-peak output noise and startup transient
measurement test setup
SUPPLY
I
I
V I Vo
GND
Io
LOAD
CONTACT AND
DISTRIBUTION LOSSES
CONTACT RESISTANCE
Figure 25: Output voltage and efficiency measurement test
setup
Note: All measurements are taken at the module
terminals. When the module is not soldered (via
socket), place Kelvin connections at module
terminals to avoid measurement errors due to
contact resistance.
%100)( ×
×
×
=IiVi IoVo
η
DESIGN CONSIDERATIONS
Input Source Impedance
To maintain low-noise and ripple at the input voltage, it is
critical to use low ESR capacitors at the input to the
module. Figure 26 shows the input ripple voltage
(mVp-p) for various output models using 2x100uF low
ESR electrolytic capacitors (Rubycon P/N:50YXG100,
100uF/50V or equivalent) and 1x3.3.0 uF very low ESR
ceramic capacitors (TDK P/N: C4532JB1H335M,
3.3uF/50V or equivalent).
The input capacitance should be able to handle an AC
ripple current of at least:
Arms
Vin
Vout
Vin
Vout
IoutIrms ⎟
⎠
⎞
⎜
⎝
⎛−= 1
Figure 26: Input ripple voltage for various output models,
Io = 3A (Cin =2x100uF electrolytic capacitors
1x3.3uF ceramic capacitors at the input)
The power module should be connected to a low
ac-impedance input source. Highly inductive source
impedances can affect the stability of the module. An
input capacitance must be placed close to the modules
input pins to filter ripple current and ensure module
stability in the presence of inductive traces that supply
the input voltage to the module.

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DESIGN CONSIDERATIONS
Remote On/Off
The IPM series power modules have an On/Off control
pin for output voltage remote On/Off operation. The
On/Off pin is an open collector/drain logic input signal
that is referenced to ground. When On/Off control pin is
not used, leave the pin unconnected.
The remote on/off pin is internally connected to +5Vdc
through an internal pull-up resistor. Figure 27 shows the
circuit configuration for applying the remote on/off pin.
The module will execute a soft start ON when the
transistor Q1 is in the off state.
The typical rise for this remote on/off pin at the output
voltage of 2.5V and 5.0V are shown in Figure 17 and 18.
Vo
On/Off
Vin
GND
IPM
Q1
RL
Figure 27: Remote on/off implementation
FEATURES DESCRIPTIONS
Over-Current Protection
To provide protection in an output over load fault
condition, the unit is equipped with internal over-current
protection. When the over-current protection is
triggered, the unit enters hiccup mode. The units
operate normally once the fault condition is removed.
OutputVoltageProgramming
The output voltage shall be externally adjustable by use
of a Trim pin. The module output shall be adjusted by
either a voltage source referenced to ground or an
external resistor be connected between trim pin and Vo or
ground. To trim-down using an external resistor, connect
a resistor between the Trim and Vo pin of the module. To
trim-up using an external resistor, connect a resistor
between the Trim and ground pin of the module. The
value of resistor is defined below. The module outputs
shall not be adversely affected (regulation and operation)
when the Trim pin is left open.
Trim up
(Vout-0.7)*1.43
Rtrim = Vadj-Vout (KΩ)
Trim Down
(Vadj-0.7)*5.36
Rtrim = Vout-Vadj (KΩ)
Rtrim is the external resistor in KΩ
Vout is the desired output voltage
IPM can also be programmed by applying a voltage
between the TRIM and GND pins (Figure 30). The
following equation can be used to determine the value of
Vtrim needed for a desired output voltage Vo:

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FEATURES DESCRIPTIONS (CON.)
Figure 28: Trim up Circuit configuration for programming
output voltage using an external resistor
Rtrim Load
Vout
Trim
GND
Figure 29: Trim down Circuit configuration for programming
output voltage using an external resistor
Figure 30: Circuit configuration for programming output voltage
using external voltage source
Table 1 provides Rtrim values required for some common
output voltages. By using a 0.5% tolerance resistor, se
t
point tolerance of ±2% can be achieved as specified in the
electrical specification.
Table 1 Rtrim is the external resistor in KΩ;
Vout is the desired output voltage
Rtrim setting (Ω)Output
Measurement
R.trim_Up R.trim_Down 0A
Vo 3.3 NC NC 3.323V
Vadj 4.0 5.36K NC 4.023V
Vadj 5.0 2.21K NC 5.019V
Vadj 6.5 1.18K NC 6.493V
Vadj 3.3*(1-10%) NC 36.5K 2.984V
The amount of power delivered by the module is the
voltage at the output terminals multiplied by the output
current. When using the trim feature, the output voltage
of the module can be increased, which at the same
output current would increase the power output of the
module. Care should be taken to ensure that the
maximum output power of the module must not exceed
the maximum rated power (Vo.set x Io.max ≤P max).
Voltage Margining
Output voltage margining can be implemented in the IPM
modules by connecting a resistor, Rmargin-up, from the Trim
pin to the ground pin for margining-up the output voltage
and by connecting a resistor, Rmargin-down, from the Trim pin
to the output pin for margining-down. Figure 32 shows
the circuit configuration for output voltage margining. If
unused, leave the trim pin unconnected.
Vo
On/Off
Vin
GND
Trim
IPM
Q2
Q1
Rmargin-up
Rmargin-down
Rtrim
Figure 32: Circuit configuration for output voltage margining

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THERMAL CONSIDERATIONS
Thermal management is an important part of the system
design. To ensure proper, reliable operation, sufficient
cooling of the power module is needed over the entire
temperature range of the module. Convection cooling is
usually the dominant mode of heat transfer.
Hence, the choice of equipment to characterize the
thermal performance of the power module is a wind
tunnel.
Thermal Testing Setup
Delta’s DC/DC power modules are characterized in
heated vertical wind tunnels that simulate the thermal
environments encountered in most electronics
equipment. This type of equipment commonly uses
vertically mounted circuit cards in cabinet racks in which
the power modules are mounted.
The following figure shows the wind tunnel
characterization setup. The power module is mounted
on a test PWB and is vertically positioned within the
wind tunnel. The height of this fan duct is constantly kept
at 25.4mm (1’’).
Thermal Derating
Heat can be removed by increasing airflow over the
module. To enhance system reliability, the power
module should always be operated below the maximum
operating temperature. If the temperature exceeds the
maximum module temperature, reliability of the unit may
be affected.
MODULE
A
IR FLOW
12.7 (0.5”)
50.8 (2.0”)
FACING PWB PWB
AIR VELOCIT
Y
AND AMBIENT
TEMPERATURE
MEASURED BELOW
THE MODULE
25.4 (1.0”)
Figure 31: Wind tunnel test setup figure dimensions are in
millimeters and (inches)