PML8818LP [ERICSSON]
DC-DC Regulated Power Supply Module, 1 Output, 80W, Hybrid, ROHS COMPLIANT PACKAGE-12;型号: | PML8818LP |
厂家: | ERICSSON |
描述: | DC-DC Regulated Power Supply Module, 1 Output, 80W, Hybrid, ROHS COMPLIANT PACKAGE-12 |
文件: | 总24页 (文件大小:512K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
CJan2007
Key Features
•
•
•
•
•
•
•
•
16A output current
12V input voltage
Output voltages from (0.8V up to 1.8V)/(1.2V up to 5.5V)
Industry standard POLATM compatible
44.45 x 12.70 x 7.73 mm (1.750 x 0.500 x 0.305 in.)
High efficiency, up to. 93%
Auto TrackTM sequencing pin
More than 4.9 million hours MTBF
General Characteristics
•
•
•
•
•
•
Operating temperature: -40oC to 85 oC
Output short-circuit protection
Over temperature protection
On/Off inhibit control
Highly automated manufacturing ensures quality
ISO 9001/14001 certified supplier
Safety Approvals
Design for Environment
Pending
Meets requirements in high-
temperature lead-free soldering
processes.
Contents
General Information
Safety Specification
Absolute Maximum Ratings
............................................................. 2
............................................................. 3
............................................................. 4
Product Program
1.8 V/16 A
Ordering No.
PML 8218T ............................................
............................................................. 6
............................................................. 7
............................................................. 8
............................................................. 9
........................................................... 10
PML 8818L ............................................
........................................................... 12
........................................................... 13
........................................................... 14
........................................................... 15
........................................................... 16
........................................................... 17
0.8 V/16 A Electrical Specification
1.0 V/16 A Electrical Specification
1.2 V/16 A Electrical Specification
1.5 V/16 A Electrical Specification
1.8 V/16 A Electrical Specification
3.3 V/16 A
1.2 V/16 A Electrical Specification
1.5 V/16 A Electrical Specification
1.8 V/16 A Electrical Specification
2.5 V/16 A Electrical Specification
3.3 V/16 A Electrical Specification
5.0 V/16 A Electrical Specification
EMC Specification
........................................................... 18
........................................................... 18
........................................................... 20
........................................................... 21
........................................................... 22
........................................................... 23
........................................................... 23
........................................................... 24
Operating Information
Thermal Consideration
Connections
Mechanical Information
Soldering Information
Delivery Information
Product Qualification Specification
2
CJan2007
Compatibility with RoHS requirements
General Information
The products are compatible with the relevant clauses and
requirements of the RoHS directive 2002/95/EC and have a
maximum concentration value of 0.1% by weight in
homogeneous materials for lead, mercury, hexavalent
chromium, PBB and PBDE and of 0.01% by weight in
homogeneous materials for cadmium.
Ordering Information
See Contents for individual product ordering numbers.
Option
Through hole pin
Suffix
P
Ordering No.
PML 8818L P
PML 8218T P
Reliability
The Mean Time Between Failure (MTBF) is calculated at full
output power and an operating ambient temperature (TA) of
+40°C, which is a typical condition in Information and
Communication Technology (ICT) equipment. Different
methods could be used to calculate the predicted MTBF
and failure rate which may give different results. Ericsson
Power Modules currently uses Telcordia SR332.
Exemptions in the RoHS directive utilized in Ericsson
Power Modules products include:
-
Lead in high melting temperature type solder (used to
solder the die in semiconductor packages)
Lead in glass of electronics components and in
electronic ceramic parts (e.g. fill material in chip
resistors)
-
Predicted MTBF for the series is:
-
4.9 million hours according to Telcordia SR332, issue
1, Black box technique.
-
Lead as an alloying element in copper alloy containing
up to 4% lead by weight (used in connection pins
made of Brass)
Telcordia SR332 is a commonly used standard method
intended for reliability calculations in ICT equipment. The
parts count procedure used in this method was originally
modelled on the methods from MIL-HDBK-217F, Reliability
Predictions of Electronic Equipment. It assumes that no
reliability data is available on the actual units and devices
for which the predictions are to be made, i.e. all predictions
are based on generic reliability parameters.
The exemption for lead in solder for servers, storage and
storage array systems, network infrastructure equipment
for switching, signaling, transmission as well as network
management for telecommunication is only utilized in
surface mount products intended for end-users’ leaded
SnPb Eutectic soldering processes.
Quality Statement
The products are designed and manufactured in an
industrial environment where quality systems and methods
like ISO 9000, 6σ (sigma), and SPC are intensively in use to
boost the continuous improvements strategy. Infant
mortality or early failures in the products are screened out
and they are subjected to an ATE-based final test.
Conservative design rules, design reviews and product
qualifications, plus the high competence of an engaged
work force, contribute to the high quality of our products.
Warranty
Warranty period and conditions are defined in Ericsson
Power Modules General Terms and Conditions of Sale.
Limitation of Liability
Ericsson Power Modules does not make any other
warranties, expressed or implied including any warranty of
merchantability or fitness for a particular purpose
(including, but not limited to, use in life support
applications, where malfunctions of product can cause
injury to a person’s health or life).
3
CJan2007
Safety Specification
Isolated DC/DC converters
It is recommended that a slow blow fuse with a rating
twice the maximum input current per selected product be
used at the input of each DC/DC converter. If an input filter
is used in the circuit the fuse should be placed in front of
the input filter.
General information
Ericsson Power Modules DC/DC converters and DC/DC
regulators are designed in accordance with safety
standards IEC/EN/UL60950, Safety of Information
Technology Equipment.
In the rare event of a component problem in the input filter
or in the DC/DC converter that imposes a short circuit on
the input source, this fuse will provide the following
functions:
IEC/EN/UL60950 contains requirements to prevent injury
or damage due to the following hazards:
•
•
•
•
•
•
Electrical shock
Energy hazards
Fire
Mechanical and heat hazards
Radiation hazards
Chemical hazards
•
•
Isolate the faulty DC/DC converter from the input
power source so as not to affect the operation of
other parts of the system.
Protect the distribution wiring from excessive
current and power loss thus preventing
hazardous overheating.
On-board DC-DC converters are defined as component
power supplies. As components they cannot fully comply
with the provisions of any Safety requirements without
“Conditions of Acceptability”. It is the responsibility of the
installer to ensure that the final product housing these
components complies with the requirements of all
applicable Safety standards and Directives for the final
product.
The galvanic isolation is verified in an electric strength test.
The test voltage (Viso) between input and output is
1500 Vdc or 2250 Vdc for 60 seconds (refer to product
specification).
Leakage current is less than 1 μA at nominal input voltage.
24 V DC systems
The input voltage to the DC/DC converter is SELV (Safety
Extra Low Voltage) and the output remains SELV under
normal and abnormal operating conditions.
Component power supplies for general use should comply
with the requirements in IEC60950, EN60950 and
UL60950 “Safety of information technology equipment”.
48 and 60 V DC systems
There are other more product related standards, e.g.
IEEE802.3af “Ethernet LAN/MAN Data terminal equipment
power”, and ETS300132-2 “Power supply interface at the
input to telecommunications equipment; part 2: DC”, but
all of these standards are based on IEC/EN/UL60950 with
regards to safety.
If the input voltage to Ericsson Power Modules DC/DC
converter is 75 Vdc or less, then the output remains SELV
(Safety Extra Low Voltage) under normal and abnormal
operating conditions.
Single fault testing in the input power supply circuit should
be performed with the DC/DC converter connected to
demonstrate that the input voltage does not exceed
75 Vdc.
Ericsson Power Modules DC/DC converters and DC/DC
regulators are UL60950 recognized and certified in
accordance with EN60950.
If the input power source circuit is a DC power system, the
source may be treated as a TNV2 circuit and testing has
demonstrated compliance with SELV limits and isolation
requirements equivalent to Basic Insulation in accordance
with IEC/EN/UL60950.
The flammability rating for all construction parts of the
products meets requirements for V-0 class material
according to IEC 60695-11-10.
The products should be installed in the end-use
equipment, in accordance with the requirements of the
ultimate application. Normally the output of the DC/DC
converter is considered as SELV (Safety Extra Low
Voltage) and the input source must be isolated by
minimum Double or Reinforced Insulation from the primary
circuit (AC mains) in accordance with IEC/EN/UL60950.
Non-isolated DC/DC regulators
The input voltage to the DC/DC regulator is SELV (Safety
Extra Low Voltage) and the output remains SELV under
normal and abnormal operating conditions.
4
CJan2007
Absolute Maximum Ratings
Characteristics
min
—40
—40
typ
12
max
85
Unit
°C
Tamb
TS
Operating Temperature (see Thermal Consideration section)
Storage temperature
125
°C
VI
Input voltage
10.8
13.2
V
Positive logic option
Negative logic option
VI -0.5
N/A
Open
N/A
V
V
Inhibit On/Off pin voltage
(see Operating Information section)
Vinh
Stress in excess of Absolute Maximum Ratings may cause permanent damage. Absolute Maximum Ratings, sometimes referred to as no destruction limits, are
normally tested with one parameter at a time exceeding the limits of Output data or Electrical Characteristics. If exposed to stress above these limits, function and
performance may degrade in an unspecified manner.
Fundamental Circuit Diagram
3
2
1
2
+IN
+OUT
1
3
2
1
GND
Auto Track
TRK
ADJ
PWM Controller
Error Amplifier
Ref
INH
RC Block
GND
GND
GND
5
CJan2007
1.8 V/16 A Electrical Specification
PML 8218T
Tref = -40 to +85ºC, VI = 10.8 to 13.2 V, Radj = 130 Ω, unless otherwise specified under Conditions.
Typical values given at: Tref = +25°C, VI = 12 V, max IO , unless otherwise specified under Conditions.
Additional Cin1= 560µF; Cin2= 22µF and Cout= 330µF. See Operating Information section for selection of capacitor types.
Connect the sense pin, where available, to the output pin.
Characteristics
Conditions
min
10.8
typ
max
13.2
10.4
Unit
V
VI
Input voltage range
VI = increasing
VI = decreasing
9.5
9
UVLO Undervoltage lockout
V
8.8
0
CI
Internal input capacitance
Output power
TBD
µF
W
PO
28.8
50 % of max IO
88
87
η
Efficiency
%
max IO
Pd
Pli
Pinh
IS
Power Dissipation
Input idling power
Input standby power
Static Input current
Switching frequency
VI = 12 V, max IO
IO = 0, VI = 12 V
4.3
W
mW
mW
A
750
120
TBD
250
VI = 12 V (turned off with INHIBIT)
VI = 12 V, max IO
0-100 % of max IO
fs
200
300
kHz
Output voltage initial setting and
accuracy
VOi
Tref = +25°C, VI = 12 V, max IO
1.764
1.746
1.800
1.836
1.854
V
Output voltage tolerance band
Idling voltage
10-100 % of max IO
V
IO = 0, VI = 12 V
1.803
±10
V
VO
Line regulation
max IO
mV
mV
Load regulation
VI = 12 V, 0-100 % of max IO
±12
VI = 12 V, Load step 50-100-50 % of
max IO, di/dt = 1 A/µs,
see Note 1
VI = 12 V, Load step 50-100-50 % of
max IO, di/dt = 1 A/µs,
see Note 1
Load transient
voltage deviation
Vtr
ttr
100
70
mV
µS
Load transient recovery time
Ramp-up time
tr
VI = 12 V, max IO
TBD
TBD
ms
ms
(from 10−90 % of VOi)
Start-up time
(from VI connection to 90 % of VOi)
ts
VI = 12 V, max IO
Max IO
TBD
TBD
TBD
TBD
TBD
TBD
TBD
µS
ms
ms
ms
µS
ms
ms
A
tf
Ramp-down time
(from 90−10 % of VOi)
I
O = 0.1 A
O = 0.1 A
I
INHIBIT start-up time
VI = 12 V, Max IO
Max IO
Tinh
INHIBIT shutdown fall time
(From INHIBIT off to 10 % of VO)
I
O = 0.1 A
O = 0.1 A
I
IO
Output current
0
16
Ilim
Current limit threshold
Tref < max Tref,
30
2
A
See ripple & noise section,
max IO, VOi
VOac
Output ripple & noise
%VO
Note 1: Output filter according to Ripple & Noise section
6
CJan2007
0.8 V/16 A Typical Characteristics
Efficiency
PML 8218T
Power Dissipation
[W]
5.0
[%]
100
95
90
85
80
75
70
4.0
3.0
2.0
1.0
0.0
12 V
12 V
0
2
4
6
8
10
12
14
16 [A]
0
2
4
6
8
10
12
14
16 [A]
Dissipated power vs. load current and input voltage at
Tref = +25°C
Efficiency vs. load current and input voltage at Tref = +25°C
Output Current Derating
Output Characteristics
[A]
18
16
14
12
10
8
2.0 m/s
Nat. Conv.
1.0 m/s
TBD
6
4
2
0
0
20
40
60
80
[°C]
Available load current vs. ambient air temperature and airflow at
VI = 12 V, VOUT = 1.8 V. See Thermal Consideration section.
Output voltage vs. load current at Tref = +25°C
7
CJan2007
1.0 V/16 A Typical Characteristics
Efficiency
PML 8218T
Power Dissipation
[W]
5.0
[%]
100
95
90
85
80
75
70
4.0
3.0
2.0
1.0
0.0
12 V
12 V
0
2
4
6
8
10
12
14
16 [A]
0
2
4
6
8
10
12
14
16 [A]
Dissipated power vs. load current and input voltage at
Tref = +25°C
Efficiency vs. load current and input voltage at Tref = +25°C
Output Current Derating
Output Characteristics
[A]
18
16
14
12
10
8
2.0 m/s
Nat. Conv.
1.0 m/s
TBD
6
4
2
0
0
20
40
60
80
[°C]
Available load current vs. ambient air temperature and airflow at
VI = 12 V, VOUT = 1.8 V. See Thermal Consideration section.
Output voltage vs. load current at Tref = +25°C
8
CJan2007
1.2 V/16 A Typical Characteristics
Efficiency
PML 8218T
Power Dissipation
[W]
5.0
[%]
100
95
90
85
80
75
70
4.0
3.0
2.0
1.0
0.0
12 V
12 V
0
2
4
6
8
10
12
14
16 [A]
0
2
4
6
8
10
12
14
16 [A]
Dissipated power vs. load current and input voltage at
Tref = +25°C
Efficiency vs. load current and input voltage at Tref = +25°C
Output Current Derating
Output Characteristics
[A]
18
16
14
12
10
8
2.0 m/s
Nat. Conv.
1.0 m/s
TBD
6
4
2
0
0
20
40
60
80
[°C]
Available load current vs. ambient air temperature and airflow at
VI = 12 V, VOUT = 1.8 V. See Thermal Consideration section.
Output voltage vs. load current at Tref = +25°C
9
CJan2007
1.5 V/16 A Typical Characteristics
Efficiency
PML 8218T
Power Dissipation
[W]
5.0
[%]
100
95
90
85
80
75
70
4.0
3.0
2.0
1.0
0.0
12 V
12 V
0
2
4
6
8
10
12
14
16 [A]
0
2
4
6
8
10
12
14
16 [A]
Dissipated power vs. load current and input voltage at
Tref = +25°C
Efficiency vs. load current and input voltage at Tref = +25°C
Output Current Derating
Output Characteristics
[A]
18
16
14
12
10
8
2.0 m/s
Nat. Conv.
1.0 m/s
TBD
6
4
2
0
0
20
40
60
80
[°C]
Available load current vs. ambient air temperature and airflow at
VI = 12 V, VOUT = 1.8 V. See Thermal Consideration section.
Output voltage vs. load current at Tref = +25°C
10
CJan2007
1.8 V/16 A Typical Characteristics
Efficiency
PML 8218T
Power Dissipation
[%]
100
[W]
5.0
95
90
85
80
75
70
4.0
3.0
2.0
1.0
0.0
12 V
12 V
0
2
4
6
8
10
12
14
16 [A]
0
2
4
6
8
10
12
14
16 [A]
Dissipated power vs. load current and input voltage at
Tref = +25°C
Efficiency vs. load current and input voltage at Tref = +25°C
Output Current Derating
Output Characteristics
[A]
18
16
14
12
10
8
2.0 m/s
Nat. Conv.
1.0 m/s
TBD
6
4
2
0
0
20
40
60
80
[°C]
Available load current vs. ambient air temperature and airflow at
VI = 12 V, VOUT = 1.8 V. See Thermal Consideration section.
Output voltage vs. load current at Tref = +25°C
11
CJan2007
3.3 V/16 A Electrical Specification
PML 8818L
Tref = -40 to +85ºC, VI = 10.8 to 13.2 V, Radj = 2 kΩ, unless otherwise specified under Conditions.
Typical values given at: Tref = +25°C, VI = 12 V, max IO , unless otherwise specified under Conditions.
Additional Cin1= 560µF; Cin2= 22µF and Cout= 330µF. See Operating Information section for selection of capacitor types.
Connect the sense pin, where available, to the output pin.
Characteristics
Conditions
min
10.8
typ
max
13.2
10.4
Unit
V
VI
Input voltage range
VI = increasing
VI = decreasing
9.5
9
UVLO Undervoltage lockout
V
8.8
0
CI
Internal input capacitance
Output power
TBD
µF
W
PO
52.8
50 % of max IO
92
91
η
Efficiency
%
max IO
Pd
Pli
Pinh
IS
Power Dissipation
Input idling power
Input standby power
Static Input current
Switching frequency
VI = 12 V, max IO
IO = 0, VI = 12 V
5.3
W
mW
mW
A
970
120
TBD
325
VI = 12 V (turned off with INHIBIT)
VI = 12 V, max IO
0-100 % of max IO
fs
250
400
kHz
Output voltage initial setting and
accuracy
VOi
Tref = +25°C, VI = 12 V, max IO
3.234
3.201
3.300
3.366
3.399
V
Output voltage tolerance band
Idling voltage
10-100 % of max IO
V
IO = 0, VI = 12 V
3.305
±10
V
VO
Line regulation
max IO
mV
mV
Load regulation
VI = 12 V, 0-100 % of max IO
±12
VI = 12 V, Load step 50-100-50 % of
max IO, di/dt = 1 A/µs,
see Note 1
VI = 12 V, Load step 50-100-50 % of
max IO, di/dt = 1 A/µs,
see Note 1
Load transient
voltage deviation
Vtr
ttr
100
70
mV
µS
Load transient recovery time
Ramp-up time
tr
VI = 12 V, max IO
TBD
TBD
ms
ms
(from 10−90 % of VOi)
Start-up time
(from VI connection to 90 % of VOi)
ts
VI = 12 V, max IO
Max IO
TBD
TBD
TBD
TBD
TBD
TBD
TBD
µS
ms
ms
ms
µS
ms
ms
A
tf
Ramp-down time
(from 90−10 % of VOi)
I
O = 0.1 A
O = 0.1 A
I
INHIBIT start-up time
VI = 12 V, Max IO
Max IO
Tinh
INHIBIT shutdown fall time
(From INHIBIT off to 10 % of VO)
I
O = 0.1 A
O = 0.1 A
I
IO
Output current
0
16
Ilim
Current limit threshold
Tref < max Tref,
30
A
V
O ≤2.5; 1
See ripple & noise section,
max IO, VOi
VOac
Output ripple & noise
%VO
VO >2.5; 1.5
Note 1: Output filter according to Ripple & Noise section
12
CJan2007
1.2 V/16 A Typical Characteristics
Efficiency
PML 8818L
Power Dissipation
[%]
100
95
90
85
80
75
70
[W]
5.0
4.0
3.0
2.0
1.0
0.0
12 V
12 V
0
2
4
6
8
10
12
14
16 [A]
0
2
4
6
8
10
12
14
16 [A]
Dissipated power vs. load current and input voltage at
Tref = +25°C
Efficiency vs. load current and input voltage at Tref = +25°C
Output Current Derating
Output Characteristics
[A]
18
16
14
12
10
8
2.0 m/s
Nat. Conv.
1.0 m/s
TBD
6
4
2
0
0
20
40
60
80
[°C]
Available load current vs. ambient air temperature and airflow at
VI = 12 V, VOUT = 3.3 V. See Thermal Consideration section.
Output voltage vs. load current at Tref = +25°C
13
CJan2007
1.5 V/16 A Typical Characteristics
Efficiency
PML 8818L
Power Dissipation
[%]
100
95
90
85
80
75
70
[W]
5.0
4.0
3.0
2.0
1.0
0.0
12 V
12 V
0
2
4
6
8
10
12
14
16 [A]
0
2
4
6
8
10
12
14
16 [A]
Dissipated power vs. load current and input voltage at
Tref = +25°C
Efficiency vs. load current and input voltage at Tref = +25°C
Output Current Derating
Output Characteristics
[A]
18
16
14
12
10
8
2.0 m/s
Nat. Conv.
1.0 m/s
TBD
6
4
2
0
0
20
40
60
80
[°C]
Available load current vs. ambient air temperature and airflow at
VI = 12 V, VOUT = 3.3 V. See Thermal Consideration section.
Output voltage vs. load current at Tref = +25°C
14
CJan2007
1.8 V/16 A Typical Characteristics
Efficiency
PML 8818L
Power Dissipation
[%]
100
[W]
5.0
95
90
85
4.0
3.0
2.0
1.0
0.0
12 V
12 V
80
75
70
0
2
4
6
8
10
12
14
16 [A]
0
2
4
6
8
10
12
14
16 [A]
Dissipated power vs. load current and input voltage at
Tref = +25°C
Efficiency vs. load current and input voltage at Tref = +25°C
Output Current Derating
Output Characteristics
[A]
18
16
14
12
10
8
2.0 m/s
Nat. Conv.
1.0 m/s
TBD
6
4
2
0
0
20
40
60
80
[°C]
Available load current vs. ambient air temperature and airflow at
VI = 12 V, VOUT = 3.3 V. See Thermal Consideration section.
Output voltage vs. load current at Tref = +25°C
15
CJan2007
2.5 V/16 A Typical Characteristics
Efficiency
PML 8818L
Power Dissipation
[%]
100
[W]
5.0
95
90
85
4.0
3.0
2.0
1.0
0.0
12 V
12 V
80
75
70
0
2
4
6
8
10
12
14
16 [A]
0
2
4
6
8
10
12
14
16 [A]
Dissipated power vs. load current and input voltage at
Tref = +25°C
Efficiency vs. load current and input voltage at Tref = +25°C
Output Current Derating
Output Characteristics
[A]
18
16
14
12
10
8
2.0 m/s
Nat. Conv.
1.0 m/s
TBD
6
4
2
0
0
20
40
60
80
[°C]
Available load current vs. ambient air temperature and airflow at
VI = 12 V, VOUT = 3.3 V. See Thermal Consideration section.
Output voltage vs. load current at Tref = +25°C
16
CJan2007
3.3 V/16 A Typical Characteristics
Efficiency
PML 8818L
Power Dissipation
[%]
100
[W]
5.0
95
90
85
4.0
3.0
2.0
1.0
0.0
12 V
12 V
80
75
70
0
2
4
6
8
10
12
14
16 [A]
0
2
4
6
8
10
12
14
16 [A]
Dissipated power vs. load current and input voltage at
Tref = +25°C
Efficiency vs. load current and input voltage at Tref = +25°C
Output Current Derating
Output Characteristics
[A]
18
16
14
12
10
8
2.0 m/s
Nat. Conv.
1.0 m/s
TBD
6
4
2
0
0
20
40
60
80
[°C]
Available load current vs. ambient air temperature and airflow at
VI = 12 V, VOUT = 3.3 V. See Thermal Consideration section.
Output voltage vs. load current at Tref = +25°C
17
CJan2007
5.0 V/16 A Typical Characteristics
Efficiency
PML 8818L
Power Dissipation
[%]
100
[W]
6.0
95
90
85
5.0
4.0
3.0
2.0
1.0
0.0
12 V
12 V
80
75
70
0
2
4
6
8
10
12
14
16 [A]
0
2
4
6
8
10
12
14
16 [A]
Dissipated power vs. load current and input voltage at
Tref = +25°C
Efficiency vs. load current and input voltage at Tref = +25°C
Output Current Derating
Output Characteristics
[A]
18
16
14
12
10
8
2.0 m/s
Nat. Conv.
1.0 m/s
TBD
6
4
2
0
0
20
40
60
80
[°C]
Available load current vs. ambient air temperature and airflow at
VI = 12 V, VOUT = 3.3 V. See Thermal Consideration section.
Output voltage vs. load current at Tref = +25°C
18
CJan2007
EMC Specification
Output ripple and noise
Output ripple and noise measured according to figure below.
See Design Note 022 for detailed information.
Conducted EMI measured according to test set-up.
The fundamental switching frequency is 250 kHz for PML
8218T @ VI = 12 V, max IO and 325 kHz for PML 8818L @ VI =
12 V, max IO.
Conducted EMI Input terminal value (typ)
TBD
Output ripple and noise test setup
Operating information
Extended information for POLA products is found in
Application Note POLA (AN205).
EMI without filter
Input Voltage
The input voltage range 10.8 to 13.2 Vdc makes the product
easy to use in intermediate bus applications when powered
by a regulated 12 V bus converter. The PML product family is
also available with 3.3 V or 5 Vin.
TBD
Turn on/off Input Voltage
The POL regulators monitor the input voltage and will turn on
and turn off at predetermined levels.
The typical hysteresis between turn on and turn off input
voltage is 0.5 V.
Inhibit Control (INH)
Test set-up
The products are equipped with a
Inhibit control function referenced
to the primary negative input
connection (- In), positive logic. The
INHIBIT function allows the
regulator to be turned on/off by an
external device like a
Layout recommendation
The radiated EMI performance of the POL regulator will
depend on the PCB layout and ground layer design.
It is also important to consider the stand-off of the POL
regulator.
If a ground layer is used, it should be connected to the output
of the POL regulator and the equipment ground or chassis.
semiconductor or mechanical
switch.
The regulator will turn on when the input voltage is applied
with the INHIBIT pin open. Turn off is achieved by connecting
the INHIBIT pin to the - In. To ensure safe turn off, the voltage
difference between INHIBIT pin and the - In pin shall be less
than 0.6 V. The regulator will restart automatically when this
connection is opened.
A ground layer will increase the stray capacitance in the PCB
and improve the high frequency EMC performance.
19
CJan2007
Output Voltage Adjust (Vadj
)
External Capacitors
The output voltage can be set by means of an external
Input capacitors:
resistor, connected to the Vadj pin. Nominal output voltage 0.8
V(for PML 8218T) and 1.2 V(for PML 8818L) is set by leaving
the Vadj pin open. Adjustment can only be made to increase
the output voltage setting.
The recommended input capacitors are a 22 µF ceramic and
a minimum of 560 µF electrolytic type. For Vo >2.1 V and Io
>= 11 A, the 560 µF capacitance must be rated for 1200
mArms ripple current capability. For all other conditions, the
ripple current rating must be at least 750 mArms.
To increase the voltage a resistor should be connected
between the Vadj pin and GND pin. The resistor value of the
Output voltage adjust function can be calculated according to
the following formula.
Output capacitors (optional):
The recommended output capacitance of 330 µF will allow
the module to meet its transient response specification as
defined in the electrical specification.
R
SET = 10 kΩ × 0.8 V/( Vo- Vmin ) — Rs kΩ
For PML 8218T: Vmin = 0.8 V; Rs = 7.87 kΩ
For PML 8818L: Vmin = 1.2 V; Rs = 1.82 kΩ
When using one or more non-ceramic capacitors, the
calculated equivalent ESR should be no lower than 4 mΩ
(7mΩ using the manufacturer’s maximum ESR for a single
capacitor).
Input And Output Impedance
The impedance of both the input source and the load will
interact with the impedance of the POL regulator. It is
important that the input source has low characteristic
impedance. The regulators are designed for stable operation
without external capacitors connected to the input or output.
The performance in some applications can be enhanced by
addition of external capacitance as described under External
Decoupling Capacitors. If the input voltage source contains
significant inductance, the addition of a 100 µF capacitor
across the input of the POL regulator will ensure stable
operation. The capacitor is not required when powering the
POL regulator from an input source with an inductance below
10 µH.
Parallel Operation
Two POL regulators may be paralleled for redundancy if the
total power is equal or less than PO max. It is not
recommended to parallel the POL regulators without using
external current sharing circuits.
External Decoupling Capacitors
When powering loads with significant dynamic current
requirements, the voltage regulation at the point of load can
be improved by addition of decoupling capacitors at the load.
The most effective technique is to locate low ESR ceramic
and electrolytic capacitors as close to the load as possible,
using several parallel capacitors to lower the effective ESR.
The ceramic capacitors will handle high-frequency dynamic
load changes while the electrolytic capacitors are used to
handle low frequency dynamic load changes. Ceramic
capacitors will also reduce any high frequency noise at the
load.
Over Current Protection (OCP)
The POL regulators include current limiting circuitry for
protection at continuous overload.
The output voltage will decrease towards zero for output
currents in excess of the over-current threshold. The regulator
will resume normal operation after removal of the overload.
The load distribution should be designed for the maximum
output short circuit current specified. The current limit
operation is a “hick up” mode current limit.
It is equally important to use low resistance and low
inductance PCB layouts and cabling.
Soft-start Power Up
External decoupling capacitors will become part of the
control loop of the POL regulator and may affect the stability
margins. As a “rule of thumb”, 100 µF/A of output current can
be added without any additional analysis. The ESR of the
capacitors is a very important parameter. Power Modules
guarantee stable operation with a verified ESR value of >10
mΩ across the output connections.
From the moment a valid input voltage is applied, the soft-
start control introduces a short time-delay (typically 8 ms to
15 ms) before allowing the output voltage to rise.
The initial rise in input current when the input voltage first
starts to rise is the charge current drawn by the input
capacitors. Power-up is complete within 25 ms.
For further information please contact your local Ericsson
Power Modules representative.
20
CJan2007
Auto-Track™ Function
Thermal Consideration
The AutoTrack function is designed so that 2 or more POL
regulators can track each others output voltage tightly
together. This can be accomplished by connection the
AutoTrack pin to the output of another POL regulator or by
feeding an external voltage ramp on the pin. The AutoTrack
will automatically track any external voltage that is applied
within the given rules in Application Note POLA (AN205).
General
The POL regulators are designed to operate in different
thermal environments and sufficient cooling must be provided
to ensure reliable operation.
Cooling is achieved mainly by conduction, from the pins to
the host board, and convection, which is dependant on the
airflow across the regulator. Increased airflow enhances the
cooling of the POL regulator.
Pre-Bias Startup Capability
This often occurs in complex digital systems when current
from another power source is backfed through a dual-supply
logic component, such as FPGA or ASIC.
The PML family products incorporate synchronous rectifiers,
but will not sink current during startup, or whenever the Inhibit
pin is held low. However, to ensure satisfactory operation of
this function, certain conditions must be maintained.
The Output Current Derating graph found in the Output
section for each model provides the available output current
vs. ambient air temperature and air velocity at Vin = 12 V.
The POL regulator is tested on a 254 x 254 mm,
35 µm (1 oz), 8-layer test board mounted vertically in a wind
tunnel with a cross-section of 305 x 305 mm.
Proper cooling of the POL regulator can be verified by
measuring the temperature at positions P1, P2 and P3. The
temperature at these positions should not exceed the max
values provided in the table below.
Note that the max value is the absolute maximum rating
(non destruction) and that the electrical Output data is
guaranteed up to Tamb +85°C.
See Design Note 019 for further information.
Position
P1
Device
Pcb
Designation
Tref
max value
130º C(L&T)
P2
P3
Mosfet
130º C(L&T)
130º C(L&T)
Inductor
21
CJan2007
Thermal Consideration continued
Connections
Definition of reference temperature (Tref
)
The reference temperature is used to monitor the temperature
limits of the product. Temperatures above maximum Tref are
not allowed and may cause degradation or permanent
damage to the product. Tref is also used to define the
temperature range for normal operating conditions.
Tref is defined by the design and used to guarantee safety
margins, proper operation and high reliability of the module.
Ambient Temperature Calculation
TOP VIEW
TBD
Pin
Designation
Function
1,2,10,11
GND
Common ground connection
for the Vin and Vout power
connections.
3,4
Vout
The regulated positive power
output with respect to the
GND node.
5,6
7
Vin
The positive input voltage
power node to the module.
Vo Sense
The sense input allow the
regulation circuit to
compensate for voltage drop
between the module and the
load.
8
Vo Adjust
Track
A 0.1 W 1% resistor must be
directly connected between
this pin and pin 1(GND) to set
the output voltage.
9
This is an analog control
input that enables the output
voltage to follow an external
voltage.
12
Inhibit
Applying a low-level ground
signal to this input disables
the module’s output.
22
Technical Specification
EN/LZT 146 366 R1C Jan 2007
PML 8000 series
POL regulator, Input 12 V, Output 16 A/80 W
© Ericsson Power Modules AB
Mechanical Information
23
CJan2007
Soldering Information — Through Hole Mounting
The through hole mount version of the product is intended for
through hole mounting in a PCB. When wave soldering is
used, the temperature on the pins is specified to maximum
270 °C for maximum 10 seconds.
Maximum preheat rate of 4 °C/s and temperature of max
150 °C is suggested. When hand soldering, care should be
taken to avoid direct contact between the hot soldering iron
tip and the pins for more than a few seconds in order to
prevent overheating.
A no-clean (NC) flux is recommended to avoid entrapment of
cleaning fluids in cavities inside of the DC/DC power module.
The residues may affect long time reliability and isolation
voltage.
Delivery package information
The products can be delivered in antistatic trays.
Tray specifications
PET
Material
105 < ohms/square <1012
The trays can not be baked.
40 products /tray
200 products/box
Surface resistance
Bake ability
Tray capacity
Box capacity
24
CJan2007
Product Qualification Specification
Characteristics
Visual inspection
Biased life
IPC-A-610
MIL-STD-202F
Method 108
Temperature
Airflow
Duration
Ambient temperature
Convection airflow
1000 hours
Biased humidity
Thermal shock
MIL-STD-202F
Method 103
Temperature
Humidity
Duration
+85 °C
85 % RH
1000 hours
MIL-STD-202F
Method 107
Dwell time
Temperature
Number of cycles
15 min at each temperature extreme
-40 °C to +125 °C
200 cycles
Sinusoidal vibration
MIL-STD-883D
Method 2007.2
Frequency
Duration
20 — 2000 Hz
4 minutes in each direction (+/-) of three
axes
Number of shocks
4 in each direction (+/-) of three axes
Mechanical shock
MIL-STD-883D
Method 2002.3
Peak acceleration
Half-sine duration
Number of shocks
500 g
1 ms
5 in each direction (+/-) of three axes
Radiated emissions
EN55022
EN55022
Class B
Conducted emissions
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