GE
CAR1248TN series rectifier
Input: 90Vac to 264Vac; Output: -54Vdc @ 1200W
Features
Preliminary Data Sheet
Universal input with PFC
Constant power characteristic
3 front panel LEDs: 1-input;2-output; 3 - fault
Remote ON/OFF control of the -54Vdc output
Remote sense on the -54Vdc output
No minimum load requirements
Redundant parallel operation
Active load sharing (single wire)
Hot Plug-ability
Efficiency: typically 91% @ 50% load
Auto recoverable OC & OT protection
Operating temperature: 0 - 70C (de-rated above 50C)
Digital status & control: I
2
C serial bus
EN/IEC/UL60950-1 2
nd
edition; UL, CSA and VDE
EMI: class A FCC docket 20780 part 15, EN55022
Meets EN6100 immunity and transient standards
Shock & vibration: NEBS GR-63-CORE, level 3
Applications
-48Vdc distributed power architectures
Cellular Base Stations
Blade Servers
Network Equipment
Network Attached Storage
Telecom Access Nodes
Routers/Switches
Broadband Switches
ATE Equipment
Description
The CAR1248TN series of rectifiers provide highly efficient isolated -54Vdc power from worldwide input mains in a
compact density of 19W/in
3
within a 1U industry standard form factor.
The high-density, front-to-back airflow is designed for minimal space utilization and is highly expandable for future
growth. I
2
C communications offers remote control and monitoring capabilities.
November 20, 2012
©2012 General Electric Company. All rights reserved.
GE
CAR1248TN series rectifier
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only, functional
operation of the device is not implied at these or any other conditions in excess of those given in the operations sections of the data sheet.
Exposure to absolute maximum ratings for extended periods can adversely affect the device reliability.
Parameter
Input Voltage: Continuous
Operating Ambient Temperature
Storage Temperature
I/O Isolation voltage to Frame (100% factory Hi-Pot tested)
All
Device
Symbol
V
IN
T
A
T
stg
Min
0
-10
-40
Max
264
70
1
85
1500
Unit
V
ac
°C
°C
V
ac
Input: 90Vac to 264Vac; Output: -54Vdc @ 1200W
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, load, and temperature conditions.
INPUT
Parameter
Operational Range
Frequency Range
Main Output Turn_OFF
Maximum Input Current
(V
O
= V
O, set
, I
O
=I
O, max
)
Cold Start Inrush Current
(Excluding x-caps, 25C, <10ms, per ETSI 300-132)
Efficiency
Vin= 230V
ac
All
(T
amb
=25C, V
out
= -54Vdc, I
O
=I
O, max
)
Vin= 90V
ac
Power Factor
(V
in
=230V
ac
, I
O
=I
O, max
)
Holdup time
V
in
= 230V
ac
(V
out
= -54Vdc, T
amb
25C, I
O
=I
O, max
)
V
in
= 90V
ac
Early warning prior to loss of DC output below regulation
Ride through
Leakage Current
(V
in
= 250V
ac
, Fin = 60Hz)
Isolation
V
IN
= 180V
ac
V
IN
= 100V
ac
Device
Symbol
V
IN
F
IN
V
IN
I
IN
I
IN
PF
T
Min
90
47
70
Typ
110/230
50/60
Max
264
63
80
7.9
12.75
40
Unit
V
ac
Hz
V
ac
A
ac
A
peak
%
90
85
0.99
16.7
20
2
8.3
3
3000
1500
500
ms
ms
ms
mA
rms
V
ac
V
ac
V
dc
T
I
IN
Input/Output
Input/Frame
Output/Frame
-54V
dc
MAIN OUTPUT
Parameter
Output Power
High Line Operation
Low Line Operation
Set point
Overall regulation (load, temperature, aging)
Ripple and noise
2
Device
180 – 264 V
ac
90 – 132V
ac
All
Symbol
W
Min
0
0
-53.9
-3
Typ
-
-
-54.00
Max
1200
1000
-54.1
+3
540
32
+3
Unit
W
W
V
dc
%
mV
p-p
dBrnc
%
V
out
Turn-ON overshoot
1
2
Derated above 50C at 2.5%/C
Measured across a 10µf electrolytic and a 0.1µf ceramic capacitors in parallel. 20MHz bandwidth
November 20, 2012
©2012 General Electric Company. All rights reserved.
Page 2
GE
CAR1248TN series rectifier
-54V
dc
MAIN OUTPUT (continued)
Parameter
Turn-ON delay
Remote ON/OFF delay time
Turn-ON rise time (10 – 90% of V
out
)
Transient response 50% step [10%-60%, 50% - 100%]
(dI/dt – 1A/µs, recovery 300µs)
Programmable range (hardware & software)
Overvoltage protection, latched
(reset by cycling OFF/ON via hardware or software)
Output current
V
in
– high line
V
in
– low line
Power/Current limit
V
in
– high line
V
in
– low line
Power limit down to -48Vdc
I
out
V
out
-5
-42
-58
0
P
out
-59
T
Input: 90Vac to 264Vac; Output: -54Vdc @ 1200W
Device
Symbol
Min
Typ
Max
2
40
50
+5
-58
-60
22.2
18.5
1200
1000
Unit
sec
ms
ms
%V
out
V
dc
V
dc
A
dc
W
All
Current limit below -48Vdc, Hiccup (programmable level)
Active current share
I
out
I
out
113
-10
130
+10
% of FL
% of FL
Environmental, Reliability
Parameter
Ambient Temperature
Operating
Altitude Operating
Power Derating
Storage
Altitude non-operating
Over Temperature Protection
Humidity
Operating
Storage
30
10
-10
3
50
2250
2.5
85
8200
120 / 110
95
95
6
4
100,000
200,000
°C
m
%/°C
°C
m
°C
%
Grms
Zone
Hrs
Air inlet from sea level to 5,000 feet.
7400 ft
51°C to 70C
30,000 ft
Shutdown / Restart
Relative humidity, non-condensing
NEBS GR-63-CORE, Level 3, 20 -2000Hz, minimum 30
minutes
NEBS GR-63-CORE, all floors, Seismic Zone 4 Designed and
tested to meet NEBS specifications.
Full load, 50C ambient, per Bellcore RPP
Demonstrated
Min
Typ
Max
Units
Notes
-40
Shock and Vibration acceleration
Earthquake Rating
MTBF
3
The unit will start up at -40C but is not guaranteed to meet specification limits until it is within the operating ambient range.
November 20, 2012
©2012 General Electric Company. All rights reserved.
Page 3
GE
CAR1248TN series rectifier
EMC
Parameter
AC input
Input: 90Vac to 264Vac; Output: -54Vdc @ 1200W
Criteria
Conducted emissions
Radiated emissions**
Voltage dips
EN55022
EN61000-4-11
Standard
EN55022, FCC Docket 20780 part 15, subpart J
Level
A
A
A
B
B
Test
0.15 – 30MHz
30 – 10000MHz
-30%, 10ms
-60%, 100ms
-100%, 5sec
4kV, 1.2/50µs, common mode
2kV, 1.2/50µs, differential mode
5/50ns, 2kV (common mode)
130dBµV, 0.15-80MHz, 80% AM
10V/m, 80-1000MHz, 80% AM
4kV contact, 8kV air
Voltage surge
immunity
Enclosure
immunity
Fast transients
Conducted RF fields
Radiated RF fields
ESD
EN61000-4-5
EN61000-4-4
EN61000-4-6
EN61000-4-3
ENV 50140
EN61000-4-2
A
A
B
A
A
A
B
** Radiated emissions compliance is contingent upon the final system configuration.
Status and Control
Signal Definitions
All signals and outputs are referenced to Output return. These
include ‘Vstb return’ and ‘Signal return’.
protected. A LO permits writing to the EEPROM. This signal is
pulled HI internally by the power supply.
Output signals
Output current monitor (Imon):
A voltage level proportional to
the output current is present on this pin. The signal level is
0. 2V per amp ± 0.25V.
AC OK:
TTL compatible open collector. Maximum sink current
20mA, max voltage is 12Vdc. A (HI) on this signal indicates
that the input voltage is present within limits.
DC OK:
TTL compatible, open collector. Maximum sink
current 20mA, max voltage is 12Vdc. A (HI) on this signal
indicates that the output voltage is present.
Over temp warning:
TTL compatible, open collector.
Maximum sink current 20mA, max voltage is 12Vdc. A (HI) on
this signal indicates that temperatures are normal.
If an over temperature should occur, this signal would delay
pulling LO for approximately 10 seconds. The unit would
restart if internal temperatures recover within normal
operational levels.
Fault:
TTL compatible, open collector. Maximum sink current
20mA, max voltage is 12Vdc. A (HI) on this signal indicates
that no faults are present.
This signal activates for OTP, OVP, or AC fault.
PS Present:
Connected to ‘output return’. Its intent is to
indicate to the system that a power supply is present. This
signal may need to be pulled HI externally through a resistor.
Interrupt:
A TTL compatible status signal, representing the
SMBusAlert# feature of the i
2
C protocol in the power supply.
This signal needs to be pulled HI externally through a resistor.
Maximum sink current
≤
4mA and the pull up resistor should
be tied to <5Vdc. Open collector (HI) on this signal indicates
that no Interrupt has been triggered.
Input Signals
Voltage programming (V
prog
):
An analog voltage on this signal
can vary the output voltage from -42Vdc to -58Vdc. The
equation of this signal is:
V
out
= 20x (V
prog
) 2.1 < V
prog
< 2.9
If Vprog is
≥
4V, or left open the programming signal is ignored
and the unit output is set at the setpoint of -54Vdc.
Load share (Ishare):
Single wire analog signal between power
supplies connected in parallel. The Ishare pins should be tied
together for power supplies. No resistors or capacitors should
get connected to this pin.
Remote ON/OFF:
Controls the presence of the main -54Vdc
output voltage. This is an open collector, TTL level control
signal. This signal needs to be pulled HI externally through a
resistor. Maximum collector voltage is 12Vdc, maximum sink
current is 1mA. Logic 1 turns ON the -54Vdc output, while a
Logic 0 turns OFF the -54Vdc output.
A turn OFF command either through this signal or firmware
commanded would turn OFF the -54V output.
Enable:
This is a short signal pin that controls the presence of
the -54Vdc main output. This pin should be connected to
‘output return’ on the system side of the output connector. The
purpose of this pin is to ensure that the output turns ON after
engagement of the power blades and turns OFF prior to
disengagement of the power blades.
Write protect (WP):
This signal protects the contents of the
external EEPROM. When left open the EEPROM is write
November 20, 2012
©2012 General Electric Company. All rights reserved.
Page 4
GE
CAR1248TN series rectifier
Input: 90Vac to 264Vac; Output: -54Vdc @ 1200W
Serial Bus Communications – CAR1248TN
The I²C interface facilitates the monitoring and control of
various operating parameters within the unit and transmits
these on demand over an industry standard I²C Serial bus.
All signals are referenced to ‘Signal Return’.
Device addressing:
The microcontroller (MCU) and the
EEPROM have the following addresses:
Device
MCU
EEPROM
1
1
Address Bit Assignments
(Most to Least Significant)
0
1
1
A2
A1
A0
0
1
0
A2
A1
A0
Vout [00]:
Output voltage read back, returns the voltage on
the anode side of the or’ing function, data LSB followed by
MSB.
The default value is -54Vdc
Example; readback 0211h, convert into its decimal equivalent
and then multiply by the constant, Vout = 529 x 0.102 =
54Vdc
Iout [01]:
Output current read back, data LSB followed by MSB.
Example; readback 021Fh, convert into its decimal equivalent
and multiply by the constant, Iout=543 x 0.042 = 22.8A
Temperature [02]:
Temperature read back, data LSB followed
by MSB.
Example; readback 037Bh, convert into its decimal equivalent
and multiply by the constant, temp = 891 x 0.005 = 4.36. In the
table below this corresponds to 25C
Data
4.83
4.78
4.72
4.65
4.56
4.46
4.35
4.21
4.06
3.89
Temp
C
-5
0
5
10
15
20
25
30
35
40
Data
3.71
3.51
3.3
3.09
2.88
2.67
2.46
2.25
2.06
1.88
Temp
C
45
50
55
60
65
70
75
80
85
90
Data
1.7
1.54
1.4
1.26
1.14
1.03
0.93
0.84
Temp
C
95
100
105
110
115
120
125
130
R/W
R/W
Address lines (A2, A1, A0):
Up to eight (8) modules to be
addressed on a single I²C bus. The pins are pulled HI internal
to the power supply. For a logic LO connect to ‘Output Return’
Serial Clock (SCL):
Host generated, this signal needs to be
pulled up externally ensuring that rise and fall time timing and
the maximum sink current is in compliance to the I²C
specification.
Serial Data (SDA):
This is a bi-directional line that needs to be
pulled up externally ensuring that rise and fall time timing and
the maximum sink current is in compliance to the I²C
specification.
Command code:
All registers are 16 bits, written as LSB followed by MSB.
All A/D’s are 10 bit (1024 steps). All constants can be fine-tuned
to compensate for manufacturing tolerances;
Name
Vout
Iout
Temperature
ON/OFF
Ilimit
Vset
Vprog
OT trip
OT recover
DC_OK_HI
DC_OK_LO
CMD
00
01
02
03
04
05
06
07
08
09
0A
Access
R
R
R
R/W
R/W
R/W
R
R/W
R/W
R/W
R/W
Default
/Name
-54
-
-
1 – OFF, 0 – ON
0.042
0.094
Vout= 20 x Vprog
120
0.005
110
0.005
55.6
0.102
52.4
0.102
Input
0
1-LL
AC_OK
1
DC_OK
2
OT
3
1-normal
Fault
4
Intrpt
5
OV
6
DC_INT
7
25
-54
Bits
Constant
0.102
0.042
0.005
ON/OFF [03]:
A logic ‘1’ turns OFF the -54V output of the
power supply.
Ilim [04]:
This feature lowers the current limit from the default
values of 0253h (595), corresponding to 25A at high line and
01EFh (495) corresponding to 20.8A at low line.
The delivered output current cannot exceed the maximum
power capacity of the unit. At high line the power supply is
limited to 1200W, thus, at -48Vdc the output current is limited
to 25A.
Example: At high line, reduce the current limit to 20A.
Compute the data to be sent to the controller; 20 / 0.042 =
476. The hex equivalent of this decimal data is 01DCh. The
data should be sent across the bus as LSB [DC] followed by
MSB [01].
Vset [05]:
Changes the output voltage via i2c, if the Vprog
hardware signal is > 4Vdc. If the Vprog pin voltage level is <
4Vdc, this command is ignored.
The output voltage setting must be between -42 – -58Vdc.
The default value is 023Eh, corresponding to -54Vdc.
Example; set the output to 48Vdc. Compute the data to be
sent to the controller; 48 / 0.094 = 510. The hex equivalent of
this decimal data is 01FEh. The data should be sent across the
bus as LSB [FE] followed by MSB [01].
STATUS
0B
R
Firmware
EEPROM
0C
0D-
7C
R
R/W
November 20, 2012
©2012 General Electric Company. All rights reserved.
Page 5
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