Data Sheet
AFBR-POCxxxL
Optical Power Converter
Description
AFBR-POCxxxL belongs to the Broadcom® Power
Components product family and converts optical power to
electrical power for applications requiring complete
electrical isolation in highly demanding industrial
environments and applications. AFBR-POCxxxL is an
excellent choice for powering electronic circuitry where
electrically-wired solutions are not feasible due to high
voltage, electromagnetic inductance, or strong magnetic
fields.
AFBR-POCxxxL is a multi-junction compound
semiconductor device that provides operating voltages for
typical 3 VDC or 5 VDC applications, depending on the chip
structure selected.
Typically 600 mW of electrical power can be supplied by
converting 1.5W (CW) of optical input power over an
operating temperature range from –40°C to +85°C.
Smart thermal design simplifies system integration.
AFBR-POCxxxL is optimized for the efficient coupling of MM
fibers with commonly available NA. All products are
available with industry-standard ST or FC connectors.
The AFBR-POCx04L optical power converters provide a
typical output voltage level of 3.7V supporting most 3 VDC
applications. The AFBR-POCx06L converters support most
5 VDC applications by providing a typical electrical output
voltage level of 6.1V.
Broadcom
Features
RoHS-compliant
Fully isolated Power over Fiber (PoF) solution that
efficiently converts optical power to electrical power
Different converter output characteristics are available
for a perfect match with target applications
Supplies typically 600 mW of electrical power
Operating temperature range of –40°C to +85°C
Available with threaded ST and FC ports for MM fibers
Easy heat sink mounting for thermal control
Threaded ST port for easy panel mount
Applications
Optical power converters can power devices, such as:
High voltage current sensors and transducers
E-field and H-field probes
MRI/RF imaging coils and patient monitoring equipment
Power conditioning circuitry
Wireless transmitters
Aircraft sensors and transducers
Available Options
3 VDC application; ST Port
AFBR-POC404L
3 VDC application; FC Port
AFBR-POC204L
5 VDC application; ST Port
AFBR-POC406L
5 VDC application; FC Port
AFBR-POC206L
AFBR-POCxxxL-DS103
March 15, 2018
AFBR-POCxxxL Data Sheet
Optical Power Converter
Package
Handling and Design Information
The RoHS-compliant compact optical power converters are
provided in solid metal housings.
CAUTION! The small junction size inherent in the design of
these components increases the components'
susceptibility to damage from electrostatic
discharge (ESD). Implement advanced static
precautions in handling and assembling these
components to prevent damage, degradation,
or both that may be induced by ESD.
Variants can be ordered with a threaded ST or FC port
protected by port caps.
When soldering, it is advisable to leave the protective port
cap on the unit to prevent dirt buildup in the fiber or optical
assemblies. Good system performance requires clean port
optics and cable ferrules to avoid obstructing the optical
path.
The optic components are hermetically sealed in a TO
header with a glass window. Any dirt particles in the optical
path could reduce the conversion efficiency.
AFBR-POCxxxL are photovoltaic devices.
Unless for controlled testing purposes, do not apply an
external voltage. For testing, make sure that polarities are
maintained and do not exceed the value of open circuit
voltage in the forward direction. This photovoltaic device
should never be exposed to reverse voltage bias.
Broadcom
AFBR-POCxxxL-DS103
2
AFBR-POCxxxL Data Sheet
Optical Power Converter
Mechanical Dimensions – ST Port
AFBR-POC4xxL
6.35
5.4
#2-56 UNC2B
(10)
3/8-32 UNEF-2A
Ø7.0
9.5
12.7
2.54
Ø0.43
1.6
21.2
7.6
Dimensions are in mm.
Mechanical Dimensions – FC Port
AFBR-POC2xxL
5.5
1.6
9.5
M8x0.75-6g
Ø0.43
12.7
2.54
#2-56 UNC2B
8.0
(10)
14.8
Dimensions are in mm.
Broadcom
AFBR-POCxxxL-DS103
3
AFBR-POCxxxL Data Sheet
Optical Power Converter
Regulatory Compliance
Feature
Test Method
Performance
Electrostatic Discharge (ESD) to the Electrical Pins Human Body Model
ESDA/JEDEC – JS-001-2017
Min. ± 100V
CAUTION! The small junction size inherent in the design of these components increases the components' susceptibility to
damage from electrostatic discharge (ESD). Implement advanced static precautions in handling and assembling
these components to prevent damage, degradation, or both that may be induced by ESD.
Process Compatibility
Parameter
Solder Environment
a,b
Symbol
Minimum
Typical
Maximum
Units
TSOLD
—
—
260
°C
tSOLD
—
—
10
seconds
a. Maximum temperature refers to peak temperature.
b. Maximum time refers to time spent at peak temperature.
Pin Description
The anode pin side is marked with "+"; the cathode pin side is marked with "–" on the housing.
Figure 1: Polarity of AFBR-POCxxxL Devices
Broadcom
AFBR-POCxxxL-DS103
4
AFBR-POCxxxL Data Sheet
Optical Power Converter
Details about AFBR-POCxxxL
AFBR-POCxxxL is a photovoltaic device.
The device is a multi-junction compound semiconductor, which works as a power source without any applied external
bias while providing electrical power to a load when illuminated. Unlike a standard photovoltaic device, such as a solar
cell that is a large semiconductor pn-junction, the power converter is small. Typically, the device is illuminated by light
emanating from an optical fiber; therefore, the light is highly concentrated. The AFBR-POCxxxL device is uniquely
designed to handle concentrated light levels, which helps to maintain high output of both voltage and current.
Except for controlled testing, do not apply an external voltage.
Never apply a reverse bias to the device.
The "+" marking on the housing stands for anode; the "–" for cathode.
The markings also indicate the current flow from "+" to" –", when a load is connected to the pins and light is coupled into
the device.
AFBR-POCxxxL devices operate without applying additional external voltage.
Use of voltage regulators is recommended for a stable, efficient, and controlled power extraction from
AFBR-POCxxxL devices.
Typically, photovoltaic devices, such as solar cells, do not have a continuous operating point and for optimum
performance, the load must be adjusted accordingly. This adjustment is primarily due to the influence of the optical input
power to the device output. Therefore, a fixed load power extraction is not an optimum method for power harvesting with
solar cells.
Conversely, the Broadcom optical power converters operate with controllable laser light coupled into optical fiber, which
results in stabilized output of the AFBR-POCxxxL device. For most applications, combining the device with a voltage
regulator, such as a DC/DC converter, is sufficient. Integration of ICs providing automatic maximum power point tracking
(MPPT) is another option.
Figure 2: Illustration of a Typical I-V Curve of Optical Power Converters
IOUT
Output Current (A)
Ishort
I at Pout max
V at Pout max
0
Output voltage (V)
Vopen
VOUT
Figure 2 illustrates the typical output current vs. output voltage characteristics of an optical power converter.
At short circuit, the current output is at its maximum, but no power is delivered. At open circuit, the voltage is at its maximum;
however, no power can be extracted. In between, a maximum power point exists, which is the product of the current and the
voltage at that specific point. In an ideal application, the load would be tailored to that maximum power point.
Broadcom
AFBR-POCxxxL-DS103
5
AFBR-POCxxxL Data Sheet
Optical Power Converter
Absolute Maximum Ratings
Absolute maximum ratings are those values beyond which damage to the device may occur if these limits are exceeded for
other than a short period of time.
Parameter
Symbol
Min.
Typ.
Max.
Units
Storage Temperature
TS
–40
—
85
°C
Operating Case Temperature
TC
–40
—
85
°C
Relative Humidity
RH
5
—
85
%
Popt IN
—
—
1.5
W
Optical Input Power Range
a
a. Optical input power (808 nm, continuous wave) at the end of a 30m long, connectorized MM fiber measured with an optical power meter.
Fiber Specifications
Protect connectorized fiber by a sleeve or a ceramic ferrule during handling.
Parameter
Core Diametera
Numeric Aperture
b
Fiber Length
Symbol
Min.
Typ.
Max.
Units
D
—
62.5
—
µm
NA
0.22
—
0.375
—
—
Application
specific
—
meter
a. The minimum and maximum fiber core diameter that can be used with AFBR-POCxxxL products is related to the fiber-specific numerical
aperture value.Typically fibers with core diameter from 50 µm to 200 µm match with the specified NA range (0.22 to 0.375). For highest energy
conversion efficiency fibers with NA from 0.22 to 0.28 are recommended.
b. Fiber length depends on application requirements, mainly depending on fiber attenuation. Exemplarily a typical GI-MM 62.5 µm/125 µm fiber
has an attenuation of around 3.5 dB/km at 830 nm.
Broadcom
AFBR-POCxxxL-DS103
6
AFBR-POCxxxL Data Sheet
Optical Power Converter
AFBR-POCx04L
Optical power converters provide electrical output voltage levels for most 3 VDC applications.
Operating Characteristics
All specified parameters are valid for operations at 25°C case temperature and the use of a thermal interface material rated
for a thermal contact resistance of less than 1.3 cm2K/W.
Parameter
Response optical spectrum rangea
Maximum Electrical Output Power vs.
optical input powerb
Output Voltage at
maximum electrical output power
Output Current at
maximum electrical output power
Symbol
Min.
Typ.
Max.
Units
IN
800
808
850
nm
Pout
at 0.5 Wopt IN
—
225
—
mW
Pout
at 1.0 Wopt IN
—
445
—
Pout
at 1.5 Wopt IN
—
650
—
Vout
at 0.5 Wopt IN
—
3.8
—
Vout
at 1.0 Wopt IN
—
3.7
—
Vout
at 1.5 Wopt IN
—
3.6
—
Iout
at 0.5 Wopt IN
—
60
—
Iout
at 1.0 Wopt IN
—
120
—
Iout
at 1.5 Wopt IN
—
180
—
V
mA
a. For operations over the entire temperature range, laser light with a wavelength not exceeding 830 nm is recommended.
b. Optical input power (808 nm, continuous wave) at the end of a 30m long, connectorized MM fiber measured with an optical power meter.
Valid for multimode fibers with NA from 0.22 to 0.28.
The product characteristic diagrams (Figure 3 through Figure 8) are based on measurements of an AFBR-POCx04L with a
laser emitting at 808 nm for optical input powers up to 1.5W.
Broadcom
AFBR-POCxxxL-DS103
7
AFBR-POCxxxL Data Sheet
Optical Power Converter
Figure 4: Output I-V Curves at 25°C; 1 × AFBR-POCx04L
0.25
0.25
0.2
0.2
Current (A)
Current (A)
Figure 3: Output I-V Curves at –40°C; 1 × AFBR-POCx04L
0.15
0.1
0.15
0.1
0.05
0.05
0
0
0
1
2
3
4
0
5
1
2
4
5
OpƟcal Input power:
OpƟcal Input power:
0.5 W
1.0 W
0.5 W
1.5 W
Figure 5: Output I-V Curves at +85°C; 1 × AFBR-POCx04L
1.0 W
1.5 W
Figure 6: Electrical Output Power; 1 × AFBR-POCx04L
0.2
Electrical Output Power (W)
1
0.15
Current (A)
3
Voltage (V)
Voltage (V)
0.1
0.05
0
0
1
2
3
4
0.8
0.6
0.4
0.2
5
0
0
Voltage (V)
0.5
OpƟcal Input power:
0.5 W
1.0 W
Case Temperature (°C):
1.5 W
-40
Figure 7: Efficiency; 1 × AFBR-POCx04L
-20
1
1.5
OpƟcal Input Power (W)
0
25
45
65
85
Figure 8: Output Voltage vs. Temperature; 1 × AFBR-POCx04L
5
60
50
Vmp (V)
Eĸciency (%)
4
40
3
2
1
30
-60
-40
OpƟcal Input power:
-20
0
40
Case Temperature (°C)
0.5W
Broadcom
20
1W
1.5W
60
80
100
0
0.5
1
Case Temperature (C):
-40
1.5
OpƟcal Input Power (W)
-20
0
25
45
65
85
AFBR-POCxxxL-DS103
8
AFBR-POCxxxL Data Sheet
Optical Power Converter
AFBR-POCx06L
Optical power converters provide electrical output voltage levels for most 5 VDC applications.
Operating Characteristics
All specified parameters are valid for operations at 25°C case temperature and the use of a thermal interface material rated
for a thermal contact resistance of less than 1.3 cm2K/W.
Parameter
Symbol
Min.
Typ.
Max.
Units
Response Optical Spectrum Rangea
IN
800
808
850
nm
Maximum Electrical Output Power vs.
optical input powerb
Pout
at 0.5 Wopt IN
—
240
—
mW
Pout
at 1.0 Wopt IN
—
480
—
Pout
at 1.5 Wopt IN
—
720
—
Vout
at 0.5 Wopt IN
—
6.2
—
Vout
at 1.0 Wopt IN
—
6.1
—
Vout
at 1.5 Wopt IN
—
6.0
—
Iout
at 0.5 Wopt IN
—
40
—
Iout
at 1.0 Wopt IN
—
80
—
Iout
at 1.5 Wopt IN
—
120
—
Output Voltage at
maximum electrical output power
Output Current at
maximum electrical output power
V
mA
a. For operations over the entire temperature range, laser light with a wavelength not exceeding 830 nm is recommended.
b. Optical input power (808 nm, continuous) at the end of a 30m long, connectorized MM fiber measured with an optical power meter. Valid for
multimode fibers with NA from 0.22 to 0.28.
The product characteristic diagrams (Figure 9 through Figure 14) are based on measurements of an AFBR-POCx06L with
a laser emitting at 808 nm for optical input powers up to 1.5W.
Broadcom
AFBR-POCxxxL-DS103
9
AFBR-POCxxxL Data Sheet
Optical Power Converter
Figure 10: Output I-V Curves at 25°C; 1 × AFBR-POCx06L
0.2
0.2
0.15
0.15
Current (A)
Current (A)
Figure 9: Output I-V Curves at –40°C; 1 × AFBR-POCx06L
0.1
0.05
0
0.1
0.05
0
1
2
3
4
Voltage (V)
5
6
0
7
0
1
2
3
OpƟcal Input power:
0.5 W
1.0 W
0.2
1
0.15
0.8
0.1
0.05
1
2
3
4
0.5 W
1.0 W
5
6
0
0
0.5
1.5
-20
0
25
45
65
85
Figure 14: Output Voltage vs. Temperature; 1 × AFBR-POCx06L
60
7
55
6
50
5
45
4
Vmp (V)
Efficiency (%)
1
Optical Input Power (W)
Case Temperature (°C):
Figure 13: Efficiency; 1 × AFBR-POCx06L
1.5 W
0.2
7
1.5 W
1.0 W
0.4
-40
40
3
2
35
30
7
0.6
Voltage (V)
OpƟcal Input power:
6
Figure 12: Electrical Output Power; 1 x AFBR-POCx06L
Electrical output power (W)
Current (A)
Figure 11: Output I-V Curves at 85°C; 1 × AFBR-POCx06L
0
5
OpƟcal Input power:
1.5 W
0.5 W
0
4
Voltage (V)
1
-60
-40
-20
0
20
40
Case Temperature (°C)
OpƟcal Input power:
0.5W
1W
60
80
100
0
0.5
1
Case Temperature (°C):
-40
Broadcom
1.5
Optical Input power (W)
1.5W
-20
0
25
45
65
85
AFBR-POCxxxL-DS103
10
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