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User Guide for
FEBFHR1200_SPG01A
Evaluation Board
High-Performance Shunt Regulator
Featured Fairchild Product:
FHR1200
Direct questions or comments
about this evaluation board to:
“Worldwide Direct Support”
Fairchild Semiconductor.com
© 2014 Fairchild Semiconductor Corporation
FEBFHR1200_SPG01A • Rev. 1.3
Table of Contents
TABLE OF CONTENTS.............................................................................................................................................. 2
LIST OF TABLES ...................................................................................................................................................... 2
LIST OF FIGURES..................................................................................................................................................... 3
1. Introduction ............................................................................................................................................. 5
1.1. Description .................................................................................................................................... 5
1.2. Features ........................................................................................................................................ 6
2. Evaluation Board Specifications ............................................................................................................. 8
3. Application Circuit Details ..................................................................................................................... 11
3.1. Application #3: Energy Storage Capacitor Charger .................................................................... 11
3.2. Application #4: Voltage Regulator & Reference ......................................................................... 12
3.3. Application #5: 0 to 6 V Regulator .............................................................................................. 23
3.4. Application #6: VCC or Brownout Regulator ................................................................................ 25
4. Schematic ............................................................................................................................................. 27
5. Bill of Materials ..................................................................................................................................... 28
6. Application Circuit Tests ....................................................................................................................... 30
7. Device Characteristic Data ................................................................................................................... 34
8. Revision History .................................................................................................................................... 40
List of Tables
TABLE 1.
VBE AND VREF VALUES AT 40 µA: GROUNDED CONFIGURATION ..................................................... 14
TABLE 2.
RESISTOR DIVIDER VALUES VS. OUTPUT VOLTAGE: GROUNDED CONFIGURATION (IZ, HFE, IB, VBE,
TA=55°C TO 150°C, ICC=200 µA, 1 MA) ................................................................................................................... 15
TABLE 3.
RESISTOR DIVIDER VALUES VS. OUTPUT VOLTAGE: GROUNDED CONFIGURATION ....................... 16
TABLE 4.
RESISTOR DIVIDER VALUES FOR ISOLATED OUTPUT REGULATOR.................................................. 17
TABLE 5.
VBE & VREF PERFORMANCE OVER-TEMPERATURE: GROUNDED CONFIGURATION .......................... 18
TABLE 6.
SIMPLE, LOW-COST 0 TO 6 V REGULATOR RESISTOR VALUES ........................................................ 23
TABLE 7.
APPLICATION #6: VCC OR BROWNOUT REGULATOR RESISTOR VALUES, LM431 CONFIGURED ....... 25
TABLE 8.
VREF TEMP STABILITY VS. IZ -55°C TO +150°C: GROUNDED CONFIGURATION.................................. 37
TABLE 9.
VREF TEMPERATURE STABILITY VS. IZ -40°C TO +125°C: GROUNDED CONFIGURATION ................... 37
© 2014 Fairchild Semiconductor Corporation
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FEBFHR1200_SPG01A • Rev. 1.3
List of Figures
FIGURE 1.
EVALUATION BOARD PHOTOGRAPH (ENLARGED) ........................................................................... 6
FIGURE 2.
EVALUATION BOARD FLOOR PLAN .................................................................................................. 7
FIGURE 3.
BREAK-AWAY PART ADAPTERS ....................................................................................................... 8
FIGURE 4.
ENERGY STORAGE CAPACITOR CHARGER ........................................................................................ 8
FIGURE 5.
POWER SUPPLY VOLTAGE REGULATOR ........................................................................................... 9
FIGURE 6.
LOW-VOLTAGE AUXILIARY REGULATOR .......................................................................................... 9
FIGURE 7.
LOW-COST VCC OR BROWNOUT REGULATOR................................................................................. 10
FIGURE 8.
ENERGY STORAGE CAPACITOR, REGULATED HIGH-EFFICIENCY CHARGER ..................................... 11
FIGURE 9.
ENERGY STORAGE CAPACITOR CHARGER, CIRCUIT OPERATION .................................................... 12
FIGURE 10.
APPLICATION CIRCUIT #4: OVERALL SCHEMATIC ........................................................................... 13
FIGURE 11.
APPLICATION CIRCUIT #4: ISOLATED OUTPUT, GROUNDED OUTPUT REGULATOR ........................ 13
FIGURE 12.
REFERENCE TEMPERATURE STABILITY AT 200 µA & 1 MA: GROUNDED CONFIGURATION ............ 15
FIGURE 13.
ISOLATED OUTPUT REGULATOR: 431 CONFIGURATION ................................................................ 16
FIGURE 14.
NON-ISOLATED OUTPUT REGULATOR: GROUNDED CONFIGURATION ........................................... 17
FIGURE 15.
BASIC CONCEPT OF PRIMARY-SIDE REGULATOR: GROUNDED CONFIGURATION ........................... 18
FIGURE 16.
PRIMARY-SIDE REGULATOR BASED ON APP #4: GROUNDED CONFIGURATION ............................. 19
FIGURE 17.
CONCEPT OF FLOATING REGULATOR BASED ON APP #4 CIRCUIT .................................................. 19
FIGURE 18.
FLOATING REGULATOR USING APP #4 CIRCUIT: GROUNDED CONFIGURATION............................. 20
FIGURE 19.
CONCEPT FOR PROGRAMMABLE POWER ZENER: APP #4 CIRCUIT ................................................ 20
FIGURE 20.
CHARACTERIZATION OF FHR1200 USED AS ZENER ........................................................................ 21
FIGURE 21.
FHR1200 DYNAMIC IMPEDANCE ................................................................................................... 21
FIGURE 22.
CONCEPT AND ACTUAL VOLTAGE REFERENCE USING APP #4 CIRCUIT ........................................... 22
FIGURE 23.
HOW TO ADD THE APP #4 MODULE TO AN EXISTING POWER SUPPLY .......................................... 22
FIGURE 24.
SIMPLE, LOW-COST 0 TO 6 V REGULATOR: APPLICATION CIRCUIT #5 ............................................ 23
FIGURE 25.
FHR1200 THERMAL DE-RATING ..................................................................................................... 24
FIGURE 26.
APPLICATION #5: 3.3 V POWER SUPPLY THERMAL CALCULATION ................................................. 24
FIGURE 27.
APPLICATION #6: VCC OR BROWNOUT REGULATOR DESIGN .......................................................... 25
FIGURE 28.
APPLICATION #6: BROWNOUT & AUXILIARY REGULATOR: LM431 CONFIGURED .......................... 26
FIGURE 29.
EVALUATION BOARD SCHEMATICS ............................................................................................... 27
FIGURE 30.
CONNECTING THE EVALUATION BOARD FOR TEST ........................................................................ 30
FIGURE 31.
BREAK-AWAY DETAIL FOR SOCKET ADAPTERS .............................................................................. 30
FIGURE 32.
TESTING THE FHR1200 DEVICES ON THE SOCKET ADAPTERS ......................................................... 31
FIGURE 33.
TEST OF THE ENERGY CAPACITOR CHARGER OPERATION .............................................................. 31
© 2014 Fairchild Semiconductor Corporation
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FEBFHR1200_SPG01A • Rev. 1.3
FIGURE 34.
ENERGY CAPACITOR CHARGER CIRCUIT OPERATION DESCRIPTION ............................................... 32
FIGURE 35.
VOLTAGE REGULATOR CIRCUIT CHECKOUT ................................................................................... 32
FIGURE 36.
3.3 V LOW-VOLTAGE REGULATOR CHECKOUT ............................................................................... 33
FIGURE 37.
VCC OR BROWNOUT REGULATOR CIRCUIT CHECKOUT ................................................................... 33
FIGURE 38.
CALCULATING THE FHR1200 REFERENCE TEMPERATURE COEFFICIENT ......................................... 34
FIGURE 39.
LM431 CONFIGURED REFERENCE TEMPERATURE STABILITY ......................................................... 34
FIGURE 40.
VREF; 10 µA, 25 µA IZ TEMPERATURE STABILITY: GROUNDED CONFIGURATION ............................. 35
FIGURE 41.
VREF; 40 µA, 60 µA IZ TEMPERATURE STABILITY: GROUNDED CONFIGURATION ............................. 35
FIGURE 42.
VBE; 10 µA, 25 µA IZ TEMPERATURE STABILITY: GROUNDED CONFIGURATION .............................. 36
FIGURE 43.
VBE; 40 µA, 60 µA IZ TEMPERATURE STABILITY: GROUNDED CONFIGURATION .............................. 36
FIGURE 44.
BJT HFE VARIATION OVER TEMPERATURE .................................................................................... 38
FIGURE 45.
ZENER VOLTAGE VS. IZ VS. TEMPERATURE .................................................................................... 38
FIGURE 46.
ZENER TEMPERATURE COEFFICIENT CHANGE OVER TEMPERATURE ............................................. 39
FIGURE 47.
FHR1200 SMALL-SIGNAL RESPONSE .............................................................................................. 39
© 2014 Fairchild Semiconductor Corporation
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FEBFHR1200_SPG01A • Rev. 1.3
This user guide supports four applications for the FHR1200. It should be used in
conjunction with the FHR1200 datasheet as well as Fairchild’s application notes and
technical support team. Please visit Fairchild’s website at www.fairchildsemi.com.
1.
Introduction
This document describes four proposed applications for the FHR1200 high-performance
shunt regulator. These include:
A. Two each SC70-to-DIP adapters: The small size of the SC70 can make it difficult to
solder to the part for prototyping. Each adapter is supplied with a FHR1200 already
soldered down.
B. A 3.3 V-to-12 V regulated energy-storage-capacitor charger. Some smart meters only
consume around 250 mW 99% of the time so can use a single 3.3 V low-power offline
supply. However, to transmit, they require much higher power for a few milliseconds and
can pull this voltage from a storage capacitor charged to a higher voltage.
C. Voltage regulator and reference: This module can be used with most power supply
topologies and on isolated, non-isolated, primary-side, and floating applications.
D. Low-cost, low-voltage auxiliary regulator: Some designs need a regulated voltage in the
0 to 6 V range at just a few milliamps. The FHR1200 makes it possible to create a lowcost regulator for this application and can operate with an input voltage to >100 V.
E. Simple VCC or brownout regulator: Many power supply designs require that the VCC
voltage be regulated for the controller. The low operating current, high voltage and wide
temperature range make the FHR1200 a good choice for general regulation applications.
This document contains a general description of the FHR1200, the specifications for each
application circuit, schematics, bill of materials, and the typical operating characteristics.
1.1. Description
The FHR1200 is a high-efficiency regulator that outperforms a typical shunt regulator in
applications where low operating power, wide temperature range, and wide voltage range
are important. The regulator also features better stability and faster response than many
existing regulators.
The FHR1200 can be used for isolated and non-isolated secondary side regulation plus,
primary side, and floating regulation because the regulator can directly drive a power
supply controller. This reduces parts count and circuit complexity in many applications.
Non-isolated secondary-side regulation saves the cost of OPTOs and simplifies the power
supply design.
The FHR1200 can be used in many diverse applications. For example: V CC regulators to
>100 V, small additional auxiliary power supplies, programmable precision Zener diodes
(both high and low power), plus numerous analog circuits.
The FHR1200 can also be used as a standalone, low-cost, thermally stable, ~7.5 V
voltage reference.
© 2014 Fairchild Semiconductor Corporation
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FEBFHR1200_SPG01A • Rev. 1.3
1.2. Features











Low Current Operation: <10 µA
Programmable Output: 7.5 to >100 V
Fewest External Component Count
Temperature Compensated: Typical <50 ppm
Low Dynamic Impedance
Fast Turn-On
Low Output Noise
Sink Current Capability: 10 µA to 50 mA
Reference Voltage Accuracy: ±2%
Wide Operating Temperature Range: -55 to 150°C
Available in the 6-Lead SC70 Package
Figure 1.
Evaluation Board Photograph (Enlarged)
The evaluation board is the size of an average business card, yet consists of six isolated
PCB circuits that can make it quicker and easier to evaluate many potential applications.
For example, the designer can use the break-away voltage regulator (app #4) to substitute
for the existing output regulator on the power supply to evaluate the improvement over a
current design; saving the cost and time of a PCB update to evaluate the part.
© 2014 Fairchild Semiconductor Corporation
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FEBFHR1200_SPG01A • Rev. 1.3
Figure 2. Evaluation Board Floor Plan
© 2014 Fairchild Semiconductor Corporation
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FEBFHR1200_SPG01A • Rev. 1.3
2.
Evaluation Board Specifications
Figure 3. Break-Away Part Adapters
Figure 4. Energy Storage Capacitor Charger
© 2014 Fairchild Semiconductor Corporation
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FEBFHR1200_SPG01A • Rev. 1.3
Figure 5. Power Supply Voltage Regulator
Figure 6. Low-Voltage Auxiliary Regulator
© 2014 Fairchild Semiconductor Corporation
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FEBFHR1200_SPG01A • Rev. 1.3
Figure 7. Low-Cost VCC or Brownout Regulator
© 2014 Fairchild Semiconductor Corporation
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FEBFHR1200_SPG01A • Rev. 1.3
3.
Application Circuit Details
3.1. Application #3: Energy Storage Capacitor Charger
This circuit is used to charge an energy storage capacitor to 12 V. This voltage was
selected based on the requirements of a smart meter customer. Other voltages could have
been used by modifying the value of resistor R22. The maximum regulated output
voltage is limited by the breakdown voltage of the switch transistor, Q5, and of diodes,
U6. Some smart meters only consume around 250 mW, 99% of the time, so can use a
single 3.3 V low-power offline supply to maximize overall efficiency. However, to
transmit, they require much higher voltage for a few milliseconds. This can be pulled
from a storage capacitor charged to a higher voltage. The charger must be very efficient
and consume little power once the capacitor is charged to the pre-determined voltage.
The PCB layout allows the circuit to be built two ways. The supplied board uses the BJT,
Q4, and the logic inverter, U7. An alternate method using the comparator, U8, would
have a lower parts count and improved efficiency, but had not been tested at the time the
board was built and verified.
Dual diodes, U6, minimize the output leakage current of the charger to minimize the
discharge of the outboard energy storage capacitor. During operation, the circuit charges
the energy storage capacitor until the capacitor voltage reaches 12 V. The circuit then
starts to pulse very slowly to overcome the circuit leakages.
Figure 8. Energy Storage Capacitor, Regulated High-Efficiency Charger
© 2014 Fairchild Semiconductor Corporation
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FEBFHR1200_SPG01A • Rev. 1.3
Figure 9. Energy Storage Capacitor Charger, Circuit Operation
3.2. Application #4: Voltage Regulator & Reference
Application circuit #4 can be used for voltage regulation on many power supply
topologies and on isolated, non-isolated, primary side, and floating applications. It can
also be used as a 7.5 V thermally stable, wide temperature range, low-current, voltage
reference. The small circuit allows it to directly replace existing regulators on power
supplies for evaluation. The circuit is arranged to be broken off the main board to
facilitate prototyping.
The PCB layout allows the circuit to be built in a variety of ways to facilitate:
1. Isolated regulation using one of two possible OPTO isolators. The FOD817D OPTO
isolator provides the lowest cost regulation. The H11AG1VM OPTO isolator provides
the highest efficiency regulation. H11AG1VM is specified to operate to less than
200 µA, while the FOD817D is specified to operate to a minimum of 1.0 mA.
2. Non-isolated operation by removing both OPTOs.
3. Grounded-output operation that directly drives a controller to minimize parts count
and cost, or to configure the FHR1200 regulator as an LM431-type stacked regulator.
4. Isolated output-side regulation. It may also be configured for: non-isolated output-side
regulation, primary-side regulation, or floating regulation with a buck regulator.
5. Building a thermally compensated, wide input range, voltage reference.
© 2014 Fairchild Semiconductor Corporation
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FEBFHR1200_SPG01A • Rev. 1.3
Figure 10. Application Circuit #4: Overall Schematic
Figure 11. Application Circuit #4: Isolated Output, Grounded Output Regulator
© 2014 Fairchild Semiconductor Corporation
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FEBFHR1200_SPG01A • Rev. 1.3
Table 1 illustrates how the FHR1200 reference VBE and VREF voltages are related at
40 µA reference current in the grounded configuration over temperature. At 40 µA, the
reference is very stable, as shown in Figure 12. Table 2 provides additional data for
designers to determine the optimum operating currents for a design and gives the
optimum value for resistor R4. R4 sets the Zener current in the grounded configuration.
Figure 12 illustrates the stability of the FHR1200 reference at 200 µA or 1.0 mA
collector current and 40 µA Zener current in the grounded configuration. The FHR1200
reference voltage is the sum of the Zener voltage plus the base emitter voltage of the BJT,
which also serves as the error amplifier. The BJT base-emitter temperature coefficient
(“tempco”) is approximately -2.2 mV/°C. The Zener was selected to have a tempco that
closely matches the BJT base-emitter tempco, but in the opposite direction. Note: Zener
temperature coefficients vary widely from one Zener voltage to the next, from
manufacture to manufacture, and over applied current. The FHR1200 Zener was selected
to provide the most consistent VBE match over temperature.
Table 2 helps determine the optimum resistor values to properly bias the Zener and BJT
over temperature. Table 3 provides resistor divider values versus output voltage in the
Grounded Configuration.
Table 1-Table 3 and Figure 12 provide the data to set up the FHR1200 regulator.
Table 1. VBE and VREF Values at 40 µA: Grounded Configuration
© 2014 Fairchild Semiconductor Corporation
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FEBFHR1200_SPG01A • Rev. 1.3
Figure 12. Reference Temperature Stability at 200 µA & 1 mA: Grounded Configuration
Table 2. Resistor Divider Values vs. Output Voltage: Grounded Configuration
(IZ, hfe, IB, VBE, TA=55°C to 150°C, ICC=200 µA, 1 mA)
© 2014 Fairchild Semiconductor Corporation
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FEBFHR1200_SPG01A • Rev. 1.3
Table 3. Resistor Divider Values vs. Output Voltage: Grounded Configuration
Figure 13 illustrates how Application Circuit #4 can be modified for an LM431-type
configuration. This configuration stacks the Zener and the BJT so that the same current
that flows through the Zener flows through the base-emitter of the BJT. The circuit uses
one less component and can operate at currents below 10 µA.
Figure 13. Isolated Output Regulator: 431 Configuration
© 2014 Fairchild Semiconductor Corporation
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FEBFHR1200_SPG01A • Rev. 1.3
Table 4 gives the voltage divider values for different regulator voltages given a 200 µA
collector current and a 50 µA divider current.
Table 4. Resistor Divider Values for Isolated Output Regulator
Figure 14 shows how application circuit #4 can be used to make a non-isolated output
regulator. The grounded configuration is used because the output of the regulator must
directly drive a power supply controller to ground on the feedback pin. The values of R1
and R2 were selected for an output voltage of 24 V. R4 was selected to set the Zener
current to 25 µA.
Table 5 provides the VBE and VREF voltage when the Zener current (IZ) is set to 25 µA and
the collector current is set to 200 µA. This biasing reduces the regulator power
dissipation to 2.4 mW with a 24 V output voltage.
Figure 14. Non-Isolated Output Regulator: Grounded Configuration
© 2014 Fairchild Semiconductor Corporation
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FEBFHR1200_SPG01A • Rev. 1.3
Table 5. VBE & VREF Performance Over-Temperature: Grounded Configuration
Figure 15. Basic Concept of Primary-Side Regulator: Grounded Configuration
© 2014 Fairchild Semiconductor Corporation
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FEBFHR1200_SPG01A • Rev. 1.3
Figure 16. Primary-Side Regulator Based on App #4: Grounded Configuration
Figure 17. Concept of Floating Regulator Based on App #4 Circuit
© 2014 Fairchild Semiconductor Corporation
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FEBFHR1200_SPG01A • Rev. 1.3
Figure 18. Floating Regulator Using App #4 Circuit: Grounded Configuration
Figure 19. Concept for Programmable Power Zener: App #4 Circuit
© 2014 Fairchild Semiconductor Corporation
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FEBFHR1200_SPG01A • Rev. 1.3
Figure 20. Characterization of FHR1200 used as Zener
Figure 21. FHR1200 Dynamic Impedance
© 2014 Fairchild Semiconductor Corporation
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FEBFHR1200_SPG01A • Rev. 1.3
Figure 22. Concept and Actual Voltage Reference Using App #4 Circuit
Figure 23. How to Add the App #4 Module to an Existing Power Supply
© 2014 Fairchild Semiconductor Corporation
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FEBFHR1200_SPG01A • Rev. 1.3
3.3. Application #5: 0 to 6 V Regulator
Application circuit #5 is a 0 V to 6 V, 0 mA to 50 mA voltage regulator made of an
FHR1200 and a few resistors. It can be used for voltage regulation where just a few
milliamps are needed for an auxiliary circuit, such as a micro-controller. The small size
and low-cost of the circuit allows it to be used where space and cost is a consideration.
Figure 24. Simple, Low-Cost 0 to 6 V Regulator: Application Circuit #5
Table 6. Simple, Low-Cost 0 to 6 V Regulator Resistor Values
© 2014 Fairchild Semiconductor Corporation
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FEBFHR1200_SPG01A • Rev. 1.3
Figure 25. FHR1200 Thermal De-Rating
Figure 26. Application #5: 3.3 V Power Supply Thermal Calculation
© 2014 Fairchild Semiconductor Corporation
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FEBFHR1200_SPG01A • Rev. 1.3
3.4. Application #6: VCC or Brownout Regulator
Many power supply designs require that the VCC voltage be regulated for the controller.
The FHR1200 low operating current, high voltage, and wide temperature range make it a
good choice for general regulation applications.
Figure 27. Application #6: VCC or Brownout Regulator Design
Table 7. Application #6: VCC or Brownout Regulator Resistor Values, LM431
Configured
© 2014 Fairchild Semiconductor Corporation
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FEBFHR1200_SPG01A • Rev. 1.3
Figure 28. Application #6: Brownout & Auxiliary Regulator: LM431 Configured
© 2014 Fairchild Semiconductor Corporation
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FEBFHR1200_SPG01A • Rev. 1.3
4.
Schematic
Figure 29. Evaluation Board Schematics
© 2014 Fairchild Semiconductor Corporation
27
FEBFHR1200_SPG01A • Rev. 1.3
5.
Bill of Materials
Item
Description
Distributor Distributor Part Number
MFG
Qty
Designator
1.
0 Ω 0.5 W 1210 SMT
Mouser
667-ERJ-14Y0R00U
Panasonic
1
R30
2.
47 Ω 1% 0.125 W 0805 SMT
Mouser
660-RK73H2ATTD47R0F
KOA
1
R28
Mouser
660-RK73H2BTTD1100F
KOA
1
R15
R12
Remarks
Resistors and Pots
3. 110 Ω 1% 0.25 W Resistor 1206 SMT
4.
604 Ω 1 W 2512 SMT
Mouser
660-RK73H3ATTE6040F
KOA
1
5.
1 kΩ 1% 0.125 W 0805 SMT
Mouser
660-RK73H2ATTD1001F
KOA
1
R3,
6.
2.87 kΩ 1% 0.125 W 0805 SMT
Mouser
660-RK73H2ATTD2871F
KOA
1
R11
7.
4.64 kΩ 1% 0.125 W 0805 SMT
Mouser
660-RK73H2ATTD4641F
KOA
1
R8
8.
4.75 kΩ 1% 0.125 W 0805 SMT
Mouser
660-RK73H2ATTD4751F
KOA
1
R5
9.
10.0 kΩ 1% 0.125 W 0805 SMT
Mouser
660-RK73H2ATTD1002F
KOA
1
R6, R24
10.
12.7 kΩ 1% 0.125 W 0805 SMT
Mouser
660-RK73H2ATTD1272F
KOA
1
R9
11.
15.0 kΩ 1% 0.125 W 0805 SMT
Mouser
660-RK73H2ATTD1502F
KOA
1
R4
12.
22.1 kΩ 1% 0.125 W 0805 SMT
Mouser
660-RK73H2ATTD2212F
KOA
1
R31
13.
27.0 kΩ 1% 0.125 W 0805 SMT
Mouser
660-RK73H2ATTD2702F
KOA
1
R23
14.
39.2 kΩ 1% 0.125 W 0805 SMT
Mouser
660-RK73H2ATTD3922F
KOA
1
R22
15.
46.4 kΩ 1% 0.125 W 0805 SMT
Mouser
660-RK73H2ATTD4642F
KOA
1
R2
16.
68.1 kΩ 1% 0.125 W 0805 SMT
Mouser
660-RK73H2ATTD6812F
KOA
1
R21
17.
82.5 kΩ 1% 0.125 W 0805 SMT
Mouser
660-RK73H2ATTD8252F
KOA
1
R1
18.
100 kΩ 1% 0.125 W 0805 SMT
Mouser
660-RK73H2ATTD1003F
KOA
2
R10, R25
19.
274 kΩ 1% 0.125 W 0805 SMT
Mouser
660-RK73H2ATTD2743F
KOA
1
R26
20.
475 kΩ 1% 0.125 W 0805 SMT
Mouser
660-RK73H2ATTD4753F
KOA
1
R18
21.
750 kΩ 1% 0.125 W 0805 SMT
Mouser
660-RK73H2ATTD7503F
KOA
1
R19
22.
1.24 MΩ 1% 0.125 W 0805 SMT
Mouser
660-RK73H2ATTD1244F
KOA
1
R27
Optional.
Do not install
23.
0.125 W 0805 SMT
Optional
1
R7
Optional.
Do not install
24.
0.125 W 0805 SMT
Optional
1
R17
Optional.
Do not install
Optional.
Do not install
Capacitors
100 pF COG 5% 100 V Ceramic 0805
25.
SMT
Mouser
581-08051A101J
AVX
1
C10
26.
10 nF Ceramic Capacitor 50 V 0805
SMT
Mouser
80-C0805C103K5R
Kemet
1
C1
27.
0.1 µF Ceramic Capacitor 50 V 0805
SMT
Mouser
581-08055C104K
AVX
5
C2, C5, C7,
C9, C11
C11
Optional.
Do not install
28.
1.0 µF Ceramic Capacitor 50 V 0805
SMT
Mouser
963-UMK212B7105KG-T
Taiyo
Yuden
1
C13
Optional.
Do not install
29.
22 µF 16 V SMT
Mouser
598-AFK226M16C12T-F
Cornell
Dubilier
1
C12
30.
100 µF 6 V SMT
Mouser
667-EEE-FPJ101UAR
Panasonic
1
C8
31.
0805 SMT
Optional
1
C4
Optional.
Do not install
32.
0805 SMT
Optional
1
C6
Optional.
Do not install
© 2014 Fairchild Semiconductor Corporation
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FEBFHR1200_SPG01A • Rev. 1.3
Item
Description
Distributor Distributor Part Number
MFG
Qty
Designator
Remarks
Transistors
33.
2N5089 NPN Transistor SOT-23
Mouser
512-MMBT5089
Fairchild
2
Q4, Q6
34.
N-Channel FET SuperSOT™-6
Mouser
512-FDN337N
Fairchild
1
Q5
1
D2
Fairchild
1
U6
Diodes & Rectifiers
35.
1 W DO-41 Zener
36.
Dual Diode Low Leakage SOT-23
Optional
512-FLLD261
Optional.
Do not install
Integrated Circuits
U1, U2, U3,
U2 Optional.
U4, U5, U9,
Do not install
U10
37.
FHR1200 Shunt Regulator SC-70
Mouser
512-FHR1200
Fairchild
7
38.
Opto Isolator, H11AG1M
Mouser
512-H11AG1M
Fairchild
1
OPTO 2
39.
Opto Isolator, FOD817D
Mouser
512-FOD817D
Fairchild
1
OPTO 1
40. NC7WZU04 Dual Inv Gate SC-70-6
Mouser
512-NC7WZU04P6X
Fairchild
1
U7
41. FAN156 Comparator MicroPak™ 6
Mouser
512-FAN156L6X
Fairchild
1
U8
TDK
1
L1
Optional.
Do not install
Optional.
Do not install
Inductor & Hardware
42.
100 µH SMT, 0.5 A, 0.25 Ω
© 2014 Fairchild Semiconductor Corporation
Mouser
810-SLF7045T-101M
29
FEBFHR1200_SPG01A • Rev. 1.3
6.
Application Circuit Tests
Six application circuits are provided to help designers understand the FHR1200 and how
it might be used in an application. The FHR1200 is very flexible and can be used in many
diverse applications. Default voltages and operating currents were selected to enable
testing, but may require adjustment for a particular application. The design formulas,
device curves, and data are supplied in this document and in the FHR1200 datasheet.
Figure 30. Connecting the Evaluation Board for Test
Figure 31. Break-Away Detail for Socket Adapters
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Figure 32. Testing the FHR1200 Devices on the Socket Adapters
Figure 33. Test of the Energy Capacitor Charger Operation
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Figure 34. Energy Capacitor Charger Circuit Operation Description
Figure 35. Voltage Regulator Circuit Checkout
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Figure 36. 3.3 V Low-Voltage Regulator Checkout
Figure 37. VCC or Brownout Regulator Circuit Checkout
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7.
Device Characteristic Data
The following section provides characterization data on the FHR1200. Please note that
the data was selected to help designers with applications. It is not a complete set of
possible curves or tables on the device. If other data is required, please feel free to ask an
FAE or sales representative.
Figure 38. Calculating the FHR1200 Reference Temperature Coefficient
Figure 39. LM431 Configured Reference Temperature Stability
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Figure 40. VREF; 10 µA, 25 µA IZ Temperature Stability: Grounded Configuration
Figure 41. VREF; 40 µA, 60 µA IZ Temperature Stability: Grounded Configuration
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Figure 42. VBE; 10 µA, 25 µA IZ Temperature Stability: Grounded Configuration
Figure 43. VBE; 40 µA, 60 µA IZ Temperature Stability: Grounded Configuration
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Table 8. VREF Temp Stability vs. IZ -55°C to +150°C: Grounded Configuration
Table 9. VREF Temperature Stability vs. IZ -40°C to +125°C: Grounded Configuration
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Figure 44. BJT hfe Variation Over Temperature
Figure 45. Zener Voltage vs. IZ vs. Temperature
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Figure 46. Zener Temperature Coefficient Change Over Temperature
Figure 47. FHR1200 Small-Signal Response
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8.
Revision History
Rev.
Date
Description
1.0.0
February 2014
Initial Release
1.3
February 2015
Updated Links
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Replace components on the Evaluation Board only with those parts shown on the parts list (or Bill of Materials) in the Users’ Guide. Contact an
authorized Fairchild representative with any questions.
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Evaluation board (or kit) is for demonstration purposes only and neither the Board nor this User’s Guide constitute a sales contract or create any kind
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