DC2150A Demo Manual Datasheet by Analog Devices Inc.

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l ’ LI” DEMO MANUAL DC2150A TECHNOLOGY L7HEWEAR 1
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DEMO MANUAL DC2150A
DESCRIPTION
LTC4366-2/LT4363-2
28V MIL-STD-1275D Surge Stopper
Demonstration circuit 2150A uses the LT C
®
4366-2 and
LT4363-2 surge stoppers to satisfy MIL-STD-1275D. This
specification, created by the United States Department of
Defense, sets down requirements of electrical systems
powered from a military vehicle’s 28V power supply.
DC2150A’s output voltage is limited to 44V when faced
with MIL-STD-1275D’s onerous surge, spike, and ripple
conditions. In most circumstances, satisfying MIL-STD-
1275D is as simple as placing this circuit in front of a 44V
tolerant device. The default version, DC2150A-C, provides
a minimum of 4A to the output in all conditions except the
±7V ripple condition (14Vpeak-to-peak). During the ripple
condition, DC2150A-C provides a minimum of 2.8A to the
load. Exceeding 2.8A during the input ripple condition
may cause DC2150A-C to timeout and shutoff in less than
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
PERFORMANCE SUMMARY
MIL-STD-1275D’s one minute ripple ride-through require-
ment. DC2150A’s MOSFETs are protected against output
overloads by current limiting. Sustained overvoltage or
overcurrent conditions cause the circuit to turn off after a
timer delay. It automatically retries after a cooldown cycle.
DANGER! HIGH VOLTAGE TESTING SHOULD BE
PERFORMED BY QUALIFIED PERSONNEL ONLY.
AS A SAFETY PRECAUTION AT LEAST TWO PEOPLE
SHOULD BE PRESENT DURING HIGH VOLTAGE
TESTING.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2150A
Specifications for DC2150A-C are at TA = 25°C
PARAMETER CONDITIONS MIN TYP MAX UNITS
Input Supply Operating 8 28 40 V
500ms Surge 100 V
Survival (with Optional TVS Removed) –250 250 V
Output Regulation Voltage 41 43.6 46 V
Current Limit 4.4 5 5.6 A
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DEMO MANUAL DC2150A
QUICK START PROCEDURE
Connect a 28V supply to the input and connect a load at
the output. A good output load choice is a 10Ω power
resistor rated at more than 200W. If the banana jacks are
used, no connections are necessary at the turrets. The
green LED turns on to indicate that the output is powered.
If the load at the output sinks less than 28mA, place
jumper JP1 in the 1position to preload the output (be
aware that preload resistors R34 and R35 may become
hot as they dissipate nearly 2W when the input is at 44V).
With less than 28mA of load current, MIL-STD-1275D’s
repeated 100V/50ms input surge test causes capacitors
C1-C12 to remain charged at 67V for an extended period
of time while the output voltage is regulated to 44V. This
is not harmful, but it may cause the LT4363 to timeout
and shutoff Q4.
Now, lower the input voltage to 8V. The output remains
powered. In fact, the output remains powered to even
DC2150A is available from Linear Technology as
DC2150A-C. This C version provides 4A to the load dur-
ing all conditions except the ripple condition, where 2.8A
is available to the load for up to one minute. Exceeding
2.8A during the ripple condition may cause the circuit to
timeout in less than one minute. DC2150A-C provides un-
interrupted power to the load during both the 100V/500ms
worst-case surge envelope of MIL-STD-1275D and the
repeated 100V/50ms recommended test. (Figure 1 shows
DC2150A-C riding through the 100V/500ms surge. Figure
2 shows it riding through the repeated 100V/50ms surges.
Figure 5 shows DC2150A-C providing uninterrupted power
during a ±7V input ripple event.)
Schematics and a bill of materials are provided for three
additional assembly options. Versions DC2150A-A and
DC2150A-B provide a minimum of 2A of current to the load
lower voltages, but component tolerances, especially the
MOSFET threshold voltages, prevent guaranteed opera-
tion below 8V.
Next, raise the input voltage above 50V. The output shuts
off as the circuit detects a high input voltage. Once the input
is brought back to 28V, the output power is automatically
reapplied after a cooldown timer cycle. Be patient, it can
take 30 seconds for power to be reapplied.
MIL-STD-1275D Requirements
Refer to Linear Technology Journal article, High Voltage
Surge Stoppers Ease MIL-STD-1275D Compliance by
Replacing Bulky Passive Components, and the MIL-STD-
1275D, Characteristics of 28 Volt DC Electrical Systems in
Military Vehicles, United States Department of Defense In-
terface Standard for a thorough description of requirements.
and ride through the 100V/50ms repeated surges specified
in the MIL-STD-1275D recommended tests. These versions
are not guaranteed to ride through the worst-case 500ms
envelope in the MIL-STD-1275D specifications. No dam-
age will occur, but these versions may shut off when faced
with the full 100V/500ms worst-case envelope. Versions
DC2150A-C and DC2150A-D provide at least 4A of current
to the load and ride through the 100V/50ms repeated surges
and the full worst-case 100V/500ms surge. (Refer to the
MIL-STD-1275D standard and Linear Technology Journal
article, High Voltage Surge Stoppers Ease MIL-STD-1275D
Compliance by Replacing Bulky Passive Components, for a
more thorough description of these requirements.) Versions
DC2150A-A and DC2150A-C provide 1A and 2.8A during
the ripple condition, respectively. Versions DC2150A-B
and DC2150A-D shutoff immediately when ripple occurs
on the input, but they have a reduced bill of materials cost.
ASSEMBLY OPTIONS
Table 1. DC2150A Assembly Options
STUFFING OPTION MAX LOAD MAX LOAD DURING RIPPLE
100V/50ms SURGE
(FIVE REPEATS) 100V/500ms SURGE
DC2150A-A 2A 1A Yes No
DC2150A-B 2A N/A Yes No
DC2150A-C 4A 2.8A Yes Yes
DC2150A-D 4A N/A Yes Yes
I 250v sws Rum] = ‘09 23v 27w 2 7A ‘UUV \ E“. 43v 27v _\ — 4 3A _\~_..._ 373 “LOAD = ‘09 V wuv L ‘ 31V. 27v ‘4” l J ‘V 4 3A ' r .' __1 v . 2 7A Rm“ : mu 27 27v 450v SP‘KE L7 HEW
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DEMO MANUAL DC2150A
Unless otherwise specified, the description of circuit
operation that follows applies to the default assembly
option DC2150A-C.
100V/500ms Surge
In MIL-STD-1275D, the worst-case MOSFET power dis-
sipation condition occurs during the 100V input surge.
The circuit shown in the schematic diagram regulates the
output voltage to 44V. As a result, the circuit must drop
56V from the 100V input to the 44V output. In this MIL-
STD-1275D solution, to increase power available at the
output, two series MOSFETs are used. The first MOSFET’s
(Q3’s) source is regulated to 66V by the LTC4366, while
the second MOSFET’s (Q4’s) source is regulated to 44V
by the LT4363. This reduces the power that must be dis-
sipated in either single MOSFET.
Figures 1 and 2 show the results measured during surge
testing. The oscilloscope waveform in Figure 1 shows this
circuit operating through the full 100V/500ms MIL-STD-
1275D surge requirement. Figure 2 shows this circuit
operating through the less stringent 100V/50ms pulses
described in MIL-STD-1275D’s recommended tests.
±250V Spike and Reverse Input Protection
The 250V spike condition is handled by MOSFET Q3. It
is rated to withstand over 300V from drain to source,
blocking the 250V spike condition seen at the input. MIL-
STD-1275D specifies that the input energy is limited to
15mJ which is easily handled by this MOSFET. Figure 3
shows the results of the 250V spike measured during
MIL-STD-1275D testing.
Similarly, the –250V spike test result is shown in Figure 4.
In this condition, diode D4 is reverse biased during the
–250V spike, blocking the spike from Q4 and the output.
CIRCUIT OPERATION
Figure 1. MIL-STD-1275D 100V/500ms Surge Test
Figure 2. MIL-STD-1275D 100V/50ms Surge
Repeated Five Times
100ms/DIV
VIN
20V/DIV
VOUT
20V/DIV
IOUT
2A/DIV
100V
43V
4.3A
28V
27V
2.7A
RLOAD = 10Ω
500ms/DIV
VIN
20V/DIV
VOUT
20V/DIV
IOUT
2A/DIV
28V
27V
27V
27V
2.7A
RLOAD = 10Ω
100V
43V
4.3A
Figure 3. Positive Input Spike
1µs/DIV
VIN
50V/DIV
VOUT
50V/DIV
IOUT
5A/DIV
250V SPIKE
28V
27V
2.7A
RLOAD = 10Ω
Figure 4. Negative Input Spike
1µs/DIV
VIN
50V/DIV
VOUT
50V/DIV
I
OUT
5A/DIV
−250V SPIKE
2.7A
28V
27V
RLOAD = 10Ω
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DEMO MANUAL DC2150A
CIRCUIT OPERATION
D4 additionally provides reverse polarity protection,
preventing negative input voltages from showing up at
the output. (The LTC4366 surge stopper in front of D4 is
capable of withstanding reverse voltages and the –250V
spike without additional protection.)
An optional bidirectional TVS (Transient Voltage Suppres-
sor) is present at the input to provide extra protection. Its
150V breakdown voltage does not affect circuit operation
below 100V. For applications where a TVS is not desirable
at the input, this optional component can be removed.
Note that the output voltage trace (VOUT) during the MIL-
STD-1275D spike tests in Figures 3 and 4 shows high
frequency ringing which is a measurement artifact of the
large currents that flow in supply and ground traces when
the 0.1µF test circuit capacitor is discharged directly at the
circuit input with all resistances and inductances minimized.
±7V Ripple
Satisfying the ripple specification of MIL-STD-1275D
requires several more components. Diode D4 in combi-
nation with capacitors C1-C12 form an AC rectifier. This
rectified signal appears at the RIPCAP node. The LT4363
in combination with sense resistor R3 limits the maximum
current to 5A (typical). If the rising edge of the input ripple
waveform attempts to pull up the output capacitor with
more than 5A, the LT4363 momentarily limits the current
by pulling down on Q4’s gate. To quickly restore the gate
voltage, the small charge pump formed by components
D5, D6, C24, C25, and C26 supplements the LT4363’s
internal charge pump to quickly pull up MOSFET Q4’s gate.
Even still, the available load current must be reduced to
2.8A during this ripple condition. Figure 5 shows that the
output remains powered during ripple testing.
Finally, thermal protection is implemented by components
R25, R26, R27, Q6-1, Q6-2,Q5-1 and thermistor R29. If the
temperature at Q4’s heat sink exceeds 105°C, the LT4363’s
UV pin is pulled down by Q5-1 to force off MOSFET Q4
and limit its maximum temperature.
Starting Mode Initial Engagement Surge
It should also be noted that with the specified components,
this circuit is only guaranteed to work down to a minimum
of 8V during the starting mode initial engagement surge
rather than the minimum 6V specified in MIL-STD-1275D.
DC2150A Assembly Options
Assembly options DC2150A-B and DC2150A-D eliminate
capacitors C1-C12 to reduce total solution cost. In those
assembly options, C25, C27, R31, R32, D7-1, and D7-2
inject a small current into the LT4363’s TIMER on each
rising edge of the input ripple (which appears at the
SOURCE1 node). In the face of ripple, those components
will force the LT4363 to timeout quickly and turn off Q4.
Figure 5. 14VP-P Input Ripple Condition
10ms/DIV
VIN
5V/DIV
VOUT
5V/DIV
IOUT
1A/DIV
21V
20.3V
R
LOAD
= 10Ω
34V
35V
28V
27.15V
2.715A
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DEMO MANUAL DC2150A
PCB LAYOUT
DC2150A is designed to withstand input voltages from
250V to –250V when the optional 150V bidirectional TVS
DP1 is removed. The maximum positive input voltage is
limited by the 300V BVDSS rating of the input MOSFET
(Q1 on DC2150A-A/DC2150A-B, and Q3 on DC2150A-C/
DC2150A-D). The negative input voltage is limited by the
series diode (D1 on DC2150A-A/DC2150A-B, and D4 on
DC2150A-C/DC2150A-D).
Upstream of the RIPCAP node, spacings and component
package sizes have been chosen to support the high
voltages that may be present. Traces and components
downstream of the RIPCAP node are limited to less than
67V by Q1/Q3 and the LTC4366. Negative voltages are
blocked from traces and components downstream of the
RIPCAP node by D1/D4.
Top Silkscreen
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DEMO MANUAL DC2150A
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 1 C13 CAP., X7R, 0.1µF, 100V 10% 1210 KEMET, C1210C104K1RAC7025
2 1 C14 CAP., X7R, 0.1µF, 500V 10% 1210 KEMET, C1210C104KCRACTU
3 0 C15, C28 CAP., OPT, 2220 OPTION
4 1 C17 CAP., X7R, 0.047µF, 100V 10% 0805 TDK, C2012X7R2A473K125AA
5 1 C18 CAP., ALUM., 68µF 50V 20% SMT SUN ELECT., 50CE68LX
6 1 C19 CAP., X7R, 0.1µF, 100V 10% 0805 TDK, C2012X7R2A104K125AA
7 1 C20 CAP., X7R, 0.47µF, 100V 10% 0805 AVX, 08051C474KAZ2A
8 1 C22 CAP., X7R, 1µF, 16V 10% 0805 TDK, C2012X7R1C105K085AC
9 1 C25 CAP., X7R, 1µF, 250V 10% 2220 TDK, C5750X7R2E105K230KA
10 1 DP1 DIODE, TVS, OPT., SMB VISHAY, P65MB150CA-E3/52
11 0 DP2 DIODE, TVS, OPT., SMC OPTION
12 1 D2 DIODE, SWITCHING, SOT-323 DIODES INC., BAS21W-7-F
13 1 D3 DIODE, SCHOTTKY, 30V 200mA, SOT-23 DIODES INC., BAT54-7-F
14 1 D9 LED, GREEN, DIFFUSED, 0805 AVAGO, HSMG-C170
15 4 E1, E3, E6, E7 BANANA JACK, NON-INSULATED KEYSTONE, 575-4
16 3 E2, E5, E11 TEST POINT, TURRET, 0.061, PBF MILL-MAX, 2308-2-00-80-00-00-07-0
17 4 E4, E8, E9, E10 TEST POINT, TURRET, 0.094, PBF MILL-MAX, 2501-2-00-80-00-00-07-0
18 1 JP1 HEADER, 2X2 PIN, 0.079CC SULLINS, NRPN022PAEN-RC
19 4 MP1, MP2, MP3, MP4 STANDOFF, NYLON 0.5" KEYSTONE, 8833 (SNAP ON)
20 2 Q5, Q6 TRANSISTOR, DUAL NPN, SOT-363 DIODES INC., MMDT5551-7-F
21 2 R1, R2 RES., CHIP, HIGH POWER, 100Ω, 3/4W, 5% 1210 VISHAY, CRCW1210100RJNEAHP
22 1 R4 RES., CHIP, 237k, 1/4W, 1% 1206 VISHAY, CRCW1206237KFKEA
23 1 R5 RES., CHIP, 100Ω, 1/8W, 1% 0805 YAGEO, RC0805FR-07100RL
24 1 R6 RES., CHIP, 10Ω, 1/8W, 5% 0805 VISHAY, CRCW080510R0JNEA
25 1 R7 RES., CHIP, 10k, 1/4W, 5% 1206 PANASONIC, ERJ-8GEYJ103V
26 1 R8 RES., CHIP, 30.1Ω, 1/8W, 1% 0805 VISHAY, CRCW080530R1FKEA
27 1 R9 RES., CHIP, 12.1k, 1/8W, 1% 0805 VISHAY, CRCW080512K1FKEA
28 1 R10 RES., CHIP, 1k, 1/2W, 1% 1210 VISHAY, CRCW1210KOOFKEA
29 2 R11, R13 RES., CHIP, 332k, 1/8W, 1% 0805 VISHAY, CRCW0805332KFKEA
30 1 R12 RES., CHIP, 649k, 1/4W, 1% 1206 VISHAY, CRCW1206649KFKEA
31 3 R14, R26, R27 RES., CHIP, 301k, 1/8W, 1% 0805 VISHAY, CRCW0805301KFKEA
32 2 R15, R19 RES., CHIP, 10k, 1/8W, 1% 0805 VISHAY, CRCW080510K0FKEA
33 3 R16, R17, R18 RES., CHIP, 18.2k, 1/2W, 1% 1210 VISHAY, CRCW121018K2FKEA
34 1 R20 RES., CHIP, 100k, 1/8W, 1% 0805 VISHAY, CRCW0805100KFKEA
35 0 R23 RES., CHIP, OPT, 0805 OPTION
36 1 R28 RES., CHIP, 1k, 1/8W, 5% 0805 NIC, NRC10J102TRF
37 1 R33 RES., CHIP, 9.31k, 1/2W, 1% 1210 PANASONIC, ERJ-14NF9311U
PARTS LIST
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DEMO MANUAL DC2150A
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
38 2 R34, R35 RES., CHIP, 2k, 1W, 1% 2010 VISHAY, CRCW20102K00FKEFHP
39 0 R36 RES., CHIP, 10M, 1/4W, 5% 1206, OPTION PANASONIC, ERJ-8GEYJ106V (OPTION)
40 1 U1 IC, HIGH VOLTAGE SURGE STOPPER, TS8 LINEAR TECH., LTC4366HTS8-2#TRMPBF
41 1 U2 IC, HIGH VOLTAGE SURGE STOPPER WITH CURRENT
LIMIT, SOIC
LINEAR TECH., LT4363HS-2#PBF
42 1 XJP1 SHUNT, 2mm SAMTEC, 25N-BK-G
DC2150A-A Required Circuit Components
1 1 DC2150A DC2150A GENERAL BOM
2 12 C1-C12 CAP., X7S, 10µF, 100V 20% 2220 TDK, C5750X7S2A106M230KB
3 1 C16 CAP., X7R, 0.022µF, 100V 10% 1206 KEMET, C1206C223K1RACTU
4 1 C21 CAP., X7R, 0.22µF, 25V 10% 0805 KEMET, C0805C224K3RACTU
5 0 C23, C27 NOT USED
6 2 C24, C26 CAP., X7R, 1µF, 250V 10% 2220 TDK, C5750X7R2E105K230KA
7 1 D1 DIODE ARRAY, TO-263 VISHAY, UHB20FCT-E3/4W
8 0 D4, D7, D8 NOT USED
9 2 D5, D6, D10 DIODE ARRAY, SOT23 DIODES INC., MMBD3004S-7-F
10 0 HS1, HS2, HS3 NOT USED
11 1 Q1 TRANS., MOSFET N-CH., 300V, TO-263 IXYS, IXTA36N30P
12 1 Q2 TRANS., MOSFET N-CH., 75V, TO-263 FAIRCHILD, FDB045AN08A0
13 0 Q3, Q4 NOT USED
14 1 R3 RES., CHIP, CURRENT SENSE, 0.020Ω, 1/2W, 1% 1206 IRC, LRC-LRF-1206LF-01-R020F
15 1 R21 RES., CHIP, 5.6M, 1/8W, 5% 0805 PANASONIC, ERJ-6GEYJ565V
16 1 R22 RES., CHIP, 0Ω, 1/8W, 0805 YAGEO, RC0805JR-070RL
17 1 R24 RES., CHIP, 20k, 1/8W, 5% 0805 VISHAY, CRCW080520K0JNEA
18 1 R25 RES., CHIP, 4.75k, 1/8W, 1% 0805 VISHAY, CRCW08054K75FKEA
19 1 R30 THERMISTOR, PTC, 470Ω , 0603 EPCOS, B59601A0105A062
20 0 R29, R31, R32 NOT USED
PARTS LIST
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DEMO MANUAL DC2150A
PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
DC2150A-B Required Circuit Components
1 1 DC2150A DC2150A GENERAL BOM
2 0 C1-C12 NOT USED
3 1 C16 CAP., X7R, 0.022µF, 100V 10% 1206 KEMET, C1206C223K1RACTU
4 1 C21 CAP., X7R, 0.22µF, 25V 10% 0805 KEMET, C0805C224K3RACTU
5 0 C23, C24, C26 NOT USED
6 1 C27 CAP., X7R, 0.033µF, 16V 10% 0805 KEMET, C0805C333K4RACTU
7 1 D1 DIODE ARRAY, TO-263 VISHAY, UHB20FCT-E3/4W
8 0 D4, D5, D6, D10 NOT USED
9 1 D7 DIODE ARRAY, SOT23 CENTRAL SEMI., CMPSH-3SE
10 1 D8 DIODE, ZENER 3.3V 500mW SOD-123 DIODES INC., MMSZ5226B-7-F
11 0 HS1, HS2, HS3 NOT USED
12 1 Q1 TRANS., MOSFET N-CH., 300V, TO-263 IXYS, IXTA36N30P
13 1 Q2 TRANS., MOSFET N-CH., 75V, TO-263 FAIRCHILD, FDB045AN08A0
14 0 Q3, Q4 NOT USED
15 1 R3 RES., CHIP, CURRENT SENSE, 0.020Ω, 1/2W, 1% 1206 IRC, LRC-LRF-1206LF-01-R020F
16 0 R21, R22, R24, R29 NOT USED
17 1 R25 RES., CHIP, 4.75k, 1/8W, 1% 0805 VISHAY, CRCW08054K75FKEA
18 1 R30 THERMISTOR, PTC, 470Ω , 0603 EPCOS, B59601A0105A062
19 1 R31 RES., CHIP, 10k, 1/2W, 5% 1210 PANASONIC, ERJ-14YJ103U
20 1 R32 RES., CHIP, 100k, 1/8W, 5% 0805 YAGEO, RC0805JR-07100KL
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DEMO MANUAL DC2150A
PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
DC2150A-C Required Circuit Components
1 1 DC2150A DC2150A GENERAL BOM
2 12 C1-C12 CAP., X7S, 22µF, 100V 20% 2220 TDK, CKG57NX7S2A226M500JH
3 1 C16 CAP., X7R, 0.015µF, 100V 10% 1206 KEMET, C1206C153K1RACTU
4 1 C21 CAP., X7R, 2.2µF, 25V 10% 0805 TDK, CGA4J3X7R1E225K125AB
5 1 C23 CAP., X7R, 10µF, 16V 10% 0805 SAMSUNG, CL21B106KOQNNNE
6 2 C24, C26 CAP., X7R, 1µF, 250V 10% 2220 TDK, C5750X7R2E105K230KA
7 0 C27 NOT USED
8 0 D1, D7, D8 NOT USED
9 1 D4 DIODE ARRAY, TO-247 VISHAY, FEP30GP-E3/45
10 3 D5, D6, D10 DIODE ARRAY, SOT23 DIODES INC., MMBD3004S-7-F
11 3 HS1, HS2, HS3 HEATSINK, VERTICAL MOUNT ASSMANN WSW COMPONENTS, V8813X
12 0 Q1, Q2 NOT USED
13 1 Q3 TRANS., MOSFET N-CH., 300V, TO-3P IXYS, IXTQ88N30P
14 1 Q4 TRANS., MOSFET N-CH., 100V, TO-3P IXYS, IXTQ170N10P
15 1 R3 RES., CHIP, CURRENT SENSE, 0.010Ω, 1/2W, 1% 1206 IRC, LRC-LRF-1206LF-01-R010F
16 1 R21 RES., CHIP, 5.6M, 1/8W, 5% 0805 PANASONIC, ERJ-6GEYJ565V
17 1 R22 RES., CHIP, 6.19k, 1/8W, 1% 0805 VISHAY, CRCW08056K19FKEA
18 1 R24 RES., CHIP, 20k, 1/8W, 5% 0805 VISHAY, CRCW080520K0JNEA
19 1 R25 RES., CHIP, 1k, 1/8W, 1% 0805 VISHAY, CRCW08051K00FKEA
20 1 R29 THERMISTOR, PTC, 100Ω, RADIAL LEAD EPCOS, B59901D100A40
21 0 R30, R31, R32 NOT USED
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DEMO MANUAL DC2150A
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
DC2150A-D Required Circuit Components
1 1 DC2150A DC2150A GENERAL BOM
2 0 C1-C12, C24, C26 NOT USED
3 1 C16 CAP., X7R, 0.015µF, 100V 10% 1206 KEMET, C1206C153K1RACTU
4 1 C21 CAP., X7R, 2.2µF, 25V 10% 0805 TDK, CGA4J3X7R1E225K125AB
5 1 C23 CAP., X7R, 10µF, 16V 10% 0805 SAMSUNG, CL21B106KOQNNNE
6 1 C27 CAP., X7R, 0.033µF, 16V 10% 0805 KEMET, C0805C333K4RACTU
7 0 D1, D5, D6, D10 NOT USED
8 1 D4 DIODE ARRAY, TO-247 VISHAY, FEP30GP-E3/45
9 1 D7 DIODE ARRAY, SOT23 CENTRAL SEMI., CMPSH-3SE
10 1 D8 DIODE, ZENER 3.3V 500mW SOD-123 DIODES INC., MMSZ5226B-7-F
11 3 HS1, HS2, HS3 HEATSINK, VERTICAL MOUNT ASSMANN WSW COMPONENTS, V8813X
12 0 Q1, Q2 NOT USED
13 1 Q3 TRANS., MOSFET N-CH., 300V, TO-3P IXYS, IXTQ88N30P
14 1 Q4 TRANS., MOSFET N-CH., 100V, TO-3P IXYS, IXTQ170N10P
15 1 R3 RES., CHIP, CURRENT SENSE, 0.010Ω, 1/2W, 1% 1206 IRC, LRC-LRF-1206LF-01-R010F
16 1 R22 RES., CHIP, 6.19k, 1/8W, 1% 0805 VISHAY, CRCW08056K19FKEA
17 1 R25 RES., CHIP, 1k, 1/8W, 1% 0805 VISHAY, CRCW08051K00FKEA
18 1 R29 THERMISTOR, PTC, 100Ω, RADIAL LEAD EPCOS, B59901D100A40
19 1 R31 RES., CHIP, 10k, 1/2W, 5% 1210 PANASONIC, ERJ-14YJ103U
20 1 R32 RES., CHIP, 100k, 1/8W, 5% 0805 YAGEO, RC0805JR-07100KL
21 0 R21, R24, R30 NOT USED
PARTS LIST
Es. E55 5.13! :35! Easy. 11 L7 LJUW
11
dc2150af
DEMO MANUAL DC2150A
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
SCHEMATIC DIAGRAM
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
2 PRODUCTION
DAN EDDLEMAN
04/25/2014
-
RIPCAP
R29 AFFIXED TO HS3
GND
OUTPUT
GND
SOURCE1
INPUT
GND
STANDOFFS, 4 PLCS
OUTPUT
FLT
INPUT
GND
-D
ASSEMBLY TYPES
-A
-B
-C
STUFFING
OPTION
I
L
2A
2A
4A
4A
MAX LOAD
DURING
RIPPLE
1A
N/A
2.8A
N/A
5X
100V/50ms
SURGE
100V/500ms
SURGE
MIL-STD-1275D
HIGH VOLTAGE THIS SIDE
M.HAWKINS
DAN
EDDLEMAN
04/25/2014
1. FOR COMPONENTS DESIGNATED WITH *, REFER
TO BOM FOR APPROPRIATE PART NUMBER
FOR EACH ASSEMBLY TYPE.
LTC4366HTS8-2
1K
NONE
PRELOAD
NOTES:
2. ALL RESISTORS ARE 0805 PACKAGE U.O.N.
(OPTION)
INPUT
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
1 1
N/A
DEMO CIRCUIT 2150A
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
1 1
N/A
DEMO CIRCUIT 2150A
SIZE
DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: (408)434-0507
Milpitas, CA 95035
Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
1 1
N/A
DEMO CIRCUIT 2150A
R26
301K
R26
301K
E6E6
R6
10 OHM
R6
10 OHM
C8*
C8*
E5E5
C21*
C21*
D7*
D7*
3
2
1
E11E11
C25
1.0uF
C25
1.0uF
R10
1K 1210
R10
1K 1210
E7E7
E1E1
D1*D1*
3
1
2
Q3*
Q3*
2
1
3
R21*R21*
R5
100
R5
100
C1*
C1*
LT4363HS-2
U2
LT4363HS-2
U2
TIMER
15
VCC 6
GATE 4
SNS 2
NC
7
FLT 12
OV
9
OUT 1
FB 16
ENOUT 13
NC
14 NC
5NC
3
GND
11
UV
10
SHDN
8
R15
10K
R15
10K
C9*
C9*
R27
301K
R27
301K
E4E4
C24*
C24*
R1
100
1210
R1
100
1210
R23
OPT
R23
OPT
R13
332K
R13
332K
E8E8
C2*
C2*
D9
GREEN
D9
GREEN
21
R16
18.2K
1210
R16
18.2K
1210
C10 *
C10 *
R8 30.1R8 30.1
R34
2K
2010
R34
2K
2010
C26*
C26*
D4*
D4*
2
3
1
T
R30*
0603
T
R30*
0603
C19
0.1uF
C19
0.1uF
C22
1.0uF
C22
1.0uF
R11
332K
R11
332K
D8 *
D8 *
1
2
TP1TP1
R25 *R25 *
R32 *
R32 *
C3*
C3*
Q4 *
Q4 *
2
1
3
C15
OPT
2220
C15
OPT
2220
C11*
C11*
HS2*HS2*
1
2
R17
18.2K
1210
R17
18.2K
1210
E2E2
HS3*
HS3*
1
2
JP1JP1
1
3 4
2
Q1*
Q1*
3
1
2
R12
649K
1206
R12
649K
1206
C4*
C4*
LTC4366HTS8-2
U1
LTC4366HTS8-2
U1
TIMER
3VDD 1
GATE 8
OUT 7
VSS
4
BASE
5
SHDN
2FB 6
+
C18
68uF
+
C18
68uF
HS1*
HS1*
1
2
C12 *
C12 *
D10 *D10 *
3
2
1
R31*
1210
R31*
1210
R9
12.1K
R9
12.1K
R18
18.2K
1210
R18
18.2K
1210
D3
BAT54
D3
BAT54
1 3
MP2MP2
D5 *
D5 *
3
2
1
C13 0.1uFC13 0.1uF
R3 *
1206
R3 *
1206
D2
BAS21W
D2
BAS21W
13
DP2
OPT
DP2
OPT
2 1
TP3TP3
Q2 *
Q2 *
3
1
2
C5*
C5*
R4
237K
1206
R4
237K
1206 C16*
C16*
Q6-1Q6-1
34
5
Q5-1Q5-1
34
5
R19
10K
R19
10K
C23 *
C23 *
R7
10K
1206
R7
10K
1206
MP3MP3
C6*
C6*
R35
2K
2010
R35
2K
2010
R24 *R24 *
R36
10M
1206
R36
10M
1206
R14
301K
R14
301K
E3E3
E10E10
MP4MP4
T
R29*
THRU-HOLE
T
R29*
THRU-HOLE
R22 *
R22 *
C20
0.47uF
C20
0.47uF
C28
OPT
2220
C28
OPT
2220
R20
100K
R20
100K
C27*
C27*
C17 0.047uFC17 0.047uF
R33
9.31K
1210
R33
9.31K
1210
D6 *
D6 *
3
2
1
C7*
C7*
C14 0.1uFC14 0.1uF
Q6-2Q6-2
61
2
R2
100
1210
R2
100
1210
Q5-2Q5-2
61
2
DP1
TVS
DP1
TVS
2 1
E9E9
R28
1K
R28
1K
MP1MP1
TP4TP4
TP2TP2
12 L7LJCUEN2
12
dc2150af
DEMO MANUAL DC2150A
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 FAX: (408) 434-0507 www.linear.com
LINEAR TECHNOLOGY CORPORATION 2014
LT 0714 • PRINTED IN USA
DEMONSTRATION BOARD IMPORTANT NOTICE
Linear Technology Corporation (LT C ) provides the enclosed product(s) under the following AS IS conditions:
This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT
OR EVALUATION PURPOSES ONLY and is not provided by LT C for commercial use. As such, the DEMO BOARD herein may not be complete
in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety
measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union
directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations.
If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date
of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU
OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS
FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR
ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LT C from all claims
arising from the handling or use of the goods. Due to the open construction of the product, it is the users responsibility to take any and all
appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or
agency certified (FCC, UL, CE, etc.).
No License is granted under any patent right or other intellectual property whatsoever. LT C assumes no liability for applications assistance,
customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.
LT C currently services a variety of customers for products around the world, and therefore this transaction is not exclusive.
Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and
observe good laboratory practice standards. Common sense is encouraged.
This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LT C applica-
tion engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation

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