1
dc2006abfa
DEMO MANUAL DC2006A-B
Description
LTC3862-2
High Power, High Voltage
Step-Up Converter
Demonstration circuit 2006A-B is a multiphase high power,
high voltage step-up DC/DC converter featuring two the
LT C
®
3862-2 boost controllers. This demo board converts
a 6V to 36V input voltage to a 120V output at up to 2.0A
with two stages. The first stage converts the input voltage
to 50V. The second stage converts the 50V to 120V and
each stage uses one LTC3862-2.
The DC2006A-B supports three ways of biasing the
LTC3862-2 controllers IC’s by directly from the input
voltage, or from a low power switching power supply or
from an LDO regulator.
An onboard SEPIC power supply can provide a stable 10V
bias voltage for both LTC3862-2 controllers over the wide
varying input voltage. This allows the use of either logic
level or standard level MOSFETs, even when the input
voltage drops below the 10V set-point, which is useful in
wide varying input applications.
An onboard LDO regulator can be selected for biasing the
LTC3862-2 controllers which simplifies the design and is
useful in applications where the input voltage is always
higher than the required gate drive voltage. 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
The LTC3862-2 is a multiphase step-up (boost) DC/DC
controller that delivers high output power in a compact
footprint. Up to 12 power stages can be paralleled and
clocked out-of-phase to minimize input and output filtering
requirements. It has a 5.5V to 36V input voltage range and
an output voltage range that is dependent on the choice
of external components.
The LTC3862-2 utilizes peak current mode architecture for
easy loop compensation and multiphase operation with
very accurate phase-to-phase current matching. The fixed
operating frequency can be set with a single resistor over
a 75kHz to 500kHz range or can be synchronized to an
external clock over a 50kHz to 600kHz frequency range.
A current sense resistor is used in each phase to provide
a precise cycle-by-cycle current limit. The powerful on-
board gate drivers minimize switching losses and allow
the use of multiple MOSFETs in parallel for very high
current applications.
Design files for this circuit board are available at
http://www.linear.com/demo
PARAMETER CONDITIONS VALUE UNITS
Minimum Input Supply Voltage 6 V
Maximum Input Supply Voltage 36 V
Output Voltage Range VIN = 6V to 36V, IOUT1 = 0A to 2.0A 120 ±2% V
Typical switching frequency 200 kHz
Typical Output Ripple (VOUT, 120V) ILOAD = 1.0A 150 mV
Efficiency Typical (VOUT, 120V, VIN 14V) See Figure 3 93 %
2
dc2006abfa
DEMO MANUAL DC2006A-B
Quick start proceDure
Demonstration circuit 2006 is easy to set up to evaluate
the performance of the LTC3862-2 controllers. Refer to
Figure 1 for proper measurement equipment setup and
follow the procedure below:
NOTE. When measuring the input or output voltage ripple,
care must be taken to avoid a long ground lead on the
oscilloscope probe. Measure the input or output voltage
ripple by touching the probe tip directly across the VIN or
VOUT and GND terminals. See Figure 2 for proper scope
probe technique.
1. Place jumper RUN1 (JP11) in the ON position. Place
jumper RUN2 (JP10) in ON position also.
2. Place jumper BIAS (JP12) to the VIN position.
3. With power off, connect the input power supply to VIN
and GND.
Turn the input power source on and slowly increase the
input voltage. Be careful not to exceed 36V.
NOTE: Make sure that the input voltage VIN does not ex-
ceed 36V. If higher operating voltage is required, power
components with higher voltage ratings should be used.
4. Check for the proper output voltage of 120V. If there is
no output, temporarily disconnect the load to make sure
that the load is not set too high. Take all the precautions
needed to work with high 120V output voltage.
5. Once the proper output voltages are established, adjust
the load within the operating range and observe the
output voltage regulation, ripple voltage, efficiency and
other parameters.
LTC3862-2 BIAS CIRCUITS
The demo board DC2006A supports three ways of biasing
LTC3862-2 controllers. Place jumper BIAS (JP12) to the
VIN position for input voltage above 10V, but below 36V.
In this case bias pins of LTC3862-2 controllers will be
connected directly to the input voltage.
Place jumper BIAS (JP12) to the AUX position for input volt-
age that can drop below 10V. The bias pins of LTC3862 -2
controllers will be connected directly to the low power
SEPIC converter, which provides regulated 10V.
The demo board DC2006A can be used for higher than 36V
input voltages. In that case, the bias power for LTC3862 -2
has to be limited under 36V. An external power source can
be used to accomplish this or the optional bias regulator
can be used. Remove R44 and R47 resistors and install
0Ω resistors R44 and R42.
Place jumper BIAS (JP12) to the AUX position. Since the
power dissipation in linear regulator Q17 depends on the
size of MOSFETs, switching frequency and voltage differ-
ence across Q17, all of the factors need to be considered
when selecting the appropriate device for Q17. Please
refer to LTC3862-2 data sheet.
CONVERTER EFFICIENCY
DC2006A-B efficiency reaches 92% at 12V input voltage
generating 120V at 2.0A and 93% at 14V input voltage,
see Figure 3. However, output current should be decreased
at input voltages below 11V to reduce thermal stress on
the converter. Figure 4 demonstrates maximum output
current, as function of input voltage, assuming 120V
output voltage.
All measurements were conducted at room temperature,
natural convection cooling with no air flow.
3
dc2006abfa
DEMO MANUAL DC2006A-B
Quick start proceDure
40V DC
POWER SUPPLY +
–
– +
VOUT
LOAD
+ –
+
–
Figure 1. Proper Measurement Equipment Setup
4
dc2006abfa
DEMO MANUAL DC2006A-B
Quick start proceDure
GND
VIN
Figure 2. Measuring Input or Output Ripple
Figure 3. DC2006A-B, Efficiency vs Load
Figure 4. Load Current Derating at Low Input Voltages
(A)
0.5
86
(%)
93
92
91
90
89
88
87
94
1.5 1.7 1.90.7 0.9 1.1
DC2006 F03
1.3
36VIN
24VIN
14VIN
12VIN
INPUT VOLTAGE (V)
6
MAXIMUM LOAD CURRENT (A)
2.5
0.5
1.5
2
1
09 1110
12
8
DC2006AB F04
7
5
dc2006abfa
DEMO MANUAL DC2006A-B
Quick start proceDure
Figure 4. Installing Through-Hole MOSFETs and Heat Sink on
Second Stage; AAVID TECH., 578622B03200G Heat Sink is Used
6
dc2006abfa
DEMO MANUAL DC2006A-B
parts List
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 2 CC1, CC2 Cap., NPO 220pF, 25V, 5%, 0603 MURATA, CGM1885C1H221JA16D
2 1 CIN1 Cap., Alum 220µF, 50V 12.8 × 12.8 SUN ELECT., 50CE220KX
3 6 CIN3-CIN8 Cap., X5R 10uF, 50V, 20%, 1812 TDK, CKG45NX5R1H106M
3 7 COUT1-COUT4, COUT7, COUT15,
COUT16
Cap., X7S 4.7µF, 100V, 10%, 1812 TDK, C4532X7S2A475K
4 5 COUT8-COUT11, COUT14 Cap., X7T 0.47µF, 450V, 1812 TDK C4532X7T2W474M
5 2 COUT5, COUT6 Cap., Alum. Elect. 100µF, 63V SUN ELECT., 63CE100KX
6 2 COUT12, COUT13 Cap., Alum. 100µF, 160V, 20% PANASONIC EEV-EB2C101M
6 5 C1, C8, C10, C17, C28 Cap., X7R 0.1µF, 25V, 10%, 0603 AVX, 06033C104KAT2A
7 2 C6, C15 Cap., X7R 0.47µF, 16V, 10%, 0603 AVX, 0603YC474KAT2A
8 2 C2, C12 Cap., NPO 1nF, 25V, 5%, 0603 AVX, 06033A102JAT2A
9 8 C3, C7, C9, C11, C16, C20, C22, C26 Cap., X7R 10nF, 25V, 5%, 0603 AVX, 06033C103JAT2A
10 3 C4, C13, C33 Cap., X5R 1µF, 50V, 10%, 1206 MURATA, GRM188R61H105KAAL
11 1 C18 Cap., X5R 1µF, 25V, 10%, 0603 AVX,06033D105KAT2A
12 1 C19 Cap., Polymer, 15uF, 25V Panasonic,25TQC15MYFB
13 1 C21 Cap., X7S 2.2µF, 100V, 10%, 1206 TDK, C3216X7S2A225M
14 2 C24, C31 Cap., X7R 2.2µF, 25V, 20%, 0805 AVX, 08053C225MAT2A
15 2 C5, C14 Cap., X5R 4.7µF, 50V, 10%, 1206 TAIYO YUDEN, UMK316BJ475KL-T
16 4 D1, D4, D5, D8 Diode Schottky, SOD-323 DIODES/ZETEX, BAT760-7
17 2 D2, D11 Diode Schottky 8Amp 100V VISHAY, V8P10-M3
18 2 D12, D13 Super Barrier Rectifier, 10A, 200V PWRD15 DIODES/ZETEX, SBR10U200P5-13
19 1 D16 Volt. Reg. Diode 12V SOD-323 NXP SEMI., PDZ12B
20 1 D15 Diode Schottky 1A, 60V DIODES INC. PD3S160-7
21 1 D14 Diode Zener 7.5V NXP/ PHILIPS PDZ7.5B
22 1 D17 Diode, 100V, SOD523 NXP/ PHILIPS BAS516
23 4 Q3, Q4, Q7, Q8 NPN/PNP Transistor NXP SEMI., PBSS4140DPN
23 2 Q2, Q6 MOSFET 75V INFINEON, BSC036NE7NS3G
24 2 Q10, Q14 MOSFET 150V INFINEON, BSC190N15NS3G
25 1 Q16 MOSFET, 60V FAIRCHILD, FDC5612
26 1 Q17 Transistor, SOT223 NXP SEMI., PZTA42
27 1 Q12 Transistor, SOT-23 DIODES, MMBTA42-7-F
28 2 L1, L2 INDUCTOR, 10µH COILCRAFT, SER2918H-103KL
29 2 L6, L7 INDUCTOR, 100µH COILCRAFT, PCV-2-104-05L
30 1 T2 Dual Winding Inductor, 100µH COOPER BUSSMANN, DRQ73-101-R
31 7 R37, R14, R35, R47, R21, R22, R39 Res., Chip 0Ω, Jumper 0603 VISHAY, CRCW06030000Z0EA
32 4 RS2, RS3, RS6, RS8 Res., 0.004Ω, 1/2W, 1%, 2010 VISHAY, WSL20104L000FEA
33 1 R1 Res., Chip 84.5k, 1%, 0805 VISHAY, CRCW080584K5FKEA
34 4 R2, R12, R20, R29 Res., Chip 10Ω, 5%, 0603 VISHAY, CRCW060310R0JNEA
35 1 R45 Res., Chip 402Ω, 1%, 0603 VISHAY,CRCW0603402RFKEA
36 3 R5, R19, R9 Res., Chip 21k, 1%, 0603 VISHAY, CRCW060321K0FKEA
7
dc2006abfa
DEMO MANUAL DC2006A-B
parts List
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
37 2 R7, R24 Res., Chip 66.5k, 1%, 0603 VISHAY, CRCW060366K5FKEA
38 2 R10, R27 Res., Chip 11.8k, 1%, 0603 VISHAY, CRCW060311K8FKEA
39 1 R11 Res., Chip 475k, 1%, 1206 VISHAY, CRCW1206475KFKEA
39 1 R16 Res., Chip 665k, 1%, 0805 VISHAY, CRCW0805665KFKEA
40 1 R26 Res., Chip 31.6k, 1%, 0603 VISHAY, CRCW06031K6FKEA
39 1 R28 Res., Chip 1.15M, 1%, 1206 VISHAY, CRCW12061M15FKEA
40 1 R34 Res., Chip 100k, 1%, 0603 VISHAY, CRCW0603100KFKEA
41 2 R46, R31 Res., Chip 10k, 1%, 0603 VISHAY, CRCW060310K0FKEA
42 1 R32 Res., Chip 0.1Ω, 1%, 0603 VISHAY, WSL0603R1000FEA
43 1 R50 Res., Chip 8.66k, 1%, 0603 VISHAY, CRCW06038K66FKEA
44 1 R23 Res., Chip 1M, 1%, 0603 VISHAY, CRCW06031M00FKEA
45 1 R44 Res., Chip 12.1k, 1%, 0603 VISHAY,,CRCW060312K1FKEA
46 1 R3 Res., Chip 3.32k, 1%, 1206 VISHAY,CRCW12063K32FKEA
47 1 R41 Res., Chip 10k, 1%, 1206 VISHAY,CRCW120610K0FKEA
48 1 R40 Res., Chip 115k, 1%, 0603 VISHAY, CRCW0603115K0FKEA
49 1 R38 Res., Chip 3.01k, 1%, 0603 VISHAY, CRCW06033K01FKEA
50 2 U1, U2 IC., LTC3862EUH-2#PBF, 5mm × 5mm, QFN LINEAR TECH, LTC3862EUH-2#PBF
51 1 U3 IC., LTC3805-5 LINEAR TECH, LTC3805EMSE-5#TRMPBF
Additional Demo Board Circuit Components
1 R4, R8, R15, R25, R26, R30, R42 OPT
2 C16, C29, C30 OPT
3 D3, D6, D7, D10 OPT
4 Q1, Q5, Q9, Q13 OPT
5 HS1, HS2 OPTIONAL Heat Sink AAVID TECH., 578622B03200G
Hardware
1 10 E1-E10 TESTPOINT, TURRET, .094" MILL-MAX, 2501-2-00-80-00-00-07-0
24 J1, J2, J3, J4 CONN, BANANA JACK, KEYSTONE-575-4 KEYSTONE 575-4
3 1 JP1 JMP, 3 PIN, 1 ROW, 0.079" SULLINS, NRPN031PAEN-RC
4 1 JP2 JMP, 3 PIN, 2 ROW, 0.079" SULLINS, NRPN032PAEN-RC
6 4 MTGS at 4 corners STANDOFF, NYLON .5 1/2" KEYSTONE, 8833(SNAP-ON)
5 2 XJP1, XJP2 SHUNT, .079" CENTER SAMTEC, 2SN-BK-G
6 2 J1, J2 Broaching Studs, .625 × 0.250 PennEngineering, KFH-032-10ET
7 2 J1, J2 Nut Brass, #10-32 M/S BR PL ANY 10-32
8 2 J1, J2 Ring, Lug #10 KEYSTONE, 8205
9 2 J1, J2 Washer #10, Tin Plated Brass ANY #10EXT BZ TN
8
dc2006abfa
DEMO MANUAL DC2006A-B
schematic Diagram
A
A
B
B
C
C
D
D
E
E
4
4
3
3
2
2
1
1
LTC3862EUH-2
6V - 36V
100V 100V 100V 100V
LTC3862EUH-2
VICTOR K.
BLANK SLOPE DMAXPHASE
1.0**
0.625
1.66
75%
84%**
96%
325ns
250ns**
175ns
120°
180°
BLANK SLOPE
DMAX
PHASE
1.0**
0.625
1.66
75%
84%**
96%
325ns
250ns**
175ns
120°
180°
RUN2
ON
OFF
OFF
RUN1
ON
100V
OPT
OPT
6V - 36V
50V 50V 50V 50V 50V 50V
450V 450V 450V 450V 450V 160V 160V
INTVCC
INTVCC1
INTVCC1
INTVCC
INTVCC1
+VIN
+VIN
VBIAS
+VIN
VOUT1
+VIN
VOUT2
VBIAS
+VINVOUT1
VOUT2
VOUT1
VOUT1 VOUT2
+VIN
SYNC_AUX
INTVCC
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
VICTOR K.PRODUCTION
27-3-13
__
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
VICTOR K.PRODUCTION
27-3-13
__
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
VICTOR K.PRODUCTION
27-3-13
__
SIZE
DATE:
.VER.ON CI
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
Wednesday, September 25, 2013
1 2
HIGH POWER, HIGH VOLTAGE STEP-UP CONVERTER
HZ
N/A
LTC3862EUH-2
DEMO CIRCUIT 2006A-B
SIZE
DATE:
.VER.ON CI
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
Wednesday, September 25, 2013
1 2
HIGH POWER, HIGH VOLTAGE STEP-UP CONVERTER
HZ
N/A
LTC3862EUH-2
DEMO CIRCUIT 2006A-B
SIZE
DATE:
.VER.ON CI
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
Wednesday, September 25, 2013
1 2
HIGH POWER, HIGH VOLTAGE STEP-UP CONVERTER
HZ
N/A
LTC3862EUH-2
DEMO CIRCUIT 2006A-B
R9 21kR9 21k
JP9JP9
1
2
3
JP11JP11
1
2
3
E9
+VIN
E9
+VIN
CIN9
OPT
CIN9
OPT
C14 4.7uFC14 4.7uF
L6 100uHL6 100uH
JP4JP4
1
2
3
CC1
220pF
CC1
220pF
COUT11
0.47uF
COUT11
0.47uF
R10 11.8kR10 11.8k
D4
BAT760
D4
BAT760
2 1
E8
SYNC2
E8
SYNC2
RS2
4m
RS2
4m
L3 OPTL3 OPT
+
COUT6
100uF
63V
+
COUT6
100uF
63V
J8
GND
J8
GND
D6
OPT
D6
OPT
2
1
3
R11
475k
R11
475k
C13
1uF
C13
1uF
COUT9
0.47uF
COUT9
0.47uF
Q7
PBSS4140DPN
Q7
PBSS4140DPN
1
2
3
4
5
6
C11
10nF
C11
10nF
U1U1
BLANK
1
PHASEMODE
2
FREQ
3
SS
4
ITH
5
FB
6
SGND
7
CLKOUT
8
SYNC
9
PLLFLTR
10
SENSE2+ 11
SENSE2- 12
NC 13
GATE2 14
PGND 15
GATE1 16
INTVCC 17
VIN 18
RUN 19
SENSE1- 20
SENSE1+ 21
3V8 22
DMAX
23
SLOPE
24
GND
25
R5
21k
R5
21k
C30
OPT
C30
OPT
C8
0.1uF
C8
0.1uF
C12 1nFC12 1nF
E6
SYNC1
E6
SYNC1
R29 10R29 10
R17
OPT
R17
OPT
Q14
BSC190N15NS3G
Q14
BSC190N15NS3G
2
4
5
3
1
RS1
OPT
RS1
OPT
C5 4.7uFC5 4.7uF
E10
GND
E10
GND
Q1
OPT
Q1
OPT
2
4
5
3
1
Q8
PBSS4140DPN
Q8
PBSS4140DPN
1
2
3
4
5
6
J5
VOUT2
J5
VOUT2
E5
GND
E5
GND
D1
BAT760
D1
BAT760
2 1
C710nF C710nF
C20
10nF
C20
10nF
CIN3
10uF
CIN3
10uF
J1
+VIN
J1
+VIN
D12
SBR10U200P
D12
SBR10U200P
2
1
3
CC2
220pF
CC2
220pF
R21 0R21 0
JP10JP10
1
2
3
+
COUT12
100uF
+
COUT12
100uF
C9
10nF
C9
10nF
R15 OPTR15 OPT
TP1
CLKOUT2
TP1
CLKOUT2
COUT7
4.7uF
COUT7
4.7uF
COUT8
0.47uF
COUT8
0.47uF
D5
BAT760
D5
BAT760
2 1
RS3
4m
RS3
4m
Q5
OPT
Q5
OPT
2
4
5
3
1
R28
1.15Meg
R28
1.15Meg
L1
10uH
L1
10uH
R27 11.8kR27 11.8k
Q6
BSC036NE7NS3G
Q6
BSC036NE7NS3G
2
4
5
3
1
J3
VOUT1
J3
VOUT1
E12
GND
E12
GND
JP7JP7
1
2
3
R20 10R20 10
D10
OPT
D10
OPT
2
1
3
C1
0.1uF
C1
0.1uF
Q13
OPT
Q13
OPT
2
4
5
3
1
Q3
PBSS4140DPN
Q3
PBSS4140DPN
1
2
3
4
5
6
CIN5
10uF
CIN5
10uF
R16
665K
R16
665K
C4 1uFC4 1uF
RS4
OPT
RS4
OPT
D13
SBR10U200P
D13
SBR10U200P
2
1
3
E14 GND
E14 GND
RS6
4m
RS6
4m
CIN10
OPT
CIN10
OPT
R12 10R12 10
D11
V8P10
D11
V8P10
2
1
3
R39 0R39 0
C17
0.1uF
C17
0.1uF
JP5JP5
1
2
3
RS7
OPT
RS7
OPT
RS8
4m
RS8
4m
D3
OPT
D3
OPT
2
1
3
C6 0.47uFC6 0.47uF
+
CIN2
OPT
+
CIN2
OPT
C29
OPT
C29
OPT
E11
VOUT1
E11
VOUT1
R24 66.5kR24 66.5k
JP3JP3
1
2
3
Q4
PBSS4140DPN
Q4
PBSS4140DPN
1
2
3
4
5
6
R7 66.5kR7 66.5k
COUT2
4.7uF
COUT2
4.7uF
C16
10nF
C16
10nF
E7
GND
E7
GND
COUT4
4.7uF
COUT4
4.7uF
R14 0R14 0
COUT3
4.7uF
COUT3
4.7uF
R1
84.5k
R1
84.5k
HEAT SINK
G1 S1 D1 D2S2G2
HS1
HEAT SINK
G1 S1 D1 D2S2G2
HS1
3
2
1
4
6
5
R22 0R22 0
HEAT SINK
G1S1D1D2 S2 G2
HS2
HEAT SINK
G1S1D1D2 S2 G2
HS2
3
2
1
4
6
5
COUT1
4.7uF
COUT1
4.7uF
J2
GND
J2
GND
J6
GND
J6
GND
R2 10R2 10
CIN8
10uF
CIN8
10uF
CIN7
10uF
CIN7
10uF
C22 10nFC22 10nF
L7 100uHL7 100uH
R25 OPTR25 OPT
J7
+VIN
J7
+VIN
CIN6
10uF
CIN6
10uF
R31 10KR31 10K
C15 0.47uFC15 0.47uF
Q2
BSC036NE7NS3G
Q2
BSC036NE7NS3G
2
4
5
3
1
C2 1nFC2 1nF
JP6JP6
1
2
3
RS5
OPT
RS5
OPT
R37 0R37 0
D2
V8P10
D2
V8P10
2
1
3
L4 OPTL4 OPT
J4
GND
J4
GND
U2U2
BLANK
1
PHASEMODE
2
FREQ
3
SS
4
ITH
5
FB
6
SGND
7
CLKOUT
8
SYNC
9
PLLFLTR
10
SENSE2+ 11
SENSE2- 12
NC 13
GATE2 14
PGND 15
GATE1 16
INTVCC 17
VIN 18
RUN 19
SENSE1- 20
SENSE1+ 21
3V8 22
DMAX
23
SLOPE
24
GND
25
+
COUT13
100uF
+
COUT13
100uF
CIN4
10uF
CIN4
10uF
+
COUT5
100uF
63V
+
COUT5
100uF
63V
C10
0.1uF
C10
0.1uF
R19
21k
R19
21k
R13 OPTR13 OPT
Q10
BSC190N15NS3G
Q10
BSC190N15NS3G
2
4
5
3
1
Q9
OPT
Q9
OPT
2
4
5
3
1
JP8JP8
1
2
3
R26 31.6KR26 31.6K
D7
OPT
D7
OPT
2
1
3
R35 0R35 0
COUT10
0.47uF
COUT10
0.47uF
R30 OPTR30 OPT
D8
BAT760
D8
BAT760
2 1
JP2JP2
1
2
3
C3
10nF
C3
10nF
COUT14
0.47uF
COUT14
0.47uF
+
CIN1
220uF
50V
+
CIN1
220uF
50V
L2
10uH
L2
10uH
E13 VOUT2
E13 VOUT2
R18 OPTR18 OPT
R8 OPTR8 OPT
Figure 5. DC2006A-B Dual Stage Boost Converter
9
dc2006abfa
DEMO MANUAL DC2006A-B
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
A
A
B
B
C
C
D
D
E
E
4
4
3
3
2
2
1
1
BIAS
50V
0805
+VIN
+VIN
VBIAS
+VIN
SYNC_AUX
SIZE
DATE:
.VER.ON CI
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
Thursday, September 26, 2013
2 2
HIGH POWER, HIGH VOLTAGE STEP-UP CONVERTER
HZ
N/A
LTC3862EUH-2
DEMO CIRCUIT 2006A-B
SIZE
DATE:
.VER.ON CI
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
Thursday, September 26, 2013
2 2
HIGH POWER, HIGH VOLTAGE STEP-UP CONVERTER
HZ
N/A
LTC3862EUH-2
DEMO CIRCUIT 2006A-B
SIZE
DATE:
.VER.ON CI
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
Thursday, September 26, 2013
2 2
HIGH POWER, HIGH VOLTAGE STEP-UP CONVERTER
HZ
N/A
LTC3862EUH-2
DEMO CIRCUIT 2006A-B
D16
PDZ12B
D16
PDZ12B
21
Q12
MMBTA42
Q12
MMBTA42
32
1
R40
115k
R40
115k
D17 BAS516D17 BAS516
1 2
R23
1Meg
R23
1Meg
D15
PD3S160
D15
PD3S160
C28 0.1uFC28 0.1uF
R34
100K
R34
100K
JP12
VIN
AUX
JP12
VIN
AUX
1
3
2
R41
10K
R41
10K
R32
0.1
R32
0.1
R3
3.32K
R3
3.32K
C18
1uF
16V
C18
1uF
16V
R45 402R45 402
U3
LTC3805EMSE-5
U3
LTC3805EMSE-5
SSFLT
1
ITH
2
FB
3
RUN
4
FS
5SYNC 6
ISENSE 7
OC 8
VCC 9
Gate 10
GND
11
C31
2.2uF
C31
2.2uF
R46
10k
R46
10k
Q17
PZTA42
Q17
PZTA42
1
32
4
R50
8.66K
R50
8.66K
C24
2.2uF
C24
2.2uF
+
C19
15uF
+
C19
15uF
C21
2.2uF
1206
C21
2.2uF
1206
C26
10nF
C26
10nF
Q16
FDC5612
Q16
FDC5612
2
1
3
4
5
6
T2
DRQ73-101-R
T2
DRQ73-101-R
4
21
3
R42 OPTR42 OPT
R44
12.1K
R44
12.1K
D14
PDZ7.5B
D14
PDZ7.5B
2 1
R38
1k
R38
1k
R47
0
R47
0
C33
1uF
C33
1uF
R4
OPT
R4
OPT
Figure 6. DC2006A-B Bias Circuitry
10
dc2006abfa
DEMO MANUAL DC2006A-B
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
LINEAR TECHNOLOGY CORPORATION 2013
LT 0415 REV A • 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
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