DEMO MANUAL DC1614A
LTC4012
High Current High Efficiency
Multi-Chemistry Battery Charger
with PowerPath Control
compatible with this charger. The optional DC1223A-B
SMBus-to-RS232 Serial port adapter and associated
software can be used to monitor a smart battery for dem-
onstration purposes only. Contact your Linear Technology
representative to order a DC1223A-B.
DC1614 features an optional circuit for sealed lead acid
(SLA) batteries for constant-voltage charging with tem-
perature compensation and fast/float voltage toggling.
DC1614 also features layout for extra components and
external gate drivers for improved efficiency at higher
charge currents.
This demo board is capable of supporting the LTC4012 and
LTC4012-3 with a simple IC swap-out. See the Schematic
Diagram.
Design files for this circuit board are available at
http://www.linear.com/demo
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
PowerPath is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
DESCRIPTION
Demonstration circuit 1614 features the LTC4012CUF a
,
multi-chemistry single battery charger controller with
PowerPath™ control. The input supply voltage is 13.5V to
20V and is initially configured for a current limit of 10A.
The charger float voltage is programmed by jumpers to
support 1- to 4- series cells of both Li-Ion/Polymer and
Li-iron phosphate (LiFePO
4
) at 4.2V/cell and 3.6V/cell,
for a total of eight settings. The demo board is initially
configured for constant-voltage charging of a 12.6V Li-Ion/
Polymer battery and constant-current charging at 8A,
though current derating may be necessary due to certain
operating conditions.
Charging can be enabled/disabled by properly setting
the shutdown jumper. LED indicators for
CHG, ICL, ACP,
and C/10 display the current state of the charger system.
Although this charger is not a smart battery charger, a
popular smart battery connector is provided that can be
used for further data-logging with the optional DC1223A-B
demo board and software. Note that a smart battery is not
required to use this board; however, smart batteries are
PERFORMANCE SUMMARY
PARAMETER
Minimum Input Voltage
Maximum Input Voltage
Input Current Limit
Default Float Voltage V
BAT
Maximum Charge Current
CONDITIONS
Specifications are at T
A
= 25°C.
VALUE
13.5V
MIN
When Using 12.6V Li-Ion/Polymer. Recommend 15V
20V
10A
DC
±4%
12.6V ±1%
8A
DC
±5%
V
IN
> V
BAT
Float Voltage
Limited by Input Capacitor Voltage Rating
Set by R1 (100mV/R1)
Jumper Selectable: 4.2V/Cell or 3.6V/Cell
V
IN
> V
BAT
dc1614af
1
DEMO MANUAL DC1614A
QUICK START PROCEDURE
Demonstration circuit 1614 is easy to set up to evaluate
the performance of LTC4012. Refer to Figure 1 for proper
measurement equipment setup and follow the procedure
below.
1. With all power off, connect an input power supply
capable of more than 10A, system load, battery, and
meters as shown in Figure 1. Preset the load to 0A and
V
IN
to 0V, 0A current limit. The input supply voltage
must
be greater than the full voltage value of the battery
to allow a full charge to take place.
2. Connect the jumpers as shown below for normal LED-
indicated operation:
JP2
Shutdown
THM
JP3
V
CC
Select
INT
JP4
Internal V
CC
ON
JP5
LED PWR
ON
7. Turn the load on and adjust as necessary. At 10A input,
the input current will limit and the ICL LED will turn
on. Note that above a certain load setting, depending
on your V
IN
and battery voltage, the charger will start
to decrease charge current until the system load is
consuming all of the current from the input. For 15V
input and 12.6V
BAT
setting this will occur at about 3.3A.
8. Optionally evaluate the SLA circuit, removing the
jumper on JP1, as well as R14. The voltage feedback
network can now be customized to match the battery
manufacturer’s specifications. The SLA circuit can be
found in the bottom left-hand corner on the top side
of the board.
9. Optionally use the provided DC1223A-B demonstra-
tion software to configure and communicate with the
DC1614A, connecting DC1223A-B as in Figure 1.
10. For improved efficiency at high charge currents, install
additional MOSFETs in Q8 and Q10 positions and/or
gate driver circuit transistors and supply capacitors
in Q7, Q9, C21, and C25. These components may be
installed on the bottom side of the board.
3. Connect the system load to V
OUT
and GND terminals.
4. Connect the jumper JP1 for the specific battery to be
tested.
5. Turn the input power supply on, setting the current limit
up to 10A. Adjust the voltage to the desired value, up
to 20V.
6. Plug in the battery. An industry-standard 5-pin AMP
smart battery connector is provided for convenience.
The board will automatically charge a battery upon
insertion and detection of a thermistor. Optionally
set jumper JP2 to ON to charge a battery without a
thermistor.
dc1614af
2
DEMO MANUAL DC1614A
QUICK START PROCEDURE
OPTIONAL
DC1223
+
LOAD
INPUT
SUPPLY
+
–
+
–
–
V
BAT
–
OPTIONAL
BATTERY
CONNECTION
+
BATTERY
–
+
Figure 1. Proper Measurement Equipment Setup
LTC4012 Basic Efficiency
100
99
98
EFFICIENCY (%)
EFFICIENCY (%)
97
96
95
94
93
92
91
90
0
1
2
3
5
4
I
BAT
(A)
6
7
8
9
24V
IN
18V
IN
15V
IN
LTC4012 Enhanced Efficiency with Drivers
100
99
98
97
96
95
94
93
92
91
90
0
1
2
3
5
4
I
BAT
(A)
6
7
8
9
24V
IN
18V
IN
15V
IN
12.6V
BAT
EXT. GATE DRIVERS DISABLED (R9 = R12 = 0)
Q2 = Q3 = RJK0305DPB
Q1 = Si7129DN
dc1614a F02a
12.6V
BAT
EXT. GATE DRIVERS DISABLED (R9 = R12 = 2Ω)
Q2 = Q3 = Q8 = Q10 = RJK0305DPB
Q1 = Si7129DN
dc1614a F02b
Figure 2. Efficiency Comparison with and without External Gate Drivers at 15V
IN
, 18V
IN
, and 24V
IN
dc1614af
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DEMO MANUAL DC1614A
PARTS LIST
ITEM
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
QTY
3
1
8
1
1
1
1
1
1
1
4
1
1
1
1
1
1
2
1
1
1
1
1
2
1
1
1
0
1
2
2
0
0
2
0
2
2
REFERENCE
C5, C6, C12
C7
C8, C9, C10, C11, C16, C17, C18, C19
C13
C15
C20
D1
D2
L1
Q1
Q2, Q3
R1
R3
R8
R10
R13
R14
R15, R16
R19
U1
C1
C2
C14
C21, C25
C22
C23
C24
D3
D4
D5, D8
D6, D7
L2
L3
Q4, Q16
Q5, Q6
Q7, Q9
Q8, Q10
PART DESCRIPTION
REQUIRED CIRCUIT COMPONENTS:
Capacitor, 0.1μF 50V, 10% 0603
,
Capacitor, 2.2μF 16V, 20% 0805
,
Capacitor, 10μF 25V, 20% 1206
,
Capacitor, 0.1μF 16V, 10% 0402
,
Capacitor, 4.7nF 50V, 10% 0402
,
Capacitor, 10pF 50V, ±0.5% 0402
,
Diode Schottky, 30V, SOD-323
Diode Schottky, 40V/3A
Inductor, 2.2μH
MOSFET P-Channel, 30V, PowerPAK1212-8
MOSFET N-Channel, 30V/10A
Resistor, 0.010Ω, 1W, 1% 2512
Resistor, 5.1k, 1/16W, 1% 0603
Resistor, 6.04k, 1/16W, 1% 0402
Resistor, 0.012Ω, 1W, 1% 2512
Resistor, 27.4k, 1/16W, 1% 0402
Resistor, 184k, 1/16W, 0.25% 0402
Resistor, 3.01k, 1/16W, 1% 0402
Resistor, 19.6k, 1/16W, 0.25% 0402
I.C. Battery Charger QFN (20) (UF) 4mm
×
4mm
ADDITIONAL CIRCUIT COMPONENTS:
Capacitor, 10μF 35V, 20% CAP-CE-5X6.0
,
Capacitor, 0.1μF 50V, % 0603
,
Capacitor, 0402 Optional
Capacitor, 0.1μF 16V, 10% 0402
,
Capacitor, 1μF 25V, 10% 1206
,
Capacitor, 0.1μF 50V, 10% 0603
,
Capacitor, 10μF 16V, 20% 3528
,
Diode Schottky Rectifier, 40V/5A Powermite 3
Diode Zener, 18V, SOD-323
Diode (Green)
Diode (Yellow)
Inductor, IHLP5050 Optional
Inductor, CEP125 Optional
MOSFET N-Channel, SOT23
MOSFET P-Channel, 30V, PowerPAK1212-8
XSTR., 12V NPN/PNP SOT23-6
MOSFET N-Channel, 30V/10A
Zetex 2N7002
Vishay Si7129DN-T1-GE3 #PbF
Diode Inc ZXTC2063E6
Renesas RJK0305DPB-00-J0
Diodes Inc., MMSZ5248BS
Panasonic LN1351C-(TR) PBF
Panasonic LN1451C-(TR) PBF
TDK C1005X7R1C104K
AVX 12063C105KAT
TDK C1608X7R1H104K
AVX TAJB106M016
Sanyo 35CE10AX
TDK C1608X7R1H104K
TDK C1608X7R1H104K
TDK C2012X5R1C225M
Taiyo Yuden TMK316BJ106ML
TDK C1005X7R1C104K
TDK C1005X7R1H472K
TDK C1005C0G1H100D
Central Semi. CMDSH-3TR
ON Semiconductor MBRS340T3
Vishay IHLP-2525CZ-01 2R2uH
Vishay Si7129DN-T1-GE3 #PbF
Renesas RJK0305DPB-00-J0
IRC LR2512-01-R010-F
Vishay CRCW06035K10FKEA
Vishay CRCW04026K04FKEA
IRC LR2512-01-R012-F
Vishay CRCW040227K4FKEA
NIC Comp NTR-04C1843DTRF
Vishay CRCW04023K01FKEA
NIC Comp NTR-04C1962DTRF
Linear Technology LTC4012CUF
MANUFACTURER/
PART NUMBER
dc1614af
4
DEMO MANUAL DC1614A
PARTS LIST
ITEM
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
1
2
3
4
5
6
7
8
9
10
QTY
1
1
3
1
0
1
1
3
1
3
1
1
1
1
1
1
1
1
1
1
1
4
0
1
1
1
3
5
6
1
1
13
0
4
REFERENCE
Q11
Q12
Q13, Q14, Q15
Q17
RT1
R2
R4
R5, R6, R30
R7
R9, R12, R43
R17
R18
R20
R21
R22
R23
R24
R25
R26
R27
R31
R32, R33, R34, R35
R36, R37, R38, R40, R41, R42
U2
JP1
JP2
JP3, JP4, JP5
XJP1, XJP2, XJP3 ,XJP4, XJP5
J1, J2, J3, J4, J5, J6
J7
P1
TP1, TP2, TP3, TP4, TP5, TP6, TP7,
TP8, TP9, TP10, TP11, TP12, TP13
THERM1, THERM2, TP14
PART DESCRIPTION
MOSFET P-Channel, 30V, PowerPAK1212-8
Transistor, SOT-323
MOSFET P-Channel, SOT23
MOSFET N-Channel, 20V SC-75
Thermistor, 0603 Optional
Resistor, 10k, 1/16W, 1% 0603
Resistor, 165k, 1/16W, 1% 0402
Resistor, 100k, 1/16W, 1% 0402
Resistor, 10Ω, 1/16W, 5% 0603
Resistor, 0Ω, 1/16W, 1A 0603
Resistor, 74.1k, 1/16W, 0.25% 0402
Resistor, 30.9k, 1/16W, 0.25% 0402
Resistor, 14.3k, 1/16W, 0.25% 0402
Resistor, 93.1k, 1/16W, 0.25% 0402
Resistor, 37k, 1/16W, 0.25% 0402
Resistor, 23.2k, 1/16W, 0.25% 0402
Resistor, 16.9k, 1/16W, 0.25% 0402
Resistor, 232Ω, 1/16W, 1% 0402
Resistor, 499k, 1/16W, 1% 0603
Resistor, 10Ω, 1/16W, 5% 0603
Resistor, 28k, 1/16W, 1% 0603
Resistor, 300Ω, 1/16W, 5% 0603
Resistor, 0603 Optional
I.C., Voltage Regulator DFN (06) (DC) 2mm
×
2mm
HARDWARE-FOR DEMO BOARD ONLY:
Headers, Double-Row, 2mm
×
8mm, 2mm Centers
Headers, Double-Row, 2mm
×
3mm, 2mm Centers
Headers, Single-Row, 3 Pins, 2mm Centers
Shunt, 2mm Centers
Connector, Banana Jack
Connector, AMP-787441-1
Connector DB, R-Angle Female 15-pin
Turret, Test Point MM/2308
Turret, Test Point MM/2308 Optional
Stand-Off, Nylon 0.5" tall
Samtec TMM-108-02-L-D
Samtec TMM-103-02-L-D
Samtec TMM-103-02-L-S
Samtec 2SN-BK-G
Keystone 575-4
Amp Inc. 787441-1
Amp 1-1734530-3
Mill Max 2308
Mill Max 2308
Keystone, 8833 (Snap On)
Linear Technology LT3008EDC-5
NIC Comp NCR06F1002TRF
Vishay CRCW0402165KFKEA
AAC, CR05-104JM
Vishay CRCW060310R0JNEA
Vishay CRCW06030000ZEA
NIC Comp NTR-04C7412DTRF
NIC Comp NTR-04C3092DTRF
NIC Comp NTR-04C1432DTRF
NIC Comp NTR-04C9312DTRF
NIC Comp NTR-04C3702DTRF
NIC Comp NTR-04C2322DTRF
NIC Comp NTR-04C1692DTRF
Vishay CRCW0402232RFKED
Vishay CRCW0603499KFKEA
AAC, CR05-104JM
Vishay CRCW060328K0FKEA
AAC CR16-301JM
MANUFACTURER/
PART NUMBER
Vishay Si7129DN-T1-GE3 #PbF
On Semi., MMBT3906WT1G
Siliconix TP0610T
Philips Semi. (NXP) PMR280UN
dc1614af
5
微控制器 MCU
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