Linear Technology DC2181A-A, Demo Manual

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11
dc2181afb
DEMO MANUAL
DC2181A-A/B
schematic Diagram
4 4
3 3
2 2
1 1
4
4
3
3
2
2
1
1
UNLESS NOTED: RESISTORS: OHMS, 0402, 1%, 1/16W CAPACITORS: uF, 0402, 10%, 50V
OPT
EXT
1.5 MHz
INT
400mA
2.7 V - 4.2V
750 kHz
1210
R10 TO BE CONNECTED TO " BAT " NODE AT BAT TURRET (E4)
-B
ASSY
*
-A
1.40MEG
0 Ohm
OPEN
R10
R9
1.05MEG
LTC4120EUD - 4.2 LTC4120EUD
U1
RUN FOR VIN > 11V
OPT
OPT
J2
NOTE: PCB AE1 CONNECTS TO J1 AND J2
J1
FIGURE 1.
AE1
DO *NOT* INSTALL R36 AND R37 SIMULTANEOUSLY
INTVCC
INTVCC
INTVCC
VBAR
VPROG
SIZE DATE:
.V
ER
.O
N
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
CUST
OMER 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
3
DEMO CIRCUIT 2181A - A / B
1
2
400mA WIRELESS SYNCHRONOUS BUCK BATTERY CHARGER
N/A
LTC4120EUD - 4.2 / LTC4120EUD
NC
GEORGE B.
7 - 17 - 14
SIZE DATE:
.V
ER
.O
N
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
CUST
OMER 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
3
DEMO CIRCUIT 2181A - A / B
1
2
400mA WIRELESS SYNCHRONOUS BUCK BATTERY CHARGER
N/A
LTC4120EUD - 4.2 / LTC4120EUD
NC
GEORGE B.
7 - 17 - 14
SIZE DATE:
.V
ER
.O
N
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
CUST
OMER 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
3
DEMO CIRCUIT 2181A - A / B
1
2
400mA WIRELESS SYNCHRONOUS BUCK BATTERY CHARGER
N/A
LTC4120EUD - 4.2 / LTC4120EUD
NC
GEORGE B.
7 - 17 - 14
REVISION HISTORY
DESCRIPTION
DATE
APPROVED
ECO
REV
GEORGE B.
PRODUCTION
41 -
7
1 -
7
3
-
REVISION HISTORY
DESCRIPTION
DATE
APPROVED
ECO
REV
GEORGE B.
PRODUCTION
41 -
7
1 -
7
3
-
REVISION HISTORY
DESCRIPTION
DATE
APPROVED
ECO
REV
GEORGE B.
PRODUCTION
41 -
7
1 -
7
3
-
D1 DFLS240L
E7
GND
C5 10µF 50V
E5
CHRG
C3 0.01µF 0603
L1
15.0uH
R4 2.0k
5%
C2S1 4700pF 5% 50V 0805
E4
BAT
C1 10uF 16V 0805
R6 0
R10
*
U1 LTC4120EUD-4.2 / LTC4120EUD
RUN
16
PROG
13
INTVCC
1
GND
5
NTC
12
GND
17
BAT
9
IN
3
DHC
6
BATSNS/FB
10
FREQ
7
BOOST
2
SW
4
CHGSNS
8
FAULT
15
CHRG
14
NC/FBG
11
R37 0
E8
12V - 40V
VIN
E2
PROG
R8 0
R9
*
GND
J2
E6
FAULT
R5 3.01k
R2 412k
R36 0
R11 100k 5%
D2 DFLS240L
R1 1.40MEG
E1
NTC
C2S2 0.022µF 5% 50V 0805
E3
GND
R12 100k 5%
R7 10k
C2 47uF 16V 1210
D3 DFLS240L
C4 2.2µF 6.3V
C2P2 1800pF 5% 50V 0603
R3 10k
C2P1 4700pF 5% 50V 0805
J3
DF3-3P-2DSA
BAT
1
GND
2
ENTC
3
Cx
J1
39V D4 DFLZ39
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