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LT1512I Datasheet

  • LT1512I

  • Linear Technology [SEPIC Constant-Current/ Constant-Voltage...

  • LINER

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LT1512
TYPICAL APPLICATION
The circuit in Figure 6 will provide adapter current limiting
to ensure that the battery charger never overloads the
adapter. In addition, it adjusts charging current to a lower
value if other system power increases to the point where
the adapter would be overloaded. This allows the LT1512
R6
0.2鈩?/div>
R5
1k
2
7
3
WALL
ADAPTER
INPUT
鈥?/div>
LM301
4
6
Q1
2N3904
R7
12k
*L1 A, L1 B ARE TWO 33碌H WINDINGS ON A
COMMON CORE: COILTRONICS CTX33-3
**TOKIN CERAMIC 1E225ZY5U-C203-F
RELATED PARTS
PART NUMBER DESCRIPTION
LT1239
LTC
廬
1325
LT1510
LT1511
LT1513
Backup Battery Management System
Microprocessor Controlled Battery Management System
1.5A Constant-Current/Constant-Voltage Battery Charger
3.0A Constant-Current/Constant-Voltage Battery Charger
with Input Current Limiting
COMMENTS
Charges Backup Battery and Regulates Backup Battery Output when
Main Battery Removed
Can Charge, Discharge and Gas Gauge NiCd, NiMH and Pb-Acid Batteries
with Software Charging Profiles
Step-Down Charger for Li-Ion, NiCd and NiMH
Step-Down Charger that Allows Charging During Computer Operation and
Prevents Wall-Adapter Overload
SEPIC Constant-Current/Constant-Voltage Battery Charger Step-Up/Step-Down Charger for Up to 2A Current
12
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
q
FAX
: (408) 434-0507
q
TELEX
: 499-3977
U
to charge the battery at the maximum possible rate without
concern about varying system power levels. The LM301 op
amp used here is unusual in that it can operate with its
inputs at a voltage equal to the positive supply voltage.
SYSTEM
POWER
鈥?/div>
L1 A*
+
+
8
D2
1N4148
C3
22碌F
25V
5
V
IN
V
SW
8
C2**
D1
2.2碌F MBRS130LT3
0.5A
L1 B*
FB
I
FB
3
2
R4
24鈩?/div>
C4
0.22碌F
R3
0.2鈩?/div>
鈥?/div>
R2
R1
1
30pF
LT1512
SYNC
4
AND/OR
S/S
SHUTDOWN
GND GND S V
C
7
TO FB PIN
6
1
+
C1
22碌F
25V
C5
0.1碌F
1512 F06
Figure 6. Adding Adapter Current Limiting
LT/GP 1096 7K 鈥?PRINTED IN THE USA
漏
LINEAR TECHNOLOGY CORPORATION 1996

LT1512I相關(guān)型號(hào)PDF文件下載

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