參數(shù)資料
型號(hào): LTC4011EFE#PBF
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: BATTERY CHARGE CONTROLLER, 615 kHz SWITCHING FREQ-MAX, PDSO20
封裝: 4.40 MM, PLASTIC, TSSOP-20
文件頁(yè)數(shù): 1/24頁(yè)
文件大小: 228K
代理商: LTC4011EFE#PBF
1
LTC4011
4011p
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
High Efficiency Standalone
Nickel Battery Charger
Complete NiMH/NiCd Charger for 1 to 16 Cells
No Microcontroller or Firmware Required
550kHz Synchronous PWM Current Source Controller
No Audible Noise with Ceramic Capacitors
PowerPath
TM Control Support
Programmable Charge Current: 5% Accuracy
Wide Input Voltage Range: 4.5V to 34V
Automatic Trickle Precharge
–V Fast Charge Termination
Optional T/t Fast Charge Termination
Automatic NiMH Top-Off Charge
Programmable Timer
Automatic Recharge
Multiple Status Outputs
Micropower Shutdown
20-Lead Thermally Enhanced TSSOP Package
Integrated or Standalone Battery Charger
Portable Instruments or Consumer Products
Battery-Powered Diagnostics and Control
Back-Up Battery Management
PowerPath is a trademark of Linear Technology Corporation.
The LTC
4011 provides a complete, cost-effective nickel
battery fast charge solution in a small package using few
external components. A 550kHz PWM current source
controller and all necessary charge initiation, monitoring
and termination control circuitry are included.
The LTC4011 automatically senses the presence of a DC
adapter and battery insertion or removal. Heavily dis-
charged batteries are precharged with a trickle current.
The LTC4011 can simultaneously use both –V and T/t
fast charge termination techniques and can detect various
battery faults. If necessary, a top-off charge is automati-
cally applied to NiMH batteries after fast charging is
completed. The IC will also resume charging if the battery
self-discharges after a full charge cycle.
All LTC4011 charging operations are qualified by actual
charge time and maximum average cell voltage. Charging
may also be gated by minimum and maximum tempera-
ture limits. NiMH or NiCd fast charge termination param-
eters are pin-selectable.
Integrated PowerPath control support ensures that the
system remains powered at all times without allowing load
transients to adversely affect charge termination.
FEATURES
DESCRIPTIO
U
APPLICATIO S
U
TYPICAL APPLICATIO
U
INFET
FAULT
CHRG
TOC
READY
VCC
TGATE
VCDIV
VCELL
VTEMP
LTC4011
DCIN
TIMER
GND
CHEM
VRT
INTVDD
SENSE
BAT
FROM
ADAPTER
4.5V TO 34V
10H
10F
TO
SYSTEM
LOAD
0.05
2-CELL
NiMH PACK
WITH 10k NTC
(2AHr)
4011 TA01a
3k
20k
49.9k
10k
10.7k
0.1F
0.033F
0.068F
10F
30.9k
BGATE
PGND
2A NiMH Battery Charger
TIME (MINUTES)
0
1.25
CELL
VOLTAGE
(V)
BATTERY
TEMPERATURE
(
°C)
1.30
1.40
1.45
1.50
1.60
4011 TA01b
1.35
1.55
28
30
34
36
38
42
32
40
100
20
60
80
SINGLE CELL
VOLTAGE
CHARGE
CURRRENT
BATTERY
TEMPERATURE
2A
1A
TOP OFF
Typical NiMH Charge Cycle at 1C
Electrical Specifications Subject to Change
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