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參數(shù)資料
| 型號： | 4060EFE |
| 廠商： | Linear Integrated Systems |
| 英文描述： | Standalone Linear NiMH/NiCd Fast Battery Charger |
| 中文描述： | 獨(dú)立線性鎳氫/鎳鎘電池快速充電器 |
| 文件頁數(shù)： | 9/20頁 |
| 文件大?。?/td> | 195K |
| 代理商： | 4060EFE |
17
LTC4060
4060f
Trickle Charge
The trickle charge function is normally not required due to
the automatic recharge feature. However, the LTC4060
does provide a modest pull-up current (IBRD) as part of its
battery removal detection method. If additional current is
required for trickle charge or to support battery removal
detection with current loads greater than IBRD, then the
simple circuit of Figure 4 will facilitate that. The diode
insures no reverse discharge current when VIN is removed
and the resistor sets the trickle current.
Extending Charge Current
Extending the charge current beyond 2A can be accom-
plished by paralleling an external current sense resistor,
RISET, with the internal current sense resistor as shown in
Figure 5. Bond wire, lead frame and PCB interconnect
resistance and mismatches in the two sense resistor’s
value will cause charge current variability to increase in
proportion to the extension in current. Resistor RISET
should be connected directly to the LTC4060 to reduce
errors. The total current sense resistor, bond wire and lead
frame resistance is approximately 0.08 (T.C. 3500ppm/
°C). The formula for extended fast charge current is:
II
R
AA
MAX EXT
MAX
ISET
()
.
=+
==
1
008
21 5
3
for RISET = 0.16 and RPROG = 698.
Adequate PNP beta is required to meet the DRIVE pin
capability and the increased PNP power dissipation will
require additional heat sinking.
TYPICAL APPLICATIO S
U
VCC
VIN
1N4001
LTC4060
SENSE
DRIVE
4060 F04
2-CELL
NiMH
BATTERY
3.3k
3
14
1
2
+
VCC
VIN
LTC4060
SENSE
DRIVE
BAT
4060 F05
2-CELL
NiMH
BATTERY
RISET
0.16
0.08
3
14
1
2
+
Figure 4. Adding Trickle Charge
Figure 5. Extended Charge Current Operation
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 40659 | 2.5 mm2, BRASS, RING TERMINAL |
| 40696 | 6 mm2, RING TERMINAL |
| 40696-2 | RING TERMINAL |
| 40696-1 | RING TERMINAL |
| 406C31GFREQ | QUARTZ CRYSTAL RESONATOR, 10 MHz - 50 MHz |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 4060-F | 制造商:Brady Corporation 功能描述: |
| 4060FI | 制造商:MALLORY 制造商全稱:MALLORY 功能描述:ELECTRIC FUEL PUMP |
| 4060-G | 制造商:Brady Corporation 功能描述: |
| 4060GB | 制造商:Greenlee Textron Inc 功能描述: |
| 4060-H | 制造商:Brady Corporation 功能描述: |
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