參數(shù)資料
型號(hào)： LTC4010CFE#PBF
廠商： LINEAR TECHNOLOGY CORP
元件分類(lèi)： 穩(wěn)壓器
英文描述： High Efficiency Standalone Nickel Battery Charger; Package: TSSOP; No of Pins: 16; Temperature Range: 0°C to +70°C
中文描述： BATTERY CHARGE CONTROLLER, 615 kHz SWITCHING FREQ-MAX, PDSO16
封裝： 4.40 MM, LEAD FREE, EXPOSED PAD, PLASTIC, TSSOP-16
文件頁(yè)數(shù)： 8/24頁(yè)
文件大?。?/td> 212K
代理商： LTC4010CFE#PBF
16
LTC4010
4010fa
Cell Voltage Network Design
An external resistor network is required to provide the
average single-cell voltage to the VCELL pinoftheLTC4010.
The proper circuit for multicell packs is shown in Figure
3. The ratio of R2 to R1 should be a factor of (n – 1), where
n is the number of series cells in the battery pack. The
value of R1 should be between 1k and 100k. This range
limits the sensing error caused by VCELL leakage current
and prevents the ON resistance of the internal NFET
between VCDIV and GND from causing a significant error
in the VCELL voltage. The external resistor network is also
used to detect battery insertion and removal. The filter
formed by C1 and the parallel combination of R1 and R2
is recommended for rejecting PWM switching noise. The
value of C1 should be chosen to yield a 1st order lowpass
APPLICATIO S I FOR ATIO
WU
UU
Figure 3. Multiple Cell Voltage Divider
10
7
BAT
LTC4010
R2
+
FOR TWO OR
MORE SERIES CELLS
R1
C1
R2 = R1(n – 1)
4010 F03
VCDIV
GND
6
4
VCELL
Table 2. LTC4010 Charging Parameters
CHEM
BAT
STATE
PIN
CHEMISTRY TIMER
TMIN
TMAX
ICHRG
TERMINATION CONDITION
PC
Both
tMAX/12
5
°C45°CIPROG/5
Timer Expires
FC
Open
NiCd
tMAX
5
°C60°CIPROG
–20mV per Cell or 2
°C/Minute
GND
NiMH
tMAX
5
°C60°CIPROG
1.5
°C/Minute for First tMAX/12 Minutes if Initial
VCELL < 1.325V
–10mV per Cell or 1
°C/Minute After tMAX/12 Minutes
or if Initial VCELL > 1.325V
TOC
GND
NiMH
tMAX/3
5
°C60°CIPROG/10 Timer Expires
AR
Both
5
°C45°C0
VCELL < 1.325V
PC: Precharge
FC: Fast Charge (Initial –
V Termination Hold Off of tMAX/12 Minutes May Apply)
TOC: Top-Off Charge (Only for NiMH
T/t FC Termination After Initial tMAX/12 Period)
AR: Automatic Recharge (Temperature Limits Apply to State Termination Only)
Table 3. LTC4010 Time Limit Programming Examples
FAST CHARGE
TOP-OFF
TYPICAL FAST
PRECHARGE LIMIT
VOLTAGE STABILIZATION
FAST CHARGE LIMIT
CHARGE
RTIMER
CHARGE RATE
(MINUTES)
(HOURS)
(MINUTES)
24.9k
2C
3.8
0.75
15
33.2k
1.5C
5
1
20
49.9k
1C
7.5
1.5
30
66.5k
0.75C
10
2
40
100k
C/2
15
3
60
frequency of less than 500Hz. In the case of a single cell,
the external application circuit shown in Figure 4 is
recommended to provide the necessary noise filtering
and missing battery detection.
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