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参数资料
| 型号： | LT1510CS8#TR |
| 厂商： | Linear Technology |
| 文件页数： | 11/16页 |
| 文件大小： | 0K |
| 描述： | IC CHARGER BATT CONST V/I 8SOIC |
| 标准包装： | 2,500 |
| 功能： | 充电管理 |
| 电池化学： | 锂离子，镍镉，镍氢 |
| 电源电压： | 6.2 V ~ 28 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 带卷 (TR) |
LT1510/LT1510-5
APPLICATIO N S I N FOR M ATIO N
of the battery, canceling part or all of the 200 μ A. Note that
if net current is into the battery and the battery is removed,
the charger output voltage will float high, to near input
voltage. This could be a problem when reinserting the
battery, if the resulting output capacitor/battery surge
current is high enough to damage either the battery or the
capacitor.
If net current into the battery must be less than zero in
shutdown, there are several options. Increasing divider
current to 300 μ A - 400 μ A will ensure that net battery
current is less than zero. For long term storage conditions
however, the divider may need to be disconnected with a
MOSFET switch as shown in Figures 2 and 5. A second
option is to connect a 1N914 diode in series with the
MOSFET drain. This will limit how far the V C pin will be pulled
down, and current ( ≈ 700 μ A) will flow into the BAT pin, and
period, after which the LT1510 can be shut down by
pulling the V C pin low with an open collector or drain.
Some external means must be used to detect the need for
additional charging if needed, or the charger may be
turned on periodically to complete a short float-voltage
cycle.
Current trip level is determined by the battery voltage, R1
through R3, and the internal LT1510 sense resistor
( ≈ 0.18 ? pin-to-pin). D2 generates hysteresis in the trip
level to avoid multiple comparator transitions.
Nickel-Cadmium and Nickel-Metal-Hydride Charging
The circuit in Figure 6 uses the 8-pin LT1510 to charge
NiCd or NiMH batteries up to 12V with charging currents
of 0.5A when Q1 is on and 50mA when Q1 is off.
therefore out of the battery. This is not usually a problem
unless the charger will remain in the shutdown state with
input power applied for very long periods of time.
C1 D1
0.22 μ F 1N5819
SW
V CC
+
C IN *
10 μ F
D3
1N5819
WALL
ADAPTER
4.2V
–
R5
4.2V
LT1510
–
V IN
1 μ F
R1
300 ?
0.1 μ F
+
Removing input power to the charger will cause the BAT
pin current to drop to near zero, with only the divider
current remaining as a small drain on the battery. Even
that current can be eliminated with a switch as shown in
Figures 2 and 5.
V BAT
+
R3
12k
220k +
Q3
VN2222
OVP
R4
BOOST PROG
L1**
33 μ H LT1510 100k
D2
1N914
GND V C
1k
I BAT
SENSE BAT
+
C OUT 2V TO
* TOKIN OR MARCON CERAMIC 22 μ F 20V
SURFACE MOUNT TANT
** COILTRONICS CTX33-2
Figure 6. Charging NiMH or NiCd Batteries
(Efficiency at 0.5A ≈ 90%)
R2
11k
Q1
VN2222
ON: I BAT = 0.5A
OFF: I BAT = 0.05A
1510 F05.5
4.99k
0.25%
For a 2-level charger, R1 and R2 are found from:
( 2000 )( 2 . 465 )
1510 F05
Figure 5. Disconnecting Voltage Divider
Some battery manufacturers recommend termination of
constant-voltage float mode after charging current has
dropped below a specified level (typically 50mA to 100mA)
and a further time-out period of 30 minutes to 90 minutes
I BAT =
R PROG
R 1 = ( 2 . 465 )( 2000 )
I LOW
R 2 =
( 2 . 465 )( 2000 )
I HI ? I LOW
has elapsed. This may extend the life of the battery, so
check with manufacturers for details. The circuit in Figure
7 will detect when charging current has dropped below
75mA. This logic signal is used to initiate a time-out
All battery chargers with fast-charge rates require some
means to detect full charge state in the battery to terminate
the high charging current. NiCd batteries are typically
charged at high current until temperature rise or battery
11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1510CSPBF | 制造商:Linear Technology 功能描述:LT1510CSPBF |
| LT1510I | 制造商:LINER 制造商全称:Linear Technology 功能描述:Constant-Voltage/ Constant-Current Battery Charger |
| LT1510IGN | 功能描述:IC BATT CHARGER CONST V/I 16SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:电池监控器 电池化学:碱性，锂离子，镍镉，镍金属氢化物 电源电压:1 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:带卷 (TR) |
| LT1510IGN#PBF | 功能描述:IC BATT CHARGER CONST V/I 16SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:电池监控器 电池化学:碱性，锂离子，镍镉，镍金属氢化物 电源电压:1 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:带卷 (TR) |
| LT1510IGN#TR | 功能描述:IC CHARGER BATT CONST V/I 16SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:电池监控器 电池化学:碱性，锂离子，镍镉，镍金属氢化物 电源电压:1 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:带卷 (TR) |
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