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参数资料
| 型号： | LT3652HVIMSE#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | BATTERY CHARGE CONTROLLER, PDSO12 |
| 封装： | LEAD FREE, PLASTIC, MSOP-12 |
| 文件页数： | 9/24页 |
| 文件大小： | 250K |
| 代理商： | LT3652HVIMSE#PBF |
LT3652HV
17
3652hvf
APPLICATIONS INFORMATION
and 25°C float voltage (VFLOAT(25°C)) specified, and using
a convenient value of 2.4k for RSET, necessary resistor
values follow the relations:
RFB1 = –RSET (TC 4405)
= –2.4k (–0.0198 4405) = 210k
RFB2 = RFB1 / ({[VFLOAT(25°C) + RFB1 (0.0674/
RSET)] / VFB} – 1)
= 210k/({[13.5 + 210k (0.0674/2.4k)]/3.3} – 1)
= 43k
RFB3 = 250k - RFB1||RFB2
= 250k – 210k||43k = 215k (see the Battery Float
Voltage Programming section)
While the circuit in Figure 9 creates a linear temperature
characteristic that follows a typical –3.3mV/°C per cell
lead-acid specification, the theoretical float charge voltage
characteristic is slightly nonlinear. This nonlinear charac-
teristic follows the relation VFLOAT(1-CELL) = 4 × 10–5 (T2)
– 6 × 10–3(T) + 2.375 (with a 2.18V minimum), where
T = temperature in °C. A thermistor-based network can
be used to approximate the nonlinear ideal temperature
characteristic across a reasonable operating range, as
shown in Figure 10.
Status Pins
The LT3652HV reports charger status through two open
collector outputs, the CHRG and FAULT pins. These pins
can accept voltages as high as VIN, and can sink up to
10mA when enabled.
The CHRG pin indicates that the charger is delivering
current at greater that a C/10 rate, or 1/10th of the pro-
grammed maximum charge current. The FAULT pin signals
bad battery and NTC faults. These pins are binary coded,
and signal following the table below, where ON indicates
pin pulled low, and OFF indicates pin high-impedance:
STATUS PINS STATE
CHARGER STATUS
CHRG
FAULT
OFF
Not Charging — Standby or Shutdown Mode
OFF
ON
Bad Battery Fault (Precondition Timeout / EOC
Failure)
ON
OFF
Normal Charging at C/10 or Greater
ON
NTC Fault (Pause)
If the battery is removed from an LT3652HV charger that
is configured for C/10 termination, a sawtooth waveform
LT3652HV
196k
198k
6-CELL
LEAD-ACID
BATTERY
22k
B = 3380
3652 F10a
BAT
69k
VFB
+
TEMPERATURE (°C)
–10
V
FLOAT
(V)
10
50
40
60
020
30
3652 F10b
12.8
13.0
13.2
13.4
13.6
13.8
14.0
14.6
14.4
14.2
14.8
THEORETICAL VFLOAT
PROGRAMMED VBAT(FLOAT)
Figure 10. Thermistor-Based Temperature Compensation Network Programs VFLOAT to Closely Match Ideal
Lead-Acid Float Charge Voltage for 6-Cell Charger
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3652HVIMSE-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Power Tracking 2A Battery Charger |
| LT3652IDD | 制造商:LINER 制造商全称:Linear Technology 功能描述:Power Tracking 2A Battery Charger for Solar Power |
| LT3652IDD#PBF | 功能描述:IC BATTERY CHARGER 2A 12DFN 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) |
| LT3652IDD#TRPBF | 功能描述:IC BATTERY CHARGER 2A 12DFN 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) |
| LT3652IDDPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Power Tracking 2A Battery Charger for Solar Power |
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