- 您现在的位置：买卖IC网 > PDF目录16307 > LTC3559EUD#PBF (Linear Technology)IC USB CHARGER 16-QFN PDF资料下载
参数资料
| 型号： | LTC3559EUD#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 14/24页 |
| 文件大小： | 0K |
| 描述： | IC USB CHARGER 16-QFN |
| 标准包装： | 121 |
| 功能： | 充电管理 |
| 电池化学： | 锂离子（Li-Ion）、锂聚合物（Li-Pol） |
| 电源电压： | 4.3 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WFQFN 裸露焊盘 |
| 供应商设备封装： | 16-QFN-EP（3x3） |
| 包装： | 管件 |
| 产品目录页面： | 1341 (CN2011-ZH PDF) |
LTC3559/LTC3559-1
APPLICATIONS INFORMATION
NTC Thermistor
The battery temperature is measured by placing a nega-
tive temperature coef?cient (NTC) thermistor close to the
battery pack. The NTC circuitry is shown in Figure 3.
To use this feature, connect the NTC thermistor, R NTC ,
between the NTC pin and ground, and a bias resistor, R NOM ,
from V CC to NTC. R NOM should be a 1% resistor with a
value equal to the value of the chosen NTC thermistor at
25°C (R25). A 100k thermistor is recommended since
thermistor current is not measured by the battery charger
and its current will have to be considered for compliance
with USB speci?cations.
The battery charger will pause charging when the re-
sistance of the NTC thermistor drops to 0.54 times the
value of R25 or approximately 54k (for a Vishay “Curve
1” thermistor, this corresponds to approximately 40°C). If
the battery charger is in constant-voltage mode, the safety
timer will pause until the thermistor indicates a return to
a valid temperature.
As the temperature drops, the resistance of the NTC
thermistor rises. The battery charger is also designed
to pause charging when the value of the NTC thermistor
increases to 3.25 times the value of R25. For a Vishay
“Curve 1” thermistor, this resistance, 325k, corresponds
to approximately 0°C. The hot and cold comparators each
have approximately 3°C of hysteresis to prevent oscillation
about the trip point. Grounding the NTC pin disables all
NTC functionality.
DUVLO, UVLO AND SUSPEND
DISABLE MODE
POWER
ON
IF SUSP < 0.4V AND
NO
CHRG HIGH IMPEDANCE
V CC > 4V AND
V CC > BAT + 130mV
YES
FAULT
NTC FAULT
BATTERY CHARGING SUSPENDED
CHRG PULSES
NO FAULT
STANDBY MODE
NO CHARGE CURRENT
CHRG HIGH IMPEDANCE
BAT
2.9V
2.9V < BAT < V RECHRG
TRICKLE CHARGE MODE
1/10 FULL CHARGE CURRENT
CHRG STRONG PULL-DOWN
BAT > 2.9V
CONSTANT CURRENT MODE
FULL CHARGE CURRENT
CHRG STRONG PULL-DOWN
4-HOUR
TIMEOUT
30 MINUTE TIMER BEGINS
30 MINUTE
TIMEOUT
DEFECTIVE BATTERY
NO CHARGE CURRENT
CHRG PULSES
CONSTANT VOLTAGE MODE
4-HOUR TERMINATION TIMER
BEGINS
BAT DROPS BELOW V RECHRG
4-HOUR TERMINATION TIMER RESETS
3559 F02
Figure 2. State Diagram of the Battery Charger Operation
3559fb
14
相关PDF资料 |
PDF描述 |
|---|---|
| CM453232-3R9KL | INDUCTOR CHIP 3.9UH 10% 1812 SMD |
| VE-J1N-EZ-F4 | CONVERTER MOD DC/DC 18.5V 25W |
| CM453232-2R7KL | INDUCTOR CHIP 2.7UH 10% 1812 SMD |
| CM453232-1R8KL | INDUCTOR CHIP 1.8UH 10% 1812 SMD |
| CM453232-1R2KL | INDUCTOR CHIP 1.2UH 10% 1812 SMD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3559EUD-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Linear USB Battery Charger with Dual Buck Regulators |
| LTC3560 | 制造商:LINER 制造商全称:Linear Technology 功能描述:2.25MHz, 800mA Synchronous Step-Down Regulator in ThinSOT |
| LTC3560E | 制造商:LINER 制造商全称:Linear Technology 功能描述:2.25MHz, 800mA Synchronous Step-Down Regulator in ThinSOT |
| LTC3560ES6 | 制造商:LINER 制造商全称:Linear Technology 功能描述:2.25MHz, 800mA Synchronous Step-Down Regulator in ThinSOT |
| LTC3560ES6#PBF | 制造商:Linear Technology 功能描述:2.1 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PDSO6 |
发布紧急采购，3分钟左右您将得到回复。