参数资料
| 型号： | LTC4088EDE#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 7/24页 |
| 文件大小： | 0K |
| 描述： | IC BATT CHARGER/USB 14-DFN |
| 标准包装： | 2,500 |
| 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： | 4.35 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-WFDFN 裸露焊盘 |
| 供应商设备封装： | 14-DFN-EP（4x3） |
| 包装： | 带卷 (TR) |
LTC4088
TYPICAL PERFORMANCE CHARACTERISTICS
T A = 25°C, unless otherwise noted.
CHRG Pin Current vs Voltage
(Pull-Down State)
3.3V LDO Transient Response
(5mA to 15mA)
Suspend LDO Transient Response
(500μA to 1mA)
100
80
60
40
V BUS = 5V
V BAT = 3.8V
I LDO3V3
5mA/DIV
0mA
V LDO3V3
20mV/DIV
AC COUPLED
I OUT
500μA/DIV
0mA
V OUT
20mV/DIV
AC-COUPLED
20
V BAT = 3.8V
20μs/DIV
4088 G20
500μs/DIV
4088 G21
0
0
1
2
3
4
5
CHRG PIN VOLTAGE (V)
4088 G19
PIN FUNCTIONS
I BAT =
V PROG
NTC (Pin 1): Input to the NTC Thermistor Monitoring
Circuits. The NTC pin connects to a negative temperature
coefficient thermistor which is typically co-packaged with
the battery pack to determine if the battery is too hot or
too cold to charge. If the battery’s temperature is out of
range, charging is paused until the battery temperature re-
enters the valid range. A low drift bias resistor is required
from V BUS to NTC and a thermistor is required from NTC
to ground. If the NTC function is not desired, the NTC pin
should be grounded.
CLPROG (Pin 2): USB Current Limit Program and Monitor
Pin. A 1% resistor from CLPROG to ground determines
the upper limit of the current drawn from the V BUS pin.
A precise fraction of the input current, h CLPROG , is sent
to the CLPROG pin when the high side switch is on. The
switching regulator delivers power until the CLPROG
pin reaches 1.188V. Therefore, the current drawn from
V BUS will be limited to an amount given by h CLPROG and
R CLPROG . There are several ratios for h CLPROG available,
two of which correspond to the 500mA and 100mA USB
specifications. A multilayer ceramic averaging capacitor
is also required at CLPROG for filtering.
LDO3V3 (Pin 3): LDO Output. The LDO3V3 pin provides
a regulated, always-on 3.3V supply voltage. This pin gets
its power from V OUT . It may be used for light loads such
as a real-time clock or housekeeping microprocessor. A
1μF capacitor is required from LDO3V3 to ground if it will
be called upon to deliver current. If the LDO3V3 output is
not used it should be disabled by connecting it to V OUT .
D2 (Pin 4): Mode Select Input Pin. D2, in combination
with the D0 pin and D1 pin, controls the current limit and
battery charger functions of the LTC4088 (see Table 1).
This pin is pulled low by a weak current sink.
C/X (Pin 5): End of Charge Indication Program Pin. This pin
is used to program the current level at which a completed
charge cycle is indicated by the CHRG pin.
PROG (Pin 6): Charge Current Program and Charge Cur-
rent Monitor Pin. Connecting a 1% resistor from PROG
to ground programs the charge current. If sufficient input
power is available in constant-current mode, this pin servos
to 1V. The voltage on this pin always represents the actual
charge current by using the following formula:
? 1031
R PROG
4088fb
7
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4089 | 制造商:LINER 制造商全称:Linear Technology 功能描述:USB Power Manager with High Voltage Switching Charger |
| LTC4089-1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:USB Power Manager with High Voltage Switching Charger |
| LTC4089-3 | 制造商:LINER 制造商全称:Linear Technology 功能描述:USB Power Manager with High Voltage Switching Charger |
| LTC4089-5 | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Efficiency Battery Charger/USB Power Manager |
| LTC4089EDJC | 制造商:LINER 制造商全称:Linear Technology 功能描述:USB Power Manager with High Voltage Switching Charger |
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