- 您现在的位置：买卖IC网 > PDF目录1834 > LTC4160EUDC-1#TRPBF (Linear Technology)IC SWITCH POWER MANAGER 20-QFN PDF资料下载
参数资料
| 型号： | LTC4160EUDC-1#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 13/32页 |
| 文件大小： | 0K |
| 描述： | IC SWITCH POWER MANAGER 20-QFN |
| 标准包装： | 2,500 |
| 系列： | Bat-Track™, PowerPath™ |
| 功能： | 电源管理 |
| 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： | 20-WFQFN 裸露焊盘 |
| 供应商设备封装： | 20-QFN（3x4） |
| 包装： | 带卷 (TR) |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页当前第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页
LTC4160/LTC4160-1
OPERATION
Introduction
The LTC4160/LTC4160-1 are high efficiency bidirectional
switching power managers and Li-Ion/Polymer battery
chargers designed to make optimal use of the power
available while minimizing power dissipation and easing
thermal budgeting constraints. The innovative PowerPath
architecture ensures that the end product application is
powered immediately after external voltage is applied,
even with a completely dead battery, by prioritizing power
to the end product.
When acting as a step-down converter, the LTC4160/
LTC4160-1’s bidirectional switching regulator takes power
from USB, wall adapters, or other 5V sources and provides
power to the end product application and efficiently charges
the battery using Bat-Track. Because power is conserved,
the LTC4160/LTC4160-1 allow the load current on V OUT to
exceed the current drawn by the USB port, making maxi-
mum use of the allowable USB power for battery charging.
For USB compatibility, the switching regulator includes
a precision average input current limit. The bidirectional
switching regulator and battery charger communicate to
ensure that the average input current never exceeds the
USB specifications.
In addition, the bidirectional switching regulator can also
operate as a 5V synchronous step-up converter, taking
power from V OUT and delivering up to 500mA to V BUS
without the need for any additional external components.
This enables systems with USB dual-role transceivers to
function as USB On-The-Go dual-role devices. True output
disconnect and average output current limit features are
included for short circuit protection.
The LTC4160/LTC4160-1 contain both an internal 180mΩ
ideal diode as well as an ideal diode controller for use
with an external P-channel MOSFET. The ideal diodes
from BAT to V OUT guarantee that ample power is always
available to V OUT even if there is insufficient or absent
power at V BUS .
An always-on LDO provides a regulated 3.3V from avail-
able power at V OUT . Drawing very little quiescent current,
this LDO will be on at all times and can be used to supply
up to 20mA.
The LTC4160/LTC4160-1 also feature an overvoltage pro-
tection circuit which is designed to work with an external
N-channel MOSFET to prevent damage to their inputs
caused by accidental application of high voltage.
Finally, to prevent battery drain when a device is con-
nected to a suspended USB port, an LDO from V BUS to
V OUT provides low power USB suspend current to the end
product application.
Bidirectional PowerPath Switching Regulator –
Step-Down Mode
The power delivered from V BUS to V OUT is controlled by
a 2.25MHz constant frequency bidirectional switching
regulator in step-down mode. V OUT drives the combination
of the external load and the battery charger. To meet the
maximum USB load specification, the switching regulator
contains a measurement and control system that ensures
that the average input current remains below the level
programmed at CLPROG.
If the combined load does not cause the switching regu-
lator to reach the programmed input current limit, V OUT
will track approximately 0.3V above the battery voltage.
By keeping the voltage across the battery charger at this
low level, power lost to the battery charger is minimized.
Figure 1 shows the power flow in step-down mode.
If the combined external load plus battery charge current
is large enough to cause the switching regulator to reach
the programmed input current limit, the battery charger
will reduce its charge current by precisely the amount
necessary to enable the external load to be satisfied. Even
if the battery charge current is programmed to exceed the
allowable USB current, the USB specification for average
input current will not be violated; the battery charger will
reduce its current as needed. Furthermore, if the load cur-
rent at V OUT exceeds the programmed power from V BUS ,
load current will be drawn from the battery via the ideal
diode(s) even when the battery charger is enabled.
The current out of CLPROG is a precise fraction of the V BUS
current. When a programming resistor and an averaging
capacitor are connected from CLPROG to GND, the volt-
age on CLPROG represents the average input current of
the switching regulator. As the input current approaches
41601fa
13
相关PDF资料 |
PDF描述 |
|---|---|
| LTC4410ES6#TRPBF | IC POWER MANAGER USB TSOT23-6 |
| LTC4411ES5#TRMPBF | IC IDEAL DIODE LOW LOSS TSOT23-5 |
| LTC4412IS6#TRMPBF | IC PWR PATH CNTRLR TSOT23-6 |
| LTC4413EDD-1#PBF | IC IDEAL DIODE DUAL 10-DFN |
| LTC4413EDD#PBF | IC IDEAL DIODE DUAL 10-DFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4210 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Supply Hot Swap Controller for Advanced Mezzanine Card |
| LTC4210-1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Hot Swap Controller in 6-Lead SOT-23 Package |
| LTC42101CS6 | 制造商:Linear Technology 功能描述: |
| LTC4210-1CS6 | 制造商:Linear Technology 功能描述:Hot Swap Controller 1-CH 16.5V 6-Pin TSOT-23 |
| LTC4210-1CS6#PBF | 制造商:Linear Technology 功能描述:Hot Swap Controller 1-CH 16.5V 6-Pin TSOT-23 制造商:Linear Technology 功能描述:IC HOT SWAP CONT 制造商:Linear Technology 功能描述:HOT SWAP CNTRL 16.5VIN 6SOT23 制造商:Linear Technology 功能描述:HOT SWAP, CNTRL, 16.5VIN, 6SOT23 制造商:Linear Technology 功能描述:IC, HOT SWAP CONT; Controller Applications:Hot Board Insertion, Electronic Circuit Breaker, Industrial High Side Switch; Input Voltage:16.5V; Internal Switch:Yes; Supply Voltage Min:2.7V; Supply Voltage Max:16.5V; No. of Pins:6 ;RoHS Compliant: Yes |
发布紧急采购，3分钟左右您将得到回复。