移动电源锂电池充电IC ME4057SPG
更新时间：2014-07-17 14:33:16 信息编号：2483663 发布者IP：58.250.241.235 浏览：70次
- 供应商
- 深圳市飙发科技有限公司 商铺
- 认证
- 资质核验：已通过营业执照认证入驻顺企：第11年主体名称：深圳市飙发科技有限公司组织机构代码：440301104540120
- 报价
- 请来电询价
- 所在地
- 深圳市福田区华富街道振华西路3号富荔花园2栋2单元504
- 联系电话
- 86-075583208119
- 手机号
- 13138895962
- 经理
- 凡静 请说明来自顺企网，优惠更多
产品详细介绍
me4057 is a complete constant-current/constant
voltage linear charger for single
cell lithium-ion batteries. with a
thermally enhanced 8-pin sop package on the
bottom and low external component count
make the me4057
ideally suited for portable applications.
furthermore the me4057 is specifically designed to work
within usb power
specifications.no external sense resistor
is needed and no blocking diode is
required due to the internal
pmosfet
architecture .thermal feedback regulates
the charge current to limit the
die temperature during high power operation
or high ambient temperature .the charge voltage is fixed at
4.2v,and the charge current can be programmed
externally with a single resistor. the me4057 automatically
terminates the charge cycle when the charge current drops
to 1/10 th the programmed value after the final float voltage
is reached.
when the input supply (wall
adapter or usb supply) is removed the
me4057 automatically enters a low
current
state dropping the battery drain
current to less than 2μa.the me4057 can be put
into shutdown mode reducing
the supply current to 55μa. other features
include battery temperature monitor,
under-voltage lockout, automatic recharge and two status pins to
indicate charge and charge termination.
applications
typical charge cycle（1000mah
battery）
●cellular telephones
●digital still cameras
●mp3 players
●bluetooth applications
●portable devices
●usb bus-powered chargers
●protection of battery cell reverse connection
● programmable charge current up to 1a
●no mosfet sense resistor or blocking
diode required
●complete linear charger in sop8
package for
single cell lithium-ion batteries.
●constant-current/constant-voltage operation with
thermal regulation to maximize rate
without risk of overheating.
● preset 4.2v charge voltage with ±1% accuracy
● automatic recharge
● two status indication for charge
status, no battery and battery failure indicators
● c/10 charge termination
● 55μa supply current in shutdown
● 2.9v trickle current charge threshold
● soft-start limits inrush current
● battery temperature sensing
● available in sop8-pp package
