- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄377777 > LTC4052EMS8E-4.2 (Linear Integrated Systems) Lithium-Ion Battery Pulse Charger with Overcurrent Protection PDF資料下載
參數(shù)資料
| 型號： | LTC4052EMS8E-4.2 |
| 廠商： | Linear Integrated Systems |
| 英文描述： | Lithium-Ion Battery Pulse Charger with Overcurrent Protection |
| 中文描述： | 鋰離子電池脈沖充電器與過流保護(hù) |
| 文件頁數(shù)： | 3/8頁 |
| 文件大?。?/td> | 166K |
| 代理商： | LTC4052EMS8E-4.2 |
LTC4052-4.2
3
405242i
PIU
SENSE (Pin 1):
Overcurrent Sense Input. A sense resistor
(R
SENSE
) should be connected from V
IN
to the SENSE pin
to program the current limit level. When current limit is
tripped, the pass transistor immediately turns off and
turns back on after a 640ms time-out period (C
TIMER
=
0.1
μ
F). The on-off cycle will continue as long as the
overcurrent condition persists or until the timer runs out.
If overcurrent protection is not needed, short SENSE to
V
IN
.
ACPR (Pin 2):
Wall Adapter AC Present Open-Drain Out-
put. When the input voltage (wall adapter) is applied to the
LTC4052, this pin is pulled to ground by an internal
N-channel MOSFET capable of driving an LED.
V
IN
(Pin 3):
Positive Input Supply Voltage (4.5V
≤
V
IN
≤
10V). Bypass this pin with a 1
μ
F capacitor in series with a
4.7
resistor.
GND (Pin 4):
Electrical Ground Connection and provides
a thermal path from the IC to the PC board copper. Use
large copper pads and traces for maximum heat transfer.
TIMER (Pin 5):
Timer Set Pin. The timer period is set by a
capacitor (C
TIMER
) to ground. The timer period is:
t
TIMER
= (C
TIMER
3Hr)/(0.1
μ
F). The minimum ON time,
minimum OFF time and the overcurrent time-out period all
scale with t
TIMER
.
CHRG (Pin 6):
Charge Status Open-Drain Output. When a
depleted battery is being charged, the CHRG pin is pulled
to ground by an internal N-channel MOSFET capable of
driving an LED. Once the duty cycle at the GATE pin drops
below 10%, the N-MOSFET turns off and a weak 40
μ
A
current source to ground turns on to indicate a near end-
of-charge
C
/10 condition. When a time-out occurs or the
input supply is removed, the CHRG pin becomes high
impedance.
GATE (Pin 7):
Gate Drive Output Pin for Internal and
External Pass Transistors. An external N-MOSFET transis-
tor can be connected in parallel with the internal transistor
to reduce the on-resistance for higher charge current. In
this case, an external blocking diode is required to prevent
damage to the battery if V
IN
is shorted to ground. A 10
μ
A
current source pulls this pin up to the charge pump
potential when turned on and a 40
μ
A current source pulls
it down to ground to turn it off. If an overcurrent condition
is detected, the GATE pin is immediately pulled to ground.
The voltage at this pin is internally clamped to 12V above
the GND pin.
A series RC network from the GATE to the V
IN
pin is
required to control the slew rate at the V
IN
pin when the
switch is turned on or off. The slew rate control prevents
excessive current from the capacitor located in the wall
adapter from flowing into the battery when the pass
transistor is turned on.
BAT (Pin 8):
Battery Sense Input Pin. This pin is clamped
to 4.7V if the battery is disconnected while charging. An
internal resistor divider presets the final float voltage to
4.2V. If the BAT pin drops below 4.05V after the charge
cycle has ended, the timer resets and a new charge cycle
begins.
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
Absolute Maximum Rating for GATE pin applies only to externally
applied voltage. During normal operation the LTC4052-4.2’s internal
charge pump can generate GATE pin voltage exceeding absolute
maximum but it is internally current limited.
Note 3:
The LTC4052EMS8E-4.2 is guaranteed to meet performance
specifications from 0
°
C to 70
°
C. Specifications over the –40
°
C to 85
°
C
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
Note 4:
Junction temperature T
J
is calculated from the ambient
temperature T
A
and power dissipation P
D
according to the following
formula: T
J
= T
A
+ (P
D
θ
JA
°
C/W)
ELECTRICAL CHARACTERISTICS
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC4056 | 150mA Standalone Linear Li-Ion Battery Charger in ThinSOT |
| LTC1732-4.2 | Lithium-Ion Linear Battery Charger Controller |
| LTC1731EMS8-4.1 | Lithium-Ion Linear Battery Charger Controller |
| LTC1731ES8-4.1 | Lithium-Ion Linear Battery Charger Controller |
| LTC1732-4 | Lithium-Ion Linear Battery Charger Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC4053 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:150mA Standalone Linear Li-Ion Battery Charger in ThinSOT |
| LTC4053-4.2 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:USB Compatible Lithium-Ion Battery Charger with Thermal Regulation |
| LTC4053EDD-4.2 | 制造商:Linear Technology 功能描述:Battery Charger Li-Ion 500mA 4.2V 10-Pin DFN EP |
| LTC4053EDD-4.2#PBF | 功能描述:IC CHARGER BATTERY USB 10-DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標(biāo)準(zhǔn)包裝:61 系列:- 功能:電源管理 電池化學(xué):鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:4.35 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:22-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:22-DFN（6x3）裸露焊盤 包裝:管件 |
| LTC4053EDD-4.2#TRPBF | 功能描述:IC CHARGER BATTERY USB 10-DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標(biāo)準(zhǔn)包裝:61 系列:- 功能:電源管理 電池化學(xué):鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:4.35 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:22-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:22-DFN（6x3）裸露焊盤 包裝:管件 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。