- 您现在的位置：买卖IC网 > PDF目录16300 > LTC4100EG#PBF (Linear Technology)IC SMART BATTERY CHARGER 24-SSOP PDF资料下载
参数资料
| 型号： | LTC4100EG#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 10/30页 |
| 文件大小： | 0K |
| 描述： | IC SMART BATTERY CHARGER 24-SSOP |
| 标准包装： | 59 |
| 功能： | 充电管理 |
| 电池化学： | 智能电池 |
| 电源电压： | 6 V ~ 28 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 24-SSOP |
| 包装： | 管件 |
| 产品目录页面： | 1341 (CN2011-ZH PDF) |
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页当前第10页第11页第12页第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
LTC4100
TEST CIRCUIT
LTC4100
–
+
1.19V
+
–
EA
V TOL =
V BAT ? V VDAC
V VDAC
? 100
21
CSP
22 18
BAT V SET
V DAC
19
I TH
FOR V VDAC = 17.57V(0x44A0)
DCIN = 21V
( V DCIN ? V BAT )
( V DCIN ? f OSC )
LT1055
0.6V
4100 TC01
OPERATION
Overview (Refer to Block Diagram)
The LTC4100 is composed of a battery charger section, a
charger controller, a 10-bit DAC to control charger current,
an 11-bit DAC to control charger voltage, a SafetySignal
decoder, limit decoder and an SMBus controller block. If
no battery is present, the SafetySignal decoder indicates a
RES_OR condition and charging is disabled by the charger
controller (CHGEN = Low). Charging will also be disabled if
DCDIV is low, or the SafetySignal is decoded as RES_HOT.
If a battery is inserted and AC power is connected, the
battery will be charged with an 80mA “wake-up” current.
The wake-up current is discontinued after t TIMEOUT if the
SafetySignal is decoded as RES_UR or RES_C0LD, and
the battery or host doesn’t transmit charging commands.
The SMBus interface and control block receives Charg-
ingCurrent() and ChargingVoltage() commands via the
SMBus. If ChargingCurrent() and ChargingVoltage()
command pairs are received within a t TIMEOUT interval, the
values are stored in the current and voltage DACs and the
charger controller asserts the CHGEN line if the decoded
SafetySignal value will allow charging to commence. Charg-
ingCurrent() and ChargingVoltage() values are compared
against limits programmed by the limit decoder block; if
the commands exceed the programmed limits these limits
are substituted and overrange flags are set.
The charger controller will assert SMBALERT whenever
a status change is detected, namely: AC_PRESENT,
CLN = CLP = 20V
BATTERY_PRESENT, ALARM_INHIBITED, or V DD power-
fail. The host may query the charger, via the SMBus, to
obtain ChargerStatus() information. SMBALERT will be
de-asserted upon a successful read of ChargerStatus()
or a successful Alert Response Address (ARA) request.
Battery Charger Controller
The LTC4100 charger controller uses a constant off-time,
current mode step-down architecture. During normal
operation, the top MOSFET is turned on each cycle when
the oscillator sets the SR latch and turned off when
the main current comparator I CMP resets the SR latch.
While the top MOSFET is off, the bottom MOSFET is
turned on until either the inductor current trips the current
comparator I REV , or the beginning of the next cycle. The
oscillator uses the equation,
t OFF =
to set the bottom MOSFET on-time. The result is quasi-
constant frequency operation: the converter frequency
remains nearly constant over a wide range of output volt-
ages. This activity is diagrammed in Figure 3.
The peak inductor current, at which I CMP resets the SR
latch, is controlled by the voltage on I TH . I TH is in turn
controlled by several loops, depending upon the situation
at hand. The average current control loop converts the
10
For more information www.linear.com/LTC4100
4100fc
相关PDF资料 |
PDF描述 |
|---|---|
| ESC18DREH-S13 | CONN EDGECARD 36POS .100 EXTEND |
| LT1513IR#PBF | IC BATT CHRGR CONST/PROG I/V 7DD |
| 4-1906052-0 | CA 2MM OFNR 62.5/125,LC SEC BLU |
| ABC06DRTS-S13 | CONN EDGECARD 12POS .100 EXTEND |
| MAX4090EVKIT+ | KIT EVALUATION FOR MAX4090 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4100EGTRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Smart Battery Charger Controller |
| LTC4101 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Smart Battery Charger Controller |
| LTC4101EG | 制造商:LINER 制造商全称:Linear Technology 功能描述:Smart Battery Charger Controller |
| LTC4101EG#PBF | 功能描述:IC CNTRLR BATT CHRG 24-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:电池监控器 电池化学:碱性，锂离子，镍镉，镍金属氢化物 电源电压:1 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:带卷 (TR) |
| LTC4101EG#TRPBF | 功能描述:IC CNTRLR BATT CHRG 24-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:电池监控器 电池化学:碱性，锂离子，镍镉，镍金属氢化物 电源电压:1 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:带卷 (TR) |
发布紧急采购，3分钟左右您将得到回复。