- 您现在的位置：买卖IC网 > PDF目录1838 > MAX1641EEE+ (Maxim Integrated Products)IC SW-MODE CUR SOURCE ADJ 16QSOP PDF资料下载
参数资料
| 型号： | MAX1641EEE+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/12页 |
| 文件大小： | 0K |
| 描述： | IC SW-MODE CUR SOURCE ADJ 16QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 功能： | 充电管理 |
| 电源电压： | 5.5 V ~ 26 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-QSOP |
| 包装： | 管件 |
MAX1640/MAX1641
Adjustable-Output, Switch-Mode
Current Source with Synchronous Rectifier
47 μ F
0.33 μ F
47 μ F
0.33 μ F
4.7 μ F
0.1 μ F
IN
LDOL
LDOH
PDRV
1/2 IR7309
P
4.7 μ F
0.1 μ F
IN
LDOL
LDOH
PDRV
1/2 IR7309
P
D0
D1
MAX1641
D0
D1
MAX1640
R TOFF
TOFF
NDRV
1/2 IR7309
N
47 μ H
R TOFF
TOFF
1/2 IR7309
NDRV
N
REF
PGND
V OUT
REF
PGND
47 μ H
R1
BATT
R3
0.1 μ F
R2
SET
CS+
100m Ω
R4
0.1 μ F
R1
SET
CS+
100m Ω
CS-
TERM
R2
CS-
R3
V OUT
BATT
CC
GND
TERM
0.01 μ F
CC
GND
R4
0.01 μ F
Figure 1a. Standard Application Circuit
_______________Detailed Description
The MAX1640/MAX1641 switch-mode current sources
utilize a hysteretic, current-mode, step-down pulse-
width-modulation (PWM) topology with constant off-
time. Internal comparators control the switching
mechanism. These comparators monitor the current
through a sense resistor (R SENSE ) and the voltage at
TERM. When inductor current reaches the current limit
[(V CS+ - V CS- ) / R SENSE ], the P-channel FET turns off
and the N-channel FET synchronous rectifier turns on.
Inductor energy is delivered to the load as the current
ramps down. This ramp rate depends on R TOFF and
inductor values. When off-time expires, the P-channel
FET turns back on and the N-channel FET turns off.
Two digital inputs, D0 and D1, select between four pos-
sible current levels (Table 1). In pulse-trickle mode, the
Maxim Integrated
Figure 1b. Standard Application Circuit
part operates for 12.5% of the period set by R TOFF ,
resulting in a lower current for pulse-trickle charging.
See the Functional Diagram . Figures 1a and 1b show
the standard application circuits.
Charge Mode: Programming the
Output Currents
The sense resistor, R SENSE , sets two charging current
levels. Choose between these two levels by holding
D0 high, and toggling D1 either high or low (Table 1).
The fast-charge current level equals V CS / R SENSE
where V CS is the full-scale current-sense voltage of
150mV. Alternatively, calculate this current by V REF /
(13.3R SENSE ). The top-off current equals V SET /
(13.3R SENSE ). A resistor-divider from REF to GND pro-
grams the voltage at SET (Figure 2).
7
相关PDF资料 |
PDF描述 |
|---|---|
| MAX1644EAE-T | IC REG BUCK SYNC ADJ 2A 16SSOP |
| MAX1651CSA | IC REG CTRLR BUCK PWM 8-SOIC |
| MAX1653EEE-T | IC REG CTRLR BUCK PWM CM 16-QSOP |
| MAX1659ESA+ | IC REG LDO 5V/ADJ .35A 8-SOIC |
| MAX1667EAP+T | IC SMART BATT CHGR LEVEL2 20SSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1641EEE+ | 功能描述:电流型 PWM 控制器 Adj-Out Switch Mode Current Source RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX1641EEE+T | 功能描述:电流型 PWM 控制器 Adj-Out Switch Mode Current Source RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX1641EEE-T | 功能描述:电流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX1642EUA | 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX1642EUA+ | 功能描述:直流/直流开关转换器 Integrated Circuits (ICs) RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
发布紧急采购，3分钟左右您将得到回复。