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| 型号： | AS1326A-BTDT |
| 厂商： | AUSTRIAMICROSYSTEMS AG |
| 元件分类： | DC/DC变换器 |
| 英文描述： | Adj. 650mA, 1MHz, Boost |
| 中文描述： | 高电流0.8A的DC - DC升压转换器 |
| 文件页数： | 12/18页 |
| 文件大小： | 1108K |
| 代理商： | AS1326A-BTDT |
www.austriamicrosystems.com
Revision 1.05
12 - 18
AS1326
Datasheet - Application Information
Setting the Switch Current Limit
The ISET pin is used to adjust the inductor current limit and to implement the soft-start feature.
With pin ISET connected to pin REF, the inductor current limit is set to 1.6A. With ISET connected to a resistor-divider
network from pin REF to GND, the current limit is calculated as:
Soft Start
The soft-start feature can be implemented by placing a resistor between pin ISET and pin REF
(see Figure 21)
and a
capacitor between pin ISET and GND.
Figure 21. Circuit for Soft-Start with Maximum Switch Current Limit
At power-up, ISET is 0V and the LX current is zero. As the capacitor voltage rises, the current increases and the output
voltage rises. The soft-start time constant is:
Where:
R
SS
≥
220k
Ω
.
Note:
Placing a capacitor across the lower resistor of the current-limiting resistor-divider network enables both the
current-limit and soft-start
(see Figure 22)
.
Figure 22. Application Circuit for Soft-Start with Reduced Switch Current Limit
(EQ 2)
I
LIMIT
1,6A
1,25V
---------------
=
R
SS
≥
220k
Ω
C
SS
1
ISET
2
REF
AS1326A/
AS1326B
10nF
I
LIMIT
= 1.6A
t
SS
= Rss x C
SS
(EQ 3)
t
SS
= R
SS
x C
SS
C
SS
1
ISET
2
REF
AS1326A/
AS1326B
10nF
t
SS
= (Rss
1
|| Rss
2
) C
SS
R
SS2
R
SS
≥
220k
Ω
I
LIMIT
= 1.6A
Rss
2
Rss
1 +
Rss
2
(
)
相关PDF资料 |
PDF描述 |
|---|---|
| AS1326B-BTDT | Adj. 650mA, 1MHz, Boost; Package Type: TDFN(3x3)-10; Miscellaneous: Logic-High On |
| AS1329A-BTTT | Adj. 315mA, 1.2MHz Boost feed.; Package Type: TSOT23-6; Miscellaneous: (medium loads); Miscellaneous: Powersave Operation |
| AS1329B-BTTT | Adj. 315mA, 1.2MHz Boost feed.; Package Type: TSOT23-6; Miscellaneous: (light loads); Miscellaneous: Powersave Operation |
| AS1329C-BTTT | Adj. 315mA, 1.2MHz Boost feed.; Package Type: TSOT23-6; Miscellaneous: Continuous Switching |
| AS1331-BTDT-AD | 300mA Buck-Boost Converter; Package Type: TDFN(3x3)-10; Output Range: 2.5 to 3.3V |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AS1326A-BTDT-1K | 功能描述:IC REG BST SYNC 3.3V/ADJ 10-TDFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:50 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:5 V ~ 25 V 输入电压:2.3 V ~ 5.5 V PWM 型:电流模式 频率 - 开关:600kHz，1.2MHz 电流 - 输出:1A 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 包装:管件 供应商设备封装:8-MSOP |
| AS1326A-BTDU | 制造商:ams 功能描述:DC-DC Step Up, Fixed, Sync, 0.7 to 5.0V input, 3.3, 2.5 to 5.0V (650mA) Output, 96% Efficiency, 1200 kHz fmax, TDFN-10, Synchronizes to External Clock, Tray |
| AS1326A-TD_EK_ST | 功能描述:AS1326 - DC/DC, Step Up 1, Non-Isolated Outputs Evaluation Board 制造商:ams 系列:- 零件状态:有效 主要用途:DC/DC，步升 输出和类型:1，非隔离 功率 - 输出:- 电压 - 输出:3.3V 电流 - 输出:800mA 电压 - 输入:0.7 V ~ 5 V 稳压器拓扑:升压 频率 - 开关:1MHz 板类型:完全填充 所含物品:板 使用的 IC/零件:AS1326 标准包装:1 |
| AS1326B | 制造商:AMSCO 制造商全称:austriamicrosystems AG 功能描述:High Current, 0.8A DC-DC Step-Up Converters |
| AS1326B-BTDR | 功能描述:IC REG BST SYNC 3.3V/ADJ 10TDFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:MIC23xxx HyperLight Load™ Regulators 标准包装:5,000 系列:HyperLight Load® 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.8V 输入电压:2.7 V ~ 5.5 V PWM 型:混合物 频率 - 开关:4MHz 电流 - 输出:2A 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-VFDFN 裸露焊盘，8-MLF? 包装:带卷 (TR) 供应商设备封装:8-MLF?（2x2） 产品目录页面:1094 (CN2011-ZH PDF) 其它名称:576-3303-2 |
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