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参数资料
| 型号： | AS1329C EB |
| 厂商： | ams |
| 文件页数： | 8/20页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL AS1329C |
| 设计资源： | Design Support Tool |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步升 |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 3.3V 或 5V |
| 电流 - 输出： | 160mA 或 570mA |
| 输入电压： | 0.85 ~ 5 V |
| 稳压器拓扑结构： | 升压 |
| 频率 - 开关： | 1.2MHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | AS1329C |
AS1329
Datasheet - D e t a i l e d D e s c r i p t i o n
8 Detailed Description
The AS1329 can operate from a single-cell input voltage (V IN ) below 1V, and features fixed frequency (1.2MHz) and current mode PWM control
for exceptional line- and load-regulation. With low R DS(ON) and gate charge internal NMOS and PMOS switches, the device maintains high-
efficiency from light to heavy loads.
Modern portable devices frequently spend extended time in low-power or standby modes, switching to high power-drain only when certain
functions are enabled. The AS1329A, AS1329B and AS1329C are ideal for portable devices since they maintain high-power conversion
efficiency over a wide output power range, thus increasing battery life in these types of devices.
In addition to high-efficiency at moderate and heavy loads, the AS1329A as well as the AS1329B includes an automatic powersave mode that
improves efficiency of the power converter at light loads. The powersave mode is initiated if the output load current falls below a factory
programmed threshold (see Figure 6 on page 5) .
Note: The AS1329C does not support powersave mode and provides continuous operation at all loads, eliminating low-frequency V OUT rip-
ple at the expense of light load efficiency.
Figure 19. AS1329 - Block Diagram
L1
4.7μH
1
SW
1.5V
Single Cell
6
VIN
C IN
1μF
Start Up
OSC
PWM
A
B
A/B
MUX
V OUT
Good
–
+
2.3V
5
VOUT
3.3V
Output
Control
Sync Drive
0.35 ?
0.45 ?
1.2MHz
Ramp
Generator
Slope
Compensator
Control
Σ
Current
Sense
C FF *
R 1
1.02M ?
1%
4
SHDNN
Shutdown
Control
+
PWM –
Comp
–
Shutdown
Powersave
R C
80k ?
C C
150pF
C P2
2.5pF
AS1329
–
g m Error
Amp
+
1.23V
3
FB
C OUT
4.7μF
R 2
640k ? 1%
Powersave
Operation
Control
2
GND
Ref
* Optional
8.1 Low-Voltage Start-Up
The AS1329 requires V IN of only 0.85V (typ) or higher to start up. The low-voltage start-up circuitry controls the internal NMOS switch up to a
maximum peak inductor current of 850mA (typ), with 1.5ms (approx.) off-time during start-up, allowing the devices to start up into an output load.
With a V OUT > 2.3V, the start-up circuitry is disabled and normal fixed-frequency PWM operation is initiated. In this mode, the AS1329 operates
independent of V IN , allowing extended operating time as the battery can drop to several tenths of a volt without affecting output regulation. The
limiting factor for the application is the ability of the battery to supply sufficient energy to the output.
www.ams.com/DC-DC_Step-Up/AS1329
Revision 1.12
8 - 20
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AS1329C-TT_EK_ST | 功能描述:AS1329C - 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 或 5V 电流 - 输出:570mA 电压 - 输入:0.85 V ~ 5 V 稳压器拓扑:升压 频率 - 开关:1.2MHz 板类型:完全填充 所含物品:板 使用的 IC/零件:AS1329C 标准包装:1 |
| AS132R4FLF | 制造商:TT Electronics / IRC 功能描述:AS132R4FLF |
| AS132R4HLF | 制造商:TT Electronics / IRC 功能描述:AS132R4HLF |
| AS132R4JLF | 制造商:TT Electronics / IRC 功能描述:AS132R4JLF |
| AS1330 | 制造商:AMSCO 制造商全称:austriamicrosystems AG 功能描述:4MHz, Low Voltage, DC-DC Step-Up Converter |
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