TPS43000
多拓?fù)洌ń祲?、升壓、sepic)高頻 DC/DC 控制器
制造商:TI
產(chǎn)品信息
描述The TPS43000 is a high-frequency, voltage-mode, synchronous PWM controller that can be used in buck, boost, SEPIC, or flyback topologies. This highly flexible, full-featured controller is designed to drive a pair of external MOSFETs (one N-channel and one P-channel), enabling it for use with a wide range of output voltages and power levels. With an automatic PFM mode, a shutdown current of less than 1 uA, a sleep-mode current of less than 100 uA and a full operating current of less than 2 mA at 1 MHz, it is ideal for building highly efficient, dc-to-dc converters. The TPS43000 operates over a wide input voltage range of 1.8 V to 9.0 V. Typical power sources are distributed power systems, two to four nickel or alkaline batteries, or one to two lithium-ion cells. It can be used to generate regulated output voltages from as low as 0.8 V to 8 V or higher. It operates either in a fixed-frequency mode, where the user programs the frequency (up to 2 MHz), or in an automatic PFM mode. In the automatic mode, the controller goes to sleep when the inductor current goes discontinuous, and wakes up when the output voltage has fallen by 2%. In this hysteretic mode of operation, very high efficiency can be maintained over a very wide range of load current. The device can also be synchronized to an external clock source using the dual function SYNC/SD input pin. The TPS43000 features a selectable two-level current-limit circuit which senses the voltage drop across the energizing MOSFET. The user can select either pulse-by-pulse current limiting or hiccup mode overcurrent protection. The TPS43000 also features a low-power (LP) mode (which reduces gate charge losses in the N-channel MOSFET at high input/output voltages), undervoltage lockout, and soft-start. The TPS43000 is available in a 16-pin TSSOP (PW) package.特性 High-Frequency (2-MHz) Voltage Mode PWM Controller 1.8-V to 9.0-V Input Voltage Range 0.8-V to 8.0-V Output Voltage Range (Higher in Non-Synchronous Boost Topology) High-Efficiency Buck, Boost, SEPIC or Flyback (Buck-Boost) Topology Synchronous Rectification for High-Efficiency Drives External MOSFETs for High-Current Applications Synchronizable Fixed-Frequency PWM or Automatic Pulsed Frequency Modulation (PFM) Mode Built-In Soft-Start User Programmable Discontinuous or Continuous Conduction Mode Selectable Pulse-by-Pulse Current Limiting or Hiccup Mode Protection APPLICATIONS Networking Equipment Servers Base Stations Cellular Telephones Satellite Telephones GPS Devices Digital Still and Handheld Cameras Personal Digital Assistants (PDAs)
電路圖、引腳圖和封裝圖
在線購買
| 型號 | 制造商 | 描述 | 購買 |
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| TPS43000PWG4 | TI | IC REG CTRLR MULT TOP 16TSSOP |
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| TPS43000PWRG4 | TI | IC REG CTRLR MULT TOP 16TSSOP |
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| TPS43000PW | TI | TPS43000 多拓?fù)洌ń祲?、升壓、sepic)高頻 DC/DC 控制器 |
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| TPS43000PWR | TI | TPS43000是一款高頻率、電壓模式同步PWM控制器,適用于多種拓?fù)浣Y(jié)構(gòu),包括降壓、升壓、SEPIC和反激。該控制器設(shè)計用于驅(qū)動外部MOSFET,支持寬輸入電壓范圍和多種輸出電壓配置,具有低靜態(tài)電流和多種保護(hù)功能。 |
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