TPS43000 - 多拓扑（降压、升压、sepic）高频 DC/DC 控制器

TPS43000是TI德州仪器公司的一款控制器（外部开关）产品，TPS43000是多拓扑（降压、升压、sepic）高频 DC/DC 控制器，本站介绍了TPS43000的封装应用图解、特点和优点、功能等，并给出了与TPS43000相关的TI元器件型号供参考。

TPS43000 - 多拓扑（降压、升压、sepic）高频 DC/DC 控制器 - 控制器（外部开关） - DC/DC开关稳压器 - 德州仪器

产品描述

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.

产品特性

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)

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