Texas Instruments Evaluation Module for TPS61256, Tiny Boost Converter with Input Current Limit and Bypas TPS61256EVM-71 TPS61256EVM-711 데이터 시트
제품 코드
TPS61256EVM-711
Introduction
1
Introduction
The TPS6125x device provides a power-supply solution for products powered by either a three-cell
alkaline, NiCd or NiMH battery, or a single-cell Li-Ion or Li-polymer battery. The wide input voltage range
is ideal for portable power applications such as mobile phones or computer peripherals. In addition, the
TPS6125x can also maintain its output biased at the input voltage level. In this mode, the synchronous
rectifier is current-limited, and allows external loads (for example, an audio amplifier) to be powered with a
restricted supply. In this mode, quiescent current is reduced to 18
alkaline, NiCd or NiMH battery, or a single-cell Li-Ion or Li-polymer battery. The wide input voltage range
is ideal for portable power applications such as mobile phones or computer peripherals. In addition, the
TPS6125x can also maintain its output biased at the input voltage level. In this mode, the synchronous
rectifier is current-limited, and allows external loads (for example, an audio amplifier) to be powered with a
restricted supply. In this mode, quiescent current is reduced to 18
μ
A. Input current in shutdown mode is
less than 5
μ
A in order to maximize battery life.
1.1
Requirements
The TPS6125xEVM is designed to operate over the full input voltage range and produces a fixed output
voltage. Refer to
voltage. Refer to
for fixed output voltage version options.
In order to operate this EVM, only a dc power supply able to deliver between 2.3 V and 5.5 V is required.
1.2
Applications
•
USB Host Supplies from a Single Li-Ion Battery
•
USB Dedicated Charging Port Supply
•
Li-Ion Applications
•
Audio Applications
•
RF-PA Buffers
1.3
Features
•
Up to 92% Efficiency
•
V
IN
Range from 2.3 V to 5.5 V
•
18-
μ
A Quiescent Current in Standby Mode
•
30-
μ
A Quiescent Current in Normal Operation
•
100% Duty-Cycle Mode when V
IN
>
V
OUT
•
Selectable Standby Mode or True Load Disconnect During Shutdown
•
Double-sided, two-active-layer printed circuit board (PCB) with all components on top side
•
Active converter area of approximately 25 mm
2
2
TPS6125xEVM
SLVU427
–
September 2011
Copyright
©
2011, Texas Instruments Incorporated