BQ25971YFFT屬于集成電路（IC）的電池充電器。由美國(guó)德州儀器公司制造生產(chǎn)的BQ25971YFFT電池充電器電池充電器 PMIC（電源管理集成電路）是元器件級(jí)產(chǎn)品系列，用于在電子設(shè)備中實(shí)現(xiàn)電池充電控制和充電管理功能。這些器件主要根據(jù)電池化學(xué)及其設(shè)計(jì)用于的電池?cái)?shù)量來分類，可提供電化學(xué)電池和超級(jí)電容器安全充電所必需的電流或電壓調(diào)節(jié)和監(jiān)視功能。

1 Features

1? 97% Efficient power stage for 8-A fast charge

? Patent pending switched cap charger architecture

optimized for 50% duty cycle

– Input voltage is 2x battery voltage (3.5 V to

4.65 V)

– Output current is 2x of input current (up to

4.5 A)

– Reduces power loss across the cable

? Integrated programmable protection features for

safe operation

– Input over-voltage protection (BUS_OVP)

– Input over-current protection (BUS_OCP) with

adjustable alarm

– Input over-voltage with external OVP FET

(VAC_OVP up to 17 V, BQ25970 only)

– Battery over-voltage protection (BAT_OVP)

with adjustable alarm

– Output over-voltage (VOUT_OVP)

– Input over-current protection (BUS_OCP) with

adjustable alarm

– IBAT over-current protection (BAT_OCP) with

adjustable alarm

– Switching MOSFET cycle by cycle current limit

– Battery temperature monitoring

– Connector Temperature Monitoring

? Programmable settings for system optimization

– Optional VBATREG and IBATREG regulation

for system load and wall adapter transients

(BQ25970 only with External OVP FET)

– STAT, FLAG, and MASK options for interrupts

– ADC Readings and configuration

? Integrated 12-bit effective analog-to digital

converter (ADC)

– ±0.5% BUS Voltage

– ±0.5% VOUT Voltage

– –0.4% to 0.2% BAT Voltage with differential

sensing

– ±1.5% BAT Current at 6 A with external RSENSE

– ±1% BAT Temperature

– ±1% BUS Temperature

– ±4°C Die temperature

2 Applications

? Smartphone

? Tablet PC

3 Description

The BQ2597x is a 97% efficient, 8-A battery charging

solution using a switched cap architecture. This

architecture and the integrated FETs are optimized to

enable a 50% duty cycle, allowing the cable current

to be half the current delivered to the battery,

reducing the losses over the charging cable as well

as limiting the temperature rise in the application.