BQ25015 デュアル入力バッテリ・チャージャ、同期整流降圧型コンバータ内蔵、出力可変

概要

The bq25015/7 are highly integrated charge and power management devices targeted at space-limited bluetooth applications. The bq25015/7 devices offer integrated power FET and current sensor for charge control, reverse blocking protection, high accuracy current and voltage regulation, charge status, charge termination, and a highly efficient and low-power dc-dc converter in a small package.

The bq25015/7 devices charge the battery in three phases: conditioning, constant current and constant voltage. Charge is terminated based on minimum current. An internal charge timer provides a backup safety feature for charge termination. The bq25015/7 automatically re-starts the charge if the battery voltage falls below an internal threshold. The bq25015/7 automatically enters sleep mode when V_CC supply is removed.

The integrated low-power high-efficiency dc-dc converter is designed to operate directly from a single-cell Li-ion or Li-Pol battery pack. The output voltage is either adjustable from 0.7 V to VBAT, or fixed at 1.8 V (bq25017) and is capable of delivering up to 300-mA of load current. The dc-dc converter operates at a synchronized 1 MHz switching frequency allowing for the use of small inductors.

特長

Li-Ion Or Li-Pol ChargeManagement and Synchronous DC-DC Power Conversion In a Single Chip
Charges and Powers the System from Either the AC Adapter or USB with Autonomous Power Source Selection
Integrated USB Charge Control with Selectable 100 mA and 500 mA Charge Rates
Integrated Power FET and Current Sensor for Up to 500 mA Charge Applications AND 300 mA DC-DC Controller with Integrated FETs
Reverse Leakage Protection Prevents Battery Drainage
Automatic Power Save Mode For High Efficiency at Low Current, or Forced PWM for Frequency Sensitive Applications
APPLICATIONS
- MP3 Players
- PDAs, Smartphones
- Digital Cameras

機能一覧

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Part number	オーダー・オプション	Number of series cells	Function	Cell chemistry	Charge current (Max) (A)	Operating Vin (Min) (V)	Operating Vin (Max) (V)	Absolute Vin (safety rating) (Max) ((V))	Battery charge voltage (Min) (V)	Battery charge voltage (Max) (V)	Features	Control interface	Control topology	Rating	Operating temperature range (C)	Package Group	Package size: mm2:W x L (PKG)
BQ25015	ご注文	1	Charger	Li-Ion/Li-Polymer	0.5	4.5	6.5	7	4.2	4.2	Integrated Buck Converter UVLO	Standalone (RC-Settable)	Switch-Mode Buck	Catalog	-40 to 125	VQFN \| 20	20VQFN: 16 mm2: 3.5 x 4.5 (VQFN \| 20)
BQ25017	サンプルは利用できません。	1	Charger	Li-Ion/Li-Polymer	0.5	4.5	6.5	7	4.2	4.2	Integrated Buck Converter UVLO	Standalone (RC-Settable)	Switch-Mode Buck	Catalog	-40 to 125	VQFN \| 20	20VQFN: 16 mm2: 3.5 x 4.5 (VQFN \| 20)