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| 型号： | BQ24751BRHDTG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC28 |
| 封装： | 5 X 5 MM, GREEN, PLASTIC, QFN-28 |
| 文件页数： | 1/38页 |
| 文件大小： | 1790K |
| 代理商： | BQ24751BRHDTG4 |
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1
FEATURES
APPLICATIONS
DESCRIPTION
ACOP
bq24751B
28LDQFN
TOP VIEW
LEARN
SRN
BAT
CELLS
SRP
SRSET
IADAPT
ACDRV
ACSET
CHGEN
ACN
ACP
ACDET
PVCC
BTST
HIDR
V
REGN
PH
LODR
V
PGND
OVPSET
AGND
VREF
V
ADJ
VDAC
ACGOOD
BA
TDR
V
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www.ti.com .......................................................................................................................................................... SLUS835A – JULY 2008 – REVISED MARCH 2009
Host-Controlled Multi-Chemistry Battery Charger with Low I
q and System Power Selector
–
< 10
A Off-State Battery Discharge Current
2
NMOS-NMOS Synchronous Buck Converter
–
< 1.5 mA Off-State Input Quiescent Current
with 300 kHz Frequency and >95% Efficiency
30-ns Minimum Driver Dead-time and 99.5%
Notebook and Ultra-Mobile Computers
Maximum Effective Duty Cycle
Portable Data Capture Terminals
High-Accuracy Voltage and Current Regulation
Portable Printers
–
±0.5% Charge Voltage Accuracy
Medical Diagnostics Equipment
–
±3% Charge Current Accuracy
Battery Bay Chargers
–
±3% Adapter Current Accuracy
Battery Back-up Systems
–
±2% Input Current Sense Amp Accuracy
Integration
–
Automatic System Power Selection From
The bq24751B is a high-efficiency, synchronous
AC/DC Adapter or Battery
battery charger with integrated compensation and
–
Internal Loop Compensation
system power selector logic, offering low component
count for space-constrained multi-chemistry battery
–
Internal Soft Start
charging applications. Ratiometric charge current and
Safety
voltage programming allows gor high regulation
–
Programmable Input Overvoltage
accuracies, and can be either hardwired with resistors
Protection (OVP)
or programmed by the system power-management
microcontroller using a DAC or GPIOs.
–
Dynamic Power Management (DPM) with
Status Indicator
The bq24751B charges two, three, or four series Li+
cells, supporting up to 10 A of charge current, and is
–
Programmable Inrush Adapter Power
available in a 28-pin, 5x5-mm thin QFN package.
(ACOP) and Overcurrent (ACOC) Limits
–
Reverse-Conduction Protection Input FET
Supports Two, Three, or Four Li+ Cells
5 – 24 V AC/DC-Adapter Operating Range
Analog Inputs with Ratiometric Programming
via Resistors or DAC/GPIO Host Control
–
Charge Voltage (4-4.512 V/cell)
–
Charge Current (up to 10 A, with 10-m
Sense Resistor)
–
Adapter Current Limit (DPM)
Status and Monitoring Outputs
–
AC/DC Adapter Present with Programmable
Voltage Threshold
–
Current Drawn from Input Source
Battery Learn Cycle Control
Supports Any Battery Chemistry: Li+, NiCd,
NiMH, Lead Acid, etc.
Charge Enable
28-pin, 5x5-mm QFN package
Energy Star Low I
q
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright 2008–2009, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Not Recommended For New Designs
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| BQ24751EVM | 功能描述:电源管理IC开发工具 BQ24751 EVM M-Cell Synch Notebook Chrgr RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| BQ24751RHDR | 功能描述:电池管理 MultI-Cell Sync Swit mode Charger RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| BQ24751RHDRG4 | 功能描述:电池管理 MultI-Cell Sync Swit mode Charger RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| BQ24751RHDT | 功能描述:电池管理 MultI-Cell Sync Swit mode Charger RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| BQ24751RHDT | 制造商:Texas Instruments 功能描述:Battery Management IC |
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