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參數(shù)資料
| 型號： | TWL2214CAPFB |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQFP48 |
| 封裝： | PLASTIC, TQFP-48 |
| 文件頁數(shù)： | 31/39頁 |
| 文件大?。?/td> | 583K |
| 代理商： | TWL2214CAPFB |
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Product Folder: TWL2214CA, Power Supply Management IC and Li-Ion Battery Charge Control
PRODUCT FOLDER | PRODUCT INFO: FEATURES | DESCRIPTION | DATASHEETS | PRICING/AVAILABILITY/PKG | SAMPLES
PRODUCT SUPPORT: APPLICATIONS
TWL2214CA, Power Supply Management IC and Li-Ion Battery Charge Control
DEVICE STATUS: ACTIVE
PARAMETER NAME
TWL2214CA
Primary Battery Charger
Yes
Backup Battery Charger
No
Integrated LDO Regulators (#) 6
System Reset Controller
No
Real-Time Clock
Yes
Pin Count
48
FEATURES
q
Integrated, Single-Chip Solution for Battery Charge Control and Power Supply Management
q
Linear Charger for Single-Cell Li-Ion or Li-Polymer Packs
q
Integrated Control over Precharge, Constant-Current, and Constant-Voltage Charging Phases
q
Programmable Charge Termination by Minimum Current and Time
q
Battery Temperature Sensing
q
Pack Wake-Up and Damaged Cell Detect Functions
q
Safety Charge Timers During Precharge and Constant-Current Charging
q
Programmable Charging Current
q
Six Programmable Low-Dropout Linear Voltage Regulators
q
Over 65-dB Power Supply Rejection Ratio (PSRR) From 10 Hz to 10 kHz
q
System Over- and Under-Voltage Shutdown
q
Power On/Off and Reset Control Logic
q
Three Individually Selectable LED Backlight Drivers
q
Vibrator and Ringer Drivers
q
Internal 8-Bit Analog-to-Digital Converter With Auxiliary Inputs
q
I2C Control Interface and Three-Wire SPI Interface
q
48-Terminal Plastic TQFP (PFB) or MicroStar Junior BGA (GQR) Package
MicroStar Junior BGA is a trademark of Texas Instruments Incorporated.
DESCRIPTION
The TWL2214CA device is a single-chip battery and power management solution for wireless handsets, pagers, personal digital assistants (PDAs), and other battery-powered devices. For battery
charging, the device incorporates a linear charger for single-cell Li-Ion and lithium polymer battery packs. Prior to charging, the TWL2214CA device initiates battery pack wake-up and damaged cell
detect functions. For deeply discharged batteries, the device performs precharge conditioning by trickle charge to a user-defined current setting. Once an acceptable pack voltage is detected, the
TWL2214CA device applies a constant-current fast charge at a current level that is determined by the combination of an external sense resistor and user-programmable sense voltage. When the
battery reaches the selected charge regulation voltage, the TWL2214CA device maintains regulation until charging is terminated by a minimum current or a timer. During the entire charge cycle,
the TWL2214CA device monitors temperature by external thermistor and suspends charging if temperature exceeds a programmed range. Three programmable safety timers limit the precharge,
constant current, and total charge times.
For power management, the TWL2214CA device includes six low-dropout linear voltage regulators. One regulator is driven from the device power-on/-off logic and incorporates a microcontroller
reset function. Five low-noise regulators include individually programmable output voltage and enable-disable. The TWL2214CA device can be powered from a battery or from an ac adapter. When
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