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參數資料
| 型號： | TPS65920BZCHR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PBGA139 |
| 封裝： | 10 X 10 MM, 0.65 MM PITCH, GREEN, PLASTIC, NFBGA-139 |
| 文件頁數： | 66/115頁 |
| 文件大小： | 1232K |
| 代理商： | TPS65920BZCHR |
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SWCS037G
– MAY 2008 – REVISED APRIL 2011
5
Real-Time Clock and Embedded Power Controller
The TPS65930 and TPS65920 devices contain an RTC to provide clock and timekeeping functions and an
EPC to provide battery supervision and control.
5.1
RTC
The RTC provides the following basic functions:
Time information (seconds/minutes/hours) directly in binary-coded decimal (BCD) code
Calendar information (day/month/year/day of the week) directly in BCD code
Interrupt generation periodically (1 second/1 minute/1 hour/1 day) or at a precise time (alarm function)
32-kHz oscillator drift compensation and time correction
Alarm-triggered system wake-up event
5.1.1
Backup Battery
The TPS65030 and TPS65920 devices device implement a backup mode in which a backup battery can
keep the RTC running to maintain clock and time information even if the main supply is not present. If the
backup battery is rechargeable, the device also provides a backup battery charger so it can be recharged
when the main battery supply is present.
The backup domain powers the following:
Internal 32.768-kHz crystal oscillator
RTC
Eight general-purpose (GP) storage registers
Backup domain low-power regulator (VBRTC)
5.2
EPC
The EPC provides five system states for optimal power use by the system, as listed in Table 5-1.
Table 5-1. System States
System State
Description
NO SUPPLY
The system is not powered by any battery.
BACKUP
The system is powered only with the backup battery and maintains
only the VBRTC supply.
WAIT-ON
The system is powered by the main battery and maintains only the
VRRTC supply. It can accept switch-on requests.
ACTIVE
The system is powered by the main battery; all supplies can be
enabled with full current capability.
SLEEP
The main battery powers the system; selected supplies are enabled,
but in low consumption mode.
Three categories of events can trigger state transitions:
Hardware events: Supply/battery insertion, wake-up requests, USB plug, and RTC alarm
Software events: Switch-off commands, switch-on commands, and sleep on commands
Monitoring events: Supply/battery level check, main battery removal, main battery fail, and thermal
shutdown
54
Real-Time Clock and Embedded Power Controller
Copyright
2008–2011, Texas Instruments Incorporated
focus.ti.com: TPS65930/TPS65920
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TPS65921B1ZQZ | 功能描述:PMIC 解決方案 Integrated Power Mgmt IC RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| TPS65921B1ZQZR | 功能描述:PMIC 解決方案 Integrated Power Mgmt IC RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| TPS65921BZQZ | 功能描述:PMIC 解決方案 Int Power Mgmt IC RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| TPS65921BZQZR | 功能描述:PMIC 解決方案 Int Power Mgmt IC RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| TPS65930A2ZCH | 功能描述:PMIC 解決方案 Int Pwr Mgmt IC RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
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