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參數(shù)資料
型號(hào)： TPS65920A2ZCH
廠商： TEXAS INSTRUMENTS INC
元件分類： 消費(fèi)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(shù)： 102/115頁
文件大小： 1232K
代理商： TPS65920A2ZCH
Signalswing
limitingcircuit
Biasgenerator
andstartup
circuit
XI
XO
Signal
shaping
C1
C2
Y
Currentcontrol
circuitand
modeselection
XTAL
Externaltodevice
VBATOK
(1)
Internal
GND
Internal
GND
VBATOK
(1)
037-042
SWCS037G
– MAY 2008 – REVISED APRIL 2011
11.2.3.1 External Crystal Description
Figure 11-5 shows the 32-kHz oscillator block diagram with crystal in master mode.
NOTE: Switches close by default and open only if register access enables very-low-power mode when VBAT
< 2.7 V.
Figure 11-5. 32-kHz Oscillator Block Diagram In Master Mode With Crystal
CXIN and CXOUT represent the total capacitance of the printed circuit board (PCB) and components,
excluding the crystal. Their values depend on the datasheet of the crystal, the internal capacitors, and the
parallel capacitor. The frequency of the oscillations depends on the value of the capacitors. The crystal
must be in the fundamental mode of operation and parallel resonant.
NOTE
For the values of CXIN and CXOUT, see Table 14-1.
Table 11-4 lists the required electrical constraints.
Table 11-4. Crystal Electrical Characteristics
Parameter
Min
Typ
Max
Unit
Parallel resonance crystal frequency
32.768
kHz
Input voltage, Vin (normal mode)
1.0
1.3
1.55
V
Internal capacitor on each input (Cint)
10
pF
Parallel input capacitance (Cpin)
1
pF
Nominal load cap on each oscillator input CXIN and CXOUT(1)
CXIN = CXOUT = Cosc*2
– (Cint +
pF
Cpin)
Pin-to-pin capacitance
1.6
1.8
pF
(1)
Nominal load capacitor on each oscillator input defined as CXIN = CXOUT = Cosc*2
– (Cint + Cpin). Cosc is the load capacitor defined
in the crystal oscillator specification, Cint is the internal capacitor, and Cpin is the parallel input capacitor.
Copyright
2008–2011, Texas Instruments Incorporated
Clock Specifications
87
focus.ti.com: TPS65930/TPS65920
相關(guān)PDF資料
PDF描述
TPS65920BZCHR SPECIALTY CONSUMER CIRCUIT, PBGA139
TPS65920BZCH SPECIALTY CONSUMER CIRCUIT, PBGA139
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TPS65930A2ZCH SPECIALTY CONSUMER CIRCUIT, PBGA139
TPS65930BZCHR SPECIALTY CONSUMER CIRCUIT, PBGA139
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS65920A2ZCHR 功能描述:PMIC 解決方案 Int Pwr Mgmt IC RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel
TPS65920BZCH 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Int Pwr Mgmt IC RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
TPS65920BZCH 制造商:Texas Instruments 功能描述:Power Supply IC
TPS65920BZCHR 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Int Pwr Mgmt IC RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
TPS65921B1ZQZ 功能描述:PMIC 解決方案 Integrated Power Mgmt IC RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel
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