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參數(shù)資料
| 型號： | BQ24630RGET |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHED CAPACITOR CONVERTER, PQCC24 |
| 封裝： | 4 X 4 MM, GREEN, PLASTIC, VQFN-24 |
| 文件頁數(shù)： | 6/33頁 |
| 文件大?。?/td> | 1893K |
| 代理商： | BQ24630RGET |
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Precharge
Time
FastchargeSafety Time
Precharge
Current
Regulation
Phase
FastchargeCurrent
RegulationPhase
FastchargeVoltage
RegulationPhase
Termination
Charge
Voltage
Charge
Current
RegulationCurrent
RegulationVoltage
V
RECH
V
LOWV
I
&I
PRECH
TERM
BAT
R1
V
= 1.8 V
1
R2
é
ù
+
ê
ú
ISET1
CHARGE
SR
V
I
=
20
R
SLUS894 – JANUARY 2010
www.ti.com
DETAILED DESCRIPTION
Figure 17. Typical Charging Profile
BATTERY VOLTAGE REGULATION
The bq24630 uses a high accuracy voltage bandgap and regulator for the high accuracy charging voltage. The
charge voltage is programmed via a resistor divider from the battery to ground, with the midpoint tied to the VFB
pin. The voltage at the VFB pin is regulated to 1.8V, giving Equation 1 for the regulation voltage:
(1)
where R2 is connected from VFB to the battery and R1 is connected from VFB to GND
BATTERY CURRENT REGULATION
The ISET1 input sets the maximum fast charging current. Battery charge current is sensed by resistor RSR
connected between SRP and SRN. The full-scale differential voltage between SRP and SRN is 100mV. Thus, for
a 10m
sense resistor, the maximum charging current is 10A. Equation 2 is for charge current
(2)
VISET1, the input voltage range of ISET1 is between 0 and 2V. The SRP and SRN pins are used to sense voltage
across RSR with default value of 10m. However, resistors of other values can also be used. A larger sense
resistor will give a larger sense voltage, a higher regulation accuracy; but, at the expense of higher conduction
loss.
14
Copyright 2010, Texas Instruments Incorporated
Product Folder Link(s): bq24630
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| BQ24630RGET | 制造商:Texas Instruments 功能描述:BATTERY CHARGER IC |
| BQ24640EVM | 功能描述:電源管理IC開發(fā)工具 Eval Mod for BQ24640 RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| BQ24640RVAR | 功能描述:電池管理 Hi Eff Synch Sw-Mode Batt Charge Cntrlr RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| BQ24640RVAT | 功能描述:電池管理 Hi Eff Synch Sw-Mode Batt Charge Cntrlr RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| BQ24650EVM-639 | 功能描述:電源管理IC開發(fā)工具 BQ24650 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
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