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參數(shù)資料
| 型號(hào)： | 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)： | 14/33頁 |
| 文件大?。?/td> | 1893K |
| 代理商： | BQ24630RGET |
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www.ti.com
SLUS894 – JANUARY 2010
For example, 103AT NTC thermistor is used to monitor the battery pack temperature. Select TCOOL = 0C, TWARM
= 60C. From the calculation and select standard 5% resistor value. We can get RT1 = 2.2kΩ, RT2 = 6.8kΩ, and
TCOLD is -17C (target -20C); THOT is 77C (target 75C), and TCUT-OFF is 86C (target 80C). A small RC filter is
suggested to protect TS pin from system-level ESD.
Timer Fault Recovery
The bq24630 provides a recovery method to deal with timer fault conditions. The following summarizes this
method:
Condition 1: The battery voltage is above the recharge threshold and a timeout fault occurs.
Recovery Method: The timer fault will clear when the battery voltage falls below the recharge threshold, and
battery detection will begin. Taking CE low or a POR condition will also clear the fault.
Condition 2: The battery voltage is below the RECHARGE threshold and a timeout fault occurs.
Recovery Method: Under this scenario, the bq24630 applies the IFAULT current to the battery. This small
current is used to detect a battery removal condition and remains on as long as the battery voltage stays below
the recharge threshold. If the battery voltage goes above the recharge threshold, the bq24630 disables the fault
current and executes the recovery method described in Condition 1. Taking CE low or a POR condition will also
clear the fault.
PG Output
The open drain PG(power good) output indicates whether the VCC voltage is valid or not. The open drain FET
turns on whenever bq24630 has a valid VCC input ( not in UVLO or ACOV or SLEEP mode). The PG pin can be
used to drive an LED or communicate to the host processor.
CE (Charge Enable)
The CE digital input is used to disable or enable the charge process. A high-level signal on this pin enables
charge, provided all the other conditions for charge are met (see Enabling and Disabling Charge). A high to low
transition on this pin also resets all timers and fault conditions. There is an internal 1 M
pulldown resistor on the
CE pin, so if CE is floated the charge will not turn on.
INDUCTOR, CAPACITOR, AND SENSE RESISTOR SELECTION GUIDELINES
The bq24630 provides internal loop compensation. With this scheme, best stability occurs when the LC resonant
(9)
Table 2 provides a summary of typical LC components for various charge currents
Table 2. Typical Inductor, Capacitor, and Sense Resistor Values as a Function of Charge Current
CHARGE CURRENT
2A
4A
6A
8A
10A
Output Inductor Lo
8.2 mH
5.6 mH
4.7 mH
Output Capacitor Co
20 mF
30 mF
40 mF
Sense Resistor
10 m
10 m
10 m
10 m
10 m
CHARGE STATUS OUTPUTS
The open-drain STAT1 and STAT2 outputs indicate various charger operations as shown in Table 3. These
status pins can be used to drive LEDs or communicate with the host processor. Note that OFF indicates that the
open-drain transistor is turned off.
Copyright 2010, Texas Instruments Incorporated
21
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(píng)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(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
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