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参数资料
| 型号： | BQ24003RGWTR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC20 |
| 封装： | 5 X 5 MM, PLASTIC, QFN-20 |
| 文件页数： | 7/31页 |
| 文件大小： | 1000K |
| 代理商： | BQ24003RGWTR |
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bq24001
bq24002
bq24003
SLUS462E SEPTEMBER 2000 REVISED NOVEMBER 2004
www.ti.com
15
If the charger designs incorporate a thermistor, the resistor
divider RT1 and RT2 is calculated by using the following
two equations.
First, calculate RT2.
RT2
+
V
B RH RC
1
V
C
* 1
V
H
R
H
V
B
V
H
* 1 * R
C
V
B
V
C
* 1
then use the resistor value to find RT1.
RT1
+
V
B
V
C
* 1
1
RT2 )
1
R
C
Where:
VB = VCR (bias voltage)
RH = Resistance of the thermistor at the desired hot trip
threshold
RC = Resistance of the thermistor at the desired cold trip
threshold
VH = VP2 or the lower APG trip threshold
VC = VP2 or the upper APG trip threshold
RT1 = Top resistor in the divider string
RT2 = Bottom resistor in the divider string
GND
V
TP2
V
TP1
Vcc
Normal Temp Range
Temp Fault
Figure 17. Temperature Threshold
Figure 18. APG Sensing Circuit
U1
N/C
120
IN
OUT
219
IN
OUT
318
VCC
VSENSE
417
ISNS
AGND
516
N/C
STAT2
615
APG/THM
STAT1
714
VSEL
CR
912
EN
TMR SEL
813
GND
N/C
10
11
DC
DC+
VCC
bq24002PWP
R1
R2
Values of resistors R1 and R2 can be calculated using the following equation:
V
APG + VCC
R2
(R1
) R2)
where VAPG is the voltage at the APG/THM pin.
Current Regulation
The bq2400x provides current regulation while the battery-pack voltage is less than the regulation voltage. The current
regulation loop effectively amplifies the error between a reference signal, Vilim, and the drop across the external sense
resistor, RSNS.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| BQ24004 | 制造商:TI 制造商全称:Texas Instruments 功能描述:TWO-CELL Li-ION CHARGE MANAGEMENT IC FOR PDAs AND INTERNET APPLIANCES |
| BQ24004_12 | 制造商:TI 制造商全称:Texas Instruments 功能描述:TWO-CELL Li-ION CHARGE MANAGEMENT IC |
| BQ24004EVM | 功能描述:电源管理IC开发工具 2-cell Li-Ion chrgr w/ integrated FET RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| BQ24004PWP | 功能描述:电池管理 Li-Ion Linear Charge Management IC RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| BQ24004PWP | 制造商:Texas Instruments 功能描述:IC's |
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