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參數(shù)資料
| 型號(hào)： | MB3813 |
| 廠商： | Fujitsu Limited |
| 英文描述： | Lithium Ion Battery Charger DC/DC Converter IC (High Precision with Constant-current Function) |
| 中文描述： | 鋰離子電池充電器的DC / DC轉(zhuǎn)換器集成電路（高精度的恒流功能） |
| 文件頁數(shù)： | 16/22頁 |
| 文件大?。?/td> | 251K |
| 代理商： | MB3813 |
16
MB3813A/MB3833A/MB3843
I
METHOD OF SETTING THE CHARGING CURRENT
The charging current level (output limit current level) is set at the Vin2 pin (pin 8).
I
METHOD OF SETTING THE SOFT START TIME
At start up, the capacitor (Cs) connected to the CS pin (pin 11) begins charging. The error amplifier compares
the soft start setting voltage, which is proportional to the CS pin voltage, to the output feedback voltage and
produces a soft start by varying the ON duty at the OUT pin (pin 15). The soft start time can be determined
by the formula below.
Because the CS pin voltage is input to the error amplifier, the soft start time setting is not dependent on the
output current value.
I
ERROR AMP. BLOCK OVERSHOOT PROTECTION CIRCUIT
This built-in circuit responds to rapid fluctuations in charging current such as can occur when inserting or removing
a chargeable battery, by clamping an inverted input signal (-IN1 or -IN2) from the error amps (Error Amp.1 or
Error Amp.2) to suppress changes in output voltage.
I
CTL, SEL PIN EQUIVALENT CIRCUITS
IL (MAX) [A] =
Vin2 (V)
25
×
RS (
)
Charging current level (output limit current level) :
RS: output sensing resistance
Soft start time (time to output setting voltage VD) :
ts [s] = 2.5
×
CS [
μ
F]
7
10
CTL
V
CC
SEL
1.4 V
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MB3813A | Lithium Ion Battery Charger DC/DC Converter IC (High Precision with Constant-current Function) |
| MB3813APFV | Lithium Ion Battery Charger DC/DC Converter IC (High Precision with Constant-current Function) |
| MB3833APFV | Lithium Ion Battery Charger DC/DC Converter IC (High Precision with Constant-current Function) |
| MB3843 | Lithium Ion Battery Charger DC/DC Converter IC (High Precision with Constant-current Function) |
| MB3843PFV | Lithium Ion Battery Charger DC/DC Converter IC (High Precision with Constant-current Function) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MB3813A | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:Lithium Ion Battery Charger DC/DC Converter IC (High Precision with Constant-current Function) |
| MB3813APFV | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:Lithium Ion Battery Charger DC/DC Converter IC (High Precision with Constant-current Function) |
| MB3817 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:Switching Regulator Controller |
| MB3817_03 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:Switching Regulator Controller |
| MB3817PFV | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:Switching Regulator Controller |
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