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參數(shù)資料
| 型號： | SM6781 |
| 廠商： | Seiko NPC Corporation |
| 英文描述： | MINIATURE POWER RELAY |
| 中文描述： | Ni-MH/Ni-Cd電池充電器IC |
| 文件頁數(shù)： | 7/10頁 |
| 文件大?。?/td> | 101K |
| 代理商： | SM6781 |
pemnr
realizes simple temperature control.
SM6781BV
NIPPON PRECISION CIRCUITS—7
–
V Detection Function
A
–
voltage, at which point the battery is deemed to be fully charged and quick charge
fi
nishes (valid for 1V <
V
BATT
< 2V).
V condition is detected when the BATT voltage (V
BATT
) falls 4mV (typ) or more below the peak battery
–
V Detection A/D Converter
The A/D converter employs double integration A/D conversion, and converts samples taken approximately
every 1.17 seconds.
–
V Detection Timing
The
–
ples. Consequently,
–
V detection and peak voltage detection are determined by the average value of 16 A/D converted sam-
V detection timing occurs approximately every 18 seconds (16-sample length).
Standby Mode
When the BATT input voltage exceeds the standby voltage V
STB
, the device enters standby mode.
In this mode, the maximum charging time timer,
–
reset to zero. At this time, the CHGN and LEDN outputs both become high impedance.
V detection prohibit timer, and peak voltage data are all
Charge Inhibit (INH)
When INH goes HIGH, charge mode operation stops. While INH is HIGH, the internal timer stops, CHGN
goes LOW and LEDN outputs 1Hz pulse (LEDN
fl
ashes). When INH goes LOW, the SM6781BV is restored to
Figure 3. Battery voltage change
Figure 4.
–
V detection and A/D convert
4mV
V detect
V
peak
Quick charge time
C
1.17sec
1
16
2
3
490ms max
A/D convert
15
16
Stop
Operation
Averaging
V detect
Peak hold
and compare
Peak hold
and compare
18.7sec
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SM6781BV | 制造商:NPC 制造商全稱:Nippon Precision Circuits Inc 功能描述:Ni-MH/Ni-Cd Battery Charger IC |
| SM68 | 制造商:MIC 制造商全稱:MIC GROUP RECTIFIERS 功能描述:SURFACE MOUNT TRANSIENT VOLTAGE SUPPRESSOR |
| SM6800A | 制造商:NPC 制造商全稱:Nippon Precision Circuits Inc 功能描述:Class-D Mono Amplifier for Mobile Telephones |
| SM6800AB | 制造商:NPC 制造商全稱:Nippon Precision Circuits Inc 功能描述:Class-D Mono Amplifier for Mobile Telephones |
| SM6801A | 制造商:NPC 制造商全稱:Nippon Precision Circuits Inc 功能描述:Class-D Mono Amplifier for Portable Device |
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