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RT5021 データシート(PDF) 43 Page - Richtek Technology Corporation

部品番号 RT5021
部品情報  Channels DC/DC PMU with Li-ion Battery Charger
PDF  67 Pages
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メーカー  RICHTEK [Richtek Technology Corporation]
ホームページ  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT5021 データシート(HTML) 43 Page - Richtek Technology Corporation

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RT5021
43
DS5021-01 April 2013
www.richtek.com
Copyright
2013 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
©
APPM Mode
Once the sum of the charging current and system load current is higher than the maximum input current limit, the SYS
pin voltage will be reduced. When the SYS pin voltage is reduced to VAPPM, the RT5021 will automatically operate in
APPM mode. In this mode, the charging current is reduced while the SYS current is increased to maintain system
output. In APPM mode, the battery termination function is disabled.
APPM Profile
1.5A Mode :
ISYS
VSYS
IVIN
IBAT
T1, T7
0
SYS Regulation Voltage
CHG_MAX
CHG_MAX
T2, T6
< IVIN_OC − CHG_MAX
SYS Regulation Voltage
ISYS + CHG_MAX
CHG_MAX
T3, T5
> IVIN_OC − CHG_MAX < IVIN_OC Auto Charge Voltage Threshold
VIN_OC
VIN_OC − ISYS
T4
> IVIN_OC
VBAT − IBAT x RDS(ON)
VIN_OC
ISYS − IVIN_OC
1A
0
-1A
2A
3A
-2A
-3A
5V
5V
4.15V
4.2V
IBAT
ISYS
IVIN
T1
T2
T3
T4
T5
T6
T7
VBAT
VIN
VSYS
VAPPM
500mA Mode :
0.25A
0
-0.25A
0.5A
0.75A
-0.5A
-0.75A
5V
4.15V
4.2V
IBAT
ISYS
IUSB
T1
T2
T3
T4
T5
T6
T7
VBAT
VUSB
VSYS
VAPPM
5V



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