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RT9451 Datasheet(PDF) 33 Page - Richtek Technology Corporation

Part # RT9451
Description  Switch-Mode Single Cell Li-ion Battery Charger with USB OTG
PDF  37 Pages
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Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT9451 Datasheet(HTML) 33 Page - Richtek Technology Corporation

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RT9451
33
DS9451-00
September 2013
www.richtek.com
©
Copyright
2013 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
Figure 6. High Impedance Mode
Delay 16ms
Enable Adaptor Detection
(Enable Input Current Sink
& Start 32ms Timer)
VIN > VIN(MIN) ?
Bad Adaptor Detected
(Disable Input Current Sink)
Delay tINT = 2s
32ms Timer Expired ?
Good Adaptor Detected
(Disable Input Current Sink)
Power On
CHARGE
VIN > VUVLO ?
VIN > VUVLO ?
Yes
Yes
Yes
Yes
No
No
No
No
VIN(MIN)
Adaptor
Detection Control
32ms Deglitch
VIN
+
-
HZ = 1 &
OTG is Inactive
High Impedance
HZ = 0,
OPA = 0
Any State
Figure 7. Input Power Source Detection



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