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RT9451 Fiches technique(PDF) 32 Page - Richtek Technology Corporation

No de pièce RT9451
Description  Switch-Mode Single Cell Li-ion Battery Charger with USB OTG
PDF  37 Pages
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Fabricant  RICHTEK [Richtek Technology Corporation]
Site Internet  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT9451 Fiches technique(HTML) 32 Page - Richtek Technology Corporation

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RT9451
32
DS9451-00
September 2013
www.richtek.com
©
Copyright
2013 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
Figure 3. Charging I-V Curve
Figure 4. Safety Timer
Charge
Start
In T32min Mode
Any I
2
C ?
In T32sec mode
> 32 min ?
Timer Fault
Mode is Controlled
by OTG Pin
Mode is Controlled by I
2
C
Any I
2
C in
32 sec ?
No
Yes
Yes
No
No
Yes
Figure 5. POR Reset
Time
Output Voltage
Output Current
VShort
Pre-Charge
CC
VRECH
IShort
IEOC
Fast-Charge
Constant
Voltage
Charge
Termination
Re-Charge
VIN > 2.4V
and
VBATS > 2.4V ?
Charge Configure
(I
2
C is Programmable)
VIN > 3.3V ?
Power On
Clean I
2
C
Any State
If VIN < 2.4V and
VBATS < 2.4V
Any State
If Time Fault
No
Yes
Yes
No



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