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R2A20050ANS Datasheet(PDF) 11 Page - Renesas Technology Corp

Part # R2A20050ANS
Description  Lithium-ion battery charger control IC
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

R2A20050ANS Datasheet(HTML) 11 Page - Renesas Technology Corp

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R2A20050ANS
Page 11 of 14
Rev.1.0
May 7 ,2013
R03DS0071EJ0100
Built-in erroneous detection protection
The judgment result is decided delayed by the built-in erroneous detection protection circuit.
Each detection delay time is set by the internal clock.
Refer to Page-5 “Detection time”about each detection time.
LED control block
LED lighting specification is as below.
LED lighting table
Mode
LED
Standby
OFF
Under charge
ON
Charge completion
OFF
Recharge
ON
Charge error
Blink
Battery temperature protection
OFF
Item
Symbol
Reference value
Adaptor detection time 1 (when rising)
Tadp1
8msec x 4 times = 32msec
Adaptor detection time 2 (when falling)
Tadp2
8msec x 4 times = 32msec
VCC/BAT voltage comparison
-
Non detection time (judged immediately)
Battery connect detection time
Tcon
32msec x 4 times = 128msec
Quick charge start voltage detection time
Tqstart
32msec x 4 times = 128msec
Charge completion current detection time
Tifc
64msec x 4 times = 256msec
Charge completion voltage detection time *)
Tvfc
32msec x 4 times = 128msec
Recharge start voltage detection time
Trechg
64msec x 4 times = 256msec
Battery overvoltage detection time
Tov
32msec x 4 times = 128msec
Forced charge time
Tistart
512msec
OFF time after forced charge
Toff
128msec
Battery temperature detection time
Tpro
32msec x 4 times = 128msec
Each detection time (Rosc=100kohm)
*) In the case of Battery voltage > 2.9V(completed normally)
Rosc resistor(Kohm)
Oscillation frequency (KHz)
1000
7.5
510
14.1
300
23.5
200
33.9
100
64.0
51
109.3
If the oscillation frequency is changed, each timer and detection time will also change.
(Each time is to change by the change rate of oscillation frequency.)
The precision of each parameter is +15%(reference value) except when using 100kohm resistor for Rosc.
IC operates at fosc=650kHz when Rosc terminal is shortcircuited to GND.
Reference: Oscillation frequency setting (subject to change)


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