Datasheet
ELECTRICAL CHARACTERISTICS – POWER PATH AND CHARGE MANAGEMENT (Continued)
TPS65820
SLVS663B – MAY 2006 – REVISED APRIL 2008 ..............................................................................................................................................................
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Over recommended operating conditions (typical values at T
J
= 25 ° C), application circuit as in Figure 3 (unless otherwise
noted).
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
BATTERY RECHARGE DETECTION
V
RCH
New charge cycle starts if V(BAT) < V
O(BATREG)
– V
RCH
, after
Recharge threshold voltage 80 100 130 mV
termination was detected
t
DGL(RCH)
Deglitch time for recharge detection R
TMR
= 50 k Ω 22.5 ms
DPPM FUNCTION
V
DPPM
DPPM regulation point range V
(DPPM)
= R
DPPM
× K
DPPMM
x I
O(DPPM)
2.6 4.4 V
I
O(DPPM)
DPPM pin current source AC or USB present 95 100 105 µ A
K
DPPM
DPPM scaling factor 1.139 1.15 1.162
Status bit set indicating DPPM loop active after deglitch time,
t
DGL(DPPM)
DPPM de-glitch time 500 µ s
R
TMR
= 50 k Ω
PACK TEMPERATURE SENSING
V
LTF
Low temperture threshold Pack low temperature fault at V(TS) > V
LTF
2.465 2.500 2.535 V
V
HTF
High temperture threshold Pack low temperature fault at V(TS) < V
HTF
0.485 0.500 0.515 V
I
O(TS)
Temperature sense current source Thermistor bias current 18.8 20 21.2 µ A
Deglitch time for temperature fault R(TMR) = 50 k Ω ,
t
DLG(TFAULT)
22.5 ms
detection V(TS) > V
LTF
OR V(TS) < V
HTF
CHARGE AND PRECHARGE SAFETY TIMER
Charge safety timer programmed Safety timer range, thermal/DPPM loop not active,
t
CHG
3 5 10 hours
value t
CHG
= R
TMR
× K
TMR
K
TMR
Charge timer set factor 0.313 0.360 0.414 s/ Ω
Total elapsed time when DPPM or fast charge on, t
CHGADD
is the maximum add-on time added to
t
CHGADD
2 t
CHG
hours
thermal loop are active t
CHG
Precharge safety timer programmed Pre charge safety timer range, thermal/DPPM loop not active,
t
PRECHG
18 30 60 min
value t
PRECHG
= K
PRE
× R
TMR
× K
TMR
K
PRE
Precharge timer set factor 0.09 0.1 0.11
Total elapsed time when DPPM or Precharge on, t
PCHGADD
is the maximum add-on time added to 2 ×
t
PCHGADD
hours
thermal loop are active t
PRECHG
t
PRECHG
R
TMR
External timer resistor limits 30 100 k Ω
Internal resistor connected from OUT to BAT after safety timer
R
TMR(FLT)
Timer fault recovery pullup resistor 1 k Ω
timeout
THERMAL REGULATION LOOP
Charge current decreasesd and timer extended when T
J
>
T
THREG
Temperature regulation limit 115 135 ° C
T
THREG
CHARGER THERMAL SHUTDOWN
T
THCHG
Charger thermal shutdown Charger turned off when T
J
> T
THCHG
150 ° C
T
THCHGHYS
Charger thermal shutdown hysteresis 30 ° C
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