Datasheet

ELECTRICAL CHARACTERISTICS – POWER PATH AND CHARGE MANAGEMENT
TPS65820
SLVS663B – MAY 2006 – REVISED APRIL 2008 .............................................................................................................................................................. www.ti.com
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
VOLTAGE DETECTION THRESHOLDS
Input voltage detection AC detected at V(AC) – V(BAT) > V
IN(DT)
;
V
IN(DT)
190 mV
threshold USB detected at V(USB) – V(BAT) > V
IN(DT)
Input Voltage removal AC not detected at V(AC) – V(BAT) < V
IN(NDT)
;
V
IN(NDT)
125 mV
threshold USB not detected at V(USB) – V(BAT) < V
IN(NDT)
t
DGL(NDT)
Power not detected deglitch 22.5 ms
Supplement detection
V
SUP(DT)
Battery switch ON at V(BAT) – V(OUT) > V
SUP(DT)
60 mV
threshold
Supplement not detected
V
SUP(NDT)
Battery switch OFF at V(BAT) – V(OUT) < V
SUP(NDT)
20 mV
threshold
POWER PATH INTEGRATED MOSFETs CHARACTERISTICS
AC switch dropout voltage V
ACDO
= V(AC) – V(OUT); V(AC) = 4.75-V AC input current limit set to 2.75 A
V
ACDO
350 375 mV
(typ), I
O(OUT)
= 1 A
V
USBDO
= V(USB) – V(OUT); V(USB) = 4.6 V I(OUT) + I(BAT)= 0.5 A 175 190 mV
V
USBDO
USB switch dropout voltage
USB input current limit set to 2.75 A (typ)
I(OUT) + I(BAT)= 0.1 A 35 45 mV
Battery switch dropout
V
BATDODCH
V(BAT): 3 V → V
CH(REG)
, I(BAT) = – 1 A 60 100 mV
voltage, discharge
Battery switch dropout
V
BATDOCH
Charger on, V(BAT): 3 V → 4.2 V, I(BAT) = 1 A 60 100 mV
voltage, charge
POWER PATH INPUT CURRENT LIMIT
Selected Input current limit,
Selected input switch not in dropout, I
2
C settings : ISET2 = LO,
I
INP(LIM1)
80 100 mA
applies to USB input only
PSEL = LO
Selected Input current limit,
I
INP(LIM2)
400 500 mA
Selected input switch not in dropout, I
2
C settings: ISET2 = HI, PSEL = LO
applies to USB input only
Selected Input current limit,
Selected input switch not in dropout, I
2
C settings: ISET2 = HI OR LO,
I
INP(LIM3)
applies to either AC or USB 2.75 A
PSEL = HI
input
SYSTEM REGULATION VOLTAGE
V
SYS(REG)
= V(OUT), DPPM loop not active, selected input current limit not
V
SYS(REG)
Output regulation voltage 4.6 4.7 V
reached. Selected input voltage (AC or USB) > 5.1 V
POWER PATH PROTECTION AND RECOVERY FUNCTIONS
Input-to-output short-circuit
V
INOUTSH
AC and USB switches set to OFF if V(OUT) < V
INOUTSH
0.6 V
detection threshold
OUT short-circuit recovery
R
SH(USBSH)
V(OUT) < 1 V, internal resistor connected from USB to OUT 500 Ω
pullup resistor
OUT short-circuit recovery
R
SH(ACSH)
V(OUT) < 1 V, internal resistor connected from AC to OUT 500 Ω
pullup resistor
Overvoltage detection Rising voltage, overvoltage detected when V(AC) > V
OVP
or
6 6.5 6.8 V
threshold V(USB) > V
OVP
V
OVP
Overvoltage detection
Falling voltage, relative to detection threshold 0.1 V
hysteresis
Battery-to-output short-circuit
V
BATOUTSH
BAT switch set to OFF if V(BAT) – V(OUT)> V
BATOUTSH
200 mV
detection threshold
Battery-to-ouput short-circuit V
(DPPM)
< 1V, t
BLK(SHBAT)
= K
BLK(SHBAT)
× C
DPPM,
C
DPPM
capacitor is connected
K
BLK(SHBAT)
1 mS/nF
blanking time constant from DPPM pin to AGND1
OUT short-circuit recovery V
(BAT)
– V
(OUT)
> V
BATOUTSH
,
I
SH(BAT)
10 mA
pullup current source Internal current source connected between OUT and BAT
BAT short-circuit recovery V
(BAT)
< 1V,
R
SHBAT)
1 k Ω
resistor Internal resistor connected from OUT to BAT
Internal resistor connected from BAT to AGND1 when battery is not detected
R
DCH(BAT)
BAT pulldown resistor 500 Ω
by ANLG1
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