Datasheet

bq51050B
bq51051B
SLUSB42D –JULY 2012–REVISED JANUARY 2014 www.ti.com
ELECTRICAL CHARACTERISTICS
Over junction temperature range 0°C ≤ T
J
≤ 125°C and recommended supply voltage (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
UVLO
Under-voltage lock-out V
RECT
: 0V → 3V 2.6 2.7 2.8 V
Hysteresis on UVLO V
RECT
: 3V → 2V 250 mV
V
HYS-UVLO
Hysteresis on OVP V
RECT
: 16V → 5V 150 mV
V
RECT
Input over-voltage threshold V
RECT
: 5V → 16V 14.5 15 15.5 V
V
RECT-REG
(1)
V
RECT
regulation voltage 5.11 V
I
LOAD
Hysteresis for dynamic V
RECT
thresholds as a %
I
LOAD
I
LOAD
falling 5%
of I
ILIM
V
BAT
= 3.5 V,
V
TRACK
Tracking V
RECT
regulation above V
BAT
300 mV
I
BAT
≥ 500mA
V
RECT-REV
= V
BAT
– V
RECT
,
V
RECT-REV
Rectifier reverse voltage protection at the BAT(output) 8.3 9 V
V
BAT
= 10V
Rectifier under voltage protection, restricts I
BAT
at
V
RECT-DPM
3 3.1 3.2 V
V
RECT-DPM
QUIESCENT CURRENT
I
BAT
= 0, 0°C ≤ T
J
≤ 85°C 8 10 mA
Active chip quiescent current consumption from RECT
I
RECT
(in the prswireless power is present)
I
BAT
= 300mA, 0°C ≤ T
J
≤ 85°C 2 3 mA
Quiescent current at the BAT when wireless power is
I
Q
V
BAT
= 4.2V, 0°C ≤ T
J
≤ 85°C 12 20 µA
disabled(Standby)
ILIM SHORT PROTECTION
Highest value of I
LIM
resistor considered a fault (short).
R
ILIM
: 200 Ω → 50 Ω. I
BAT
latches off, cycle
R
ILIM-SHORT
120 Ω
power to reset
Monitored for I
BAT
> 100 mA
t
DGL-Short
Deglitch time transition from I
LIM
short to I
BAT
disable 1 ms
I
LIM-SHORT,OK
enables the I
LIM
short comparator when
I
LIM_SC
I
BAT
: 0 → 200 mA 110 145 165 mA
I
BAT
is greater than this value
I
LIM-SHORT,
OK
Hysteresis for I
LIM-SHORT,OK
comparator I
BAT
: 200 → 0 mA 30 mA
HYSTERESIS
Maximum I
BAT
that will be delivered for 1
I
BAT-CL
Maximum output current limit 2.4 A
ms when ILIM is shorted
BATTERY SHORT PROTECTION
V
BAT(SC)
BAT pin short-circuit detection/pre-charge threshold V
BAT
: 3 V → 0.5 V, no deglitch 0.75 0.8 0.85 V
V
BAT(SC)-HYS
V
BAT(SC)
hysteresis V
BAT
: 0.5 V → 3 V 100 mV
Source current to BAT pin during short-circuit
I
BAT(SC)
V
BAT
= 0V 12 18 22 mA
detection
PRECHARGE
V
LOWV
Pre-charge to fast charge transition threshold V
BAT
: 2 V → 4 V 2.9 3.0 3.1 V
V
LOWV
> V
BAT
> V
BAT(SC)
,
K
PRECHG
Pre-charge current as a percentage of I
BAT
18% 20% 23%
I
BAT
: 50 – 300 mA
t
pre-charge
Pre-charge timeout V
BAT
<V
LOWV
30 min
t
DGL1(LOWV)
De-glitch time, pre- to fast-charge 25 ms
t
DGL2(LOWV)
De-glitch time, fast- to pre-charge 25 ms
TIMERS
T
fast-charge
Fast-charge timer V
LOWV
< V
BAT
< V
BAT(REG)
36000 sec
T
pre-charge
Pre-charge timer V
BAT-SHORT
< V
BAT
< V
LOWV
1800 sec
OUTPUT
bq51050B 4.16 4.2 4.22
V
OREG
Regulated BAT(output) voltage I
BAT
= 1000 mA V
bq51051B 4.30 4.35 4.37
V
DO
Drop-out voltage, RECT to BAT I
BAT
= 1A 110 190 mV
K
ILIM
Current programming factor R
LIM
= K
ILIM
/ I
ILIM
290 300 320 AΩ
I
BAT
Battery charge current limit programming range 1500 mA
I
COMM-CL
Current limit during communication 330 390 420 mA
(1) V
RECT(REG)
is over ridden when rectifier fold back mode is active (V
RECT(REG)-TRACKING
).
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