BQ24616 Datasheet, PDF (7/34 Pages) Texas Instruments – JEITA Guideline Compatible Stand-Alone Synchronous Switch-Mode Li-Ion or Li-Polymer Battery Charger with System Power Selector and Low Iq

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SLUSA49A – APRIL 2010 – REVISED MAY 2010
ELECTRICAL CHARACTERISTICS (continued)
5.0V ≤ V(VCC) ≤ 28V, 0°C < T_J < +125°C, typical values are at T_A = 25°C, with respect to GND (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
CHARGE UNDER-CURRENT COMPARATOR (CYCLE-BY-CYCLE)
V_ISYNSET
Charge under-current falling threshold
BATTERY SHORTED COMPARATOR (BATSHORT)
Switch from SYNCH to NON-SYNCH, V_SRP > 2.2V
1
5
9 mV
V_BATSHT
BAT Short falling threshold, forced
non-syn mode
V_SRP falling
2
V
V_{BATSHT_HYS}
BAT short rising hysteresis
V_{BATSHT_DEG}
Deglitch on both edge
LOW CHARGE CURRENT COMPARATOR
200
mV
1
ms
Low charge current (average) falling
V_LC
threshold to force into non-synchronous Measure on V_(SRP-SRN)
mode
1.25
mV
V_{LC_HYS}
Low charge current rising hysteresis
V_{LC_DEG}
Deglitch on both edge
VREF REGULATOR
1.25
mV
1
ms
V_{VREF_REG}
VREF regulator voltage
I_{VREF_LIM}
VREF current limit
REGN REGULATOR
V_VCC > V_UVLO, (0-35mA load)
V_VREF = 0V, V_VCC > V_UVLO
3.267
35
3.3 3.333
V
mA
V_{REGN_REG}
REGN regulator voltage
I_{REGN_LIM}
REGN current limit
TTC INPUT AND SAFETY TIMER
T_PRECHG
Precharge safety timer range⁽¹⁾
T_CHARGE
Fast charge safety timer range, with +/-
10% accuracy⁽¹⁾
V_VCC > 10V, CE = HIGH, (0-40mA load)
V_REGN = 0V, V_VCC > V_UVLO, CE = HIGH
Precharge time before fault occurs
Tchg = C_TTC × K_TTC
5.7
6.0
6.3
V
40
mA
1440 1800 2160 sec
1
10 Hr
K_TTC
Fast charge timer accuracy⁽¹⁾
Timer multiplier
TTC low threshold
0.01 mF ≤ C_TTC ≤ 0.11 mF
–10%
V_TTC below this threshold disables the safety timer and
termination
10%
5.6
min/nF
0.4
V
TTC oscillator high threshold
1.5
V
TTC oscillator low threshold
1
V
TTC source/sink current
45
50
55 mA
BATTERY SWITCH (BATFET) DRIVER
R_{DS_BAT_OFF}
R_{DS_BAT_ON}
V_{BATDRV_REG}
BATFET turn-off resistance
BATFET turn-on resistance
BATFET drive voltage
V_ACN > 5V
V_ACN > 5V
V_{BATDRV_REG} = V_ACN – V_BATDRV when V_ACN > 5V and
BATFET is on
4.2
150
Ω
20 kΩ
7
V
AC SWITCH (ACFET) DRIVER
R_{DS_AC_OFF}
R_{DS_AC_ON}
V_{ACDRV_REG}
ACFET turn-off resistance
ACFET turn-on resistance
ACFET drive voltage
V_VCC > 5V
V_VCC > 5V
V_{ACDRV_REG} = V_VCC – V_ACDRV when V_VCC > 5V and
ACFET is on
4.2
30
Ω
20 kΩ
7
V
AC / BAT MOSFET DRIVERS TIMING
Driver dead time
Dead time when switching between AC and BAT
10
ms
(1) Verified by design
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