BQ24630 Datasheet, PDF (6/33 Pages) Texas Instruments – Stand-Alone Synchronous Switch-Mode Lithium Phosphate Battery Charger with System Power Selector and Low Iq

bq24630
SLUS894 – JANUARY 2010
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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
Deglitch time for Temperature Out of
Range Detection
V_TS > V_LTF, or V_TS < V_TCO, or V_TS < V_HTF
400
Deglitch time for Temperature in Valid
Range Detection
V_TS < V_LTF – V_{LTF_HYS} or V_TS >V_TCO, or V_TS > V_HTF
20
Deglitch time for current reduction to
I_CHARGE/8 due to warm or cool temperature
V_TS > V_COOL, or V_TS < V_WARM
25
Deglitch time to charge at I_CHARGE from
I_CHARGE/8 when resuming from warm or
V_TS < V_COOL - V_{COOL_HYS}, or V_TS > V_WARM - V_{WARM_HYS}
25
cool temperatures
Charge current due to warm or cool
temperatures
V_COOL < V_TS < V_LTF, or V_WARM < V_TS < V_HTF, or V_WARM <
V_TS < V_TCO
CHARGE OVER-CURRENT COMPARATOR (CYCLE-BY-CYCLE)
I_CHARGE
/8
Current rising, in non-synchronous mode, mesure on
Charge over-current falling threshold
V_(SRP-SRN), V_SRP < 2 V
Current rising, as percentage of V_{(IREG_CHG)}, in
V_OC
Charge over-current threshold floor
synchronous mode, V_SRP > 2.2V
Minimum OCP threshold in synchronous mode, measure
on V_(SRP-SRN), V_SRP > 2.2V
Charge over-current threshold ceiling
Maximum OCP threshold in synchronous mode, measure
on V_(SRP-SRN), V_SRP > 2.2V
CHARGE UNDER-CURRENT COMPARATOR (CYCLE-BY-CYCLE)
45.5
160%
50
180
V_ISYNSET
Charge under-current falling threshold
BATTERY SHORTED COMPARATOR (BATSHORT)
Switch from SYNCH to NON-SYNCH, V_SRP > 2.2V
1
5
9
V_BATSHT
BAT Short falling threshold, forced
non-synchronous mode
V_SRP falling
2
V_{BATSHT_HYS} BAT short rising hysteresis
200
V_{BATSHT_DEG} Deglitch on both edge
1
LOW CHARGE CURRENT COMPARATOR
V_LC
Average low charge current falling
threshold
Measure on V_(SRP-SRN), forced into non-synchronous
mode
1.25
V_{LC_HYS}
Low charge current rising hysteresis
V_{LC_DEG}
Deglitch on both edge
VREF REGULATOR
1.25
1
V_{VREF_REG}
VREF regulator voltage
I_{VREF_LIM}
VREF current limit
REGN REGULATOR
V_VCC > V_UVLO, ( 0 – 35mA load)
V_VREF = 0 V, V_VCC > V_UVLO
3.267
35
3.3 3.333
V_{REGN_REG}
I_{REGN_LIM}
TTC INPUT
REGN regulator voltage
REGN current limit
V_VCC > 10 V, CE = HIGH (0 – 40mA load)
V_REGN = 0 V, V_VCC > V_UVLO
5.7
6.0
6.3
40
T_PRECHG
T_CHARGE
K_TTC
Precharge safety timer range⁽¹⁾
Fast charge saftey timer range, with +/-
10% accuracy⁽¹⁾
Fast charge timer accuracy⁽¹⁾
Timer multiplier
TTC low threshold
Precharge time before fault occurs
Tchg = C_TTC × K_TTC
0.047 mF ≤ C_TTC ≤ 0.47 mF
V_TTC below this threshold disables the safety timer and
termination
1440
1
–10%
1800
1.4
2160
10
10%
0.4
TTC comparator high threshold
1.5
TTC comparator low threshold
1
TTC source/sink current
45
50
55
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
150
V_ACN > 5V
20
V_{BATDRV_REG} = V_ACN – V_BATDRV when V_ACN > 5V and
BATFET is on
4.2
7
UNIT
ms
ms
ms
ms
mV
mV
mV
mV
V
mV
ms
mV
mV
ms
V
mA
V
mA
sec
Hr
min/nF
V
V
V
mA
Ω
kΩ
V
(1) Verified by design
6
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