BQ24030-Q1 Datasheet, PDF (7/34 Pages) Texas Instruments – SINGLE-CHIP CHARGE AND SYSTEM POWER-PATH MANAGEMENT IC

bq24030-Q1
bq24031-Q1
www.ti.com.................................................................................................................................................... SLUS793B – APRIL 2008 – REVISED OCTOBER 2009
ELECTRICAL CHARACTERISTICS (continued)
over junction temperature range (0°C ≤ T_J ≤ 125°C) and recommended supply voltage range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
Timers
K_(TMR)
R_(TMR) ⁽¹⁶⁾
t_(PRECHG)
I_(FAULT)
Timer set factor
External resistor limits
Precharge timer
Timer fault recovery pullup
from OUT to BAT
t_(CHG) = K_(TMR) × R_(TMR)
0.313
30
0.09 t_(CHG)
0.360
0.10 t_(CHG)
1
0.414
100
0.11 t_(CHG)
Charger Sleep Thresholds (ACPG and USBPG Thresholds, Low to Power Good)
V_(SLPENT) ⁽¹⁷⁾
Sleep-mode entry
threshold
V_(UVLO) ≤ V_I(BAT) ≤ V_O(BAT-REG), No t_(BOOT-UP) delay
V_VCC ≤
V_I(BAT)
+ 125 mV
V_(SLPEXIT) ⁽¹⁷⁾
Sleep-mode exit threshold V_(UVLO) ≤ V_I(BAT) ≤ V_O(BAT-REG), No t_(BOOT-UP) delay
V_VCC ≥
V_I(BAT)
+ 190 mV
t_(DEGL)
Deglitch time for sleep
mode ⁽¹⁸⁾
R_(TMR) = 50 kΩ, V_(AC) or V_(USB) or decreasing below
threshold, 100-ns fall time, 10-mV overdrive
22.5
Start-Up Control and USB Boot-Up
t_(BOOT-UP)
Boot-up time
On the first application of USB input power or AC input
with PSEL low
120
150
180
Switching Power Source Timing
t_SW-BAT
t_SW-AC/USB
Switching power source
from inputs (AC or USB) to
battery
Switching from AC to USB,
or, USB to AC by input
source removal. ⁽¹⁹⁾
t_SW-PSEL
Switching from AC to USB,
or USB to AC by toggling
PSEL
Thermal Shutdown Regulation⁽²⁰⁾
Only AC power or USB power applied,
Measure from [xxPG: low to high to I(xx) > 5 mA],
xx = AC or USB I(OUT) = 100 mA, R_TRM = 50 K
Measure from
I(AC) < 5 mA to I(USB) > 5 mA or
I(USB) < 5 mA to I(AC) > 5 mA,
I_(OUT) = 100 mA, R_TMR = 50 kΩ,
ISET2 = high, R_OUT > 15 Ω, V_DPPM = 2.5 V
Measure from
I(AC) < 5 mA to I(USB) > 5 mA or
I(USB) < 5 mA to I(AC) > 5 mA,
I_(OUT) = 100 mA, R_TMR = 50 kΩ,
ISET2 = high, R_OUT > 15 Ω, V_DPPM = 2.5 V
50
100
50
100
T_(SHTDWN)
T_J(REG)
Temperature trip
Thermal hysteresis
Temperature regulation
limit
T_J (Q1 and Q3 only)
T_J (Q1 and Q3 only)
T_J (Q2)
155
30
115
135
UVLO
V_(UVLO)
Undervoltage lockout
Hysteresis
Decreasing V_CC
2.45
2.50
2.65
27
UNIT
s/Ω
kΩ
s
kΩ
V
V
ms
ms
μs
μs
μs
°C
°C
°C
V
mV
(16) To disable the fast-charge safety timer and charge termination, tie TMR to the LDO pin. Tying the TMR pin high changes the timing
resistor from the external value to an internal 50 kΩ ±25%, which can add an additional tolerance to any timed spectification. The TMR
pin normally regulates to 2.5 V when the charge current is not restricted by the DPPM or thermal feedback loops. If these loops become
active, the TMR pin voltage will be reduced proportionally to the reduction in charge current and the clock frequency will be reduced by
the same percentage (timed durations will count down slower, extending their time). The TMR pin is clamped at 0.80 V, for a maximum
time extension of 2.5 V ÷ 0.8 V × 100 = 310%.
(17) The IC is considered in sleep mode when both AC and USB are absent (ACPG = USBPG = open drain).
(18) Does not declare sleep mode until after the deglitch time and implement the needed power transfer immediately according to the
switching specification.
(19) The power handoff is implemented once the PG pin goes high (removed sources PG), which is when the removed source drops to the
battery voltage. If the battery voltage is critically low, the system may lose power unless the system takes control of the PSEL pin and
switches to the available power source prior to shutdown. The USB source often has less current available; so, the system may have to
reduce its load when switching from AC to USB.
(20) Reaching thermal regulation reduces the charging current. Battery supplement current is not restricted by either thermal regulation or
shutdown. Input power FETs turn off during thermal shutdown. The battery FET is only protected by a short-circuit limit which typically
does not cause a thermal shutdown (input FETs turning off) by itself.
Copyright © 2008–2009, Texas Instruments Incorporated
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