BQ24030 Datasheet, PDF (6/20 Pages) Texas Instruments – SINGLE-CHIP CHARGE AND SYSTEM POWER-PATH MANAGEMENT IC (bqTINYI)

bq24030, bq24032, bq24035
SLUS618 – AUGUST 2004
www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
over junction temperature range (0°C ≤ T_J≤ 125°C) and the recommended supply voltage range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
I_IL
Low-level input current, CE or
PSEL
-1
I_IH
I_IL
I_IH
t_(CE-HLDOFF)
TIMERS
High-level input current, CE or
PSEL
Low-level input current, ISET2
High-level input current, ISET2
Hold off time, CE
V_ISET2 = 0 V
V_ISET2 = V_CC
CE going low only
1
µA
-20
40
4
6
K_(TMR)
R_(TMR)
t_(PRECHG)
I_(FAULT)
Timer set factor
External resistor limits
Precharge timer
Timer fault recovery pull-up from
OUT to BAT
t_(CHG) = K_(TMR)× R_(TMR)
0.313
30
0.09 ×
t_(CHG)
0.360
0.01 ×
t_(CHG)
1
0.414 s/Ω
100 kΩ
0.11 ×
t_(CHG)
s
mA
CHARGER SLEEP THRESHOLDS
V_(SLPENT)
Sleep mode entry threshold
V_(SLPEXIT)
Sleep mode exit threshold
V_(UVLO)≤ V_I(BAT)≤ V_O(BAT-REG),
No t_(BOOT-UP) delay
V_(UVLO)≤ V_I(BAT)≤ V_O(BAT-REG),
No t_(BOOT-UP) delay
V_VCC≥
V_I(BAT)
+190 mV
V_VCC≤
V_I(BAT)
+125 mV
V
t_(DEGL)
Deglitch time for sleep mode⁽¹³⁾
R_(TMR) = 50 kΩ,
V_(AC) or V_(USB) or decreasing below
threshold, 100-ns fall time, 10-mv over-
drive
22.5
ms
START-UP CONTROL and USB BOOT-UP
t_(BOOT-UP)
Boot-up time
Upon the first application of USB input
power or AC input with PSEL low
120
150
180 ms
SWIITCHING POWER SOURCE TIMING
Switching power source from in-
puts (AC or USB) to battery
After ACPG or USBPG detection, low to
high (no (t_(BOOT-UP)) delay) or after CE hold
off time
50
Switching from AC to USB, or,
USB to AC by input source re-
moval. ⁽¹⁴⁾
After ACPG or USBPG detection, low to
high (no (t_(BOOT-UP)) delay)
100 ^µs
Switching from AC to USB, or
USB to AC by toggling PSEL
Toggling PSEL High to Low or Low to High
50
THERMAL SHUTDOWN REGULATION⁽¹⁵⁾
T_(SHTDWN)
T_J(REG)
UVLO
Temperature trip
Thermal hysteresis
Temperature regulation limit
T_J (Q1 and Q3 only)
T_J (Q1 and Q3 only)
T_J (Q2)
155
30
°C
115
135
V_(UVLO)
Undervoltage lockout
Hysteresis
Decreasing V_CC
2.45
2.50
2.65 V
27
mV
(13) Doesn’tdeclare sleep mode until after the deglitch time and implement the needed powertransfer immediately according to the switching
specification.
(14) The power handoff isimplemented once the PG pin goes goeshigh (removed source’s PG) which is when the removed source drops to
thebattery voltage. if the battery voltage is critically low the system may loosepower unless the system takes control of the PSEL pin and
switches to theavailable power source prior to shutdown. the USB source often has less currentavailable so the system may have to
reduce its load when switching from AC toUSB.
(15) Reaching thermalregulation reduces the charging current. Battery supplement current is notrestricted by either thermal regulation or
shutdown. Input power FETs turn offduring thermal shutdown. The battery FET is only protected by a short circuitlimit which typically
doesn't cause a thermal shutdown (input FETs turning off)by itself.
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