BQ24298_15 Datasheet, PDF (6/51 Pages) Texas Instruments – bq24298 I2C Controlled 3A Single Cell USB Charger With Narrow VDC Power Path Management and Adjustable Voltage USB OTG

bq24298
SLUSC59 – APRIL 2015
www.ti.com
7.3 Recommended Operating Conditions
V_IN
I_SYS
V_BAT
I_BAT
Input voltage
Output current (SYS)
Battery voltage
Fast charging current
Discharging current with internal MOSFET
MIN
MAX
UNIT
3.9
6.2 ⁽¹⁾
V
3.5
A
4.4
V
3
A
5.5
A
T_A
Operating free-air temperature range
–40
85
°C
(1) The inherent switching noise voltage spikes should not exceed the absolute maximum rating on either the BTST or SW pins. A tight
layout minimizes switching noise.
7.4 Thermal Information
THERMAL METRIC⁽¹⁾
RTW (WQFN)
24 PIN
UNIT
R_θJA
R_θJCtop
R_θJB
ψ_JT
ψ_JB
R_θJCbot
Junction-to-ambient thermal resistance
Junction-to-case (top) thermal resistance
Junction-to-board thermal resistance
Junction-to-top characterization parameter
Junction-to-board characterization parameter
Junction-to-case (bottom) thermal resistance
32.2
29.8
9.1
°C/W
0.3
9.1
2.2
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.
7.5 Electrical Characteristics
V_{VBUS_UVLOZ} < V_VBUS < V_ACOV and V_VBUS > V_BAT + V_SLEEP, T_J = –40°C to 125°C and T_J = 25°C for typical values (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
QUIESCENT CURRENTS
V_VBUS < V_UVLO, VBAT = 4.2 V, leakage between BAT and
VBUS, T_J < 85°C
I_BAT
Battery discharge current (BAT, SW, SYS)
High-Z Mode, or no VBUS, BATFET disabled (REG07[5] =
1), –40°C – 85°C
5
µA
16
20 µA
High-Z Mode, or no VBUS, BATFET enabled (REG07[5] =
0), –40°C – 85°C
32
55 µA
I_VBUS
I_BOOST
Input supply current (VBUS)
Battery discharge current in boost mode
V_VBUS = 5 V, High-Z mode, No battery
V_VBUS > V_UVLO, V_VBUS > V_BAT, converter not switching
V_VBUS > V_UVLO, V_VBUS > V_BAT, converter switching, V_BAT =
3.2 V, I_SYS = 0 A
V_VBUS > V_UVLO, V_VBUS > V_BAT, converter switching, charge
disable, V_BAT = 3.8 V, I_SYS = 100 µA
VBAT = 4.2 V, Boost mode, I_VBUS = 0 A, converter
switching
15
30 µA
1.5
3 mA
4
mA
3.5
mA
3.5
mA
VBUS/BAT POWER UP
V_{VBUS_OP}
V_{VBUS_UVLOZ}
V_SLEEP
V_SLEEPZ
V_ACOV
V_{ACOV_HYST}
V_{BAT_UVLOZ}
V_{BAT_DPL}
V_{BAT_DPL_HY}
V_VBUSMIN
I_BADSRC
VBUS operating voltage
VBUS for active I²C, no battery
Sleep mode falling threshold
Sleep mode rising threshold
VBUS over-voltage rising threshold
VBUS over-voltage falling hysteresis
Battery for active I²C, no VBUS
Battery depletion threshold
Battery depletion rising hysteresis
Bad adapter detection threshold
Bad adapter detection current source
V_VBUS rising
V_VBUS falling, V_VBUS-VBAT
V_VBUS rising, V_VBUS-VBAT
V_VBUS rising
V_VBUS falling
V_BAT rising
V_BAT falling
V_BAT rising
V_VBUS falling
3.9
6.2 V
3.6
V
35
80
120 mV
170
250
350 mV
6.2
6.6 V
250
mV
2.3
V
2.4
2.6 V
200
mV
3.8
V
30
mA
6
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