BQ24140_14 Datasheet, PDF (4/39 Pages) Texas Instruments – Integrated Dual-Input Switch-Mode One-Cell Li-Ion Charger with Full USB Compliance and USB-OTG Support

bq24140
SLUSAO5 – OCTOBER 2011
www.ti.com
THERMAL INFORMATION
THERMAL METRIC⁽¹⁾
bq24140
WCSP PACKAGE
UNITS
30 PINS
θ_JA
θ_JCtop
θ_JB
ψ_JT
ψ_JB
θ_JCbot
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
79.5
0.3
44.4
°C/W
0.3
44.4
n/a
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.
RECOMMENDED OPERATING CONDITIONS
VBUS Supply voltage
VIN
Supply voltage
MIN NOM MAX UNIT
4.0
6 ⁽¹⁾ V
4.0
9⁽¹⁾ V
T_J
Operating junction temperature range
–40
125 °C
(1) The inherent switching noise voltage spikes should not exceed the absolute maximum rating on either the BOOT or SW pins. A tight
layout minimizes switching noise.
ELECTRICAL CHARACTERISTICS
Circuit of Figure 1, V_BUS = 5V, HZ_MODE=0, OPA_MODE=0, CD=0, T_J = –40°C–125°C and T_J = 25°C for typical values
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
INPUT CURRENTS
I_VBUS
VBUS supply current for control
I_VIN
VIN supply current for control
VBUS > V_MIN, PWM switching
VBUS > V_MIN, PWM NOT switching
0°C < T_J < 85°C, CD = 1 or HZ_MODE = 1
VIN > V_MIN, PWM switching
VIN > V_MIN, PWM NOT switching
0°C < T_J < 85°C, CD = 1 or HZ_MODE = 1, No load on
VREG
10
mA
5
33 80 μA
10
mA
5
150 μA
I_{IN_LEAK}
Leakage current from battery to VBUS pin
and / or VIN
0°C < T_J < 85°C, V_VBAT = 4.2 V, High Impedance mode
5 μA
Battery discharge current in high
impedance mode, (CSIN, VBAT, SW
pins)
0°C < T_J < 85°C, V_VBAT = 4.2 V, High Impedance mode,
SCL,SDA,OTG=0V or 1.8V
23 μA
VOLTAGE REGULATION
V_OREG
Output charge voltage
Voltage regulation accuracy
Operating in voltage regulation, programmable
T_A = 25°C
Over recommended operating temperature
3.5
–0.5%
–0.75%
4.44
V
0.5%
0.75
%
4.1 V – 4.35 V range, over recommended operating
temperature
–0.6%
0.4%
CURRENT REGULATION -FAST CHARGE
VIN, V_LOWV ≤ V_VBAT < V_OREG, VIN > VSLP,
RSNS = 68 mΩ, LOW_CHG=0, Programmable
550
1550
I_OCHARGE
Output charge current
VBUS, V_LOWV ≤ V_VBAT < V_OREG, VBUS > VSLP,
RSNS = 68 mΩ LOW_CHG = 0, Programmable
550
1250 mA
Regulation accuracy for charge current
across RSNS, V_IREG = I_OCHARGE × R_SNS
WEAK BATTERY DETECTION
V_LOWV ≤ V_VBAT < V_OREG, VBUS > VSLP,
RSNS=68 mΩ LOW_CHG=1
37.4 mV ≤ V_IREG
325 350
-3%
3%
V_LOWV
Weak battery voltage threshold
Weak battery voltage accuracy
Programmable
3.4
–5%
3.7
V
5%
4
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