BQ24262_15 Datasheet, PDF (7/56 Pages) Texas Instruments – bq2426x 3-A, 30-V, Host-Controlled Single-Input, Single-Cell Switched-Mode Li-Ion Battery Charger With Power-Path Management and USB-OTG Support

Not Recommended for New Designs : bq24260, bq24261
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bq24260, bq24261, bq24261M, bq24262
SLUSBU4D – DECEMBER 2013 – REVISED APRIL 2015
8.4 Thermal Information
THERMAL METRIC⁽¹⁾
bq2426x
YFF [DSBGA]
RGE [VQFN]
UNIT
36 PINS
24 PINS
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
55.8
32.6
0.5
30.5
10
3.3
°C/W
2.6
0.4
9.9
9.3
N/A
2.6
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.
8.5 Electrical Characteristics
Circuit of Figure 7, V_UVLO < V_IN < V_OVP AND V_IN > V_BAT+ V_SLP, 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
INPUT CURRENTS
V_UVLO < V_IN < V_OVP and V_IN > V_BAT + V_SLP
15
PWM switching
YFF Package: V_UVLO < V_IN < V_OVP and _VIN > V_BAT + V_SLP
I_IN
Supply current for control
PWM NOT switching
RGE Package: V_UVLO < V_IN < V_OVP and _VIN > V_BAT + V_SLP
PWM NOT switching
6.5 mA
6.65
I_{BAT_HIZ}
Battery discharge current in
High Impedance mode, (BAT,
SW, SYS)
0°C < T_J < 85°C, V_IN = 5 V, Hi-Z Mode
0°C < T_J < 85°C, V_BAT = 4.2 V, V_IN = 5 V,
SCL, SDA = 0 V or 1.8 V, Hi-Z Mode
YFF Package: 0°C < T_J < 85°C, V_BAT = 4.2 V, V_IN = 0 V,
SCL, SDA = 0 V or 1.8 V
RGE Package: 0°C < T_J < 85°C, V_BAT = 4.2 V, V_IN = 0 V,
SCL, SDA = 0 V or 1.8 V
250 μA
15
77 μA
80
POWER-PATH MANAGEMENT
V_SYSREG(LO)
System Regulation Voltage
V_BAT < V_MINSYS
V_MINSYS
V_MINSYS
+ 80 mV + 100 mV
V_MINSYS
+ 120
mV
V
V_SYSREG(HI)
bq24260/1/2 - Battery FET turned off, no charging, V_BAT > 3.5 VBATREG VBATREG VBATREG
V
+2.2%
+2.5% +2.77%
System Regulation Voltage
V
bq24261M - Battery FET turned off, no charging, V_BAT > 3.5 V
V_BATREG
+1.4%
V_BATREG V_BATREG
+1.6% +1.77%
V_MINSYS
Minimum System Voltage
Regulation Threshold
V_BAT + V_{DO(SYS_BAT)} < 3.5 V
3.44
3.5
3.55
V
t_{DGL(MINSYS_CMP)}
Deglitch time, VMINSYS
comparator rising
8
ms
V_BSUP1
Enter supplement mode
threshold
V_BAT > V_BUVLO
V_BAT – 20
mV
V
V_BSUP2
Exit supplement mode
threshold
V_BAT > V_BUVLO
V_BAT – 5
mV
V
I_LIM(DISCH)
t_DGL(SC1)
Current Limit, Discharge or
Supplement Mode⁽¹⁾
Deglitch Time, SYS Short
Circuit during Discharge or
Supplement Mode
bq24260/1/2 - V_LIM(BGATE) = V_BAT – V_SYS
bq24261M - V_LIM(BGATE) = V_BAT – V_SYS
Measured from I_BAT = 7A to FET off
4
6
A
6
9
250
μs
t_REC(SC1)
Recovery time, SYS Short
Circuit during Discharge or
Supplement Mode
2
s
Battery Range for BGATE
Operation
2.5
4.5
V
(1) Continuous and periodic pulse currents from BAT to SYS are limited by Output Current specifications in Absolute Maximum Ratings
table.
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