BQ24180_1 Datasheet, PDF (5/41 Pages) Texas Instruments – Fully Integrated Switch-Mode One-Cell Li-Ion Charger with Full USB Compliance and Accessory Power Connection

bq24180
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SLUSA02 A – FEBRUARY 2010 – REVISED FEBRUARY 2010
ELECTRICAL CHARACTERISTICS (continued)
Circuit of Figure 2, V_VBUS = 5V, HZ_MODE=0, CD=0, 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
Internal bottom N-channel MOSFET
on-resistance
Measured from SW to PGND
125
210 mΩ
f_OSC
Oscillator frequency
Frequency accuracy
–10%
3.0
MHz
10%
D_MAX
D_MIN
Maximum duty cycle
Minimum duty cycle
Synchronous mode to non-synchronous
mode transition current threshold⁽¹⁾
Low-side MOSFET cycle-by-cycle current sensing
99.5%
0
100
mA
V_DRV
I_DRV
Internal bias voltage regulator
DRV Output Current
V_{DO_DRV}
DRV Dropout Voltage (V_VBUS – V_DRV)
PROTECTION
I_DRV = 10 mA
External load on DRV
I_VBUS = 1A, V_VBUS = 5 V, I_DRV = 10 mA
V_UVLO < V_VBUS<V_SLP
5
5.2 5.45 V
10
mA
340
mV
750
V_OVP
V_{IN_HIGH}
t_OVP-dgl
I_LIMIT
V_PRECHG
I_PRECHG
T_SHTDWN
Input OVP threshold voltage
V_OVP hysteresis
Input High threshold
VIN_HIGH_USB hysteresis
OVP deglitch time
Cycle-by-cycle current limit for charge
Precharge to fast charge threshold
VPRECHG hysteresis
Precharge charge charging current
Thermal trip
Thermal hysteresis
Threshold over V_VBUS to turn off converter during charge
V_VBUS falling from above V_OVP
V_VBUS Rising, Threshold where I_BAT falls to 50 mA
V_VBUS falling from above V_{IN_HIGH}
V_VBUS rising or falling
Charge mode operation
V_CSOUT rising
V_CSOUT falling from above V_PRECHG
V_CSOUT ≤ V_SHORT and V_{IN_HIGH} < V_VBUS < V_OVP
16 16.5
17 V
185
mV
9.5
9.8 10.1 V
150
mV
32
ms
1.8
2.4
3.0 A
1.9
2.0
2.1 V
100
mV
33.5 50.0 66.5 mA
165
°C
10
°C
T_CF
t_WATCHDOG
Thermal regulation threshold
Timeout for the watchdog timer
Safety timer accuracy
Charge current begins to taper down
Watchdog timer
12
–20%
120
°C
s
20%
V_HOT
TS Hot Threshold
TS Hot Threshold Hysteresis
Corresponds to 55°C, V_TS Falling
VTS Rising
0.153 0.160 0.169 V
12.5
mV
V_WARM
V_COLD
I_TS
TS Warm Threshold
TS Warm Threshold Hysteresis
TS Cold Threshold
TS Cold Threshold Hysteresis
TS Bias Current
TS Open Resistance
Corresponds to 45°C V_TS Falling
V_TS Rising
Corresponds to 5°C, V_TS Rising
V_TS Falling
Resistance on TS that translates to open circuit on TS
0.210 0.225 0.240 V
12.5
mV
1.06 1.10 1.14 V
75
mV
95
100
105 µA
200
kΩ
(1) Bottom N-channel MOSFET always turns on for ~60 ns and then turns off if current is too low.
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