STCC2540 Datasheet, PDF (9/32 Pages) STMicroelectronics – USB charging controller with integrated power switch

STCC2540
Electrical characteristics
Table 4. Electrical characteristics V_IN = 4.5 to 5.5 V, -40 °C < T_J < 125 °C
(unless otherwise specified) (continued)
Symbol
Parameter
Conditions
Min. Typ. Max. Unit
Charger emulator - divider mode
V_DM
DM_IN output voltage
Device set to DCP auto-detect ^{1.96 2 2.04}
mode or divider mode,
V
V_DP
DP_IN output voltage
V_IN = 5.0 V
2.65 2.7 2.75
R_DM
DM_IN output resistance
Device set to DCP auto-detect
27
mode or divider mode
kΩ
R_DP
DP_IN output resistance
27
Charger emulator - BC1.2 CDP mode
V_{DM_SRC}
V_{DAT_REF}
V_{DAT_REF_HYST}
V_{LGC_SRC}
V_{LGC_SRC_HYST}
I_{DP_SINK}
Voltage source on DM_IN for V_{DP_IN} = 0.6 V, device in CDP
CDP detection
BC1.2 mode
0.5 0.6
0.7
DP_IN rising voltage
threshold to turn on
V_{DM_SRC}
V
0.25 0.32 0.4
V_{DAT_REF} hysteresis
DP_IN rising voltage
threshold to turn off
V_{DM_SRC}
I_{DM_IN} = -250 µA, device in
CDP BC1.2 mode
30
mV
0.8
1
V
V_{LGC_SRC} hysteresis
30
mV
DP_IN sink current
0.4 < V_{DP_IN} < 0.8 V, device in
CDP BC1.2 mode
50
75 150
µA
Charger emulator - timings
t_{CHG_DGL_ON}
t_{CHG_DGL_OFF}
t_{VDM_SRC_ON}
t_{VDM_SRC_OFF}
t_{VBUS_REAPP}
Charging indication ON
deglitch delay
Charging indication OFF
deglitch delay
From I_OUT > I_{OUT _TH} to
CHARGING asserted
From I_OUT < I_{OUT_TH} to
CHARGING deasserted
0.5
s
5
DM_IN voltage source turn-
on time
From V_{DP_IN} 0 V -> 0.6 V to
V_{DM_IN} = V_{DM_SRC}, CTLx
configured for CDP BC1.2
8
DM_IN voltage source turn-
off time
From V_{DP_IN} 0.6 V -> 0 V to
V_{DM_IN} = 0 V, CTLx configured
for CDP BC1.2
1.3
ms
From V_OUT falls to 0.7 V during
OUT discharge pulse width discharge to V_OUT returning to 300 350 400
90%.
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