参数资料
| 型号： | SC824ULTRT |
| 厂商： | Semtech |
| 文件页数： | 10/29页 |
| 文件大小： | 0K |
| 描述： | IC BATTERY MANAGEMENT |
| 标准包装： | 1 |
| 系列： | * |
| 其它名称： | SC824ULDKR |
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SC824
Pin Descriptions
Pin #
1
2
3
4
5
6
7
8
9
10
T
Pin Name
VIN
VSYS
MODE
RTIME
GND
STAT1
STAT0
IPRGM
BAT
EN_NTC
Thermal Pad
Pin Function
Supply pin — Connect to charging adapter (wall adapter or USB). This pin is protected against damage due to
high voltage up to 30V.
System reference voltage supply — 4.6V reference used internally and externally by the NTC circuit. Must have a
1μF capacitor connected between VSYS and GND.
Charging mode selection (tri-level logical) input — Logical high selects USB high power mode, floating selects
USB low power mode, ground selects adapter mode.
Timer setting pin — Connect a resistor between this pin and ground to set the time-out value of the CC mode
timer. Connect to ground to disable the timer. Tie to VSYS to select the 3 hour CC timer using the internal oscilla-
tor.
Ground
Status open drain output pin that is active low when charging is in progress, with or without a charging fault.
When charging is complete, pin is released. See STATx Pin Truth Table.
Status open drain output pin that is pulled low when a valid charging adapter is connected and the voltage is
greater than the UVLO level and less than the OVP level, and no charging fault is detected. Pin is released when
the input is disconnected from a power supply, or to indicate a charging fault. See STATx Pin Truth Table.
Charging current programming pin — Connect a resistor from this pin to ground to program charge current.
Pre-charge current (also USB low power mode fast-charge current) is 20% of IPRGM-programmed fast-charge
current in all modes. The charging termination current threshold for all modes is 10% of the IPRGM programmed
fast-charge current. If this pin is grounded, pin-short detection holds the SC824 in logical reset, with charging
disabled.
Charger output — Connect to battery positive terminal.
Battery NTC thermistor connection pin — EN_NTC pin input voltage ranges are ratiometric with respect to the
VSYS pin output voltage. The safe-to-charge battery temperature range is programmed with a resistor from the
EN_NTC pin to the VSYS pin, and a battery pack NTC thermistor to ground; charging is suspended when the
EN_NTC pin voltage is less than 30%, or greater than 75%, of V VSYS . When pulled down below 10% of V VSYS , charging
is unconditionally disabled. When the level exceeds 95% of V VSYS , the battery is assumed to be disconnected and
the device operates in No-Battery mode.
Pad is for heatsinking purposes — The thermal pad is not connected internally. Connect exposed pad to ground
plane using multiple vias.
10
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