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Hello, Please ask a question about L9961-TR Datasheet
# Example questions:
➢ What is the significance of these differing current limits, and how do they affect the types of loads the regulator can reliably power in each state?
➢ What are the typical current consumption values for the l9961 in shipment - deep sleep, standby, and normal states, and how do these values influence system power efficiency?
➢ Describe the function of the nship and wakeup pins, including their respective voltage thresholds and filter times, and explain how they contribute to the device's power-saving capabilities?
| Part No. | L9961-TR |
| Manufacturer | STMICROELECTRONICS |
| Size | 1Mb |
| Pages | 65 pages |
| Description | Battery management system solution |
I. Wakeup Sources (NSHIP & WAKEUP)
️· WAKEUP Threshold (VWAKEUP_TH): 0.8V – 1.8V
️· NSHIP Threshold (VNSHIP_TH): 1V – 3V
️· WAKEUP Filter Time (TWAKEUP_FIL): Up to 40µs
️· NSHIP Filter Time (TNSHIP_FIL): Up to 20µs
️· WAKEUP Pulldown Resistor (RWAKEUP_PD): 60kΩ – 150kΩ
II. Power Consumption (Current – IVB)
️· SHIPMENT - DEEP SLEEP (IVB_SHIP): Up to 2 µA
️· STANDBY (IVB_STBY): Up to 5 µA
️· NORMAL (IVB_NORM): 155µA - 190µA (typical, no load, balancing off). Can increase significantly with ADC activity and FETs on (see detailed breakdown in document - additional current consumption from 90-420µA dependent on which features are activated).
III. Regulator (VREG) - Key Parameters
️· NORMAL State Voltage (VVREG_NORM): 3.23V – 3.37V
️· NORMAL State Current Limit (IVREG_CURR_LIM): 40mA
️· STANDBY State Voltage: not directly given, but implies reduced performance.
️· STANDBY State Current Limit (IVREG_CURR_LIM_STBY): 15mA - 85mA
️· VREG Current Capability (NORMAL): 0.01mA - 35mA
IV. Timings (Important Transitions)
️· GO2STBY (Command to STANDBY): 2ms - 4ms
️· GO2SHIP (Command to SHIPMENT - DEEP SLEEP): 0ms - 10ms
️· TSTBY2NORMAL (STANDBY to NORMAL): up to 1ms
️· TSHIP2NORMAL (SHIPMENT-DEEP SLEEP to NORMAL): up to 5ms
️· TI2C_READY (Wakeup/NSHIP to I2C ready): up to 15ms
️· TCP_STARTUP (Charge pump startup): up to 8ms
️· IWAKEMAX: up to 15mA during STANDBY->NORMAL transition.
️· TWAKEMAX: up to 1ms to send wakeup command.
V. Additional Notes
️· The document emphasizes that power consumption in NORMAL state *increases* depending on activity (ADC conversion, FETs on).
️· The VREG has different performance (voltage regulation, current limit) in STANDBY vs. NORMAL states.
️· Timings are specified as *maximum* values.
This is a summary. The original document provides more detailed specifications and operating conditions.
I. Wakeup Sources (NSHIP & WAKEUP)
️· WAKEUP Threshold (VWAKEUP_TH): 0.8V – 1.8V
️· NSHIP Threshold (VNSHIP_TH): 1V – 3V
️· WAKEUP Filter Time (TWAKEUP_FIL): Up to 40µs
️· NSHIP Filter Time (TNSHIP_FIL): Up to 20µs
️· WAKEUP Pulldown Resistor (RWAKEUP_PD): 60kΩ – 150kΩ
II. Power Consumption (Current – IVB)
️· SHIPMENT - DEEP SLEEP (IVB_SHIP): Up to 2 µA
️· STANDBY (IVB_STBY): Up to 5 µA
️· NORMAL (IVB_NORM): 155µA - 190µA (typical, no load, balancing off). Can increase significantly with ADC activity and FETs on (see detailed breakdown in document - additional current consumption from 90-420µA dependent on which features are activated).
III. Regulator (VREG) - Key Parameters
️· NORMAL State Voltage (VVREG_NORM): 3.23V – 3.37V
️· NORMAL State Current Limit (IVREG_CURR_LIM): 40mA
️· STANDBY State Voltage: not directly given, but implies reduced performance.
️· STANDBY State Current Limit (IVREG_CURR_LIM_STBY): 15mA - 85mA
️· VREG Current Capability (NORMAL): 0.01mA - 35mA
IV. Timings (Important Transitions)
️· GO2STBY (Command to STANDBY): 2ms - 4ms
️· GO2SHIP (Command to SHIPMENT - DEEP SLEEP): 0ms - 10ms
️· TSTBY2NORMAL (STANDBY to NORMAL): up to 1ms
️· TSHIP2NORMAL (SHIPMENT-DEEP SLEEP to NORMAL): up to 5ms
️· TI2C_READY (Wakeup/NSHIP to I2C ready): up to 15ms
️· TCP_STARTUP (Charge pump startup): up to 8ms
️· IWAKEMAX: up to 15mA during STANDBY->NORMAL transition.
️· TWAKEMAX: up to 1ms to send wakeup command.
V. Additional Notes
️· The document emphasizes that power consumption in NORMAL state *increases* depending on activity (ADC conversion, FETs on).
️· The VREG has different performance (voltage regulation, current limit) in STANDBY vs. NORMAL states.
️· Timings are specified as *maximum* values.
This is a summary. The original document provides more detailed specifications and operating conditions.
| Part No. | L9961-TR |
| Manufacturer | STMICROELECTRONICS |
| Size | 1Mb |
| Pages | 65 pages |
| Description | Battery management system solution |
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