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Hello, Please ask a question about LTC4155 Datasheet
# Example questions:
➢ What is the typical peak inductor current clamp value for the ltc4155 when operating in 500ma to 3a ivbus modes?
➢ What is the i2c address of the ltc4155?
➢ What is the rising threshold voltage for the usb input undervoltage lockout (vuvlo)?
| Part No. | LTC4155 |
| Manufacturer | LINER |
| Size | 391 Kbytes |
| Pages | 52 pages |
| Description | Dual-Input Power Manager |
I. Overview
️· The LTC4155 is a USB power path management IC. It's designed for applications like battery charging, power path selection, and overvoltage protection. It includes features for USB On-The-Go (OTG) and a battery conditioner.
II. Electrical Characteristics - General
️· V<sub>BUS</sub> Output Voltage: 4.75V to 5.25V (under specific conditions)
️· V<sub>OUT</sub> Input Voltage: 2.9V
️· I<sub>VBUSOTG</sub> Output Current Limit: 1.4A
️· I<sub>VOUTOTGQ</sub> VOUT Quiescent Current: 1.96 mA
️· V<sub>USBGT</sub>/V<sub>WALLGT</sub> Load Voltage: 8.4V/8.9V
️· I<sub>USBSNSQ</sub>/I<sub>WALLSNSQ</sub> Quiescent Current: 27/54 μA, 54 μA/27 μA
️· T<sub>RISE</sub> to Regulation: 1.2ms (for OVGCAP)
III. Electrical Characteristics - Input & Protection
️· USB Input UVLO (Undervoltage Lockout): Rising threshold: 4.05V to 4.45V; Falling: 3.90V to 4.25V; Hysteresis: 100mV.
️· Wall Input UVLO: Similar UVLO thresholds as USB Input.
️· V<sub>USBGT</sub>/V<sub>WALLGT</sub> Overvoltage Protection: Rising threshold: 5.75V/6.0V, 6.3V
️· V<sub>USBGT</sub>/V<sub>WALLGT</sub> Protected Voltage: 0V
️· I<sub>IRQ</sub> Leakage Current: 1 μA
️· V<sub>IRQ</sub> Output Low Voltage: 75mV to 100mV
️· I<sub>D</sub> Pull-Up Current: 35 to 85 μA
️· V<sub>ID_OTG</sub> Threshold Voltage: 0.5V, 0.86V, 0.2V, 0.95V
️· I<sub>BATOVERTEMP</sub> Discharge Current: 125 mA (when enabled via I2C)
️· V<sub>BATOVERTEMP</sub> Voltage Target: 3.85V (when enabled via I2C)
IV. Thermistor Measurement System
️· κ<sub>OFFSET</sub>: 0.113 V/V
️· κ<sub>HIGH</sub>: 0.895 V/V
️· κ<sub>SPAN</sub>: 6.091/6.162/6.191 mV/V/LSB (A/D Span Coefficient)
️· dTOO_COLD: NTCVAL at warning and reset thresholds: 102/98 (count)
️· dTOO_WARM: NTCVAL at warning and reset thresholds: 41/45 (count)
️· dHOT_FAULT: NTCVAL at fault/reset thresholds: 19/23 (count)
️· I<sub>NT</sub>C Leakage Current: -100 to +100 nA
V. Ideal Diode
️· VFWD forward Voltage detection Input Power Available, Battery Charger Off: 15mV
VI. I2C Communication
️· DVCC: 1.7V (maximum)
️· IDVCCQ: 0.25μA
️· VDVCC_UVLO: 1.0V
️· I2C Address: 0001_001[R/W]b
️· VIH, SDA, SCL: 70% DVCC
️· VIL, SDA, SCL: 30% DVCC
️· IIH, SDA, SCL: -1 to +1 μA
Key Notes & Considerations:
️· Conditions: Many of these values are conditional; pay close attention to the conditions specified alongside them.
️· I2C: The I2C interface is critical for configuring and controlling the LTC4155's behavior.
️· Thermistor Accuracy: The thermistor measurement system’s accuracy depends on the accuracy of the thermistor itself and the calibration.
️· Temperature and Voltage Dependency: Some characteristics are temperature-dependent.
I. Overview
️· The LTC4155 is a USB power path management IC. It's designed for applications like battery charging, power path selection, and overvoltage protection. It includes features for USB On-The-Go (OTG) and a battery conditioner.
II. Electrical Characteristics - General
️· V<sub>BUS</sub> Output Voltage: 4.75V to 5.25V (under specific conditions)
️· V<sub>OUT</sub> Input Voltage: 2.9V
️· I<sub>VBUSOTG</sub> Output Current Limit: 1.4A
️· I<sub>VOUTOTGQ</sub> VOUT Quiescent Current: 1.96 mA
️· V<sub>USBGT</sub>/V<sub>WALLGT</sub> Load Voltage: 8.4V/8.9V
️· I<sub>USBSNSQ</sub>/I<sub>WALLSNSQ</sub> Quiescent Current: 27/54 μA, 54 μA/27 μA
️· T<sub>RISE</sub> to Regulation: 1.2ms (for OVGCAP)
III. Electrical Characteristics - Input & Protection
️· USB Input UVLO (Undervoltage Lockout): Rising threshold: 4.05V to 4.45V; Falling: 3.90V to 4.25V; Hysteresis: 100mV.
️· Wall Input UVLO: Similar UVLO thresholds as USB Input.
️· V<sub>USBGT</sub>/V<sub>WALLGT</sub> Overvoltage Protection: Rising threshold: 5.75V/6.0V, 6.3V
️· V<sub>USBGT</sub>/V<sub>WALLGT</sub> Protected Voltage: 0V
️· I<sub>IRQ</sub> Leakage Current: 1 μA
️· V<sub>IRQ</sub> Output Low Voltage: 75mV to 100mV
️· I<sub>D</sub> Pull-Up Current: 35 to 85 μA
️· V<sub>ID_OTG</sub> Threshold Voltage: 0.5V, 0.86V, 0.2V, 0.95V
️· I<sub>BATOVERTEMP</sub> Discharge Current: 125 mA (when enabled via I2C)
️· V<sub>BATOVERTEMP</sub> Voltage Target: 3.85V (when enabled via I2C)
IV. Thermistor Measurement System
️· κ<sub>OFFSET</sub>: 0.113 V/V
️· κ<sub>HIGH</sub>: 0.895 V/V
️· κ<sub>SPAN</sub>: 6.091/6.162/6.191 mV/V/LSB (A/D Span Coefficient)
️· dTOO_COLD: NTCVAL at warning and reset thresholds: 102/98 (count)
️· dTOO_WARM: NTCVAL at warning and reset thresholds: 41/45 (count)
️· dHOT_FAULT: NTCVAL at fault/reset thresholds: 19/23 (count)
️· I<sub>NT</sub>C Leakage Current: -100 to +100 nA
V. Ideal Diode
️· VFWD forward Voltage detection Input Power Available, Battery Charger Off: 15mV
VI. I2C Communication
️· DVCC: 1.7V (maximum)
️· IDVCCQ: 0.25μA
️· VDVCC_UVLO: 1.0V
️· I2C Address: 0001_001[R/W]b
️· VIH, SDA, SCL: 70% DVCC
️· VIL, SDA, SCL: 30% DVCC
️· IIH, SDA, SCL: -1 to +1 μA
Key Notes & Considerations:
️· Conditions: Many of these values are conditional; pay close attention to the conditions specified alongside them.
️· I2C: The I2C interface is critical for configuring and controlling the LTC4155's behavior.
️· Thermistor Accuracy: The thermistor measurement system’s accuracy depends on the accuracy of the thermistor itself and the calibration.
️· Temperature and Voltage Dependency: Some characteristics are temperature-dependent.
| Part No. | LTC4155 |
| Manufacturer | LINER |
| Size | 391 Kbytes |
| Pages | 52 pages |
| Description | Dual-Input Power Manager |
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