ZHCSO86B december 2022 – july 2023 LM74900-Q1 , LM74910-Q1
PRODUCTION DATA
- 1
- 1 特性
- 2 应用
- 3 说明
- 4 Revision History
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
- 7 Specifications
- 8 Parameter Measurement Information
-
9 Detailed Description
- 9.1 Overview
- 9.2 Functional Block Diagram
- 9.3 Feature Description
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10Applications and Implementation
- 10.1 Application Information
- 10.2
Typical 12-V Reverse Battery Protection Application
- 10.2.1 Design Requirements for 12-V Battery Protection
- 10.2.2 Automotive Reverse Battery Protection
- 10.2.3
Detailed Design Procedure
- 10.2.3.1 Design Considerations
- 10.2.3.2 Charge Pump Capacitance VCAP
- 10.2.3.3 Input and Output Capacitance
- 10.2.3.4 Hold-Up Capacitance
- 10.2.3.5 Selection of Current Sense Resistor, RSNS
- 10.2.3.6 Selection of Scaling Resistor (RSET) and Short-Circuit Protection Setting Resistor (RSCP)
- 10.2.3.7 Overcurrent Limit (ILIM), Circuit Breaker Timer (TMR), and Current Monitoring Output (IMON) Selection
- 10.2.3.8 Overvoltage Protection and Battery Monitor
- 10.2.4 MOSFET Selection: Blocking MOSFET Q1
- 10.2.5 MOSFET Selection: Hot-Swap MOSFET Q2
- 10.2.6 TVS Selection
- 10.2.7 Application Curves
- 10.3 Addressing Automotive Input Reverse Battery Protection Topologies With LM749x0-Q1
- 10.4 Power Supply Recommendations
- 10.5 Layout
- 11Device and Documentation Support
- 12Mechanical, Packaging, and Orderable Information
7.7 Typical Characteristics
Figure 7-1 Operating Quiescent Current vs Supply Voltage
Figure 7-3 SLEEP Mode Current vs Supply Voltage
A.
Figure 7-5 Charge Pump Current vs Supply Voltage at CAP – VS ≥ 6 V (LM74910-Q1)
A.
Figure 7-7 Charge Pump V-I Characteristics at VS ≥ 12 V (LM74910-Q1)
A.
Figure 7-9 HGATE Drive Voltage vs Supply Voltage
A.
Figure 7-11 UVLO Thresholds vs Temperature
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Figure 7-13 Charge Pump UVLO Threshold vs Temperature
Figure 7-15 ISCP Bias Current vs Temperature
Figure 7-17 VS POR Threshold vs Temperature
Figure 7-19 DGATE Turn On Delay During Forward Conduction
Figure 7-21 HGATE Turn OFF Delay During SCP
Figure 7-2 Shutdown Current vs Supply Voltage
A.
Figure 7-4 Charge Pump Current vs Supply Voltage at CAP – VS ≥ 6 V (LM74900-Q1)
A.
Figure 7-6 Charge Pump V-I Characteristics at VS ≥ 12 V (LM74900-Q1)
A.
Figure 7-8 DGATE Drive Voltage vs Supply Voltage
A.
Figure 7-10 ANODE Leakage Current vs Reverse ANODE Voltage
A.
Figure 7-12 OVP Thresholds vs Temperature
Figure 7-14 ISCP to CS– Threshold vs Temperature
A.
Figure 7-16 VA POR Threshold vs Temperature
Figure 7-18 DGATE Turn OFF Delay
Figure 7-20 HGATE Turn OFF Delay During OV
A.
Figure 7-22 Current Monitor Output vs Sense Voltage (RIMON = 5kΩ, RSET = 50Ω)