ZHCSJN4C February 2018 – February 2020 TPS2HB16-Q1
PRODUCTION DATA.
- 1 特性
- 2 應用
- 3 說明
- 4 修訂歷史記錄
- 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
- 9.3.1 Protection Mechanisms
- 9.3.2 Fault Event – Timing Diagrams - Version F
- 9.3.3 Diagnostic Mechanisms
- 9.4 Device Functional Modes
- 10Application and Implementation
- 11Power Supply Recommendations
- 12Layout
- 13器件和文檔支持
- 14機械、封裝和可訂購信息
9.3.1.6 Fault Event – Timing Diagrams (Version A/B)
NOTE
All timing diagrams assume that the SELx pins are set to select the relevant channel.
The LATCH, DIA_EN, and ENx pins are controlled by the user. The timing diagrams represent a possible use-case.
Figure 38 shows the immediate current limit switch off and the retry behavior of versions A and B of the device. As shown, the switch will remain latched off until the LATCH pin is low.
Figure 38. Current Limit – Version A and B - Latched Behavior Figure 39 shows the immediate current limit switch off behavior of versions A and B. In this example, LATCH is tied to GND; hence, the switch will retry after the fault is cleared and tRETRY has expired.
Figure 39. Current Limit – Version A and B - LATCH = 0 Figure 40 illustrates auto-retry behavior and provides a zoomed-in view of the fault indication during retry. When the switch retries after a shutdown event, the SNS fault indication will remain at the fault state until VOUT has risen to VBB – 1.8 V. Once VOUT has risen, the SNS fault indication is reset and current sensing is available. If there is a short-to-ground and VOUT cannot rise, the SNS fault indication will remain indefinitely.
NOTE
Figure 40 assumes that tRETRY has expired by the time that TJ reaches the hysteresis threshold.
| LATCH = 0 V and DIA_EN = 5 V |
Figure 40. Fault Indication During Retry