ZHCSO95B june 2022 – may 2023 TPS1641
PRODUCTION DATA
- 1
- 1 特性
- 2 應用
- 3 說明
- 4 Revision History
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
- 7 Specifications
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3
Feature Description
- 8.3.1 Enable and Shutdown Input (EN/SHDN)
- 8.3.2 Overvoltage Protection (OVP)
- 8.3.3 Output Slew Rate and Inrush Current Control (dVdt)
- 8.3.4 Active Current Limiting (ILIM) With the TPS16412, TPS16413, TPS16416, and TPS16417
- 8.3.5 Active Power Limiting (PLIM) With the TPS16410, TPS16411, TPS16414, and TPS16415
- 8.3.6 Overcurrent Protection (IOCP) and Blanking Time (IDLY or PDLY) for Transient Loads
- 8.3.7 Fast-Trip and Short-Circuit Protection
- 8.3.8 Analog Load Current Monitor (IMON) on the IOCP Pin
- 8.3.9 IN to OUT Short Detection (TPS16410, TPS16411, TPS16412, and TPS16413)
- 8.3.10 Thermal Shutdown and Overtemperature Protection
- 8.3.11 Fault Response and Indication (FLT)
- 8.4 Device Functional Modes
- 9 Application and Implementation
- 10Device and Documentation Support
- 11Mechanical, Packaging, and Orderable Information
8.3.11 Fault Response and Indication (FLT)
FLT is an open-drain output to indicate the overvoltage, IN to OUT short, overtemperature, current limit, and power limit events. Table 8-4 summarizes the state of FLT pin under different events. To prevent excessive dissipation in device during adjacent pin short test (FLT to EN/SHDN), pull up the FLT pin with a resistor (RFLT) such that sink current into FLT pin is less than 3 mA. Figure 8-16 shows the connection diagram for FLT pin with a pullup resistor.
Figure 8-16 FLT
Output in the TPS1641xTable 8-4 FLT Pin
Indication for Different Events
| Event, Condition | FLT Pin | Retry Delay With IDLY/PDLY = Open or GND for TPS16410, TPS16412, TPS16414, and TPS16416 | Retry Delay With Capacitor on IDLY/PDLY pin for TPS16410, TPS16412, TPS16414, and TPS16416 |
|---|---|---|---|
| Overvoltage protection (VOVP > VOVPR)(1) | Low | NA | NA |
| IN to short detection (TPS16410, TPS16411, TPS16412, and TPS16413) | Low | No retry, latch off | No retry, latch off |
| Thermal shutdown (TJ > TTSD) | Low | 620 ms | 8 × tPDLY/IDLY |
| After current or power limiting timeout | Low | 620 ms | 8 × tPDLY/IDLY |
(1) For overvoltage protection,
device turns on the FET as VOVP falls below VOVPF