ZHCSIV1F September 2018 – February 2023 TPS1663
PRODUCTION DATA
- 1 特性
- 2 應用
- 3 說明
- 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
- 9.3.1 Hot Plug-In and In-Rush Current Control
- 9.3.2 Undervoltage Lockout (UVLO)
- 9.3.3 Overvoltage Protection (OVP)
- 9.3.4 Overload and Short Circuit Protection
- 9.3.5 Output Power Limiting, PLIM (TPS16632 Only)
- 9.3.6 Current Monitoring Output (IMON)
- 9.3.7 FAULT Response (FLT)
- 9.3.8 Power Good Output (PGOOD)
- 9.3.9 IN, P_IN, OUT and GND Pins
- 9.3.10 Thermal Shutdown
- 9.3.11 Low Current Shutdown Control (SHDN)
- 9.4 Device Functional Modes
- 10Application and Implementation
- 11Device and Documentation Support
- 12Mechanical, Packaging, and Orderable Information
封裝選項
請參考 PDF 數據表獲取器件具體的封裝圖。
機械數據 (封裝 | 引腳)
- RGE|24
- PWP|20
散熱焊盤機械數據 (封裝 | 引腳)
訂購信息
9.3.4.1 Overload Protection
The TPS1663x devices feature accurate overload current limiting and fast short circuit protection feature. If the load current exceeds the programmed current limit IOL, the device regulates the current through it at IOL eventually reducing the output voltage. The power dissipation across the device during this operation is (VIN – VOUT) × IOL and this can heat up the device and eventually enter into thermal shutdown. The maximum duration for the overcurrent through the FET is tCL_PLIM(dly), 162 msec (typical). If the thermal shutdown occurs before this time the internal FET turns OFF and the device operates either in auto-retry or latch off mode based on MODE pin configuration in Table 9-1. Set the current limit using Equation 4.
where
- I(OL) is the overload current limit in Ampere
- R(ILIM) is the current limit resistor in kΩ
During the overload current limiting if the overload condition exists for more than tCL_PLIM_FLT(dly), 1.3 msec (typical), the FLT asserts to warn of impending turnoff of the internal FETs due to the subsequent thermal shutdown event or due to tCL_PLIM(dly) timer expiry. The FLT signal remains asserted until the fault condition is removed and the device resumes normal operation. Figure 9-6 and Figure 9-7 illustrate overload current limiting performance.
| VIN = 50 V | MODE = GND | RILIM = 18 kΩ |
| VIN = 50 V | MODE = GND | RILIM = 18 kΩ |
The TPS1663x devices features ILIM pin short and open fault detection and protection. The internal FET is turned OFF when ILIM pin is detected short or open to GND and it remains OFF till the ILIM pin fault is removed.