ZHCSLI9A December 2021 – June 2022 TPS92623-Q1
PRODUCTION DATA
- 1 特性
- 2 應用
- 3 說明
- 4 Revision History
- 5 Pin Configuration and Functions
- 6 Specifications
-
7 Detailed Description
- 7.1 Overview
- 7.2 Functional Block Diagram
- 7.3
Feature Description
- 7.3.1 Power Supply (SUPPLY)
- 7.3.2 Enable and Shutdown
- 7.3.3 Constant-Current Output and Setting (INx)
- 7.3.4 Thermal Sharing Resistor (OUTx and RESx)
- 7.3.5 PWM Control (PWMx)
- 7.3.6 Supply Control
- 7.3.7 Diagnostics
- 7.3.8 FAULT Bus Output with One-Fails-All-Fail
- 7.3.9 FAULT Table
- 7.3.10 LED Fault Summary
- 7.3.11 IO Pins Inner Connection
- 7.4 Device Functional Modes
- 8 Application and Implementation
- 9 Power Supply Recommendations
- 10Layout
- 11Device and Documentation Support
- 12Mechanical, Packaging, and Orderable Information
7.3.7.3 LED Open-Circuit Detection Enable (DIAGEN)
The TPS92623-Q1 device supports the DIAGEN pin with an accurate threshold to disable the LED open-circuit. The DIAGEN pin can be used to enable or disable LED open-circuit detection based on SUPPLY pin voltage sensed by an external resistor divider as illustrated in Figure 7-5. When the voltage applied on DIAGEN pin is higher than the threshold VIH(DIAGEN), the device enables LED open-circuit detection. When V(DIAGEN) is lower than the threshold VIL(DIAGEN), the device disables LED open-circuit detection.
Only LED open-circuit detection can be disabled by pulling down the DIAGEN pin. The LED short-to-GND detection and overtemperature protection cannot be turned off by pulling down the DIAGEN pin. The SUPPLY threshold voltage can be calculated by using Equation 3.
where
- VIL(DIAGEN) = 1.045 V (minimum)