The TPS259521DSGR from Texas Instruments is a 2.7-18V 4A 34mOhm eFuse with fast 3.8V overvoltage clamp, auto-retry, and 2x2mm WSON-8 package.<\/p>\n
| Tipo<\/td>\n | 2.7-18V 4A eFuse with Fast Overvoltage Protection<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Input Voltage<\/td>\n | 2.7V to 18V<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| On-Resistance<\/td>\n | 34 mOhm (typical)<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Continuous Current<\/td>\n | 4A (-40 to 125C); 5A (-40 to 105C)<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Current Limit Range<\/td>\n | 0.5A to 4A (adjustable, +\/-7.5%)<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Overvoltage Clamp<\/td>\n | 3.8V (typical, TPS259521 variant)<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| OVP Response Time<\/td>\n | 5 us (typical)<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fault Response<\/td>\n | Auto-retry<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Enable<\/td>\n | Active-high (with adjustable UVLO)<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Output Slew Rate<\/td>\n | Adjustable via dVdt capacitor<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Paquete<\/td>\n | WSON-8 (DSG, 2 x 2 mm)<\/td>\n<\/tr>\n | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Temperatura de funcionamiento<\/td>\n | -40C to +125C<\/td>\n<\/tr>\n<\/table>\nCaracter\u00edsticas<\/h2>\nAplicaciones<\/h2>\nProduct Overview The TPS259521DSGR from Texas Instruments is a 2.7-18V 4A 34mOhm eFuse with fast 3.8V overvoltage clamp, auto-retry, and 2x2mm WSON-8 package. Key Specifications Type 2.7-18V 4A eFuse with Fast Overvoltage Protection Input Voltage 2.7V to 18V On-Resistance 34 mOhm (typical) Continuous Current 4A (-40 to 125C); 5A (-40 to 105C) Current Limit Range […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[19,13],"tags":[],"chip_brand":[138],"class_list":["post-6986","post","type-post","status-publish","format-standard","hentry","category-analog-linear-ics","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"eFuse, 2.7-18V, 4A, 34mOhm, 3.8V OVP, WSON-8","date_code":"","package_case":"WSON-8 (2.00 x 2.00 x 0.75 mm, 0.5mm pitch, exposed pad)","in_stock":6789,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/tps2595.pdf","price":"$0.53 @ 1ku","product_introduction":"The TPS259521DSGR from Texas Instruments is a 2.7V to 18V eFuse (integrated FET hot-swap device) in a tiny 2x2mm WSON-8 package. The DSG suffix denotes the 8-pin WSON package, and R indicates tape and reel. The TPS259521 variant specifically features a 3.8V typical overvoltage clamp with auto-retry fault response and active-high enable. The eFuse integrates a 34mOhm N-channel MOSFET power switch with comprehensive protection circuits in a single device, replacing multiple discrete components (fuse, TVS, hot-swap controller, and MOSFET). The adjustable current limit (0.5A to 4A with +\/-7.5% accuracy) is set by a single external resistor from the ILM pin to ground. The 3.8V overvoltage clamp activates within 5us when the input voltage exceeds the clamp threshold, protecting downstream circuitry from voltage surges without requiring external TVS diodes. The auto-retry fault response automatically attempts to re-energize the output after a fault condition, reducing system downtime. The adjustable output slew rate (via the dVdt capacitor) controls inrush current during hot-plug events. The ILM pin also provides a load current monitor output proportional to the actual load current. The device is UL 2367 recognized and IEC 62368-1 certified for safety-critical applications.","working_principle":"The TPS259521DSGR integrates a power MOSFET with control and protection circuits. The 34mOhm N-channel MOSFET is driven by an internal charge pump that generates the gate voltage above VIN to fully enhance the device. The current limit circuit measures the load current through the MOSFET and compares it with the threshold set by the ILM resistor. When the current exceeds the limit, the gate drive is reduced to maintain constant-current operation. The ILM pin voltage is proportional to the load current, providing a monitor output. The overvoltage clamp uses a fast comparator that monitors the input voltage; when VIN exceeds the 3.8V threshold, the MOSFET is partially turned off to clamp the output voltage, limiting the energy delivered to the load. The 5us response time is achieved by a dedicated clamp circuit that bypasses the normal control loop. The dVdt circuit controls the gate voltage ramp rate during turn-on, setting the output voltage slew rate (dV\/dt) and therefore the inrush current (Iinrush = CLOAD x dV\/dt). The auto-retry circuit automatically re-enables the output after a fault timeout period, cycling the output on and off until the fault clears. The EN\/UVLO pin serves dual duty: the active-high enable turns the device on and off, while a resistor divider from VIN to EN sets the undervoltage lockout threshold.","pin_description":"
|