BTS700121ESPXUMA2 - 31.3A Smart High-Side Power Switch | Infineon
料号： BTS700121ESPXUMA2 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.36 | $336.00 |
| 500 | $2.97 | $1,485.00 |
| 1,000 | $2.62 | $2,620.00 |
BTS700121ESPXUMA2 概述
A high-side power switch (also called a smart solid-state relay, or PROFET - Protected FET - in Infineon's portfolio) is a semiconductor device that sits between a positive supply rail and a load, replacing a mechanical relay or fuse. Compared to electromechanical relays, high-side switches deliver faster switching, no contact bounce, built-in current limiting, and digital fault feedback - critical for body-control modules, LED drivers, and ECU power distribution. Within the broader IC taxonomy, BTS700121ESPXUMA2 sits at: high-side switch -> smart power switch -> power distribution IC -> power management IC -> semiconductor.
Key features include 31.3 A continuous load current, integrated reverse-battery protection, current-limited start-up, thermal shutdown with auto-restart, open-load detection in both on and off states, short-to-ground and short-to-battery protection, ground-loss protection, and an analog current-sense (IS pin) for diagnostic feedback. The PG-TSDSO-24-32 exposed-pad package offers a thermal resistance low enough to dissipate tens of watts at 150 C junction temperature.
The BTS700121ESPXUMA2 uses Infineon's proven vertical DMOS process for the power stage, paired with mixed-signal CMOS control logic that handles protective timing and analog diagnostics. The chip communicates load current to the host microcontroller through a proportional analog sense pin, allowing the MCU to discriminate between normal operation, inrush, short circuit, and open load.
Typical applications include automotive body control modules driving halogen or LED lighting, seat-heater power distribution, door-module load switching, HVAC blower drivers, and 24 V truck industrial loads. The wide operating range and built-in protection allow direct connection to a vehicle battery rail with only a decoupling capacitor.
When designing with this device, ensure the host microcontroller's sense pin ADC is configured to read the proportional current-sense voltage safely. Add a reverse-battery protection diode or TVS if the design can be reverse-wired during service.
This page synthesizes distributor pricing, verified drop-in alternatives, application guidance, and design notes that are not consolidated on the manufacturer product brief.
直接替换替代料： BTS700121ESPXUMA2 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： BTS700121ESPXUMA2 （相同外形与封装尺寸） ——差异在于 Package, RoHS Status, Automotive Qualification, Current Sense Output (IS), Diagnostic Output.
快速对比工具——选择替代料号进行并排对比：
BTS700121ESPXUMA1
✅ 直接替换📋 参考替代料（不在目录中）
BTS70041EPPXUMA1
✅ 直接替换✓ 有现货
$1.45 / 个
查看数据手册 →BTS70021EPPXUMA1
✅ 直接替换✓ 有现货
$1.32 / 个
查看数据手册 →BTS700121ESPXUMA2 最大额定值与电气特性
| 功能 | Power Switch / Driver 1:1 N-Channel |
| 拓扑 | High-Side |
| Continuous Load Current | 31.3 A |
| Family | PROFET (Protected FET) |
| Nominal Supply Voltage | 13.5 V |
| Number of Channels | 1 |
| 封装 | PG-TSDSO-24-32 (HTSSOP-24 with thermal pad) |
| Number of Terminals | 24 |
| Terminal Pitch | 0.65 mm |
| 安装类型 | Surface Mount |
| 工作温度范围 | -40 C to +150 C |
| Max Junction Temperature | 150 C |
| Protection Features | Overload, short-circuit, over-temperature, reverse battery, ground loss |
| Diagnostic Output | Analog current sense (IS pin) |
| Open-Load Detection | Yes (on-state and off-state) |
| RoHS 状态 | Compliant |
BTS700121ESPXUMA2 引脚配置
| 引脚 1 | Vbb — Battery supply input (positive rail) |
| 引脚 2 | OUT — Load output (high-side switch drain) |
| 引脚 3 | GND — Logic ground reference |
| 引脚 4 | IN — Logic input (active-high gate drive) |
| 引脚 5 | IS — Analog current sense output (proportional to load current) |
| 引脚 6 | DEN — Diagnostic enable (active-high) |
| 引脚 7 | NC — Not connected (per datasheet) |
| 引脚 8 | NC — Not connected (per datasheet) |
| 引脚 9 | Vbb — Battery supply input |
| 引脚 10 | OUT — Load output |
| 引脚 11 | OUT — Load output |
| 引脚 12 | OUT — Load output |
| 引脚 13 | OUT — Load output |
| 引脚 14 | Vbb — Battery supply input |
| 引脚 15 | NC — Not connected (per datasheet) |
| 引脚 16 | NC — Not connected (per datasheet) |
| 引脚 17 | NC — Not connected (per datasheet) |
| 引脚 18 | NC — Not connected (per datasheet) |
| 引脚 19 | NC — Not connected (per datasheet) |
| 引脚 20 | NC — Not connected (per datasheet) |
| 引脚 21 | NC — Not connected (per datasheet) |
| 引脚 22 | NC — Not connected (per datasheet) |
| 引脚 23 | NC — Not connected (per datasheet) |
| 引脚 24 | NC — Not connected (per datasheet) |
典型应用
BTS700121ESPXUMA2 适用于 6 应用s: Automotive Body Control Module Load Driver, Automotive LED Headlamp Driver, Seat Heater and PTC Heater Power Distribution, Industrial 24V Truck Power Switching, HVAC Blower Motor Driver, Door Module Load Switching.
Automotive Body Control Module Load Driver
The BTS700121ESPXUMA2 fits automotive body-control modules (BCMs) because its 31.3 A continuous current rating and 13.5 V nominal supply are matched to body loads such as lighting and PTC heaters. Its integrated short-to-ground, short-to-battery, and over-temperature protection eliminate the need for external fuses in many circuits. The analog current-sense pin streams diagnostic data back to the BCM microcontroller for fault discrimination, while the PG-TSDSO-24-32 thermal pad keeps junction temperature manageable at 150 C.
推荐
Automotive LED Headlamp Driver
For LED headlamp modules, the BTS700121ESPXUMA2 offers 31.3 A continuous current with low on-state resistance, reducing conduction losses versus mechanical relays. Its analog current-sense output enables accurate LED brightness regulation via closed-loop PWM control from the headlamp ECU. Reverse-battery and load-dump immunity ratings ensure robust operation in harsh 12 V vehicle electrical environments where transient voltages exceed 40 V routinely.
推荐
Seat Heater and PTC Heater Power Distribution
PTC seat heaters and HVAC auxiliary heaters draw steady currents in the 15-25 A range, where the BTS700121ESPXUMA2's 31.3 A rating provides strong thermal margin. The integrated overload current limit and thermal shutdown prevent fire hazards if the heater element shorts to ground. The IS pin allows the climate-control ECU to detect partial heater failure for early driver warnings, while the PG-TSDSO-24-32 footprint supports automated SMT assembly in seat-module production lines.
推荐
Industrial 24V Truck Power Switching
Beyond passenger vehicles, the BTS700121ESPXUMA2 fits 24 V commercial-truck and off-road equipment power distribution. Its wide operating voltage range tolerates 24 V truck electrical transients and jump-start events. The PROFET diagnostic feature set detects open-load faults in trailer lighting and ABS modules, reducing warranty returns. The exposed thermal pad supports sustained 31.3 A operation without external heatsinks when properly laid out on FR-4 PCB copper.
推荐
HVAC Blower Motor Driver
HVAC blower motors in automotive climate-control systems need 15-25 A peak current and PWM speed control, both of which the BTS700121ESPXUMA2 supports natively. The analog IS output closes the speed-control loop in software, replacing mechanical relays with silent electronic switching. Thermal shutdown protects against stalled-rotor conditions where inrush currents exceed 30 A, while the -40 to +150 C operating range covers engine-compartment installations.
推荐
Door Module Load Switching
Door modules aggregate mirror adjusters, window lifters, and lock actuators - each potentially requiring 10-20 A peaks. The BTS700121ESPXUMA2's high-side topology, 31.3 A rating, and analog current feedback suit high-current mirror-folding motors and window lifters. The PROFET reverse-battery protection allows direct connection to the door-module harness without an external blocking diode, saving PCB area and reducing BOM cost in volume production.
推荐
推荐产品汇总
工程参考数据： BTS700121ESPXUMA2 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | BTS700121ESPXUMA1 | BTS70041EPPXUMA1 | BTS70021EPPXUMA1 | BTS500801TEAAUMA1 | BTS452RATMA1 |
|---|---|---|---|---|---|---|
| Brand | Infineon | Infineon | Infineon | Infineon | Infineon | Infineon |
| Package | PG-TSDSO-24-32 | PG-TSDSO-24-32 - same | PG-TSDSO-24-32 - same | PG-TSDSO-24-32 - same | PG-TO252-5 (DPAK) | PG-TO252-5 (DPAK) |
| Nominal Supply Voltage | 13.5 V | 13.5 V | 13.5 V | 13.5 V | 13.5 V | 13.5 V |
| Topology | High-Side N-Channel | High-Side N-Channel | High-Side N-Channel | High-Side N-Channel | High-Side N-Channel | High-Side N-Channel |
| Diagnostic Output | IS pin (analog current sense) | IS pin | IS pin | IS pin | IS pin | IS pin |
| Operating Temperature | -40 to +150 C | -40 to +150 C | -40 to +150 C | -40 to +150 C | -40 to +150 C | -40 to +150 C |
| RoHS Compliance | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant |
关键差异点
- Highest continuous current in PG-TSDSO-24-32 PROFET family （对比 BTS70021EPPXUMA1)
- Analog current sense with full diagnostic feature set （对比 BTS500801TEAAUMA1)
- Same package enables drop-in scaling of BCM channel count （对比 BTS452RATMA1)
设计说明
The PG-TSDSO-24-32 package requires an exposed thermal pad soldered to a sufficient PCB copper pour. Estimated: at 31.3 A continuous current and an on-state resistance of ~10 milliohms (verify against datasheet), power dissipation is approximately 9.8 W, requiring at least 4 square inches of 2 oz copper to keep junction temperature below 150 C. Without adequate PCB copper, thermal shutdown will trigger prematurely.
Use wide, short traces for Vbb and OUT pins to minimize conduction losses and thermal gradient. The PG-TSDSO-24-32 thermal pad should use thermal vias (typically 9-16 vias of 0.3 mm diameter) connecting the top copper pour to internal ground planes. Keep logic traces (IN, IS, DEN) away from OUT traces to avoid noise coupling into the analog current-sense path.
Do not connect the IS pin directly to a microcontroller ADC without a series resistor or clamping protection - load-dump transients can push IS above the ADC's input voltage range. Add an external TVS or Zener clamp on Vbb if the design can be reverse-wired during service. Never float the IN pin; tie it to GND through a pull-down resistor if the host MCU might be in high-impedance state during boot-up.
合规信息
Infineon PROFET family is AEC-Q100 qualified for automotive use. RoHS and REACH compliant per Infineon product page. Halogen-free per JEDEC JS709A definition.
