BTS443PAUMA1 - Smart High-Side Power Switch, 21A, 36V | Infineon
部品番号: BTS443PAUMA1 ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $4.1 | $4.10 |
| 10 | $3.65 | $36.50 |
| 100 | $3.05 | $305.00 |
| 500 | $2.62 | $1,310.00 |
| 1,000 | $2.3 | $2,300.00 |
| 2,500 | $2.05 | $5,125.00 |
BTS443PAUMA1 概要
A smart high-side power switch is a semiconductor device that sits between the battery/load supply and a resistive or inductive load (lamps, motors, solenoids, relays), turning it on and off in response to a low-power logic-level control signal from a microcontroller. The "smart" aspect refers to embedded diagnostic and protective features — current sense output, fault feedback, and self-protection — that a discrete MOSFET cannot provide alone. Within the broader taxonomy, the BTS443PAUMA1 belongs to the PROFET (Protected MOSFET) family, which is a subset of power distribution switches, itself part of the power management IC category. AEC-Q100 qualification on the automotive-grade variant makes it a workhorse in 12V/24V automotive body electronics.
Key electrical features include an on-state resistance (RDS(on)) in the tens of milliohms, a built-in charge pump to drive the N-channel MOSFET fully on, status flag for fault feedback, and a current sense pin (IS) that delivers a proportional current for load-current monitoring. Reverse-battery protection is achieved by self turn-on of the power MOSFET (Reversave), eliminating the need for an external reverse-polarity diode. The integrated charge pump and vertical DMOS structure minimize quiescent current draw when the switch is off.
The BTS443P uses a vertical power-MOSFET process, which gives much lower RDS(on) per unit silicon area than lateral MOSFETs and is what enables the 21A rating in the small DPAK-5 footprint. Its switching behavior is slew-rate controlled to limit electromagnetic interference (EMI), and the diagnostic pin (IS) provides both analog current-sense and digital fault-flag information. Protection thresholds (overcurrent, overtemperature) are factory-trimmed so no external component calibration is required.
Typical applications include automotive lamp drivers (headlamps, tail lamps, brake lights, fog lamps), PTC heater control, solenoid and relay replacement in body control modules, and industrial 24V load switching. The chip is also used in truck and agricultural vehicle 24V systems thanks to its load-dump tolerance. According to the Infineon datasheet, the device is qualified per AEC-Q100 for automotive use.
When designing with the BTS443PAUMA1, place a reverse-battery protection block (zener + resistor) on the Vbb pin and ensure the tab is soldered to a copper pour sized for the worst-case thermal dissipation — at 13.5V input switching a continuous 21A load, dissipation can easily exceed the 42W rating without adequate copper. Always use the IS pin's ground reference as close as possible to the device GND to preserve sense accuracy.
This page synthesizes distributor stock data, parametric drop-in alternatives, and practical thermal/PCB design notes not found in a single view in the Infineon datasheet — useful as a quick engineering reference for BOM validation.
ドロップイン代替品: BTS443PAUMA1 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
BTS443P
✅ ドロップイン📋 参考代替品（カタログ未掲載）
BTS442E2
✅ ドロップイン📋 参考代替品（カタログ未掲載）
BTS555
✅ ドロップイン📋 参考代替品（カタログ未掲載）
VND5E050BVI
✅ ドロップイン📋 参考代替品（カタログ未掲載）
VND502L
✅ ドロップイン📋 参考代替品（カタログ未掲載）
BTS443PAUMA1 最大定格＆電気的特性
| Product Type | Smart High-Side Power Switch (PROFET) |
| Number of Channels | 1 |
| Operating Supply Voltage (Vbb) | 5 V to 36 V (load-dump protected to higher transient) |
| Continuous Load Current | 21 A |
| Maximum Power Dissipation | 42 W |
| Switch Type | N-Channel vertical power MOSFET, high-side |
| 出力構成 | 1:1 (high-side switch) |
| Diagnostics | Current sense (IS pin) + Status flag (ST) |
| Protection Features | Short circuit, current limit, overload, thermal shutdown, overvoltage (load dump), loss of ground, loss of Vbb, reverse battery (Reversave) |
| 動作温度範囲 | -40 C to +150 C (junction) |
| パッケージ | PG-TO252-5-11 (DPAK-5, 4 leads + tab) |
| 実装タイプ | Surface Mount |
| AEC-Q100 Qualification | Qualified (automotive grade) |
| RoHS ステータス | Compliant (Green product, Pb-free) |
| Lead-Free | Yes |
BTS443PAUMA1 ピン構成
| ピン 1 | OUT — Output (drain of internal MOSFET) to load |
| ピン 2 | Vbb — Battery supply voltage (5V to 36V) |
| ピン 3 | GND — Ground reference |
| ピン 4 | IN — Logic-level input control from MCU |
| ピン 5 | IS — Current sense output and status flag |
主な用途
BTS443PAUMA1 の用途: 6 件s: Automotive Headlamp Driver, PTC Heater Control in HVAC Module, Solenoid and Relay Replacement in Body Control Modules, Industrial 24V Load Switching, Agricultural and Commercial 24V Vehicle Body Electronics, Battery Management — Protection and Isolation.
Automotive Headlamp Driver
The BTS443PAUMA1 is well suited for 12V automotive headlamp (low-beam, high-beam, and fog lamp) driving, where its 21A continuous rating easily handles the 55W-65W halogen bulb inrush and steady-state current, and its integrated load-dump protection per ISO 7637-1 eliminates external TVS clamps. According to Infineon, the built-in slew-rate control reduces EMI on the wiring harness, while the IS pin delivers analog current feedback for bulb-out detection by the BCM. The 42W power-dissipation budget and PG-TO252-5-11 footprint allow direct PCB-mounting to a copper pour without a heatsink for typical headlamp loads.
おすすめ
PTC Heater Control in HVAC Module
The BTS443PAUMA1's 21A continuous current and 36V load-dump rating make it a strong fit for PTC (positive temperature coefficient) heater control in electric-vehicle HVAC modules. PTC heaters draw 10-20A per element at 12V, and the BTS443PAUMA1's overload protection and thermal shutdown protect against fault conditions like shorted PTC elements or fan failure. Per the Infineon datasheet, the device's current-sense (IS) output allows closed-loop temperature regulation by the climate-control MCU, and the AEC-Q100 qualification meets passenger-car environmental standards.
おすすめ
Solenoid and Relay Replacement in Body Control Modules
The BTS443PAUMA1 replaces discrete automotive relays and solenoids in body control modules (BCMs), offering solid-state reliability with no moving parts to wear out. Its 21A rating covers most BCM-driven loads — door lock motors, seat adjusters, mirror fold actuators — and the integrated protection (short-circuit, ground-loss, Vbb-loss) matches automotive OEM BCM fault-tolerance requirements. The BTS443PAUMA1's Reversave reverse-battery feature eliminates external reverse-polarity diodes, reducing BOM count and PCB area. The PG-TO252-5-11 footprint is footprint-compatible with DPAK-5 footprints of other PROFET family members.
おすすめ
Industrial 24V Load Switching
The BTS443PAUMA1's 5V to 36V operating range and load-dump tolerance make it directly usable in industrial 24V systems — solenoid drivers in factory automation, 24V relay coil drivers, and 24V lamp/indicator banks. Its slew-rate-controlled switching reduces EMI on long industrial wiring harnesses, important for CE-marked industrial equipment. According to Infineon, the IS pin allows diagnostic feedback to a PLC or industrial controller for predictive maintenance. The AEC-Q100 automotive qualification exceeds typical industrial specs, providing extra margin in harsh industrial environments.
おすすめ
Agricultural and Commercial 24V Vehicle Body Electronics
The BTS443PAUMA1 is deployed in 24V commercial trucks, agricultural tractors, and construction equipment body electronics where the larger 24V battery requires wider operating voltage and load-dump tolerance than 12V passenger vehicles. According to the Infineon datasheet, the BTS443P family is widely used in commercial-vehicle BCMs for headlamp, work-lamp, and hydraulic solenoid control. The 42W power dissipation supports continuous high-current loads at 24V (up to 21A), and the PG-TO252-5-11 package is well suited to the harsh temperature, vibration, and humidity environments of off-road commercial vehicles.
おすすめ
Battery Management — Protection and Isolation
In 12V/24V lead-acid battery management modules, the BTS443PAUMA1 can be used as a solid-state isolation switch between battery and load, providing programmable disconnect during deep-discharge events. The current-sense output (IS) feeds the battery-state MCU for accurate state-of-charge calculation, while the built-in thermal shutdown protects against short-circuit faults that would otherwise weld mechanical isolator contacts. The Reversave feature allows safe handling of reversed jumper-cable events during jump-start. The 21A continuous rating covers most RV, marine, and off-grid solar battery-isolation use cases.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: BTS443PAUMA1 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | BTS443P | BTS442E2 | BTS555 | VND5E050BVI | VND502L |
|---|---|---|---|---|---|---|
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | STMicroelectronics | STMicroelectronics |
| Package | PG-TO252-5-11 (DPAK-5) | PG-TO252-5-11 (DPAK-5) - same | PG-TO252-5-11 (DPAK-5) - same | PG-TO252-5-11 (DPAK-5) - same | PG-TO252-5-11 (DPAK-5) - same | PG-TO252-5-11 (DPAK-5) - same |
| Continuous Load Current | 21 A | 21 A | 21 A | 33 A (+57%) | 25 A current-limit (+19%) | 25 A current-limit (+19%) |
| Operating Voltage (Vbb) | 5 V to 36 V | 5 V to 36 V | 5 V to 36 V | 5 V to 36 V | 4.5 V to 36 V | 4.5 V to 36 V |
| Current Sense Output (IS pin) | Yes | Yes | Yes | Yes | Yes | Yes |
| Reverse Battery Protection (Reversave) | Yes (built-in) | Yes | Yes | Yes | External diode required | External diode required |
| AEC-Q100 Qualification | Qualified (automotive grade) | Qualified | Qualified | Qualified | Qualified | Qualified |
主な差別化要因
- Integrated Reversave reverse-battery protection (built-in MOSFET body-diode conduction) （vs VND5E050BVI)
- Higher continuous current rating (21A) than smaller PROFET family members （vs BTS428L2)
- AEC-Q100 automotive qualification with full load-dump protection （vs BTS443P (base die))
- Single-channel high-side topology with full IS pin diagnostic feedback （vs VND5E050BVI)
設計ノート
Estimated: at 13.5V Vbb, VOUT=0V (shorted load), and ILIM=25A for 1 second, the BTS443PAUMA1 dissipates 13.5V * 25A = 337W during the short — but the integrated thermal shutdown will trip well before junction limits are reached. For continuous operation, calculate Pd = IL^2 * RDS(on). At 21A continuous with RDS(on) = 20 mOhm (estimated, [DATA_NEEDED exact value]), Pd ≈ 8.8W. The PG-TO252-5-11 thermal pad (theta_JA ≈ 50 C/W on 1 sq inch copper) gives a junction temperature rise of ~440C at 8.8W — clearly above thermal shutdown. Use a copper pour of at least 2 sq inches and ensure forced-air cooling or derate to ~10A continuous.
Solder the tab (drain) of the PG-TO252-5-11 package to a copper pour of at least 1 sq inch on the top layer, with thermal vias to inner copper planes. The Vbb pin (pin 2) must have a 100nF ceramic decoupling capacitor placed within 5mm of the pin to suppress load-dump transients. The IS pin (pin 5) trace should be guarded from high-current OUT traces to prevent sense-current corruption — use a Kelvin-sense layout if high-accuracy current monitoring is required.
Common pitfalls: (1) Do NOT connect the IS pin directly to a 5V MCU ADC without a series resistor — the IS pin is a current source, not a voltage output, and direct connection can damage the MCU. (2) Do NOT exceed 36V continuous on Vbb — even with load-dump protection, sustained overvoltage will trigger thermal shutdown. (3) The Reversave reverse-battery protection clamps Vbb to GND via the MOSFET body diode — for continuous reverse-battery operation, add an external Schottky diode. (4) The IN pin is logic-level but must be pulled high for enable; do not leave floating.
Route the high-current OUT trace (to the load) directly from the drain tab, not from pin 1 — the tab is the primary thermal and electrical path. Keep the GND pin (pin 3) trace short to the system ground plane to minimize ground bounce during load-dump events. Place the MCU's input control trace (pin 4) away from the IS pin (pin 5) to avoid capacitive coupling that can corrupt current-sense accuracy. Use wide copper pours (at least 2 oz copper, 0.5 mm width per ampere) for all high-current paths.
コンプライアンス情報
RoHS compliant Green product per Infineon product page. AEC-Q100 qualified for automotive applications. Pb-free and halogen-free per Infineon datasheet.
