BSP742R - 1.5A Smart High-Side Switch | Infineon PROFET
部品番号: BSP742R ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.65 | $16.50 |
| 100 | $1.42 | $142.00 |
| 500 | $1.21 | $605.00 |
| 1,000 | $1.05 | $1,050.00 |
| 2,500 | $0.92 | $2,300.00 |
BSP742R 概要
An automotive-grade high-side switch (also called a smart power switch or PROFET) is an integrated circuit that drives resistive or inductive loads connected between the output pin and ground by switching the load's high-side connection to the battery rail. Compared with a discrete MOSFET plus fuse solution, a PROFET adds on-chip protection (overload, short-circuit, thermal shutdown, overvoltage) and a diagnostic feedback pin that reports fault status to the microcontroller, reducing BOM count and PCB area. Within the power-management hierarchy, BSP742R belongs to: load driver -> high-side switch -> power distribution IC -> power management semiconductor. Within Infineon's portfolio it sits in the Classic PROFET 12V family, optimized for nominal 12 V automotive buses.
Key features include a 70 mΩ on-state resistance (typical), embedded current limitation, short-circuit protection, thermal shutdown with auto-restart, overvoltage protection including load-dump, fast demagnetization of inductive loads, reverse-battery protection via an integrated resistor, and an open-drain status flag. CMOS-compatible ground-referenced control input simplifies direct connection to 3.3 V or 5 V microcontrollers without level shifters.
The internal architecture combines an N-channel vertical power MOSFET driven by an on-chip charge pump so the output can be held at the battery rail while the gate is boosted above Vbb. This monolithic integration in Infineon's Smart SIPMOS process gives the BSP742R very low quiescent current and robust avalanche capability for unclamped inductive switching events.
Typical applications include automotive body electronics (lighting, door lock, mirror heaters), 12 V industrial relay and solenoid replacement, HVAC actuators, and small DC motor drive. Designers favor the BSP742R when a single-channel protected high-side driver with diagnostic feedback is needed in a compact SO-8 footprint.
Design trade-off to consider: the BSP742R's 1.5 A nominal rating is shared across the whole channel. For pulse loads exceeding the continuous rating, confirm SOA thermal limits in the datasheet and calculate steady-state dissipation using P = IL² × RDS(on). The exposed die pad (PG-DSO-8) must be soldered to a sufficient copper pour to meet theta_JA; otherwise thermal shutdown may trigger prematurely under heavy load.
ドロップイン代替品: BSP742R — 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。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: BSP742R （同一形状・フットプリント） — 相違点: Package, Load Dump Tolerance, Operating Temperature Range, Reverse Battery Protection, Thermal Shutdown.
クイック比較ツール — 並列比較する代替部品を選択:
BSP742RIXUMA1
✅ ドロップイン✓ 在庫あり
$0.96 / 個
データシートを見る →BSP752RXUMA2
✅ ドロップイン✓ 在庫あり
$0.94 / 個
データシートを見る →BSP742T
✅ ドロップイン📋 参考代替品（カタログ未掲載）
BTS50010-1TMA
✅ ドロップイン📋 参考代替品（カタログ未掲載）
VN5E160AS-E
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ITS436L2
✅ ドロップイン📋 参考代替品（カタログ未掲載）
BSP742R 最大定格＆電気的特性
| Product Family | Classic PROFET 12V |
| 機能 | Smart High-Side Power Switch |
| Number of Channels | 1 |
| RDS(on) (typical) | 70 mΩ |
| Nominal Load Current | 1.5 A |
| Supply Voltage (Vbb) | 5.5 V to 34 V |
| Load Dump Tolerance | up to 40 V |
| 動作温度 | -40C to +150C (TJ) |
| Input Type | CMOS-compatible, ground-referenced |
| Diagnostic Output | Open-drain status flag |
| Protection Functions | Overload, short-circuit, thermal shutdown with restart, overvoltage, reverse battery, fast demagnetization |
| パッケージ | PG-DSO-8 (DSO-8) |
| 実装タイプ | Surface Mount |
| Technology | Smart SIPMOS (monolithic) |
| RoHS ステータス | Compliant |
| Automotive Qualified | Yes (per Infineon product page) |
BSP742R ピン構成
| ピン 1 | OUT — Power output to load |
| ピン 2 | Vbb — Battery supply voltage |
| ピン 3 | GND — Ground |
| ピン 4 | IN — CMOS-compatible control input |
| ピン 5 | NC — Not connected (per datasheet) |
| ピン 6 | ST — Diagnostic status output (open-drain) |
| ピン 7 | NC — Not connected (per datasheet) |
| ピン 8 | Vbb — Battery supply voltage (second Vbb pin) |
安全動作領域 (DC)
主な用途
BSP742R の用途: 7 件s: Automotive Lighting Driver, Automotive Door Lock Actuator, HVAC Blower Resistor Replacement, Industrial 24 V Solenoid Driver, 12 V Small DC Motor Drive, Relay Replacement in Industrial Control, Battery-Powered LED Indicator Driver.
Automotive Lighting Driver
The BSP742R drives 12 V automotive lamp loads including halogen bulbs, LED modules, and interior lighting from a body controller. Its 1.5 A nominal current handles typical 5-21 W lamp loads while the 70 mΩ RDS(on) keeps conduction loss below 0.16 W at full load - critical for under-hood thermal budgets. Integrated short-circuit and thermal-shutdown protection prevents catastrophic failure when a bulb fails short, and the open-drain status pin reports lamp-out conditions back to the BCM for bulb-failure detection. The 5.5 V to 34 V supply range with 40 V load-dump tolerance handles jump-start and transient events directly without external TVS clamps.
おすすめ
Automotive Door Lock Actuator
The BSP742R replaces electromechanical relays with solid-state switching for door lock actuators and mirror heaters in body electronics modules. The 1.5 A channel rating covers typical lock-motor stall currents while fast demagnetization handles the inductive kickback when the motor releases - eliminating the need for external flyback diodes. Ground-referenced CMOS input allows direct connection to 3.3 V BCM GPIOs without level shifters, simplifying PCB layout. Overload protection prevents PCB trace damage if the actuator seizes, and the diagnostic flag alerts the BCM to a faulted door so it can retry or disable that channel.
おすすめ
HVAC Blower Resistor Replacement
In automotive HVAC modules the BSP742R drives blower motor speed resistors or PWM-switches the blower directly from the climate controller. With 1.5 A continuous current it covers most single-speed blower taps, and the embedded thermal shutdown protects the IC if the blower stalls and current spikes. Reverse-battery protection through the internal resistor simplifies harness design because no external reverse-polarity FET is needed, while the CMOS input allows direct PWM modulation up to the datasheet's specified frequency for variable-speed control. The PG-DSO-8 footprint saves PCB area versus TO-220 discrete MOSFETs.
おすすめ
Industrial 24 V Solenoid Driver
Industrial 24 V solenoid and valve drivers benefit from the BSP742R's 34 V supply headroom and rugged protection suite. The 1.5 A rating covers most small pneumatic and hydraulic solenoid coils, while overload and short-circuit protection prevent coil shorts from damaging the PLC output card. The status feedback pin lets the PLC log which solenoid failed for predictive maintenance, and the wide -40C to +150C junction range handles outdoor and under-cabinet industrial environments. Fast demagnetization handles the inductive kick when the solenoid de-energizes without external snubbers.
おすすめ
12 V Small DC Motor Drive
Small brushed DC motors up to roughly 1.5 A continuous draw - such as window lifters, mirror adjusters, and seat-position actuators - are driven directly by the BSP742R from a body or convenience controller. The 70 mΩ RDS(on) keeps I²R conduction loss low, while thermal shutdown protects the device during motor stall events. Status feedback enables stall detection in software, replacing the mechanical current-sense resistor typically used in discrete designs. The PG-DSO-8 footprint plus on-chip protection shrinks the actuator PCB by 50-70 percent versus discrete solutions.
おすすめ
Relay Replacement in Industrial Control
The BSP742R replaces electromechanical relays in 12-24 V industrial control panels for switching resistive heater elements, indicator lamps, and small solenoid valves. Compared with a relay, the BSP742R offers silent operation, longer lifetime (no mechanical wear), lower coil-drive current (CMOS input vs 30-100 mA relay coil), and integrated fault diagnostics. The status flag feeds back to the controller for closed-loop verification that the load actually energized - a major reliability improvement over relays that can fail contacts without external indication.
おすすめ
Battery-Powered LED Indicator Driver
Low-side-of-power indicator LED strings and panel-backlighting channels are driven by the BSP742R from a 12 V battery rail with PWM dimming via the CMOS control input. The 1.5 A rating covers multi-LED strings up to roughly 5-8 W, while the 70 mΩ RDS(on) keeps efficiency above 95 percent at typical LED forward currents. The diagnostic pin is reused as a PWM feedback or tied off if unused, and reverse-battery protection simplifies harness design in field-deployed equipment like emergency-vehicle light bars.
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: BSP742R — 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 | BSP742RI | BSP752R | BSP742T | BTS50010-1TMA | VN5E160AS-E | ITS436L2 |
|---|---|---|---|---|---|---|---|
| Brand | Infineon | Infineon | Infineon | Infineon | Infineon | STMicroelectronics | Infineon |
| Package | PG-DSO-8 | PG-DSO-8 - same | PG-DSO-8 - same | PG-DSO-8 - same | PG-DSO-8 - same | SO-8 - same footprint | PG-DSO-8 - same |
| Nominal Load Current | 1.5 A | 1.5 A | > 1.5 A (higher rating) | 1.5 A | ~1.5 A | ~1.5 A | ~1.2 A |
| Supply Voltage (Vbb) | 5.5 V to 34 V | 5.5 V to 34 V | 5.5 V to 34 V | 5.5 V to 34 V | 5.5 V to 34 V | 4.5 V to 28 V | 5.5 V to 34 V |
| Diagnostic Output | Open-drain status | Open-drain status | Open-drain status | Open-drain status | Open-drain status | Status output | Open-drain status |
| Thermal Shutdown | Yes (with restart) | Yes (with restart) | Yes (with restart) | Yes (with restart) | Yes (with restart) | Yes | Yes (with restart) |
| Automotive Qualified | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
主な差別化要因
- Higher current headroom in same footprint （vs BSP752R)
- Lower RDS(on) than ITS436L2 （vs ITS436L2)
- Higher Vbb rating than VN5E160AS-E （vs VN5E160AS-E)
設計ノート
Estimated: at 1.5 A load and 70 mΩ RDS(on), conduction loss is roughly P = I² × R = 1.5² × 0.07 = 0.158 W. The PG-DSO-8 package has a typical theta_JA near 50-60 C/W on a standard JEDEC 2s-2p PCB, so the junction rises 8-10 C above ambient - safe below the 150 C thermal shutdown threshold. For continuous 1.5 A operation solder the exposed die pad to at least 1 square cm of copper to keep theta_JA within datasheet limits.
Place a 100 nF ceramic bypass capacitor as close as possible to the Vbb pins (pins 2 and 8) to decouple the charge-pump switching transients. Add a bulk electrolytic (>= 47 uF) at the PCB supply input to absorb load-dump energy. The status pin (ST, pin 6) requires a pull-up resistor (typically 10-100 kΩ) to the MCU's logic rail because it is open-drain. Keep high-current OUT traces short and wide (>= 1 oz copper, >= 0.5 mm width per ampere).
Do not forget the input signal ground-reference: it is referenced to GND, not to Vbb, so a logic-high IN of 3.3 V or 5 V turns the output on. Driving IN above Vbb can inject current through the input clamp - keep VIN within the datasheet absolute-maximum rating. Also confirm that the load's inrush current does not trigger the BSP742R's current limit; if it does, either choose a higher-rated PROFET (BSP752R) or pre-charge the load with an NTC thermistor in series.
Route the GND pin (pin 3) directly to the battery return with a wide, short trace - this is the return for both load current and signal ground. Avoid routing sensitive analog signals across the OUT trace because high dI/dt during demagnetization creates voltage transients on the load side. Place the ST pull-up resistor near the MCU pin, not near the BSP742R, to keep the trace short and reduce EMI pickup on the feedback line.
コンプライアンス情報
RoHS compliant and automotive qualified per Infineon product page. Halogen-free per PG-DSO-8 family datasheet. AEC-Q100 qualification confirmed for automotive variants.
