MC33887PNB - 5A H-Bridge Motor Driver | NXP | QFN-36 (9x9)
MPN： MC33887PNB ✗ 停產MC33887PNB 概覽
An H-Bridge motor driver is a power-stage topology that uses four switching MOSFETs arranged in an H configuration to drive a DC or stepper motor in both forward and reverse directions. It belongs to the broader class of motor driver ICs, which themselves fall under power management semiconductors, sitting between microcontrollers and the mechanical actuators they control. The integration of analog feedback, gate drive, and protection features into one die is what distinguishes a smart H-Bridge from a discrete MOSFET H-Bridge design.
Key features of the MC33887PNB include a precise 1/375th (0.00266) ground-referenced current-sense output at the FB pin for closed-loop torque control, programmable PWM frequencies through the input logic, built-in sleep mode for quiescent current reduction, and comprehensive protection including thermal shutdown, short-circuit protection, and undervoltage lockout. The 9x9 mm PQFN exposed-pad package achieves a low thermal resistance suitable for continuous 5 A operation.
Internally the device uses an N-channel MOSFET H-Bridge driven by an integrated charge pump that generates the gate-boost voltage above the load supply. This architecture yields low RDS(ON) per switch, which directly translates to lower conduction losses and cooler operation at full load. The current feedback is sourced from the high-side drivers, giving a true bidirectional representation of motor current in both forward and reverse rotation.
Typical applications include DC brushed motor control in automotive body electronics, seat and mirror actuators, throttle-by-wire, and small industrial pumps and valves. Its 5 A rating covers most low-voltage brushed DC loads encountered in 12 V automotive and 24 V industrial environments.
When designing with the MC33887PNB, place input bulk capacitors close to the supply pins and use a wide ground pour under the exposed pad to dissipate the 5 W it can produce under worst-case load. The FB pin output must be conditioned with an external op-amp before being fed to the microcontroller ADC.
This page synthesizes distributor pricing, drop-in alternative listings, and practical design notes not found in the manufacturer datasheet alone.
直接替換替代品，適用於 MC33887PNB — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： MC33887PNB （相同外形與佔位） — 差異在於 Charge Pump, Package, Protection Features.
MC33887PNB-R2
✅ 直接替換📋 參考替代品（不在目錄中）
MC33887EK
✅ 直接替換📋 參考替代品（不在目錄中）
TLE5205-2G
✅ 直接替換📋 參考替代品（不在目錄中）
MC33887PNB 最大額定值與電氣特性
| 功能 | H-Bridge motor driver with load current feedback |
| 拓撲 | Monolithic H-Bridge, N-channel MOSFET output |
| Supply Voltage (V+) | 5 V to 28 V |
| Continuous Load Current | 5 A |
| Current Sense Ratio | 1/375 (0.00266) |
| Current Sense Output (FB pin) | Ground-referenced analog |
| 工作溫度 | -40 C to +125 C |
| Control Inputs | IN1, IN2 logic inputs |
| Sleep Mode | Yes (low quiescent current) |
| 封裝 | 36-PWR QFN (9x9 mm) with exposed pad |
| 安裝類型 | Surface Mount |
| Charge Pump | Integrated |
| Protection Features | Thermal shutdown, short-circuit, undervoltage lockout |
| RoHS 狀態 | Compliant (per NXP product page) |
| 生命週期狀態 | No Longer Manufactured (NXP product page) |
MC33887PNB 36-pwr qfn (9x9 mm) with exposed pad 腳位配置指南
MC33887PNB（36-pwr qfn (9x9 mm) with exposed pad 封裝）的腳位配置。 此功率元件具有閘極、汲極與源極端子。對於非極性封裝，請參閱製造商資料表以取得確切的第 1 腳方向與佈局詳細資訊。常見應用包括電源設計、馬達驅動與負載切換。
無詳細腳位定義資料： MC33887PNB.
請參閱 資料表 以查看完整腳位配置。
典型應用
MC33887PNB 適用於 6 應用s: Automotive Body Electronics Actuators, DC Brushed Motor Speed Control, Industrial Solenoid and Valve Drivers, Robotics and Small Motor Drives, Throttle-by-Wire and EGR Valves, Battery-Powered Portable Equipment.
Automotive Body Electronics Actuators
The MC33887PNB is well suited to drive brushed DC motors in 12 V automotive body modules such as power seat adjusters, power mirror tilt/extend, power liftgate latches, and power sliding doors. Its 5 A continuous output covers most seat-track and mirror actuators, and the 5 V to 28 V supply tolerance easily handles 12 V automotive load-dump and cold-crank transients. The 1/375 ground-referenced FB output lets the body control module run closed-loop torque control to detect stall conditions and prevent motor damage when the actuator reaches a mechanical endstop. Place input bulk capacitance close to the supply pins and use a wide copper pour under the exposed pad to keep junction temperature within the -40 C to +125 C operating envelope.
推薦
DC Brushed Motor Speed Control
The MC33887PNB drives DC brushed motors in speed-controlled applications such as small fans, pumps, and conveyor rollers. The integrated charge pump and low RDS(ON) N-channel MOSFETs keep conduction losses low at full 5 A load, while the 1/375 current-sense output enables precise closed-loop current limiting to protect the motor windings from stall damage. Using IN1 and IN2 logic inputs, the host microcontroller generates a PWM signal at audio frequencies above 20 kHz to make the drive silent for human occupants. The exposed thermal pad must be soldered to at least 1 square inch of inner-layer copper to sustain continuous 5 A operation without triggering thermal shutdown.
推薦
Industrial Solenoid and Valve Drivers
The MC33887PNB drives 24 V industrial solenoids and proportional valves in factory automation. Its 28 V supply ceiling handles nominal 24 V industrial rails plus tolerance, and the H-Bridge allows bidirectional drive for proportional flow control valves used in hydraulic and pneumatic systems. The integrated current feedback gives the PLC analog telemetry of actual solenoid current, which can be used to detect stuck valves and to implement soft-start ramps that reduce water-hammer effects. Thermal shutdown protects against continuous over-current conditions, and the sleep mode reduces quiescent current during machine standby to meet industrial energy-saving directives.
推薦
Robotics and Small Motor Drives
The MC33887PNB drives brushed DC gear motors used in hobby robotics, small CNC axes, and educational robot platforms. Its 5 A capability covers wheel motors on small autonomous vehicles and pan/tilt motors on vision systems. The 1/375 current feedback allows the robot controller to detect wheel stall when the robot collides with an obstacle, triggering safety stop without external current-sense resistors that would add cost. The 36-PWR QFN (9x9 mm) footprint fits compact embedded boards, and the integrated charge pump eliminates the external bootstrap capacitors that discrete H-Bridge designs require, simplifying PCB layout.
推薦
Throttle-by-Wire and EGR Valves
The MC33887PNB drives the brushed DC motor in electronic throttle bodies and exhaust gas recirculation (EGR) valves where precise bidirectional torque control is required. The 1/375 ground-referenced FB output allows the engine control unit to command and verify motor torque in real time, supporting OBD-II diagnostics and limp-home modes when the throttle sticks. The 5 A continuous rating exceeds typical 2-3 A throttle-body motor currents, providing safety margin for cold-engine operation when viscosity increases. Operating from 5 V to 28 V allows the part to survive load-dump on the 12 V automotive bus without external protection.
推薦
Battery-Powered Portable Equipment
The MC33887PNB drives brushed motors in cordless power tools, electric bicycles, and other portable battery-powered equipment. The integrated sleep mode minimizes quiescent current draw on the battery during standby, extending runtime between charges. At 5 A continuous the part can drive small spindle motors in Dremel-style tools and water-pump motors in portable sprayers. Designers must note that the 5 V minimum supply voltage rules out single-cell Li-ion operation (3.0 V to 4.2 V), but the part runs comfortably from 3-cell to 6-cell Li-ion packs used in modern cordless tools, with the 28 V ceiling providing adequate headroom under load.
推薦
工程參考資料，適用於 MC33887PNB — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | MC33887PNB-R2 | MC33887EK | TLE5205-2G |
|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | Infineon |
| Package | 36-PWR QFN (9x9 mm) | 36-PWR QFN (9x9 mm) | 36-PWR QFN (9x9 mm) | Multiwatt-15 |
| Continuous Load Current | 5 A | 5 A | 5 A | 5 A |
| Lifecycle Status | Obsolete (No Longer Manufactured) | Obsolete (No Longer Manufactured) | Obsolete (No Longer Manufactured) | Active |
主要差異化特點
- Reel packaging variant (對比MC33887PNB-R2)
- QFN surface-mount footprint (對比TLE5205-2G)
- 1/375 ground-referenced current sense (對比TLE5205-2G)
設計說明
The MC33887PNB dissipates up to approximately 5 W at full 5 A load with 1 V drop across the H-Bridge. With thermal resistance around 1-2 C/W junction-to-case on the exposed pad, junction temperature rises 5-10 C above case temperature. Solder the exposed pad to at least 1 square inch of inner-layer copper to keep the junction within the 125 C limit at ambient temperatures above 85 C. Estimated dissipation figures derived from VIN-VOUT differential; verify against the manufacturer SOA curve for the actual operating condition.
Place input bulk capacitors (minimum 100 uF) within 5 mm of the V+ supply pins to handle the current spikes during PWM transitions. The exposed thermal pad must have a continuous copper pour on the top layer and multiple thermal vias (0.3 mm drill, 0.6 mm pad, 1.0 mm pitch) to inner-layer ground planes. Keep logic traces (IN1, IN2, EN) away from the high-current motor output traces to avoid capacitive coupling that could falsely trigger logic transitions.
Do not exceed the absolute maximum supply voltage of 28 V; load-dump pulses on 12 V automotive buses can reach 40 V and require external TVS protection. The FB pin current-sense output is NOT designed to drive low-impedance loads directly - always buffer it through an op-amp with at least 10 kohm input impedance. Float or ground unused logic inputs to prevent the H-Bridge from entering an unintended braking mode.
合規資訊
RoHS compliance per NXP product page. REACH, AEC-Q100, halogen-free, and conflict-minerals status not explicitly confirmed in the verified web data.
