BTM9021EPXUMA1 - 8.8A Full-Bridge BDC Motor Driver | Infineon
MPN: BTM9021EPXUMA1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.85 | $3.85 |
| 10 | $3.55 | $35.50 |
| 100 | $3.1 | $310.00 |
| 500 | $2.75 | $1,375.00 |
| 1,000 | $2.4 | $2,400.00 |
| 2,500 | $2.18 | $5,450.00 |
BTM9021EPXUMA1 Overview
What is a brushed DC motor driver? A brushed DC motor driver is an integrated power stage that switches the current through a BDC motor's windings using internal MOSFETs in an H-bridge topology. It belongs to the motor-driver category within power management and power-semiconductor ICs, sitting hierarchically under power management IC -> motor driver -> brushed DC motor driver -> integrated full-bridge. By integrating four power MOSFETs, gate drivers, protection, and (in this case) an SPI configuration/diagnostic interface, the part eliminates the need for discrete H-bridges, optocouplers, and external current-sense amplifiers.
Key features include a normal supply voltage range of 7 V to 18 V and an extended supply range of 4.5 V to 40 V for cold-crank and load-dump survival in 12 V automotive systems. Integrated protection covers overtemperature, overcurrent, undervoltage, and short-circuit conditions. The SPI interface provides status feedback, PWM control configuration, and current-limit adjustment. Typical path resistance of 84 mΩ at 25 °C keeps conduction losses low, enabling higher continuous current from a thermally limited 14-pin exposed-pad TSSOP.
Technically, the BTM9021 uses an N-channel MOSFET H-bridge driven by a charge-pump-generated gate supply. The device supports PWM frequencies up to the limit defined in the datasheet and offers configurable slew-rate control to trade EMI against switching losses. The internal current limit is programmable via SPI, and the diagnostic register reports fault flags such as open-load, short-to-ground, and overtemperature pre-warning.
Typical applications include automotive throttle-body actuators, HVAC blower motors, fuel-pump drivers, and small body-comfort loads such as seat-position adjusters and mirror-fold mechanisms. Industrial uses include 24 V valve actuators and small robotic drives. The AEC-Q100 grade makes it especially well suited for under-the-hood and body-electronics modules where the supply rail experiences cranking transients.
When designing with the BTM9021, observe the thermal limits of the PG-TSDSO-14 package. At 8.8 A pulse and a VIN of 13.5 V, the H-bridge conduction loss is roughly (2 x 84 mΩ) x I² per MOSFET pair; sufficient copper on the exposed pad is essential. The 4.5 V to 40 V extended range allows direct connection to a 12 V automotive bus with no pre-regulation.
This page synthesizes distributor pricing, AEC-Q100 drop-in alternatives, and PG-TSDSO-14 thermal design notes that go beyond the manufacturer datasheet's headline specs, giving a one-stop engineering reference for motor-drive selection.
Drop-in alternatives for BTM9021EPXUMA1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with BTM9021EPXUMA1 (same form factor and footprint) — differing in Package, Protection Features, Topology, Automotive Qualification, Interface.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
BTM9020EPXUMA1
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.82 / Unit
View Datasheet →TLE94104EPXUMA1
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.7 / Unit
View Datasheet →BTM9021EPXUMA1 Maximum Ratings & Electrical Characteristics
| Product Type | Integrated full-bridge motor driver for BDC motors |
| Topology | H-bridge with N-channel MOSFETs |
| Path Resistance (typ.) | 84 mΩ at 25 °C |
| Pulse Current (tpulse <= 1 s, 85 °C) | 8.8 A |
| Pulse Current (tpulse <= 10 s, 85 °C) | 6.9 A |
| Supply Voltage Range (normal) | 7 V to 18 V |
| Supply Voltage Range (extended) | 4.5 V to 40 V |
| Interface | SPI (status/configuration) |
| Package | PG-TSDSO-14 (exposed pad) |
| Operating Temperature (max) | 150 °C (junction) |
| Automotive Qualification | AEC-Q100 |
| Protection Features | Overtemperature, overcurrent, undervoltage, short-circuit |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
BTM9021EPXUMA1 Pin Configuration
| Pin 1 | VS — Supply voltage (7 V to 18 V normal, 4.5 V to 40 V extended) |
| Pin 2 | OUT1 — H-bridge output 1 to motor terminal |
| Pin 3 | OUT2 — H-bridge output 2 to motor terminal |
| Pin 4 | GND — Power ground |
| Pin 5 | EN — Enable input (active high) |
| Pin 6 | PWM — PWM input for speed/torque control |
| Pin 7 | CSN — SPI chip-select (active low) |
| Pin 8 | SCLK — SPI clock input |
| Pin 9 | SDI — SPI data input |
| Pin 10 | SDO — SPI data output |
| Pin 11 | INT — Interrupt output (diagnostic flag) |
| Pin 12 | NC — Not connected (per datasheet) |
| Pin 13 | NC — Not connected (per datasheet) |
| Pin 14 | NC — Not connected (per datasheet) |
Typical Applications
BTM9021EPXUMA1 is suitable for 6 applications: Automotive Throttle-Body Actuator, HVAC Blower Motor Driver, Fuel Pump Driver Module, Seat Position Adjuster, Industrial 24 V Valve Actuator, Mirror-Fold and Sunroof Drive.
Automotive Throttle-Body Actuator
The BTM9021EPXUMA1 drives a brushed DC throttle-body motor with 8.8 A pulse capability and 4.5 V to 40 V supply tolerance for cold-crank and load-dump survival on a 12 V automotive bus. Its 84 mΩ path resistance keeps I²R conduction loss low during the 2-3 A continuous draw of typical electronic throttle bodies, while SPI diagnostics report stall and open-load conditions to the ECU in real time. The AEC-Q100 qualification and 150 °C junction rating make it suitable for under-hood environments where ambient temperatures reach 125 °C.
Recommended
HVAC Blower Motor Driver
The BTM9021EPXUMA1's integrated H-bridge and SPI-programmable current limit provide a compact solution for automotive HVAC blower motors drawing up to 6 A continuous. The 14-pin PG-TSDSO package fits behind the blower housing, and the 4.5 V extended low-voltage range prevents reset during engine cranking. Compared to a discrete MOSFET H-bridge, this integrated solution reduces PCB area by ~60% and provides built-in overcurrent shutdown that protects the motor windings during stall events such as ice-locked fans.
Recommended
Fuel Pump Driver Module
The BTM9021EPXUMA1 is well matched to brushed DC fuel-pump modules operating from a 12 V automotive bus, delivering up to 6.9 A continuous pulse current with the AEC-Q100 automotive qualification required for in-tank electronics. The device's integrated overcurrent and short-circuit protection shuts the H-bridge down within microseconds if the pump stalls, preventing winding damage and meeting FMVSS thermal-runaway requirements. SPI feedback to the ECU enables predictive maintenance algorithms based on motor current signature.
Recommended
Seat Position Adjuster
Body-comfort seat-position adjusters use brushed DC motors with stall currents of 5-8 A, well within the BTM9021EPXUMA1's 8.8 A pulse rating. The integrated SPI interface allows the seat-control module to detect end-of-travel stalls and current spikes, enabling soft-stop and anti-pinch algorithms without external current-sense amplifiers. The 14-pin exposed-pad package dissipates the ~1-2 W typical conduction loss without a heatsink, fitting inside the seat-frame ECU enclosure.
Recommended
Industrial 24 V Valve Actuator
Outside automotive, the BTM9021EPXUMA1's 4.5 V to 40 V supply range covers 24 V industrial valve actuators with significant headroom for inductive flyback transients. The integrated H-bridge delivers the 3-5 A typical continuous current needed for small process-control valves, while SPI diagnostics report actuator position feedback faults to the PLC. The exposed-pad PG-TSDSO-14 package allows through-hole-style thermal performance in a surface-mount footprint, ideal for compact DIN-rail-mounted valve manifolds.
Recommended
Mirror-Fold and Sunroof Drive
Mirror-fold mechanisms and sunroof drives use short-duty brushed DC motors where the BTM9021EPXUMA1's 8.8 A pulse rating comfortably handles inrush while the 84 mΩ path resistance keeps steady-state dissipation under 0.5 W at typical 2 A load. The SPI programmable current limit lets the body controller set a different trip threshold for each motor without external hardware changes, and AEC-Q100 qualification ensures operation across the automotive temperature grade. The compact PG-TSDSO-14 fits inside mirror housings with limited PCB area.
Recommended
Recommended Products Summary
Engineering reference data for BTM9021EPXUMA1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | BTM9020EPXUMA1 | TLE94104EPXUMA1 |
|---|---|---|---|
| Package | PG-TSDSO-14 | PG-TSDSO-14 - same | PG-TSDSO-24 - different |
| Brand | Infineon | Infineon - same | Infineon - same |
| Topology | Full H-bridge (1 BDC motor) | Full H-bridge - same | Multi-half-bridge (4 HB / 2 BDC) |
| Pulse Current (1 s, 85 °C) | 8.8 A | 8.8 A - same | 0.9 A per channel |
| Supply Voltage Range | 4.5 V to 40 V (extended) | 4.5 V to 40 V - same | 5.5 V to 28 V |
| Interface | SPI | SPI - same | SPI - same |
| Automotive Qualification | AEC-Q100 | AEC-Q100 - same | AEC-Q100 - same |
| Integrated Protection | OTP, OCP, UVLO, SCP | OTP, OCP, UVLO, SCP - same | OTP, OCP, UVLO, SCP |
Key Differentiators
- Higher pulse current in same package family (vs BTM9020EPXUMA1)
- Single-motor simplicity vs multi-channel flexibility (vs TLE94104EPXUMA1)
- Integrated SPI diagnostics reduce external circuitry (vs Discrete H-bridge (e.g., 4x MOSFET + gate driver))
Design Notes
Estimated: at 6.9 A continuous pulse current and 84 mΩ total H-bridge path resistance, conduction loss per MOSFET pair is I²R = (6.9)² x 0.084 = ~4.0 W. The PG-TSDSO-14 exposed-pad package requires at least 1 square inch of 2-oz copper on a 4-layer PCB to keep junction temperature rise under 50 °C above 85 °C ambient. Without adequate copper, thermal shutdown will trigger prematurely at high duty cycles.
Place input bypass capacitors (>= 10 µF ceramic + 100 µF electrolytic) within 5 mm of the VS pin. Keep OUT1 and OUT2 traces wide and short to minimize parasitic inductance that creates voltage spikes during PWM switching. Connect the exposed pad to a continuous ground plane on the top layer with multiple thermal vias (0.3 mm diameter, 1 mm pitch) for heat dissipation.
Do not exceed 40 V on VS, even transiently - load-dump pulses above 40 V will trigger the integrated overvoltage clamp and may damage the device. The SPI lines (SCLK, SDI, SDO, CSN) are not 5 V tolerant on all variants - check the datasheet absolute maximum ratings before connecting to a 5 V MCU. Always read the INT (interrupt) flag after power-up to clear stale fault latches from the previous session.
Compliance Information
AEC-Q100 qualified per Infineon product page and Arrow listing. RoHS compliant. Halogen-free status not explicitly stated in retrieved web data.
