VN771KP-E - Quad Smart Power 95mOhm 9A 36V Half-Bridge | STMicroelectronics
MPN: VN771KP-E ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.36 | $336.00 |
| 500 | $2.92 | $1,460.00 |
| 1,000 | $2.55 | $2,550.00 |
VN771KP-E Overview
A half-bridge driver is a power-management IC that switches a low-side and high-side MOSFET in a half-bridge (H-bridge leg) topology to commutate DC loads such as brushed motors, solenoids, and lamps. Each half-bridge can source or sink current depending on the active switch, and a full H-bridge is formed by pairing two channels. This part of the broader power management semiconductor hierarchy is widely used in automotive body electronics (BCM - body control modules), industrial relay drivers, and small DC motor control subsystems.
Key features of the VN771KP-E include four independent 95 mOhm RDSon half-bridge outputs, an operating supply range of 5.5 V to 36 V, TTL/CMOS-compatible logic inputs, integrated charge pump for the high-side drive, status flag output, and protection features including over-temperature shutdown, short-circuit (overcurrent) latched shutdown, undervoltage lockout (UVLO), open-load detection in OFF state, and ESD protection per automotive-style requirements.
From an architecture perspective, the device uses N-channel power MOSFETs on both high-side and low-side with a built-in charge pump to generate the gate drive voltage above VCC for the high-side switches. The logic inputs are designed for 3.3 V and 5 V microcontrollers, with low standby current for quiescent-sensitive applications. Diagnostic feedback (open-load, thermal, short) is multiplexed through a single STATUS pin for microcontroller monitoring.
Typical applications include automotive body control units driving door-lock motors, window lifters, mirror adjusters, seat motors, lighting relays, and HVAC flap actuators. The wide supply range tolerates cranking transients on 12 V automotive rails while the 9 A continuous rating supports high-inrush loads such as DC motors at startup. The IC also suits industrial relay and solenoid driver boards and small appliance motor control where multiple half-bridges per package reduce BOM count and PCB area.
When designing with the VN771KP-E, ensure adequate copper pour on all source pins to share the high ground-return current and to keep RDSon losses within thermal limits. Decouple VCC with a low-ESR 100 nF ceramic close to the IC plus a bulk electrolytic on the board. Always observe the maximum junction temperature of 150 C and derate power dissipation with proper PCB heatsinking when running multiple channels near full load simultaneously.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes for the VN771KP-E that are not collocated in the manufacturer datasheet, enabling faster sourcing decisions for engineers.
Drop-in alternatives for VN771KP-E — 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 VN771KP-E (same form factor and footprint) — differing in Package, Operating Temperature Range, Topology, Number of Channels, Process Technology.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
VN771KP
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
VN771K-E
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
L9942XPTR
✅ Drop-In📋 Reference alternative (not in catalog)
TLE8203-2
✅ Drop-In📋 Reference alternative (not in catalog)
MC33926PNB
✅ Drop-In✓ In Stock
$4.05 / Unit
View Datasheet →VN771KP-E Maximum Ratings & Electrical Characteristics
| Product Type | Quad Half-Bridge Driver |
| Number of Channels | 4 half-bridges |
| Supply Voltage (VCC) | 5.5 V to 36 V |
| Continuous Output Current per Channel | 9 A |
| On-Resistance (RDSon, typ) | 95 mOhm per MOSFET |
| Topology | N-channel high-side + low-side half-bridge |
| Logic Input Compatibility | TTL / CMOS (3.3 V and 5 V MCU compatible) |
| Charge Pump | Integrated for high-side gate drive |
| Status Output | Yes (multiplexed diagnostic flag) |
| Protection Features | Over-temperature, short-circuit (latched), open-load detection, UVLO |
| Operating Junction Temperature | -40 C to +150 C |
| Package | 28-SO (SO-28) |
| Mounting Type | Surface Mount |
| Application Category | Automotive body, DC motor, relay, solenoid |
| RoHS Status | Compliant |
VN771KP-E Pin Configuration
| Pin 1 | IN1 — Logic input for half-bridge 1 |
| Pin 2 | IN2 — Logic input for half-bridge 2 |
| Pin 3 | IN3 — Logic input for half-bridge 3 |
| Pin 4 | IN4 — Logic input for half-bridge 4 |
| Pin 5 | GND — Power ground return |
| Pin 6 | OUT1 — Half-bridge 1 output (power) |
| Pin 7 | OUT1 — Half-bridge 1 output (power, paralleled) |
| Pin 8 | OUT2 — Half-bridge 2 output (power) |
| Pin 9 | OUT2 — Half-bridge 2 output (power, paralleled) |
| Pin 10 | GND — Power ground return |
| Pin 11 | OUT3 — Half-bridge 3 output (power) |
| Pin 12 | OUT3 — Half-bridge 3 output (power, paralleled) |
| Pin 13 | OUT4 — Half-bridge 4 output (power) |
| Pin 14 | OUT4 — Half-bridge 4 output (power, paralleled) |
| Pin 15 | GND — Power ground return |
| Pin 16 | VCC — Supply voltage (5.5V to 36V) |
| Pin 17 | VCC — Supply voltage (paralleled) |
| Pin 18 | STATUS — Diagnostic flag output (open-drain) |
| Pin 19 | NC — Not connected (per datasheet) |
| Pin 20 | NC — Not connected (per datasheet) |
| Pin 21 | NC — Not connected (per datasheet) |
| Pin 22 | NC — Not connected (per datasheet) |
| Pin 23 | NC — Not connected (per datasheet) |
| Pin 24 | NC — Not connected (per datasheet) |
| Pin 25 | NC — Not connected (per datasheet) |
| Pin 26 | NC — Not connected (per datasheet) |
| Pin 27 | NC — Not connected (per datasheet) |
| Pin 28 | NC — Not connected (per datasheet) |
Typical Applications
VN771KP-E is suitable for 6 applications: Automotive Body Control Module (BCM), DC Motor Driver (Brushed), Relay and Solenoid Driver Array, LED Lighting Driver (Automotive), HVAC Flap and Blower Actuator, Small Appliance Motor Control.
Automotive Body Control Module (BCM)
The VN771KP-E is purpose-built for automotive body control modules that drive door-lock actuators, mirror fold motors, and lighting relays from a 12 V battery rail. Its 5.5 V to 36 V supply range tolerates cranking transients and load-dump events, while four 95 mOhm half-bridges in a single 28-SO package replace multiple discrete H-bridges, reducing PCB area by up to 60%. The TTL/CMOS logic inputs interface directly with 3.3 V body MCUs such as SPC56 and STM32 families, simplifying firmware. Built-in open-load detection flags broken bulbs or disconnected actuators to the diagnostic STATUS pin, supporting OBD-II compliance for body electronics. Compared with discrete solutions, the VN771KP-E integrates charge pump, UVLO, short-circuit latch, and thermal shutdown - meeting automotive body-electronics reliability targets without external protection circuitry.
Recommended
DC Motor Driver (Brushed)
The VN771KP-E drives small brushed DC motors up to 9 A continuous per channel by configuring two half-bridges as a full H-bridge per motor. Two motors can be controlled simultaneously from a single IC, supporting seat adjusters, window lifters, and HVAC blower modules. The 95 mOhm RDSon minimizes conduction loss at high current, while the integrated charge pump ensures full enhancement of the high-side N-channel MOSFETs even at low battery voltage. Status flag feedback enables stall detection and end-of-travel sensing in window-lifter applications. Compared with relay-based designs, the VN771KP-E enables PWM speed control and soft-start, improving comfort and reducing inrush current on the 12 V bus.
Recommended
Relay and Solenoid Driver Array
The VN771KP-E serves as a multi-channel relay and solenoid driver in industrial control panels, replacing banks of discrete transistors with one 28-SO IC. Each of the four half-bridges can switch 9 A inductive loads up to 36 V, suitable for 24 V solenoid valves, pneumatic relays, and latching contactors. Built-in flyback handling via the MOSFET body diodes (and optional external clamps) protects the IC from inductive kickback. The TTL-compatible inputs accept 3.3 V or 5 V logic from PLCs or industrial MCUs, and the parallel input structure eliminates SPI timing overhead. Open-load detection flags failed solenoids or broken wiring for predictive maintenance in factory automation systems.
Recommended
LED Lighting Driver (Automotive)
The VN771KP-E controls automotive exterior and interior LED lighting including tail lamps, daytime running lights, and ambient interior strips. By PWM-ing the low-side half-bridge at low duty cycles, the IC delivers smooth dimming without flicker while maintaining high efficiency. Its 36 V maximum supply rating handles 24 V truck and bus lighting systems as well as standard 12 V passenger vehicles. The 95 mOhm RDSon reduces thermal stress at high LED currents, and integrated short-circuit protection guards against LED-string failures. Open-load detection in the OFF state identifies burned-out LEDs, supporting the diagnostic requirements of modern automotive lamp modules with minimal external circuitry.
Recommended
HVAC Flap and Blower Actuator
The VN771KP-E drives HVAC blend-door actuators and blower-motor speed controllers in automotive climate control modules. Two half-bridges form a full H-bridge for a single bidirectional actuator, while a third channel PWM-drives the blower fan at variable speed. Operating from a 5.5 V to 36 V supply, the IC handles cranking transients common during engine start without resetting the HVAC module. The STATUS pin reports actuator stall or overcurrent conditions to the HVAC ECU, enabling limp-home mode in case of failure. Compared with discrete FET solutions, the VN771KP-E integrates all four drive channels with protection, saving PCB space inside the HVAC housing.
Recommended
Small Appliance Motor Control
The VN771KP-E is suitable for small appliance motor control in 24 V applications such as coffee machine pumps, vending machine dispensers, and robotic vacuum brush motors. Its 9 A continuous rating handles high-inrush brushed DC motors at startup, while the parallel TTL inputs allow simple GPIO control from low-cost MCUs. The wide 5.5 V to 36 V supply range accommodates both 12 V and 24 V appliance rails without additional regulators. Built-in short-circuit latched shutdown protects the appliance from stall conditions, improving safety and reliability in unattended equipment. Compared with relay-driven appliances, the VN771KP-E enables silent PWM speed control, a key selling point for premium small appliances.
Recommended
Recommended Products Summary
Engineering reference data for VN771KP-E — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | VN771KP | VN771K-E | L9942XPTR | TLE8203-2 | MC33926PNB |
|---|---|---|---|---|---|---|
| Package | 28-SO | 28-SO - same | 28-SO - same | 28-SO - same | 28-SO - same | 28-SO - same |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | Infineon | Infineon | NXP Semiconductors |
| Number of Half-Bridges | 4 | 4 | 4 | 4 | 4 | 2 (dual H-bridge) |
| Continuous Output Current | 9 A per channel | 9 A per channel | 9 A per channel | 0.8 A per channel | 1 A per channel | 5 A per channel |
| RDSon (typ) | 95 mOhm | 95 mOhm | 95 mOhm | 1.5 Ohm | 1.0 Ohm | 235 mOhm |
| Supply Voltage Range | 5.5 V to 36 V | 5.5 V to 36 V | 5.5 V to 36 V | 6 V to 18 V | 4.5 V to 28 V | 5 V to 28 V |
| Control Interface | Parallel TTL/CMOS | Parallel TTL/CMOS | Parallel TTL/CMOS | SPI | SPI | SPI |
| Automotive Grade | Yes (-E suffix) | No (commercial) | Yes | Yes | Yes | Yes |
| Diagnostic STATUS Pin | Yes | Yes | Yes | Yes (SPI-based) | Yes (SPI-based) | Yes (SPI-based) |
Key Differentiators
- Highest continuous current in 28-SO quad half-bridge class (vs L9942XPTR)
- Lower RDSon than SPI-controlled competitors (vs MC33926PNB)
- Parallel TTL inputs eliminate SPI firmware overhead (vs TLE8203-2)
- Wider supply range supports 24V industrial and 36V load-dump (vs L9942XPTR)
Design Notes
At 9 A continuous per channel and 95 mOhm RDSon, each active half-bridge dissipates roughly 7.7 W (9^2 x 0.095). With four channels active simultaneously, total package dissipation can exceed 30 W, requiring substantial PCB copper pour (at least 4 square inches of 2 oz copper on the SO-28 source pins) or an external heatsink. Estimated junction temperature rise using a typical SO-28 theta-JA of 70 C/W is 30 C/W x 30 W = 2100 C, well above the 150 C rating, so realistic designs must reduce duty cycle or use fewer concurrent channels. Always measure under worst-case ambient (85 C underhood automotive).
Place a 100 nF X7R ceramic decoupling capacitor within 5 mm of the VCC pins, supplemented by a low-ESR 47 uF electrolytic bulk capacitor to absorb motor back-EMF. Use wide power traces (at least 0.1 inch / 2.5 mm wide per ampere) for OUTx and GND returns. Connect the digital logic GND to the power GND at a single star point near the IC to avoid digital switching noise coupling into the analog STATUS pin. For high-current brushed DC motors, add 100 nF + 10 uF snubbers across the motor terminals to suppress EMI from commutator arcing.
Do not connect inductive loads without verifying the maximum VCC rating. A 24 V solenoid switched off can produce -30 V flyback spikes that exceed the VN771KP-E's drain-source rating. Add external TVS diodes (e.g., SMBJ33CA) across each OUTx pin if the load is highly inductive. Also note that the STATUS pin is open-drain and requires an external pull-up resistor to VCC (or to the logic supply) - leaving it floating will result in floating diagnostic readings. The short-circuit protection is latched, so a fault requires cycling VCC or the EN pin to recover - do not assume auto-retry.
Compliance Information
RoHS compliant per STMicroelectronics product page. AEC-Q100 qualified for automotive body applications (the -E suffix denotes automotive grade). Halogen-free status not explicitly stated in the Verified Web Data; set to unknown.
