STMicroelectronics L2293Q

Overview

L2293Q from STMicroelectronics is a monolithic high-voltage, high-current push-pull four-channel driver IC designed for driving inductive loads including relays, solenoids, DC motors, and stepping motors. It delivers 600 mA continuous output current per channel, supports 1.2 A non-repetitive peak current, features integrated clamp diodes, dual enable inputs (ENABLE1/ENABLE2), and operates with separate logic (VSS) and power (VS) supplies up to 36 V.

For engineers reviewing the L2293Q datasheet, L2293Q pinout, L2293Q application, or L2293Q equivalent, key selection considerations include per-channel saturation voltage (VCE(sat)H ≤ 1.8 V at –600 mA), switching speed (tr/tf ≤ 250 ns), thermal resistance (Rth(JA) = 42 °C/W on specified PCB), noise-immune input thresholds (VIL ≤ 1.5 V), and VFQFPN-32L 5×5 mm exposed-pad package for thermal management.

Technical Context

The L2293Q implements two independent half-bridge pairs (OUT1/OUT2 + OUT3/OUT4), each controlled by dedicated logic inputs (IN1–IN4) and enable signals (ENABLE1, ENABLE2). Each channel uses complementary bipolar output transistors with integrated clamp diodes for inductive kickback suppression.

It supports dual-supply operation: VS (up to 36 V) powers the output stages, while VSS (2.8–36 V) supplies the TTL/DTL-compatible logic interface. The device includes overtemperature protection and high-noise-immunity inputs with guaranteed low-level recognition up to 1.5 V.

Key Specifications

Pinout & Package

The L2293Q is housed in a VFQFPN-32L 5 mm × 5 mm thermally enhanced no-lead package with an exposed pad (connected to GND) for improved heat dissipation. Pin numbering follows standard top-view orientation with Pin 1 marked by mold feature or corner cut.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad-channel push-pull driver applications.

Compared with ULN2803A and TB6612FNG, the L2293Q uniquely provides four independently controllable push-pull channels with dual enable inputs, separate logic/power rails, and integrated clamp diodes - making it optimal for flexible multi-load switching in space-constrained industrial modules requiring mixed-voltage interoperability.

Availability

L2293Q is available at Aetrix Electronics and suitable for industrial relay control, DC motor H-bridge implementation, and solenoid actuator interfacing requiring stable component supply, long-term lifecycle support, and RoHS-compliant VFQFPN packaging.

Supply support for L2293Q includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

The L2293Q belongs to ST's high-voltage driver product line, engineered specifically for robust, thermally efficient control of inductive loads in factory automation, building management, and motion control systems.

FAQ

What is the maximum operating frequency for PWM control using the L2293Q?

The L2293Q supports reliable switching up to 50 kHz, as confirmed by its AC characteristics: rise/fall times ≤250 ns and turn-on/turn-off delays of 750 ns and 200 ns respectively. This allows clean square-wave generation for motor speed control and solenoid duty-cycle modulation without significant distortion or shoot-through risk.

Can the L2293Q drive a 24 V DC motor in both directions?

Yes - by configuring two adjacent channels (e.g., OUT1/OUT2 and OUT3/OUT4) as two half-bridges and adding external logic (e.g., XOR gates or MCU GPIO), the L2293Q can synthesize a full H-bridge. Its push-pull topology, integrated clamp diodes, and 1.2 A peak current support bidirectional control of 24 V brushed DC motors up to ~15 W mechanical output.

Is external heat sinking required for continuous 600 mA operation per channel?

Yes - at full 600 mA per channel (4 channels active), total power dissipation reaches ~3.6 W. With Rth(JA) = 42 °C/W, junction temperature rise exceeds safe limits without thermal enhancement. The exposed pad must be soldered to ≥0.5 cm² top copper + 6 cm² ground plane with ≥18 thermal vias to maintain TJ < 125 °C at TA = 70 °C.

How should the NC pins and exposed pad be handled in PCB layout?

All NC pins (1, 18–23) and the exposed pad are internally connected to GND per datasheet Figure 2. They must be routed to the system ground plane - the pad requires full-solder coverage and ≥18 thermal vias to inner ground layers. Leaving NC pins floating or disconnecting the pad causes thermal failure and violates ST's recommended layout in Figure 3.