Toshiba Semiconductor and Storage TB62215AFG,C8,EL

Overview

TB62215AFG,C8,EL from Toshiba is a clock-in controlled bipolar stepping motor driver IC using PWM chopper current control, supporting full/half/quarter-step operation with 40 V/3.0 A rating and 0.6 Ω (typ.) total output ON-resistance. It integrates thermal shutdown (TSD), over-current shutdown (ISD), power-on reset (POR), and an internal VCC regulator - deployed in industrial automation motion control systems requiring precise open-loop positioning.

For engineers reviewing the TB62215AFG,C8,EL datasheet, TB62215AFG,C8,EL pinout, TB62215AFG,C8,EL application, or TB62215AFG,C8,EL equivalent, key selection considerations include its HSOP28 package thermal performance, 10–38 V motor supply range, 100 kHz chopper frequency capability, step resolution control via DMODE1/DMODE2, and integrated current sense architecture with external VREF tuning.

Technical Context

The TB62215AFG,C8,EL implements a two-phase bipolar stepper driver with built-in clock decoder and mixed-decay PWM chopper control. Its BiCD monolithic process enables high-voltage (40 V) and high-current (3.0 A) capability while integrating TSD, ISD, and POR protection circuits.

Step resolution is selected via DMODE1/DMODE2 logic inputs (full/half/quarter/standby), and chopping frequency is set externally via OSCM pin (1.2–2.0 MHz oscillator, yielding ~75–125 kHz chopper). Current regulation uses dual-channel VREFA/VREFB references with 1/5.0 (typ.) gain and external sense resistors (RSA/RSB).

Key Specifications

Pinout & Package

Package: HSOP28-P-0450-0.80 - 28-pin heat-sink exposed pad package (0.79 g typ.), requiring PCB GND connection to FIN pin (Pin 8 & 22) for thermal management.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bipolar stepping motor driver applications.

Compared with STSPIN820 and MP6500, the TB62215AFG,C8,EL offers superior configurability (step mode, chopper freq, dual VREF), robust thermal design (exposed pad), and real-time angle monitoring - making it preferred for industrial motion systems demanding reliability and diagnostics.

Availability

TB62215AFG,C8,EL is available at Aetrix Electronics and suitable for industrial CNC positioning, medical infusion pump drive, automated optical inspection, and print head carriage control requiring stable component supply and long-term production continuity.

Supply support for TB62215AFG,C8,EL 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

Toshiba Electronic Devices & Storage Corporation designs high-reliability analog and power ICs for industrial, automotive, and consumer applications, with decades of expertise in BiCD process technology.

The TB62215AFG,C8,EL belongs to Toshiba's stepper motor driver product line, engineered specifically for cost-sensitive yet thermally demanding open-loop motion control in factory automation and precision equipment.

FAQ

What is the maximum continuous motor current supported by the TB62215AFG,C8,EL under standard PCB conditions?

The TB62215AFG,C8,EL has an absolute maximum output current rating of 3.0 A, but continuous operation is thermally limited. With the HSOP28 package mounted to a 4-layer PCB with 20 cm² GND copper area, the practical continuous current is 2.1 A at T_A = 70 °C to maintain junction temperature ≤120 °C. This aligns with the 70% derating guideline in the datasheet Note 1. Exceeding this requires forced air or heatsinking. The TB62215AFG,C8,EL datasheet specifies IM3 current draw of 5.0–7.0 mA in full-step mode, confirming low logic overhead.

How does the MO pin function in the TB62215AFG,C8,EL, and what external circuitry is required?

The MO (motor angle monitor) pin on the TB62215AFG,C8,EL is an open-drain digital output that reflects the motor's electrical angle position - toggling at defined intervals per step resolution (e.g., every full step in full-step mode). It requires an external pull-up resistor (10–100 kΩ) to VCC or MCU I/O voltage. The MO signal enables stall detection, closed-loop hybrid control, or synchronization with external systems. Its VOL is specified at ≤0.5 V @ 24 mA, ensuring clean logic-level compatibility. This functionality is unique to the TB62215AFG,C8,EL among comparable drivers and is documented in Section 13 of the datasheet.

Can the TB62215AFG,C8,EL operate with a 3.3 V logic supply, and are level shifters needed?

Yes, the TB62215AFG,C8,EL supports 3.3 V logic interfaces directly. Its input thresholds are V_IN(H) ≥2.0 V and V_IN(L) ≤0.8 V, fully compatible with 3.3 V CMOS outputs. No level shifters are required for CLK, ENABLE, RESET, CW/CCW, or DMODE pins. The MO output also swings rail-to-rail when pulled up to 3.3 V. However, VCC must still be supplied at 4.75–5.25 V (internally regulated) and cannot be replaced by 3.3 V - the TB62215AFG,C8,EL relies on its internal VCC regulator for core logic stability.

What is the purpose of the FIN pin on the TB62215AFG,C8,EL, and how must it be connected?

The FIN pin (Pins 8 and 22) on the TB62215AFG,C8,EL is the exposed thermal pad of the HSOP28 package and must be soldered directly to a large, low-thermal-resistance PCB GND copper area. It serves as the primary heat dissipation path - critical for handling up to 1.15 W of power dissipation. Per datasheet Note and Layout Guideline, the FIN pad must be connected exclusively to GND (not floating or tied to other nets) and should occupy ≥4 cm² of inner-layer GND planes with multiple thermal vias. Incorrect FIN connection causes rapid Tj exceedance and thermal shutdown (TSD) activation, degrading TB62215AFG,C8,EL reliability.

How is the chopper frequency set on the TB62215AFG,C8,EL, and what is the recommended range?

The chopper frequency on the TB62215AFG,C8,EL is set via an external RC network on the OSCM pin (Pin 28), which controls an internal oscillator. The formula is f_OSCM ≈ 1/[0.56 × C × (R + 500)], with f_chop = f_OSCM/16. Using 270 pF and 3.6 kΩ yields 1.6 MHz OSCM → 100 kHz chopper. Datasheet Section 18 recommends 50–100 kHz for optimal trade-off: lower frequencies reduce switching loss but increase current ripple; higher frequencies improve waveform fidelity but raise die temperature. The TB62215AFG,C8,EL's specified f_chop range is 40–150 kHz, validated across operating conditions.