TC78H660FTG - Dual H-Bridge DMOS Motor Driver, 18V, 2A | Toshiba
料号： TC78H660FTG ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.35 | $1.35 |
| 10 | $1.18 | $11.80 |
| 100 | $0.96 | $96.00 |
| 500 | $0.85 | $425.00 |
| 1,000 | $0.75 | $750.00 |
TC78H660FTG 概述
A brushed DC motor driver is a power-management IC that converts low-power logic-level control signals into the high-current push-pull drive required by a brushed DC motor. Within the broader taxonomy, brushed DC motor drivers sit under motor driver ICs, then power management ICs, then semiconductor devices. The dual H-Bridge topology places four DMOS switches per channel so current can be steered in both directions through the motor winding, enabling forward, reverse, and braking functions from a small surface-mount part.
Key features include 0.6 ohm (typical) on-resistance per DMOS output, integrated Undervoltage Lockout (UVLO), Overcurrent Detection (ISD), and Thermal Shutdown (TSD). A combined MODE/ERR pin lets a host MCU set operating mode in normal operation while the same pin asserts a low-level fault flag when TSD or ISD is triggered. Pulse-width modulation up to 200 kHz is supported for speed control, and logic inputs are 1.8V-compatible for direct connection to modern low-voltage MCUs.
The TC78H660FTG uses Toshiba's proprietary CD-process DMOS transistors, which combine the low conduction loss of DMOS with logic-level gate drive, eliminating the need for external gate-drive circuitry. The exposed thermal pad on the VQFN-16 package lowers thermal resistance to roughly 35 C/W on a 4-layer 1 oz PCB, allowing 2A continuous operation at modest VIN without an external heatsink.
Typical applications include 5V/12V dual brushed DC motors in robotics and small appliances, camera pan/tilt heads, vending-machine actuators, USB-powered fans and pumps, and bipolar stepper motors in compact mechanisms. The 18V absolute maximum supply simplifies 2-cell Li-ion (8.4V) and 12V industrial bus designs.
When designing with this part, place input and motor bypass capacitors within 3 mm of their respective pins, and stitch the exposed thermal pad to a copper ground plane to keep junction temperature within safe limits at full 2A load.
This page synthesizes distributor pricing, verified drop-in alternatives, and PCB-level design notes that go beyond the manufacturer datasheet to help engineers shorten the selection and qualification cycle.
直接替换替代料： TC78H660FTG ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： TC78H660FTG （相同外形与封装尺寸） ——差异在于 Motor Type, Package.
快速对比工具——选择替代料号进行并排对比：
TC78H661FTG
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TC78H660FTG,EL
✅ 直接替换📋 参考替代料（不在目录中）
TC78H660FNG
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
DRV8871
✅ 直接替换📋 参考替代料（不在目录中）
BD6220F
✅ 直接替换📋 参考替代料（不在目录中）
TC78H660FTG 最大额定值与电气特性
| Motor Type | Brushed DC (dual channel) / Bipolar Stepper |
| Number of H-Bridges | 2 |
| Supply Voltage Range | 1.8 V to 18 V |
| Absolute Maximum VM | 20 V |
| Output Current (peak) | 2 A |
| On-Resistance (HS + LS, typ.) | 0.6 ohm |
| PWM Frequency | Up to 200 kHz |
| Logic Input Voltage Levels | 1.8 V compatible |
| Protection Features | UVLO, ISD (Overcurrent), TSD (Thermal Shutdown) |
| Fault Output | MODE/ERR pin (open-drain active-low fault) |
| 封装 | VQFN-16 (3 x 3 mm) with exposed thermal pad |
| 工作温度 | -40 C to +85 C |
| 安装类型 | Surface Mount |
| MSL 等级 | 1 |
| RoHS 状态 | Compliant |
TC78H660FTG 引脚配置
| 引脚 1 | OUT1A — H-Bridge 1 output A |
| 引脚 2 | OUT1B — H-Bridge 1 output B |
| 引脚 3 | IN1A — Logic input 1A (direction control) |
| 引脚 4 | IN1B — Logic input 1B (direction control) |
| 引脚 5 | GND — Ground |
| 引脚 6 | IN2A — Logic input 2A (direction control) |
| 引脚 7 | IN2B — Logic input 2B (direction control) |
| 引脚 8 | OUT2B — H-Bridge 2 output B |
| 引脚 9 | OUT2A — H-Bridge 2 output A |
| 引脚 10 | VM — Motor power supply (1.8V-18V) |
| 引脚 11 | VCC — Internal logic supply (bypass to GND) |
| 引脚 12 | MODE/ERR — Mode control / open-drain error output |
| 引脚 13 | NC — Not connected (per datasheet) |
| 引脚 14 | NC — Not connected (per datasheet) |
| 引脚 15 | NC — Not connected (per datasheet) |
| 引脚 16 | NC — Not connected (per datasheet) |
| 引脚 EP | EP — Exposed thermal pad - connect to GND plane |
典型应用
TC78H660FTG 适用于 6 应用s: USB-Powered Dual DC Brushed Motors, Battery-Powered Robotic Actuators (1S-2S Li-ion), Bipolar Stepper Motor Drive (Full/Half Step), Small Appliance and Vending Actuators, Camera Gimbal and Pan-Tilt Mechanisms, 12V Industrial Brushed Motor Modules.
USB-Powered Dual DC Brushed Motors
The TC78H660FTG drives two small brushed DC motors directly from a 5V USB rail in compact USB-powered peripherals such as desktop fans, camera pan/tilt heads, and miniature robotics. The 1.8V minimum supply and 2A peak output per channel enable direct operation without boost converters. With a logic interface 1.8V-compatible, the TC78H660FTG connects directly to a USB MCU's GPIO pins without level shifters, and integrated UVLO prevents partial-drive MOSFET heating when the USB rail droops under motor stall conditions.
推荐
Battery-Powered Robotic Actuators (1S-2S Li-ion)
The TC78H660FTG is well suited to 1S (3.7V) and 2S (7.4V/8.4V) Li-ion battery-powered robotic actuators where its 1.8V-18V VM range covers the full battery discharge curve plus headroom. At 2A peak per H-Bridge, the part drives small gearmotors used in hobby servos, micro-rover drive wheels, and pan/tilt mechanisms. The exposed thermal pad on the VQFN-16 package keeps junction temperature in safe range even at the higher end of the discharge curve when battery voltage approaches 8.4V and motor current peaks during stall.
推荐
Bipolar Stepper Motor Drive (Full/Half Step)
The TC78H660FTG drives one bipolar stepper motor by tying its two H-Bridges in sequence, delivering up to 2A per phase for small NEMA 14 and NEMA 17 frame sizes. The 18V absolute maximum VM limit covers 12V and 2S Li-ion stepper supplies, ideal for compact CNC accessories, 3D-printer extruder feeders, and automated valve actuators. The MODE/ERR pin allows the host MCU to set the operating mode and receive combined fault feedback, while 200 kHz PWM support enables microstepping waveforms from an external controller.
推荐
Small Appliance and Vending Actuators
The TC78H660FTG drives two brushed DC actuators in small appliances such as coffee dispensers, vending machine selection motors, and ice-maker augers where 12V operation is standard. The 18V maximum supply and integrated protections (UVLO, ISD, TSD) allow the part to ride through motor stall events that occur when mechanisms jam, without damaging the IC. Logic-level 1.8V inputs interface directly to modern appliance MCUs, and the 3x3 mm VQFN-16 footprint enables compact PCB designs inside space-constrained appliance enclosures.
推荐
Camera Gimbal and Pan-Tilt Mechanisms
The TC78H660FTG drives the two brushed DC motors of a small camera gimbal or pan/tilt head, where smooth low-speed torque control is critical. The 0.6 ohm on-resistance minimizes conduction loss and heat dissipation at typical 200-500 mA holding currents, while 200 kHz PWM support allows high-resolution PWM above the audible band to eliminate motor whine. The MODE/ERR pin provides a single-wire fault signal back to the camera's main processor, simplifying wiring in space-constrained gimbal assemblies.
推荐
12V Industrial Brushed Motor Modules
The TC78H660FTG is appropriate for modular 12V brushed motor driver cards used in industrial automation subsystems, where two motors per module simplify wiring. Operating directly from a 12V rail (with 18V headroom for transients), the part eliminates the need for separate high-side gate drivers. Integrated TSD and ISD protect the module from the harsh inrush and stall conditions common on factory floors, while the exposed thermal pad supports continuous 1.5A operation with a 4-layer PCB layout.
推荐
推荐产品汇总
工程参考数据： TC78H660FTG ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | TC78H661FTG | TC78H660FTG,EL | TC78H660FNG | DRV8871 | BD6220F |
|---|---|---|---|---|---|---|
| Brand | Toshiba | Toshiba | Toshiba | Toshiba | Texas Instruments | ROHM Semiconductor |
| Package | VQFN-16 (3x3 mm) | VQFN-16 (3x3 mm) - same | VQFN-16 (3x3 mm) - same | VQFN-16 (3x3 mm) - same | VQFN-16 (3x3 mm) - same outline, different pinout | VQFN-16 (3x3 mm) - same outline, different pinout |
| Supply Voltage Range | 1.8 V to 18 V | 1.8 V to 18 V | 1.8 V to 18 V | 1.8 V to 18 V | 6.5 V to 45 V | 8 V to 18 V |
| Peak Output Current | 2 A | 2 A | 2 A | 2 A | 3.6 A | 2 A |
| Protection Features | UVLO, ISD, TSD | UVLO, ISD, TSD | UVLO, ISD, TSD | UVLO, ISD, TSD | UVLO, OCP, TSD, open-load detect | TSD |
| Logic Input Levels | 1.8 V compatible | 1.8 V compatible | 1.8 V compatible | 1.8 V compatible | 1.8 V compatible | 3 V compatible |
| Pin-Compatible Drop-In | Reference | Yes (same footprint, similar pinout) | Yes (identical) | Yes (same footprint, similar pinout) | No (different pin assignments) | No (different pin assignments) |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C | -40 C to +85 C |
关键差异点
- Lowest minimum supply voltage in its class （对比 DRV8871)
- Compact 3x3 mm VQFN-16 with exposed thermal pad （对比 BD6220F)
- Combined MODE/ERR pin for fault reporting （对比 TC78H660FTG vs discrete H-bridge design)
设计说明
Estimated: at VM=12V, Vmotor=6V, and 1A continuous per channel, each H-Bridge dissipates (12-6)*1 = 6W total, or about 3W per channel. The VQFN-16 (3x3 mm) exposed thermal pad lowers theta_JA to roughly 35 C/W on a 4-layer 1 oz PCB. Place the IC on a copper ground plane at least 25x25 mm, stitch the EP with 9 thermal vias (0.3 mm drill, 1 mm pitch) to inner ground layers, and avoid placing heat-generating components within 5 mm of the IC. A heatsink is not required at 1.5A continuous on a well-designed PCB.
Place a 10uF ceramic VM bypass capacitor within 3 mm of the VM pin (pin 10) and a 0.1uF high-frequency bypass in parallel. Place a 10uF bulk capacitor on each motor output node to suppress inductive kickback at PWM edges. Use wide 0.5 mm traces for motor outputs (OUT1A/B, OUT2A/B) and stitch the EP to a continuous ground pour on top and bottom layers. Keep logic traces (IN1A/B, IN2A/B, MODE/ERR) away from motor traces by at least 3 mm to prevent coupling.
Do not exceed 18V on VM - even brief transients above 20V absolute maximum can permanently damage the DMOS output transistors. Add a TVS diode (e.g., SMAJ18A) across VM to GND for inductive load protection. Do not leave unused logic inputs floating; tie INx pins to a defined logic level to avoid shoot-through. The MODE/ERR pin is open-drain and requires a pull-up resistor (10k to VCC) to read the high-state in normal operation.
Route the two H-Bridge ground returns (pin 5 GND and EP) to a single star point to avoid ground bounce during PWM switching. Keep motor supply traces (VM, OUT1A/B, OUT2A/B) on one PCB layer and logic signals on an adjacent layer with a continuous ground plane between them. This 2-layer stackup minimizes EMI radiation and prevents logic noise coupling into the motor drive path.
合规信息
RoHS compliant per Toshiba product page. Not AEC-Q100 qualified - this part is intended for consumer/industrial use. For automotive brushed DC motor drivers, refer to AEC-Q100-qualified Toshiba parts in the TB67H family.
