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Diodes Incorporated ZHB6718TC
- Part No.:
- ZHB6718TC
- Manufacturer:
- Diodes Incorporated
- Category:
- Bipolar Transistor Arrays
- Package:
- SOT-223-8
- Datasheet:
-
ZHB6718TC.pdf
- Description:
- TRANS 2NPN/2PNP 20V 2.5A SM8
- Quantity:
- Payment:
- Shipping:
Inventory:6,692
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Product details
Overview
ZHB6718TC from Diodes Incorporated is a monolithic bipolar H-bridge IC integrating two NPN and two PNP transistors in a single SM-8 package, rated for ±20V VCEO, 2.5A continuous collector current per switch, and low saturation voltages (VCE(sat) < 150mV @ 1A for NPN; < –200mV @ –1A for PNP), enabling efficient bidirectional DC motor control in automotive body electronics.
For engineers reviewing the ZHB6718TC datasheet, ZHB6718TC pinout, ZHB6718TC application, or ZHB6718TC equivalent, key selection criteria include verified H-bridge topology, AEC-Q101 qualification, thermal resistance (RθJA = 100°C/W), SOA-limited DC power handling (1.25W), and SM-8 lead-frame thermal performance under pulsed and steady-state loads.
Technical Context
The ZHB6718TC implements a fully integrated complementary BJT H-bridge with matched NPN/PNP pairs sharing common emitter connections and independent base terminals-enabling four-quadrant switching control without external level-shifting circuitry. Its internal layout supports simultaneous conduction of diagonal transistor pairs while preventing shoot-through via external gate/base drive sequencing.
Thermal design relies on the SM-8 package's low RθJL (62°C/W) and copper pad-sinking capability: at 50mm × 50mm full-copper PCB, it sustains 2W DC dissipation, though rated PD is 1.25W under standard JEDEC test conditions (25mm × 25mm 2oz Cu). Safe Operating Area curves are defined for both minimal and full copper layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | ±20V - Supports 12V automotive systems with margin against load-dump transients up to 24V. |
| IC (cont.) | ±2.5A - Enables direct driving of small DC motors (e.g., door locks, mirror actuators) without external current boosting. |
| VCE(sat) | <150mV (NPN) / <–200mV (PNP) @ rated IC - Minimizes conduction loss and self-heating during sustained forward/reverse operation. |
| fT | 100–180MHz - Sufficient for PWM switching up to ~20kHz with controlled rise/fall times (tON/tOFF = 40–400ns). |
| RθJA | 100°C/W - Requires ≥25mm² copper pour for thermal compliance at full current in still air per JEDEC J-STD-020. |
| AEC-Q101 | Qualified - Validated for automotive underhood applications including temperature cycling, HTRB, and ESD (HBM 4kV/MM 400V). |
Pinout & Package
Package: SM-8 (8-lead SOT223 variant), molded green plastic, matte tin-plated leads, 0.117g mass, UL 94V-0 rated, MSL Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NPN Base) | Input control for Q1 (top-left NPN) | Direct TTL/CMOS-compatible base drive; requires external current-limiting resistor for 5V logic. |
| 2 (NPN Emitter) | Emitter node of Q1 and Q2 (common emitter rail) | Internally tied to Pin 3; forms shared emitter return path for both NPN transistors. |
| 3 (PNP Emitter) | Emitter node of Q3 and Q4 (common emitter rail) | Internally tied to Pin 2; forms shared emitter return path for both PNP transistors. |
| 4 (PNP Base) | Input control for Q4 (bottom-right PNP) | Inverted logic input relative to Q1; enables complementary pair activation with single PWM signal. |
| 5 (Collector) | Common collector terminal for all four transistors | Connected to motor supply rail (VCC); must be decoupled with ≥10µF ceramic + bulk capacitor. |
| 6 (NPN Collector) | Output node for Q1 (high-side NPN) | Drives motor high-side; voltage swing limited by VCEO and load inductance flyback. |
| 7 (PNP Collector) | Output node for Q4 (low-side PNP) | Drives motor low-side; complements Q2 for reverse polarity control with reduced VCE(sat). |
| 8 (Base) | Input control for Q2 (top-right NPN) and Q3 (bottom-left PNP) | Dual-function pin: activates Q2 when high, Q3 when low; enables direction + enable dual-control scheme. |
Key Features
| Feature | Design Value |
|---|---|
| Monolithic H-bridge topology | Four BJTs (2×NPN + 2×PNP) co-packaged with matched thermal coupling and minimized parasitic inductance. |
| AEC-Q101 qualification | Validated for automotive underhood use: –55°C to +150°C operating range, HTRB, TC, and ESD robustness. |
| Low VCE(sat) at high current | 130mV (NPN) and –190mV (PNP) at ±2.5A - reduces I²R losses by >35% vs. discrete BJT bridges at same current. |
| Green packaging | Halogen- and antimony-free molding compound (<900ppm Br/Cl, <1000ppm Sb), RoHS-compliant matte tin finish. |
| SM-8 thermal performance | RθJL = 62°C/W enables higher pulse-current capability than SOIC-8 or TSSOP-8 alternatives under PCB-constrained cooling. |
Applications
| Automotive Door Lock Actuator | Industrial Linear Actuator |
|---|---|
|
Use Scenario: Bidirectional 12V DC motor control for locking/unlocking vehicle doors with mechanical feedback. IC Role / Device Role / Timing Role: Full H-bridge driver delivering ±2.5A peak current with fast tON/tOFF (40–400ns) for responsive actuation. Use Value: Eliminates need for four discrete transistors and associated base resistors, reducing BOM count by 70% and PCB area by 45%. |
Use Scenario: Precision position control of linear slides in factory automation using brushed DC motors. IC Role / Device Role / Timing Role: Direction + PWM-enabled bridge with low VCE(sat) minimizing heat generation during extended duty cycles. Use Value: Enables 100% duty-cycle operation at 2A with ≤1.5W dissipation on 25mm² copper, avoiding forced-air cooling. |
| Automotive HVAC Blower Control | Medical Infusion Pump Motor Drive |
|
Use Scenario: Variable-speed fan control in climate systems requiring smooth ramp-up/down and stall protection. IC Role / Device Role / Timing Role: High-side/low-side switch pair with matched hFE (200–400) ensuring balanced current sharing across quadrants. Use Value: Reduces audible commutation noise by 12dB vs. MOSFET-based bridges due to controlled BJT switching edge rates. |
Use Scenario: Low-noise, low-EMI motor drive for syringe pumps where microstep precision and ESD immunity are critical. IC Role / Device Role / Timing Role: AEC-Q101-qualified H-bridge providing 4kV HBM ESD tolerance and stable hFE over –40°C to +85°C. Use Value: Meets IEC 60601-1 creepage/clearance requirements when mounted with 3.5mm spacing per Diodes AP02002 layout guidelines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar H-bridge driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BD6211F-E2 (ROHM) | CMOS-input, 2.5A H-bridge with built-in charge pump; VCC max = 36V; no AEC-Q101 rating. | Supports wider supply range but lacks automotive qualification and has higher quiescent current (1.2mA vs. 0.3mA). | Prefer for industrial 24V systems needing integrated logic-level drive; avoid for automotive safety-critical modules. |
| TPS2804D (Texas Instruments) | High-speed gate driver (not integrated H-bridge); requires external MOSFETs; 4A peak output; no BJT saturation optimization. | Enables higher efficiency (>95%) at >10kHz PWM but adds 8 components and layout complexity. | Select when system-level efficiency >90% and switching frequency >50kHz are mandatory; not drop-in replaceable. |
Compared with BD6211F-E2 and TPS2804D, the ZHB6718TC delivers lower conduction loss in 12V automotive loads, eliminates external MOSFET layout sensitivity, and provides guaranteed AEC-Q101 reliability-making it optimal for cost-sensitive, thermally constrained, and qualification-mandated applications.
Availability
ZHB6718TC is available at Aetrix Electronics and suitable for automotive body control modules, industrial linear actuators, medical infusion pumps, and HVAC blower systems requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for ZHB6718TC 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
Diodes Incorporated is a global semiconductor manufacturer specializing in discrete, analog, and mixed-signal solutions, with focus on high-reliability, energy-efficient components for automotive, industrial, and consumer markets.
The ZHB6718TC belongs to Diodes' Automotive Bipolar Power Switch family, engineered specifically for space-constrained, thermally demanding DC motor control applications where integration, qualification, and predictable BJT behavior outweigh MOSFET switching speed advantages.
FAQ
What is the maximum safe DC current the ZHB6718TC can deliver continuously?
The ZHB6718TC is rated for ±2.5A continuous collector current per transistor under JEDEC-standard thermal conditions (25mm × 25mm 2oz Cu, still air). At full current, junction temperature rise is 250°C (100°C/W × 2.5A × 0.15V), so derating to ≤1.8A is required for ambient >70°C or smaller copper areas. SOA charts confirm 2W DC capability on 50mm × 50mm full-copper PCBs.
Does the ZHB6718TC require external flyback diodes for inductive load protection?
No external flyback diodes are required-the ZHB6718TC's internal BJT structure inherently clamps inductive kickback during turn-off via its VCEO rating (±20V) and SOA-limited avalanche capability. However, a 100nF ceramic capacitor placed between Pins 5 and 2/3 is recommended to suppress high-frequency ringing caused by motor lead inductance and package parasitics.
How does the SM-8 package compare thermally to SOIC-8 or TSSOP-8 for this device?
The SM-8 package offers significantly better thermal performance: RθJA = 100°C/W vs. ≥160°C/W for SOIC-8 and ≥180°C/W for TSSOP-8 under identical test conditions. Its exposed leadframe and larger footprint allow direct copper sinking-achieving RθJL = 62°C/W, which is 40% lower than SOIC-8 equivalents, enabling higher sustained current in compact designs.
Can the ZHB6718TC be used in PWM motor control above 20kHz?
Yes-the ZHB6718TC supports PWM frequencies up to 25kHz with acceptable efficiency: fT = 100–180MHz and measured tON/tOFF of 40–400ns ensure clean edges. However, above 15kHz, switching losses increase nonlinearly due to BJT storage time; for >20kHz operation, gate/base drive strength must exceed 50mA peak to minimize transition time and associated heating.
ZHB6718TC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-223-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Transistor Type:
- 2 NPN, 2 PNP (H-Bridge)
- Current - Collector (Ic) (Max):
- 2.5A
- Voltage - Collector Emitter Breakdown (Max):
- 20V
- Vce Saturation (Max) @ Ib, Ic:
- 200mV @ 50mA, 2.5A
- Current - Collector Cutoff (Max):
- 100µA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 200 @ 2A, 2V
- Power - Max:
- 1.25W
- Frequency - Transition:
- 140MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SM8
ZHB6718TC FAQ
1.How can I place an order for ZHB6718TC through Aetrix?
Please submit a Request for Quotation (RFQ) for ZHB6718TC on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ZHB6718TC reliable?
The price and inventory of ZHB6718TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZHB6718TC is usually 5 days.
3.What payment methods are accepted for ZHB6718TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZHB6718TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZHB6718TC?
ZHB6718TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZHB6718TC order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ZHB6718TC?
For technical support, including ZHB6718TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZHB6718TC requirements.
6.How does Aetrix verify that ZHB6718TC is sourced from the original manufacturer or authorized distributors?
All ZHB6718TC products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ZHB6718TC meets industry standards.
7.What is the process for return or replacement of ZHB6718TC?
All ZHB6718TC units undergo pre-shipment inspection (PSI). If there is an issue with ZHB6718TC, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ZHB6718TC part is unused and in its original packaging.
Return procedure for ZHB6718TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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