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Diodes Incorporated ZXTC4591AMCQTA
- Part No.:
- ZXTC4591AMCQTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Bipolar Transistor Arrays
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
ZXTC4591AMCQTA.pdf
- Description:
- TRANS NPN/PNP 40V W-DFN3020-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
ZXTC4591AMCQTA from Diodes Incorporated is a complementary dual bipolar transistor pair (NPN+PNP) in a single W-DFN3020-8 Type B package, designed for high-efficiency power switching in space-constrained automotive applications. It delivers ±40V VCEO, ±3A peak pulse current, 500mV/–500mV max VCE(sat) at 1A/–1A, and AEC-Q101 qualification for under-hood DC–DC converters and motor control circuits.
For engineers reviewing the ZXTC4591AMCQTA datasheet, ZXTC4591AMCQTA pinout, ZXTC4591AMCQTA application, or ZXTC4591AMCQTA equivalent, key selection criteria include verified dual-transistor thermal coupling, low RSAT (195mΩ NPN / 350mΩ PNP), AEC-Q101 PPAP capability, and 0.8mm profile suitability for portable and automotive power stages.
Technical Context
This device integrates matched NPN and PNP transistors on a common die substrate with shared thermal path to the exposed collector pads. Its W-DFN3020-8 Type B package enables dual-channel switching with <73.5°C/W RθJA (1oz Cu, 10cm² board) and supports pulsed operation up to 3A per channel with hFE characterized to ±2A.
The complementary topology allows push-pull, H-bridge, and synchronous rectifier configurations without external pairing. Electrical isolation between channels is maintained via separate base-emitter-collector terminals, and saturation voltages are specified under pulsed conditions (≤300µs, ≤2% duty cycle) per Note 12.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | ±40V - Enables use in 24V automotive systems with 2× safety margin against load-dump transients |
| IC (cont.) | ±2A (NPN), ±1.5A (PNP) - Sustained current rating for continuous motor drive or LED backlighting loads |
| VCE(sat) | 500mV max @ 1A (NPN), –500mV max @ –1A (PNP) - Minimizes conduction loss in high-duty-cycle switching |
| RSAT | 195mΩ (NPN), 350mΩ (PNP) - Equivalent on-resistance enabling direct comparison with MOSFET alternatives |
| hFE | 300 min @ ±1mA, 200 min @ ±1A (NPN), 250 min @ ±1A (PNP) - Ensures stable base drive across operating range |
| RθJA | 51.0°C/W (NPN, 1oz Cu, 10cm²) - 40% lower than SOT26, enabling higher power density without forced air |
| Package | W-DFN3020-8 Type B, 3.0×2.0mm, 0.8mm height - Supports ultra-thin PCB designs and automated optical inspection |
Pinout & Package
W-DFN3020-8 Type B is an 8-terminal, bottom-exposed thermal pad package with pin 1 marked by dot on top surface. The exposed collector pads (C1, C2) provide primary thermal path to PCB copper; all terminals are NiPdAu-plated and solderable per MIL-STD-202.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (C1) | NPN Collector | Primary thermal and current path for NPN side; must be connected to large copper pour for RθJL = 17.1°C/W |
| 2 (E1) | NPN Emitter | Reference node for NPN emitter-follower or low-side switch configuration |
| 3 (B1) | NPN Base | Control input for NPN transistor; requires current-limited drive due to hFE-dependent IB |
| 4 (E2) | PNP Emitter | Reference node for PNP high-side switch or complementary emitter-coupled logic |
| 5 (B2) | PNP Base | Inverted control input for PNP; polarity reversal relative to B1 must be accounted for in driver design |
| 6 (C2) | PNP Collector | Primary thermal and current path for PNP side; electrically isolated but thermally coupled to C1 |
| 7, 8 (exposed pad) | Thermal pad / Collector tie | Internally connected to both C1 and C2; mandatory solder connection to PCB ground/power plane for thermal performance |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood operation from –55°C to +150°C junction temperature |
| Low-profile 0.8mm height | Enables integration into <1.2mm total PCB stack-up for compact portable electronics |
| 6mm² footprint | 50% smaller than TSOP6/SOT26, reducing board area while maintaining dual-transistor functionality |
| RθJA 40% lower than SOT26 | Permits 1.5W continuous dissipation on standard FR4 without heatsink in 10cm² layout |
| Halogen & antimony free | Meets JEDEC JS709C and IPC-1752A "Green" requirements (<900ppm Br/Cl, <1000ppm Sb) |
Applications
| Automotive DC–DC Converters | LED Backlighting Drivers |
|---|---|
|
Use Scenario: 12V-to-5V buck converter in infotainment head unit with tight thermal envelope. IC Role / Device Role / Timing Role: NPN/PNP pair operates in synchronous rectification mode to replace Schottky diodes, reducing conduction loss. Use Value: 500mV VCE(sat) cuts forward drop by 45% vs. 900mV Schottky, improving efficiency by ≥2.1% at 2A load. |
Use Scenario: PWM-controlled white LED string (3–4 LEDs) in instrument cluster display. IC Role / Device Role / Timing Role: PNP high-side switch controls LED anode; NPN drives gate of external MOSFET for dimming. Use Value: Matched hFE and VCE(sat) ensure consistent brightness across temperature (–40°C to +85°C ambient). |
| Portable Motor Control | Charging Circuit Power Switch |
|
Use Scenario: Bidirectional brushed DC motor driver in cordless power tool battery pack. IC Role / Device Role / Timing Role: Complementary pair forms half-H-bridge; bases driven by microcontroller GPIO with RC snubbers. Use Value: ±3A peak pulse rating supports 150ms stall current surges without derating; 0.8mm height fits within 3.5mm battery compartment height. |
Use Scenario: Input power path management in USB-C PD fast charger with dual-battery backup. IC Role / Device Role / Timing Role: NPN switches 20V input rail; PNP enables reverse-current blocking during battery discharge mode. Use Value: –40V BVCEO withstands 24V bus transients; 350mΩ PNP RSAT limits blocking loss to <120mW at 200mA reverse leakage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar complementary bipolar transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZXTC2029Z | Single NPN in same W-DFN3020-6 package; no PNP complement; VCEO = 40V, IC = 3A, VCE(sat) = 350mV @ 1A | Requires discrete PNP pairing; lacks integrated thermal coupling and matched hFE tracking | Select when only NPN function needed or when PNP is sourced separately for cost optimization |
| DMT3005LPSQ | Complementary MOSFET pair (N+P) in 2×2mm DFN; RDS(on) = 42mΩ/85mΩ; gate-driven, not current-driven | Eliminates base current requirement but needs level-shifted gate drive; higher capacitance affects >1MHz switching | Select for high-frequency (>500kHz) SMPS where gate drive is available and conduction loss dominates |
Compared with ZXTC2029Z, ZXTC4591AMCQTA saves board space and improves thermal tracking in dual-switch topologies; versus DMT3005LPSQ, it avoids gate-drive complexity and offers superior safe-operating-area robustness at <100kHz switching frequencies.
Availability
ZXTC4591AMCQTA is available at Aetrix Electronics and suitable for automotive power conversion, LED backlighting, portable motor control, and charging circuit applications requiring stable component supply, AEC-Q101 compliance, and long-term lifecycle support.
Supply support for ZXTC4591AMCQTA 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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for automotive, industrial, and consumer markets.
ZXTC4591AMCQTA belongs to Diodes' AEC-Q101-qualified bipolar transistor family, engineered specifically for space-constrained, thermally demanding automotive power stages requiring matched complementary switching characteristics.
FAQ
What is the maximum continuous power dissipation for ZXTC4591AMCQTA on a standard PCB?
The maximum continuous power dissipation is 2.45W for the NPN side and 19.6mW/°C linear derating when mounted on a 31mm × 31mm (10cm²) FR4 board with 1oz copper. This assumes one active die; dual-die operation reduces per-transistor limit to 1.13W (NPN) due to shared thermal resistance.
How are the exposed collector pads (C1 and C2) connected internally?
C1 and C2 are electrically isolated but share a common thermal pad connected to pins 7 and 8. They are not shorted together internally-each serves its respective transistor-and must be independently routed to appropriate voltage rails while maintaining thermal connection to the same copper pour.
Does ZXTC4591AMCQTA support DC motor direction control without external components?
No. While the complementary pair enables H-bridge implementation, full bidirectional control requires four transistors (two ZXTC4591AMCQTA devices or external drivers). This part provides only one half-bridge leg; external base resistors and flyback diodes are mandatory for inductive load commutation.
What is the significance of the '91A' marking on the top surface?
'91A' is the product type marking code per Diodes' ordering information table. It uniquely identifies this device variant (ZXTC4591AMCQTA) and distinguishes it from non-automotive versions like ZXTC4591AMCTA; it has no electrical or functional meaning beyond traceability and reel identification.
ZXTC4591AMCQTA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- 1 NPN, 1 PNP
- Current - Collector (Ic) (Max):
- 2.5A, 2A
- Voltage - Collector Emitter Breakdown (Max):
- 40V
- Vce Saturation (Max) @ Ib, Ic:
- 500mV @ 100mA, 1A
- Current - Collector Cutoff (Max):
- 100nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 300 @ 500mA, 5V / 300 @ 100mA, 5V
- Power - Max:
- 1.5W
- Frequency - Transition:
- 150MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- W-DFN3020-8
ZXTC4591AMCQTA FAQ
1.How can I place an order for ZXTC4591AMCQTA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXTC4591AMCQTA 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 ZXTC4591AMCQTA reliable?
The price and inventory of ZXTC4591AMCQTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXTC4591AMCQTA is usually 5 days.
3.What payment methods are accepted for ZXTC4591AMCQTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXTC4591AMCQTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXTC4591AMCQTA?
ZXTC4591AMCQTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXTC4591AMCQTA 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 ZXTC4591AMCQTA?
For technical support, including ZXTC4591AMCQTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXTC4591AMCQTA requirements.
6.How does Aetrix verify that ZXTC4591AMCQTA is sourced from the original manufacturer or authorized distributors?
All ZXTC4591AMCQTA 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 ZXTC4591AMCQTA meets industry standards.
7.What is the process for return or replacement of ZXTC4591AMCQTA?
All ZXTC4591AMCQTA units undergo pre-shipment inspection (PSI). If there is an issue with ZXTC4591AMCQTA, 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 ZXTC4591AMCQTA part is unused and in its original packaging.
Return procedure for ZXTC4591AMCQTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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