DZDH0401DW-7 - 40V Ideal Diode Controller SOT-363 | Diodes Inc
MPN: DZDH0401DW-7 ✓ Hoạt độngDZDH0401DW-7 Tóm tắt
An ideal diode controller is a power management IC that replaces a conventional rectifier diode with a MOSFET-based switch, eliminating the fixed ~0.7V forward voltage drop of silicon diodes. In the power management hierarchy, it sits between power sources and loads, enabling ORing of supplies, battery feeding, and reverse-polarity protection with millivolt-level forward losses instead of diode drops, greatly improving power efficiency in low-voltage, high-current rails.
Key features include the internal differential amplifier and P-MOS gate controller that compare IN and OUT voltages; when the forward differential exceeds approximately 34mV (typical), the gate drive turns the MOSFET fully on to minimize conduction losses. When VIN falls below VOUT, the controller rapidly pulls the gate high to block reverse current, providing high isolation and reverse discharge protection. The -50V negative rating makes it suitable for input protection against reverse-battery and inductive kickback events.
Technically, the DZDH0401DW operates as a precision comparator plus gate driver loop: forward mode regulates the MOSFET to behave like a low-loss diode, while reverse mode turns the P-channel MOSFET off. A VBIAS pin supports local biasing of the MOSFET gate. Maximum power dissipation is 300mW, adequate for the controller itself since power is handled by the external MOSFET.
Typical applications include N+1 redundant power supply ORing, battery-backup feeds in industrial and telecom equipment, reverse-battery protection in automotive and portable devices, solar-panel blocking diodes, and high-side power-path management.
Design tip: select a P-channel MOSFET whose VGS(max) exceeds the worst-case supply differential and keep the IN-OUT sense traces short for fast reverse-current shutdown.
This page synthesizes distributor pricing, stock data, and engineering design notes not found in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho DZDH0401DW-7 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
DZDH0401DWQ-7
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
DZDH0401DW-7 Tỷ lệ tối đa & tính chất điện
| Chức năng | Ideal Diode Controller (drives external P-channel MOSFET) |
| Operating Voltage Range | 0 V to 40 V |
| Reverse Voltage Protection | -50 V |
| Forward Regulation Threshold | ~34 mV (typ) |
| Cấu trúc | N+1 ORing / 1:1 OR Controller |
| Hộp | SOT-363 (SC-70-6) |
| Số chân | 6 |
| Maximum Power Dissipation | 300 mW |
| Khoảng nhiệt độ hoạt động | -65 C to +150 C |
| Package Dimensions | 2.15 mm x 1.3 mm x 0.95 mm |
| Kiểu lắp đặt | Surface Mount |
| Packaging | Tape and Reel (T&R), 3000 units |
| Trạng thái RoHS | Compliant |
| Application | Power ORing, reverse battery protection, redundant supply feeds |
| External MOSFET | P-channel enhancement MOSFET (user supplied) |
Hướng dẫn cấu hình chân DZDH0401DW-7 2.15 mm x 1.3 mm x 0.95 mm
Cấu hình chân cho DZDH0401DW-7 (2.15 mm x 1.3 mm x 0.95 mm gói). Động cơ điện này có chân cổng, nguồn và đầu ra. Đối với các gói không phân極, tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết hướng dẫn chính xác của chân 1 và chi tiết về vân footprint. Các ứng dụng phổ biến bao gồm thiết kế nguồn cung cấp điện, điều khiển động cơ và chuyển đổi tải.
Không có dữ liệu chân cụ thể sẵn có cho DZDH0401DW-7.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
DZDH0401DW-7 phù hợp cho 6 Áp dụngs: N+1 Redundant Power Supply ORing, Reverse Battery Protection, Battery Backup / UPS Power Feeds, Solar Panel Blocking Diode Replacement, Industrial PLC and Control Cabinet Power Paths, Portable and Wearable Device Power Switching.
N+1 Redundant Power Supply ORing
In server, telecom, and industrial racks with N+1 redundant power supplies, each supply output feeds a common bus through an ideal diode built from the DZDH0401DW-7 and a P-channel MOSFET. The controller's ~34mV typical forward regulation keeps conduction loss far below a Schottky diode's 0.3-0.5V drop, so at 5A the MOSFET solution wastes under 0.2W instead of 2W or more. When one supply fails or its voltage sags, the controller turns its MOSFET off within microseconds, isolating the faulted rail and letting the healthy supplies carry the load. The 0V-40V range covers common 12V, 24V, and 28V bus architectures.
Được đề xuất
Reverse Battery Protection
Portable, automotive, and industrial devices exposed to battery mis-insertion or reversed wiring benefit from the DZDH0401DW-7's -50V reverse voltage rating. Placed in series with the battery input driving a P-channel MOSFET, the controller passes power normally at ~34mV forward drop during correct polarity, then blocks reverse current when input polarity flips. Unlike a conventional series diode that dissipates P = I x 0.7V continuously, the MOSFET solution keeps losses negligible, extending battery runtime and eliminating heatsinks. The -65C to +150C operating range handles engine-bay and outdoor industrial environments where reverse-connection faults occur in the field.
Được đề xuất
Battery Backup / UPS Power Feeds
Battery-backup feeds in security panels, meters, and small UPS systems use the DZDH0401DW-7 to seamlessly OR a battery with a mains-derived supply. The controller's fast comparator loop senses the IN-OUT differential and blocks reverse discharge the instant the main supply collapses, preventing the battery from feeding back into a failed charger - the reverse discharge protection described in the Diodes Incorporated datasheet. The 34mV typical forward drop maximizes usable battery capacity on 12V and 24V sealed-lead-acid or LiFePO4 stacks. The tiny SOT-363 (2.15mm x 1.3mm) footprint suits compact controller boards where a power diode's thermal pad would not fit.
Được đề xuất
Solar Panel Blocking Diode Replacement
In solar harvesting circuits for IoT gateways, street lights, and remote sensors, a blocking diode prevents nighttime battery discharge into the panel. Replacing that diode with a DZDH0401DW-7 plus P-channel MOSFET recovers the panel's diode drop: at 2A, a Schottky wastes about 0.8W while the ideal diode wastes roughly 68mW at the ~34mV typical threshold. The 40V maximum input covers typical 12V and 24V panel open-circuit voltages with margin, and the -65C to +150C range tolerates rooftop thermal swings. The SOT-363's small footprint eases integration into MPPT or charge-controller PCBs.
Được đề xuất
Industrial PLC and Control Cabinet Power Paths
Programmable logic controllers and control cabinets often merge a 24V DIN-rail supply with a backup or secondary feed. The DZDH0401DW-7's 0V to 40V operating range directly covers 24V industrial buses with transient margin, and its ideal diode action avoids the 1.5-2W per rail dissipation of series Schottky diodes at multi-amp loads, reducing cabinet heat. Its differential-amplifier gate control regulates the MOSFET smoothly during supply switchover, minimizing bus disturbance to sensitive I/O modules. The 3,000-piece tape and reel suits volume industrial builds, and the -65C to +150C rating covers unconditioned cabinet environments.
Được đề xuất
Portable and Wearable Device Power Switching
Handheld instruments, wearable electronics, and portable test gear juggle USB, battery, and adapter inputs. The DZDH0401DW-7's SOT-363 package (2.15mm x 1.3mm x 0.95mm, 6 pins) fits dense power-path layouts, ORing sources with ~34mV typical forward loss - critical for battery runtime versus a 0.4V Schottky drop that can consume several percent of a 3.7V cell voltage. Its 300mW dissipation rating is sufficient since load current passes through the external MOSFET, not the controller. Fast reverse-current blocking prevents adapter unplug glitches from back-feeding the battery rail, a common failure mode in dual-source portable designs.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho DZDH0401DW-7 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | DZDH0401DWQ-7 |
|---|---|---|
| Package | SOT-363 (SC-70-6) | SOT-363 (SC-70-6) - same |
| Brand | Diodes Incorporated | Diodes Incorporated |
| Operating Voltage Range | 0 V to 40 V | 0 V to 40 V |
| Forward Threshold | ~34 mV (typ) | ~34 mV (typ) |
| Qualification Grade | Standard (commercial/industrial) | Automotive qualified |
Bảo phân biệt quan trọng
- -50V reverse voltage withstand (vsGeneric Schottky ORing diode)
- Ultra-compact 6-pin SOT-363 footprint (vsDZDH0401DWQ-7)
- Standard grade vs automotive variant trade-off (vsDZDH0401DWQ-7)
Ghi chú thiết kế
Select the external P-channel MOSFET so that its VGS(max) rating exceeds the worst-case IN-to-OUT differential at turn-off; the DZDH0401DW-7 drives the gate between IN and the MOSFET source, so gate-source stress is bounded by the supply swing. Also ensure the MOSFET's continuous drain current comfortably exceeds your load with derating, since the controller itself dissipates almost nothing (300mW limit applies to the SOT-363 controller die). Verify VBIAS pin connection per the datasheet application schematic - an incorrect bias network is the most common bring-up failure.
Keep the IN and OUT sense traces short and route them directly to the MOSFET drain and source pads rather than sharing high-current copper runs, so the comparator sees the true MOSFET terminal voltages without IR-drop error. Place a small ceramic bypass capacitor (typically 0.1uF to 1uF, per the datasheet typical application) close to the IC. Provide a solid ground return for the controller; noisy grounds can cause chatter near the 34mV regulation threshold.
Estimated: for a 24V ORing rail at 5A through a P-MOSFET with 20mOhm RDS(on), forward drop is I x RDS(on) = 0.1V and MOSFET dissipation is 0.5W - far better than a Schottky diode at roughly 2.5W. The DZDH0401DW-7 controller dissipates only milliwatts in the SOT-363, so thermal design effort should focus on the external MOSFET and its copper pour, not the controller. Confirm transient load currents stay within the MOSFET's SOA.
Thông tin tuân thủ
RoHS compliance per Diodes Incorporated standard product listing (DZDH0401DW family, -7 suffix). Other compliance attributes not stated in the provided web data.
