DZDH0401DW-7 - 40V Ideal Diode Controller SOT-363 | Diodes Inc
Référence : DZDH0401DW-7 ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $1.3 | $1,30 |
| 10 | $1.17 | $11,70 |
| 100 | $1.04 | $104,00 |
| 500 | $0.94 | $470,00 |
| 1 000 | $0.85 | $850,00 |
DZDH0401DW-7 Présentation
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.
Alternatives de remplacement direct pour DZDH0401DW-7 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
DZDH0401DWQ-7
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
DZDH0401DW-7 Valeurs maximales et caractéristiques électriques
| Fonction | 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) |
| Topologie | N+1 ORing / 1:1 OR Controller |
| Boîtier | SOT-363 (SC-70-6) |
| Nombre de broches | 6 |
| Maximum Power Dissipation | 300 mW |
| Plage de température de fonctionnement | -65 C to +150 C |
| Package Dimensions | 2.15 mm x 1.3 mm x 0.95 mm |
| Type de montage | Surface Mount |
| Packaging | Tape and Reel (T&R), 3000 units |
| Statut RoHS | Compliant |
| Application | Power ORing, reverse battery protection, redundant supply feeds |
| External MOSFET | P-channel enhancement MOSFET (user supplied) |
Guide de configuration des broches du DZDH0401DW-7 2.15 mm x 1.3 mm x 0.95 mm
Configuration des broches du DZDH0401DW-7 (boîtier 2.15 mm x 1.3 mm x 0.95 mm). Ce composant de puissance comporte des bornes de grille, de drain et de source. Pour les boîtiers non polarisés, consultez la fiche technique du fabricant pour l'orientation exacte de la broche 1 et les détails de l'empreinte. Les applications courantes incluent la conception d'alimentations, la commande de moteurs et la commutation de charges.
Aucune donnée de brochage détaillée disponible pour DZDH0401DW-7.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
DZDH0401DW-7 convient pour 6 applications: 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour DZDH0401DW-7 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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 |
Principaux différenciateurs
- -50V reverse voltage withstand (vs Generic Schottky ORing diode)
- Ultra-compact 6-pin SOT-363 footprint (vs DZDH0401DWQ-7)
- Standard grade vs automotive variant trade-off (vs DZDH0401DWQ-7)
Notes de conception
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.
Informations de conformité
RoHS compliance per Diodes Incorporated standard product listing (DZDH0401DW family, -7 suffix). Other compliance attributes not stated in the provided web data.
