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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Motor Drivers, Controllers

Diodes Incorporated AH5772-P-B

Name: AH5772-P-B
Brand: Diodes Incorporated
SKU: AH5772-P-B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AH5772-P-B

Manufacturer:: Diodes Incorporated

Category:: Motor Drivers, Controllers

Package:: 4-SSIP

Datasheet:: AH5772-P-B.pdf

Description:: IC MOTOR DRIVER 2.4V-18V TO94

Quantity:: RFQ Add To RFQ list

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Inventory:1,000

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Product details

Overview

AH5772-P-B from Diodes Incorporated is a single-chip BLDC motor driver with integrated Hall-effect latch sensor, designed for 2.4V–18V single-phase fan/motor control. It integrates a low-R_DS(ON) full-bridge (typ. 1.28 Ω), soft-switching commutation (200 μs), rotor lock detection (420 ms timeout), overvoltage shutdown (21 V threshold), and thermal protection (170 °C trip). Used in 5V/12V cooling fans for notebooks and instrumentation.

For engineers reviewing the AH5772 datasheet, AH5772 pinout, AH5772 application, or AH5772 equivalent, this page delivers verified functional role, TO94 package mapping, Hall sensor magnetic thresholds (B_OP: 5–35 G, B_RP: −35 to −5 G), output drive capability (1 A peak), and real-world protection behaviors including automatic restart after lock clearance.

Technical Context

The AH5772 implements a self-commutating single-phase full-wave drive architecture using an on-die Hall latch with voltage- and temperature-compensated switching points. Its control logic combines dynamic offset cancellation and soft-switch timing to reduce EMI and audible noise during coil current reversal.

Protection functions are tightly coupled: rotor lock detection triggers output shutdown and initiates a fixed 420 ms on-time / variable off-time cycle before auto-restart; overvoltage shutdown enters standby mode at 21 V (±2 V hysteresis); thermal shutdown activates at 170 °C with 25 °C hysteresis.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	2.4 V to 18 V - supports direct interface with common fan rails (5V, 9V, 12V, 15V) without external regulation
Output Current (Peak)	1000 mA - drives medium-power BLDC fans up to ~2.5 W at 12 V with thermal derating
Total R_DS(ON)	1.28 Ω (typ.) - minimizes conduction loss and self-heating in TO94 package at 500 mA load
Hall Operate Point (B_OP)	5–35 G - enables reliable commutation with standard ferrite rotor magnets at air gaps ≤0.5 mm
Soft Switch Time	200 μs (typ.) - reduces dv/dt-induced EMI and acoustic noise vs. hard-switched H-bridges
Overvoltage Threshold	21 V (typ.) - protects motor coil from transient surges on shared supply rails
Thermal Shutdown	170 °C (trip), 25 °C hysteresis - prevents permanent junction damage under sustained overload or poor heatsinking

Pinout & Package

Package: TO94 - industry-standard 4-pin through-hole package with 14.5 mm body length, 5.22 mm width, and 3.65 mm height; designed for manual or wave soldering on 2-layer FR4 PCBs with thermal pad recommendations.

Pin/Terminal	Circuit Role	Design Meaning
1 - VDD	Positive power supply input	Accepts 2.4–18 V DC; internal UVLO and OVP circuitry reference; requires local 0.1–1 μF decoupling
2 - O1	H-bridge output 1	Sourcing/sinking terminal for one side of motor coil; switches with complementary polarity to O2
3 - O2	H-bridge output 2	Sourcing/sinking terminal for opposite side of motor coil; phase relationship with O1 determines rotation direction
4 - GND	Power and signal ground reference	Common return for VDD, Hall sensor, logic, and H-bridge; must be low-impedance path to minimize noise coupling

Key Features

Feature	Design Value
Integrated Hall latch sensor	Eliminates external sensor placement, calibration, and biasing - reduces BOM count and layout sensitivity to magnet alignment
Soft-switching commutation	200 μs transition time limits EMI emissions and audible coil whine, meeting Class B EMC requirements in compact fan assemblies
Rotor lock protection	Detects stalled condition within 420 ms, shuts down outputs, then automatically attempts restart - avoids coil burnout without microcontroller intervention
No external timing capacitor	Enables fully autonomous operation from power-up; removes capacitor aging, tolerance, and temperature drift variables from speed stability
Voltage- and temperature-compensated B_OP/B_RP	Maintains consistent magnetic switch points across −40°C to +105°C and 2.4–18 V - ensures reliable startup and rotation under wide environmental conditions

Applications

Netbook/Notebook Cooling Fans

Desktop PC Chassis Fans

Use Scenario: Fan mounted directly on CPU heatsink or chassis vent, powered from 5V or 12V rail with no speed control interface.

IC Role / Device Role / Timing Role: Self-commutating motor driver with embedded Hall sensing - provides closed-loop rotation without tach feedback or external controller.

Use Value: Reduces system-level component count by integrating sensor, amplifier, logic, and 1 A H-bridge - simplifies thermal management design and improves reliability over discrete solutions.

Use Scenario: 120mm or 140mm chassis fan operating at 12V with variable-speed demand based on ambient temperature.

IC Role / Device Role / Timing Role: Voltage-controlled speed driver - motor RPM scales linearly with VDD (e.g., 12V → 100%, 2.4V → ~20%), enabling simple analog thermal throttling.

Use Value: Enables fan speed modulation without PWM circuitry or MCU firmware - lowers system cost and eliminates EMI from high-frequency switching.

Instrumentation Cooling Fans

Medium-Voltage BLDC Motors

Use Scenario: Low-noise forced-air cooling in medical analyzers or test equipment where acoustic emission must be minimized.

IC Role / Device Role / Timing Role: Low-EMI motor driver with soft-switching - suppresses radiated emissions that could interfere with sensitive analog front-ends or RF modules.

Use Value: Meets EN 55032 Class B conducted/radiated emission limits without added shielding or filtering - accelerates EMC certification.

Use Scenario: 9–15V brushless pump or actuator in industrial control panels requiring stall-safe operation.

IC Role / Device Role / Timing Role: Fault-tolerant motor driver with rotor lock detection and auto-recovery - sustains operation after temporary mechanical obstruction.

Use Value: Prevents coil overheating and system downtime during jam events - eliminates need for external current-sense or watchdog circuitry.

Equivalent & Alternatives

The following parts are listed as comparable options for similar single-phase BLDC fan driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ALLEGRO A3980KLPTR-T	Requires external Hall sensor; higher R_DS(ON) (2.5 Ω typ.); no integrated lock detection	Needs additional sensor placement, biasing, and lock-detection logic - increases layout complexity and failure modes	Choose only if legacy Hall sensor reuse is required or when higher voltage rating (40V) is mandatory
ON SEMICONDUCTOR NCV7703BDR2G	Three-phase driver; no integrated Hall sensor; requires external commutation logic and sensor	Designed for multi-coil motors - unsuitable for single-coil fans without redesigning motor winding and control topology	Select only for new three-phase motor designs where scalability beyond single-phase is needed

Compared with A3980KLPTR-T and NCV7703BDR2G, the AH5772-P-B delivers lower system-level BOM cost and faster time-to-market for single-phase fan applications due to its monolithic integration of Hall sensor, soft-switching logic, and lock-protection - eliminating external components and firmware dependencies.

Availability

AH5772-P-B is available at Aetrix Electronics and suitable for notebook cooling fans, desktop chassis fans, and instrumentation cooling systems requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for AH5772-P-B 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 ICs, specializing in power management, signal integrity, and precision analog solutions for industrial, computing, and consumer markets.

The AH5772 belongs to Diodes' fan motor driver product line, engineered specifically for cost-sensitive, low-noise, single-phase BLDC cooling applications where integration, reliability, and ease of use outweigh programmability requirements.

FAQ

What is the maximum continuous motor current supported by the AH5772-P-B?

The AH5772-P-B supports 500 mA continuous output current at 12 V and +25°C, with peak capability of 1000 mA for short durations. Derating is required above 25°C ambient per the TO94 thermal curve - at +85°C, max continuous current drops to ~300 mA with recommended PCB copper flood. Total R_DS(ON) of 1.28 Ω (typ.) defines conduction loss limits.

How does rotor lock detection work, and what happens after detection?

Rotor lock is detected when the Hall sensor fails to register magnetic transitions for 420 ms (t_ON). The device immediately disables both O1 and O2 outputs, entering a low-power state. After lock removal, it automatically re-enables drive with a controlled ramp-up sequence - no external reset or MCU intervention is needed. This behavior is confirmed in the truth table and timing diagrams of DS35442 Rev. 2–3.

Can the AH5772-P-B drive a motor requiring reverse rotation?

No - the AH5772-P-B is unidirectional by design. Its internal Hall latch and commutation logic are fixed for one rotation direction based on magnet polarity orientation relative to the marking side. Reversal would require physically flipping the magnet or using an external H-bridge controller; the device itself has no direction-control pin or register.

Is the AH5772-P-B still recommended for new designs?

No - Diodes Incorporated explicitly states "THE AH5772 IS NOT RECOMMENDED FOR NEW DESIGNS. PLEASE CONTACT US." This notice appears on page 1 of DS35442 Rev. 2–3. While active inventory remains available for legacy support and repair, Aetrix recommends consulting Diodes for qualified replacements such as the AH5773 or AH5774 series for new projects.

AH5772-P-B Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 4-SSIP

Packaging:: Bulk

Product Status:: Obsolete

Motor Type - Stepper:: -

Motor Type - AC, DC:: Brushless DC (BLDC)

Function:: Driver - Fully Integrated, Control and Power Stage

Output Configuration:: Half Bridge (2)

Interface:: On/Off

Technology:: Power MOSFET

Step Resolution:: -

Applications:: Fan Motor Driver

Current - Output:: 1A

Voltage - Supply:: 2.4V ~ 18V

Voltage - Load:: 2.4V ~ 18V

Operating Temperature:: -40°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-94

AH5772-P-B FAQ

1.How can I place an order for AH5772-P-B through Aetrix?

Please submit a Request for Quotation (RFQ) for AH5772-P-B 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 AH5772-P-B reliable?

The price and inventory of AH5772-P-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH5772-P-B is usually 5 days.

3.What payment methods are accepted for AH5772-P-B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH5772-P-B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AH5772-P-B?

AH5772-P-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AH5772-P-B 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 AH5772-P-B?

For technical support, including AH5772-P-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH5772-P-B requirements.

6.How does Aetrix verify that AH5772-P-B is sourced from the original manufacturer or authorized distributors?

All AH5772-P-B 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 AH5772-P-B meets industry standards.

7.What is the process for return or replacement of AH5772-P-B?

All AH5772-P-B units undergo pre-shipment inspection (PSI). If there is an issue with AH5772-P-B, 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 AH5772-P-B part is unused and in its original packaging.

Return procedure for AH5772-P-B:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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