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JY21L

High-Speed Power MOSFET Driver

The JY21L is a high-speed power mosfet driver from Not specified (project document, not a component datasheet). View the full JY21L datasheet below including key specifications.

JY21L shares its datasheet with JY01, whose page lists every part number it covers.

Official JY21L datasheet (PDF) — the source this page was extracted from.

Manufacturer

Not specified (project document, not a component datasheet)

Category

Motor Drivers

JY21L Key Specifications

ParameterValue
FunctionHigh-speed power MOSFET driver (half-bridge gate driver stage)
Control InputsTwo inputs per IC (PWM and switch signal from MCU: CH1/PA6, CH2/PA7, CH3/PB0 and sw1/PB6, sw2/PC7, sw3/PC1)
Quantity On Board3 ICs driving 6 MOSFETs for a three-phase BLDC motor
Supply Voltage (Driver Boards)Boards available for operation from 3V, 5V and 11V upward

JY21L Overview

Part: JY61P — Not specified (likely a generic BLDC driver board)

Type: BLDC Motor Driver Board (based on context, not a single IC)

Description: A driver board designed for three-phase brushless DC (BLDC) motors, utilizing external Hall sensors or sensorless back-EMF detection, and controlled by an STM32F401RE microcontroller via external MOSFET drivers (JY21L) and a comparator IC (LM339N).

Operating Conditions:

  • Supply voltage: 3V and more (for some boards), 5V and more (for some boards), 11V and more (for some boards)

Absolute Maximum Ratings:

Key Specs:

  • Control method: Hall sensor based or sensorless (back-EMF)
  • Motor type: Three-phase BLDC (e.g., CDROM, HDD motors)
  • Driver ICs: 3x JY21L high speed power MOSFET drivers
  • Comparator IC: LM339N (external)
  • Control signals: 6 MOSFET drive signals (3 PWM, 3 GPIO)
  • Hall sensor input: 3 differential comparator signals
  • PWM frequency: Configurable via Timer 3 (Period = 10000, Prescaler = 1 or 2)
  • UART Baud Rate: 115200

Features:

  • Supports both Hall sensor and sensorless control methods
  • Utilizes external LM339N for Hall sensor signal conditioning or back-EMF zero-crossing detection
  • Drives 6 MOSFETs via 3 JY21L driver ICs
  • Compatible with STM32 NUCLEO-F401RE prototype board
  • Software developed with SW4STM32 and STM32CubeMX
  • External interrupt handling for Hall sensor signals (rising/falling edge)
  • Adjustable PWM for motor speed control

Applications:

  • Three-phase BLDC motor control
  • CDROM motor control
  • HDD motor control

Package:

  • Not applicable (this describes a board, not a single IC package)

JY21L Applications

Since BEMF based on induction and induction needs motion we cannot expect, that the motor starts without any push.

In the following we see some other motors we used together with the same program.

The first one is a hard drive motor and we used this device to conduct an experiment to show the power of an angular momentum.

And here are two different floppy drive motors. A relatively small impulse starts both immediately.

… have fun with STM32! edgarmarx@t-online.de

Variants on the same datasheet

These parts have exact links to the same datasheet. They are candidates to compare, not verified drop-in replacements; check package, pinout and electrical limits.

Part NumberManufacturerPackage
JY01Not specified (project document, not a component datasheet)—
JYQD_V6Not specified (project document, not a component datasheet)—
LM339NNot specified (project document, not a component datasheet)—
STM32F401RET6UNot specified (project document, not a component datasheet)—

Other Motor Drivers

  • DRV8833 – Texas Instruments, Dual H-Bridge Motor Driver
  • DRV8876 – Texas Instruments, H-Bridge Motor Driver
  • TB6612FNG – Toshiba, Driver IC for Dual DC motor
  • A4988 – Allegro MicroSystems, Stepper Motor Driver Module
  • DRV2605YZFR.A – Texas Instruments, Haptic Driver
  • DRV2605YZFT.A – Texas Instruments, Haptic Driver
  • DRV8302 – Texas Instruments, Three-Phase Gate Driver with Dual Shunt Amplifiers and Buck Regulator
  • DRV8302DCA – Texas Instruments, Three-Phase Gate Driver with Dual Shunt Amplifiers and Buck Regulator

All Motor Drivers datasheetsAll Not specified datasheets (5)

Data on this page is extracted from publicly available manufacturer datasheets using automated tools including AI. It may contain errors or omissions. Always verify specifications against the official manufacturer datasheet before making design or purchasing decisions. See our Terms of Service. Rights holders can submit a takedown request.

Ask your AI agent about the JY21L

Connect SheetsData to Claude, Cursor, Codex or any MCP client and your agent reads this datasheet for you: pinout, limits, register maps and design checks, with the numbers taken from the PDF.

claude mcp add --transport http sheetsdata https://mcp.sheetsdata.com/mcp

Then ask: "Can the JY21L run from my 12 V rail? Check it against the datasheet limits."

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