28BYJ-48 Datasheet – Stepper Motor

This post explains for the semiconductor 28BYJ-48.

The most commonly used stepper motor is the 28-BYJ48 Stepper Motor.

The Part Number is 28BYJ-48.

The function of this semiconductor is 5V Stepper Motor.

Manufacturers : Kiatronics

Preview images :

28BYJ-48 Datasheet


Description :

The is 5V Stepper Motor.

The 28BYJ-48 is a small stepper motor suitable for a large range of applications.


1. Rated voltage : 5VDC
2.Number of Phase : 4
3. Speed Variation Ratio : 1/64
4 Stride Angle : 5.625° /64
5. Frequency : 100Hz
6. DC resistance : 50Ω±7%(25℃)
7. Idle In-traction Frequency : > 600Hz
8. Idle Out-traction Frequency : > 1000Hz
9. In-traction Torque : >34.3mN.m(120Hz)
10. Self-positioning Torque : >34.3mN.m
11. Friction torque : 600-1200 gf.cm
12. Pull in torque : 300 gf.cm
13. Insulated resistance : >10MΩ(500V)
14. Insulated electricity power : 600VAC/1mA/1s
15. Insulation grade : A
16. Rise in Temperature : <40K(120Hz)
17. Noise : <35dB(120Hz,No load,10cm)

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28BYJ-48 image

Company Information

Cherrywood Tauranga New Zealand Phone: ++64 7 578 7739 Fax: ++64 7 578 7749 E-mail: enquiry@kiatronics.com Website: www.kiatronics.com Copyright  Welten Holdings Ltd – Specifications subject to change without further notice. […]


1. CNC machines
2. Precise control machines
3. Security cameras
4. DVD Players
5. Car side mirror tilt

28BYJ-48 Datasheet


RT9214 Datasheet – Synchronous Buck PWM DC-DC Controller

Part Number : RT9214

Function : 5V/12V Synchronous Buck PWM DC-DC Controller

Manufactures : Richtek Technology

Image :  RT9214 Image

General  Descript ion

The RT9214 is a high efficiency synchronous buck PWM controllers that generate logic-supply voltages in PC based systems. These high performance , single output devices include internal soft -start, frequency compensation networks and integrates al   of  the control ,  output adjustment, monitoring and protection functions into a single package.
The device operating at fixed 300kHz frequency provides an optimum compromise between efficiency, external component size, and cost. Adjustable over-current protect ion (OCP) monitors the voltage drop across theRDS(ON) of  the lower MOSFET for synchronous buck PWM DC/DC controller.  The over current  function cycles the soft-start in 4-times hiccup mode to provide fault protection, and in an always hiccup mode for under-voltage protection.

Pinout :

RT9214 Pinout

Official Homepage : http://www.richtek.com/en/Products/Switching%20Regulators/Single-Phase%20Step-Down%20Controller/RT9214


1. Operating with 5V or 12V Supply Voltage
2. Drives All Low Cost N-MOSFETs
3. Voltage Mode PWM Control
4. 300kHz Fixed Frequency Oscillator
5. Fast Transient Response:
– High-Speed GM Amplifier
– Full 0 to 100% Duty Ratio
6. Internal Soft-Start
7. Adaptive Non-Overlapping Gate Driver
8. Over Current Fault Monitor on MOSFET, No Current Sense Resistor Required
9. RoHS Compliant and 100% Lead (Pb)-Free

RT9214 Circuit

RT9214 Datasheet

RT9214 Datasheet