MTD6505 MICROCHIP [Microchip Technology], MTD6505 Datasheet

no-image

MTD6505

Manufacturer Part Number
MTD6505
Description
Sinusoidal Sensorless 3-Phase Brushless DC Fan Motor Driver
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
Features
• 180° Sinusoidal Drive, for high efficiency and low
• Position Sensorless BLDC Drivers
• Integrated Power Transistors
• Supports 2V to 5.5V Power Supplies
• Programming Resistor (R
• Direction Control:
• Speed Control through Power Supply Modulation
• Built-in Frequency Generator (FG Output Signal)
• Built-in Lockup Protection and Automatic
• Built-in Overcurrent Limitation
• Built-in Thermal Shutdown Protection
• Built-in Over Voltage Protection
• No External Tuning Required
• Available Package
Applications
• Notebook CPU Cooling Fans
• 5V 3-Phase BLDC Motors
 2011 Microchip Technology Inc.
Sinusoidal Sensorless 3-Phase Brushless DC Fan Motor Driver
acoustic noise
(No Hall-effect sensor required)
constant (Km) range from 3.25 mV/Hz to
52 mV/Hz
- Forward direction: connect DIR pin to GND or
- Reverse direction: connect DIR pin to V
(PSM) and/or Pulse-Width Modulation (PWM)
Recovery Circuit
10-Lead 3mm x 3mm UDFN
leave floating
or 3V
PROG
) setting to fit motor
BIAS
Description
The MTD6505 device is a 3-phase full-wave
sensorless driver for brushless DC (BLDC) motors. It
features 180° sinusoidal drive, high torque output and
silent drive. With the adaptive features, parameters and
wide range of power supplies (2V to 5.5V), the
MTD6505 is intended to cover a broad range of motor
characteristics, while requiring minimum external
components. Speed control can be achieved through
either power supply modulation (PSM) or pulse-width
modulation (PWM).
The compact packaging and the minimal bill-of-
material make the MTD6505 device extremely cost
efficient in fan applications. For example, the CPU
cooling fans in notebook computers require designs
that provide low acoustic noise, low mechanical
vibration, and are highly efficient. The frequency
generator (FG) output enables precision speed control
in closed-loop applications.
The MTD6505 device includes Lockup Protection
mode to turn off the output current when the motor is in
a lock condition, with an automatic recovery feature to
restart the fan when the lock condition is removed.
Motor overcurrent limitation and thermal shutdown
protection are included for safety enhanced operations.
The MTD6505 is available in a compact, thermally
enhanced, 3mm x 3mm 10-lead UDFN package.
Package Types
*Includes Exposed Thermal Pad (EP); see
R
OUT1
OUT2
V
PROG
BIAS
FG
MTD6505
1
2
3
4
5
3x3 UDFN*
MTD6505
EP
11
10
9
8
7
6
DS22281A-page 1
PWM
DIR
V
OUT3
GND
DD
Table
3-1.

Related parts for MTD6505

MTD6505 Summary of contents

Page 1

... With the adaptive features, parameters and wide range of power supplies (2V to 5.5V), the MTD6505 is intended to cover a broad range of motor characteristics, while requiring minimum external components. Speed control can be achieved through either power supply modulation (PSM) or pulse-width modulation (PWM) ...

Page 2

... MTD6505 Functional Block Diagram CPU + peripherals PWM DIR Non-volatile memory R PROG R sense PROG DS22281A-page 2 V BIAS Thermal protection Overcurrent Adjustable protection OUT3 OUT2 OUT1 GND Short-circuit protection Motor Phase Detection Circuit  2011 Microchip Technology Inc. ...

Page 3

... PROG 2 V BIAS 3 OUT1 4 C2 OUT2 5 Connect as close as possible to IC input pins. Connect as close as possible to IC input pins. Connect to Vlogic on microcontroller side (FG Pull-Up). Select appropriate programming resistor value, see Table 4-2: Km Settings. MTD6505 PWM 10 DIR OUT3 7 GND 6 Comment DS22281A-page 3 ...

Page 4

... MTD6505 NOTES: DS22281A-page 4  2011 Microchip Technology Inc. ...

Page 5

... FG Output Pin Leakage I LH_FG Current Note 1: 750 mA is the standard option for MTD6505. Additional overcurrent protection levels are available upon request. Please contact factory for different overcurrent protection values. 2: Related to the internal oscillator frequency (see  2011 Microchip Technology Inc. † Notice: Stresses above those listed under “Maximum Ratings” ...

Page 6

... Thermal Shutdown T SD_HYS Hysteresis Note 1: 750 mA is the standard option for MTD6505. Additional overcurrent protection levels are available upon request. Please contact factory for different overcurrent protection values. 2: Related to the internal oscillator frequency (see TEMPERATURE SPECIFICATIONS Electrical Specifications: Unless otherwise specified, all limits are established for V ...

Page 7

... FIGURE 2-5: Temperature 5.5 5 4.5 4 3.5 3 2 0.5 0 -40 -25 -10 5 5.0 5.5 FIGURE 2-6: Resistance vs. Temperature. MTD6505 V V VDD = 5.5 VDD = 5.5 VDD = 5.5 VDD = 5.5 = 5. 110 125 Temperature (C°) Inputs (PWM, DIR 5. ...

Page 8

... Temperature (C°) FIGURE 2-8: Supply Current vs. Temperature. 3.0 PIN DESCRIPTIONS The descriptions of the pins are listed in TABLE 3-1: MTD6505 PIN FUNCTION TABLE Pin Type Name Number Motor speed indication output parameter setting with external resistors, see ...

Page 9

... FUNCTIONAL DESCRIPTION The MTD6505 generates a full-wave signal to drive a 3-phase BLDC motor. High efficiency and low-power consumption are achieved due to CMOS transistors and synchronous rectification drive type. 4.1 Speed Control The rotational speed of the motor can be controlled either through the PWM digital input signal or by acting directly on the power supply (V ) ...

Page 10

... To accommodate various motor applications, the MTD6505 provides options to facilitate diverse BEMF coefficients. The MTD6505 defines BEMF coefficient (Km) as the peak value of the phase-to-phase BEMF voltage, normalized to the electrical speed of the motor. The following table offers methods to set the Km value for the MTD6505 device ...

Page 11

... In the event the full Microchip part number cannot be marked on one line, it will be carried over to the next line, thus limiting the number of available characters for customer-specific information.  2011 Microchip Technology Inc. Device Code MTD6505T-E/NA AAAD MTD6505 Example AAAD 1141 256 DS22281A-page 11 ...

Page 12

... MTD6505 DS22281A-page 12  2011 Microchip Technology Inc. ...

Page 13

... Microchip Technology Inc. MTD6505 DS22281A-page 13 ...

Page 14

... MTD6505 NOTES: DS22281A-page 14  2011 Microchip Technology Inc. ...

Page 15

... APPENDIX A: REVISION HISTORY Revision A (November 2011) This is the original release of this document.  2011 Microchip Technology Inc. MTD6505 DS22281A-page 15 ...

Page 16

... MTD6505 NOTES: DS22281A-page 16  2011 Microchip Technology Inc. ...

Page 17

... PRODUCT IDENTIFICATION SYSTEM To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office PART NO Device Tape & Reel Temperature Device: MTD6505T: 3-Phase Brushless DC, Sinusoidal Sensorless Fan Motor Driver (Tape and Reel) Temperature Range Extended -40°C to +125°C Package Plastic Dual Flat, thermally-enhanced, 3x3x0 ...

Page 18

... MTD6505 NOTES: DS22281A-page 18  2011 Microchip Technology Inc. ...

Page 19

Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families ...

Page 20

Worldwide Sales and Service AMERICAS ASIA/PACIFIC Corporate Office Asia Pacific Office 2355 West Chandler Blvd. Suites 3707-14, 37th Floor Chandler, AZ 85224-6199 Tower 6, The Gateway Tel: 480-792-7200 Harbour City, Kowloon Fax: 480-792-7277 Hong Kong Technical Support: Tel: 852-2401-1200 http://www.microchip.com/ ...

Related keywords