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参数资料
| 型号： | THMC40DR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 运动控制电子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, 1.5 A, PDSO14 |
| 封装： | PLASTIC, SOP-14 |
| 文件页数： | 12/19页 |
| 文件大小： | 300K |
| 代理商： | THMC40DR |
THMC40, THMC41
VARIABLE SPEED 12-VDC BRUSHLESS FAN MOTOR DRIVERS
SLIS097 – MARCH 2000
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
description (continued)
The VOUT duty cycle, and thus the motor speed, is proportional to the voltage present at the VPWM input terminal.
This terminal allows controlling the fan speed via a DAC output from an external control IC or an RC-filtered
PWM output from a PC Super I/O chip.
The THMC40 and THMC41 have an internal Hall sensor amplifier and signal conditioner, global thermal
shutdown, locked rotor protection, and automatic restart after a locked rotor condition. The THMC40 provides
an open-drain tachometer output signal, while the THMC41 provides an open-drain locked rotor detection
output signal. These devices also provide a sleep-state mode to eliminate the need for an external power
component to disconnect the fan from the supply during a system sleep state or
instantly available power down.
The THMC40 and THMC41 are primarily intended for cooling fan applications that require RPM speed control
and the availability of a tachometer or locked rotor detection signal.
functional block diagram
Tachometer
Output
CP
VPWM
Low-Side
Gate Drive
Control Logic
and Global
Thermal
Shutdown
High-Side Gate
Drive With
Synchronous
Rectification
Charge Pump
Locked Rotor
Detection and
Auto Restart
SLEEP
START and
SLEEP
Detection
PWM
Generator
PWM
Oscillator
23 kHz Nominal
PUC and VREF
Thermal
Shutdown
OSC
VSTART
VSLEEP
OSC
PWM
SLEEP
COSC
TACH
(THMC40)
RD
(THMC41)
VPWR
VOUT
PHA
PHB
H+
H–
PGND
AGND
Hall Sensor
Comparator
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相关代理商/技术参数 |
参数描述 |
|---|---|
| THMC40SOPD | 制造商:TI 制造商全称:Texas Instruments 功能描述:VARIABLE SPEED 12-VDC BRUSHLESS FAN MOTOR DRIVERS |
| THMC41 | 制造商:TI 制造商全称:Texas Instruments 功能描述:VARIABLE SPEED 12-VDC BRUSHLESS FAN MOTOR DRIVERS |
| THMC41SOPD | 制造商:TI 制造商全称:Texas Instruments 功能描述:VARIABLE SPEED 12-VDC BRUSHLESS FAN MOTOR DRIVERS |
| THMC45 | 制造商:TI 制造商全称:Texas Instruments 功能描述:5-V AND 3.3-V DC BRUSHLESS FAN MOTOR DRIVER WITH SINGLE WIRE CONTOL |
| THMC50 | 制造商:TI 制造商全称:Texas Instruments 功能描述:REMOTE/LOCAL TEMPERATURE MONITOR AND FAN CONTROLLER WITH SMBus INTERFACE |
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