TMP815_15 Datasheet, PDF (1/20 Pages) Texas Instruments – Variable-Speed Single-Phase Full-Wave Fan-Motor Predriver

Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
TMP815
SLDS153B – MAY 2009 – REVISED NOVEMBER 2015
TMP815 Variable-Speed Single-Phase Full-Wave Fan-Motor Predriver
1 Features
• Single-Phase Full-Wave Driving Predriver
– Low Saturation Drive Using External P-channel
Devices at Top and N-channel Devices in
Bottom in H-bridge Configuration Enables
High-Efficiency Low-Power Consumption Drive
• Variable Speed Control Possible With External
PWM Input
– Separately Excited Upper Direct PWM (f = 30
kHz) Control Method Ensures Quiet Speed
Control
• Current Limiter Circuit Incorporated
– Chopper Type Current Limiting Made at Start-
up and During Lock
• Reactive Current Cut Circuit Incorporated
– Reactive Current Before Phase Change Is Cut
to Enable Silent and Low-Consumption Drive
• Minimum-Speed Setting Pin
– Minimum Speed Can be Set With External
Resistor
• Soft-Start Setting Pin
• Lock Protection and Automatic Reset Circuits
Incorporated
1
• Rotation Speed Detection (FG) and Lock
Detection (RD) Output
• Thermal Shutdown Circuit Incorporated
2 Applications
• Server Fans
• Appliance Fans
3 Description
The TMP815 device is a single-phase bipolar driving
motor predriver with a variable-speed function that is
compatible with an external PWM signal. A highly
efficient and quiet variable-drive fan motor with low-
power consumption can be achieved with few
external parts.
This device is best suited for driving of the servers
requiring large air flow and large current or the fan
motors of consumer appliances.
Device Information ⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TMP815
TSSOP (PW)
4.40 mm × 5.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
Vm
Speed Setting
H+
Soft Start
H-
Lock Detection
Frequency Set
TMP815
Current Limit
Speed Output
Motor
RF
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.