TMP815

Vm

Speed Setting

Soft Start

Lock Detection

Speed Output

Frequency Set

Current Limit

H+

H-

Motor

RF

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TMP815

SLDS153B – MAY 2009 – REVISED NOVEMBER 2015

TMP815 Variable-Speed Single-Phase Full-Wave Fan-Motor Predriver

1

1 Features

•

Single-Phase Full-Wave Driving Predriver

•

Rotation Speed Detection (FG) and Lock

Detection (RD) Output

–

Low Saturation Drive Using External P-channel

•

Thermal Shutdown Circuit Incorporated

Devices at Top and N-channel Devices in

Bottom in H-bridge Configuration Enables

2 Applications

High-Efficiency Low-Power Consumption Drive

•

Variable Speed Control Possible With External

•

Server Fans

PWM Input

•

Appliance Fans

–

Separately Excited Upper Direct PWM (f = 30

kHz) Control Method Ensures Quiet Speed

3 Description

Control

The TMP815 device is a single-phase bipolar driving

motor predriver with a variable-speed function that is

•

Current Limiter Circuit Incorporated

compatible with an external PWM signal. A highly

–

Chopper Type Current Limiting Made at Start-

efficient and quiet variable-drive fan motor with low-

up and During Lock

power consumption can be achieved with few

•

Reactive Current Cut Circuit Incorporated

external parts.

–

Reactive Current Before Phase Change Is Cut

This device is best suited for driving of the servers

to Enable Silent and Low-Consumption Drive

requiring large air flow and large current or the fan

•

Minimum-Speed Setting Pin

motors of consumer appliances.

–

Minimum Speed Can be Set With External

Device Information (1)

Resistor

PART NUMBER

PACKAGE

BODY SIZE (NOM)

•

Soft-Start Setting Pin

TMP815

TSSOP (PW)

4.40 mm × 5.00 mm

•

Lock Protection and Automatic Reset Circuits

(1) For all available packages, see the orderable addendum at

Incorporated

the end of the data sheet.

Simplified Schematic

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.