TMP816

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Current Limit

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TMP816

SLVS787A – MAY 2009 – REVISED JUNE 2015

TMP816 Variable-Speed Single-Phase Full-Wave Fan-Motor Predriver

1

1 Features

•

Predriver for Single-Phase Full-Wave Drive

•

Rotation Speed Detection (FG) and Lock

Detection (RD) Outputs

–

PNP-NMOS is used as an external power TR,

enabling high-efficiency low-consumption drive

2 Applications

by means of the low-saturation output and

single-phase full-wave drive. (PMOS-NMOS

•

Server Fans

also applicable)

•

Appliance Fans

•

External PWM Input Enables Variable-Speed

Control

3 Description

–

Separately-excited upper direct PWM

The TMP816 is a single-phase bipolar variable-speed

fan-motor predriver that works with an external PWM

(f = 25 kHz) control method, enabling highly

signal. A highly efficient, quiet, and low-power

silent speed control

consumption motor driver circuit with a large variable

•

Current Limiter Circuit

speed can be implemented by adding a small number

–

Chopper-type current limit at start

of external components.

•

Reactive Current-Cut Circuit

The TMP816 device is optimal for driving large-scale

–

Reactive current before phase change is cut to

fan motors (with large air volume and large current)

enable silent and low-consumption drive

such as those used in servers and consumer

products.

•

Minimum Speed Setting Pin

–

Minimum speed can be set with external

Device Information(1)

resistor. The start assistance circuit enables

PART NUMBER

PACKAGE

BODY SIZE (NOM)

start at extremely low speed.

TMP816

TSSOP (PW)

4.40 mm × 6.50 mm

•

Constant-Voltage Output Pin for Hall Bias

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

•

Lock Protection and Automatic Reset Functions

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.