TMP814 Texas instruments

TMP814

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TMP814

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Описание

The TMP814 is a single-phase bipolar variable speed fan motor predriver that works with an external PWM signal. A highly efficient, quiet and low-power consumption motor driver circuit, with a large variable speed, can be implemented by adding a small number of external components. This device is optimal for driving large scale fan motors (with large air volume and large current) such as those used in servers and consumer products.

Predriver for Single-Phase Full-Wave Drive
- PNP-NMOS is Used as an External Power TR,
  Enabling High-Efficiency Low-Consumption
  Drive by Means of the Low-Saturation Output
  and Single-Phase Full-Wave Drive (PMOS-
  NMOS Also Applicable)
External PWM Input Enabling Variable Speed
Control
- Separately-Excited Upper Direct PWM (f = 25
  kHz) Control Method, Enabling Highly Silent
  Speed Control
Compatible with 12-V, 24-V, and 48-V Power
Supplies
Current Limiter Circuit Incorporated
- Chopper Type Current Limit at Start
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. Start Assistance Circuit Enables Start
  at Extremely Low Speed.
Constant-Voltage Output Pin for Hall Bias
Lock Protection and Automatic Reset Functions
Incorporated
FG (Rotation Speed Detection) and RD (Lock
Detection) Output

Rating	Catalog
Architecture	Gate driver
Control topology	Sensored, Trapezoidal
Control interface	1xPWM
Vs (min) (V)	6
Vs ABS (max) (V)	18
Features	Rotor Lock Protection, Tach/FG Feedback
Operating temperature range (°C)	-40 to 85