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TMP814 Datasheet(PDF) 1 Page - Texas Instruments |
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TMP814 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 21 page TMP814 Vm Speed Setting Vover Lock Detection Speed Output Frequency Set Current Limit H+ H- RF Limit Vcc (Optional) Product Folder Sample & Buy Technical Documents Tools & Software Support & Community TMP814 SLDS151A – MAY 2009 – REVISED JUNE 2015 TMP814 Variable Speed Single-phase Full-wave Fan Motor Predriver 1 1 Features • Predriver for Single-Phase Full-Wave Drive • Lock Protection and Automatic Reset Functions Incorporated – PNP-NMOS is Used as an External Power TR, • FG (Rotation Speed Detection) and RD (Lock Enabling High-Efficiency Low-Consumption Detection) Output Drive by Means of the Low-Saturation Output and Single-Phase Full-Wave Drive (PMOS- 2 Applications NMOS Also Applicable) • External PWM Input Enabling Variable Speed • Server Fans (Up to 48 V) Control • Appliance Fans (Up to 48 V) – Separately-Excited Upper Direct PWM (f = 25 kHz) Control Method, Enabling Highly Silent 3 Description Speed Control The TMP814 is a single-phase bipolar variable speed fan motor predriver that works with an external PWM • Compatible with 12-V, 24-V, and 48-V Power signal. A highly efficient, quiet and low-power Supplies consumption motor driver circuit, with a large variable • Current Limiter Circuit Incorporated speed, can be implemented by adding a small – Chopper Type Current Limit at Start number of external components. • Reactive Current Cut Circuit Incorporated This device is optimal for driving large scale fan – Reactive Current Before Phase Change is Cut motors (with large air volume and large current) such to Enable Silent and Low-Consumption Drive as those used in servers and consumer products. • Minimum Speed Setting Pin Device Information(1) – Minimum Speed Can Be Set With External PART NUMBER PACKAGE BODY SIZE (NOM) Resistor. Start Assistance Circuit Enables Start TMP814 TSSOP (PW) 4.40 mm x 6.50 mm at Extremely Low Speed. (1) For all available packages, see the orderable addendum at • Constant-Voltage Output Pin for Hall Bias 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. |
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