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TMP814PWR
Fan Motor Pre-Driver 20-TSSOP -40 to 85
TMP814
Speed Setting
Vover
Lock Detection
Limit Vcc(Optional)
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TMP814
TMP814 Variable Speed Single-phase Full-wave Features Predriver for Single-Phase Full-Wave Drive • Lock
Incorporated– PNP-NMOSis Usedasan External Power TR, FG (Rotation Speed Detection) and RD (LockEnabling High-Efficiency Low-Consumption
Detection) OutputDriveby Meansof the Low-Saturation Output
and Single-Phase Full-Wave Drive (PMOS-
ApplicationsNMOS Also Applicable) External PWM Input Enabling Variable Speed • Server Fans (Upto48V)
Control • Appliance Fans (Upto48V) Separately-Excited Upper Direct PWM(f=25
kHz) Control Method, Enabling Highly Silent
3 DescriptionSpeed Control The TMP814isa 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-powerSupplies consumption motor driver circuit, witha large variable• Current Limiter Circuit Incorporated speed, can be implemented by addinga small– Chopper Type Current Limitat Start number Reactive Current Cut Circuit Incorporated This device– Reactive Current Before Phase Changeis Cut motors Enable Silent and Low-Consumption Drive as those Minimum Speed Setting Pin
Device Information(1) Minimum Speed Can Be Set With ExternalResistor. Start Assistance Circuit Enables Startat Extremely Low Speed.
(1) Forall available packages, see the orderable addendumat• Constant-Voltage Output Pin for Hall Bias the endofthe data sheet.
Simplified Schematic
