UNISONIC TECHNOLOGIES CO., LTD F2967 Preliminary LINEAR INTEGRATED CIRCUIT FOR VARIABLE SPEED FAN MOTOR SINGLE-PHASE FULL-WAVE PRE-DRIVER DESCRIPTION The UTC F2967 is a single-phase fan motor pre-driver IC. This IC has variable speed function that works with an external Pulse-Width Modulation signal. A quiet and low power consumption motor driver circuit can be implemented by adding a small number of external components. This IC is optimal for driving large scale fan motors (with large air volume and large current) such as those used in servers and consumer products. TSSOP-20 FEATURES * Single-phase full-wave drive * Variable speed control with External PWM input * Current limiter circuit * Reactive current cut circuit * Compatible with 12V, 24V, and 48V power supplies * Minimum speed setting pin * Reference voltage output pin for Hall bias * automatic reset and Lock protection functions incorporated * (Rotation speed detection), RD (Lock detection) output ORDERING INFORMATION Ordering Number Lead Free F2967L-P20-T F2967L-P20-R Halogen Free F2967G-P20-T F2967G-P20-R www.unisonic.com.tw Copyright © 2013 Unisonic Technologies Co., Ltd Package Packing TSSOP-20 TSSOP-20 Tube Tape Reel 1 of 9 QW-R109-036.a F2967 Preliminary LINEAR INTEGRATED CIRCUIT PIN CONFIGURATION OUT2P 1 20 OUT1P OUT2N 2 19 OUT1N VCC 3 18 VOVER VLIM 4 17 SGND SENSE 5 RMI 6 VTH 7 14 CT CPWM 8 13 IN+ FG 9 12 HB RD 10 11 IN- UTC F2967 16 6VREG 15 ROFF PIN DESCRIPTION PIN NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 PIN NAME OUT2P OUT2N VCC VLIM SENSE RMI VTH CPWM FG RD INHB IN+ CT ROFF 6VREG SGND VOVER OUT1N OUT1P DESCRIPTION Output2P Output2N Power supply Setting limit current pin Sense pin of current limiter Lowest speed setting voltage Variable speed function input PWM oscillator frequency setting capacitor Speed detection output lock detection output The hall sensor input Power the hall sensor 1.25V The hall sensor input Setting lock protection time The pin sets soft switching time VREF 6V Logic GND The pin for constant VCC voltage Output2P Output2N UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 9 QW-R109-036.a F2967 Preliminary LINEAR INTEGRATED CIRCUIT BLOCK DIAGRAM FG RD Discharge circuit CT Discharge pulse VCC 6VREG OUT1N 6VREG OUT1P ROFF HB Controller Hall-Bias Hysteresis AMP IN+ OUT2N IN- OUT2P Osc OTP RMI VTH CPWM VLIM SENSE UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw SGND 3 of 9 QW-R109-036.a F2967 Preliminary LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATING (TA=25°C) PARAMETER SYMBOL RATINGS UNIT Maximum Supply Voltage VCC VCC max 18 V Maximum Output Current IOUT max 50 mA Output Withstand Voltage VOUT max 18 V HB Maximum Output Current HB 10 mA VTH Input Pin Withstand Voltage VTH max 8 V RD/FG Output Pin Output Withstand Voltage FG max 18 V RD/FG Output Current FG max 10 mA Allowable Power Mounted on a specified board (Note 2) Pd max 800 mW Dissipation Operating Temperature TOPR -30~+95 °C Storage Temperature TSTG -55~+150 °C Notes: 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. 2. Mounted on a specified board (114.3mm×76.1mm×1.6mm, Glass epoxy) RECOMMENDED OPERATING RANGE (TA=25°C) PARAMETER SYMBOL VCC VTH VICM VCC Supply Voltage VTH Input Level Voltage Range Full Speed Mode Hall Input Common Phase Input Voltage Range RATINGS 6~16 0~7 0.2~3 UNIT V V V ELECTRICAL CHARACTERISTICS (TA=25°C, VCC=12V, unless otherwise specified) PARAMETER Circuit Current 6VREG Voltage VOVER Voltage CPWM-H Voltage CPWM-L Voltage CPWM Oscillation Frequency CT Pin H Voltage CT Pin L Voltage ICT Pin Charge Current ICT Pin Discharge Current ICT Charge/Discharge Current Ratio OUT-N Output Voltage OUT-P Sink Current SYMBOL ICC1 ICC2 6VREG VOVER VCRH VCRL FPWM VCTH VCTL ICT1 ICT2 RCT VON IOP Sensitivity of Hall Input VHN RD/FG Output Pin L Voltage RD/FG Output Pin Leak Current VFG IFGL TEST CONDITIONS During Drive During Lock Protection I6VREG=5mA C=100pF IO=20mA Zero Peak Value (Including Offset and Hysteresis) IFG=5mA VFG=16V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN 6 6 5.80 12.0 4.35 1.45 18 3.4 1.4 1.6 0.16 8 4 15 TYP 10 10 6.0 12.8 4.55 1.65 25 3.6 1.6 2.0 0.20 10 10 20 MAX 14 14 6.15 13.6 4.75 1.85 32 3.8 1.8 2.5 0.28 12 UNIT mA mA V V V V kHz V V μA μA deg V mA 10 20 mV 0.15 0.3 30 V μA 4 of 9 QW-R109-036.a F2967 Preliminary LINEAR INTEGRATED CIRCUIT TRUTH TABLE During full-speed rotation ININ+ CT H L L L H H L H L H VTH CPWM L H H L OUT1P OUT1N OUT2P OUT2N L H H L OFF H H OFF INH L H L IN+ L H L H OUT1P L OFF - UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw OUT1N H H FG L OFF L OFF OUT2P L OFF RD L OFF - Mode OUT1→2 drive OUT2→1 drive Lock Protection - OUT2N H H - Mode OUT1→2 drive OUT2→1 drive During Rotation Regeneration in Lower TR 5 of 9 QW-R109-036.a F2967 Preliminary LINEAR INTEGRATED CIRCUIT CONTROL TIMING CHART (1) Minimum speed setting (stop) mode Input of PWM-IN is filtered to generate the VTH voltage. At low speed, the fan rotates with the minimum speed set with RMI pin during low speed. If the minimum speed is not set (RMI=6VREG), the fan stops. (2) Low ⇔ High speed mode PWM control is made through comparison of oscillation and VTH voltages with CPWM changing between 1.6V ⇔ 4.6V. When the VTH voltage is lower, the IC switches to drive mode. When the VTH voltage is higher, the p-channel FET is turned off and coil current is regenerated through the low-side FET. Therefore, as the VTH voltage lowers, the output ON-DUTY increases, increasing the coil current and raising the motor speed. The rotation speed is fed back by the FG output. (3) Full speed mode The full-speed mode becomes effective with the VTH voltage of 1.65V or less. (VTH must be equal to GND when the speed control is not to be made.) (4) PWM-IN input disconnection mode While the input pin of PWM-IN is disconnected, VTH becomes 1.65V or les and the output enables full drive at 100%. The fan runs at full speed. (Refer to the sample application circuit.) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 9 QW-R109-036.a F2967 Preliminary LINEAR INTEGRATED CIRCUIT TYPICAL APPLICATION CIRCUIT 12V Sample Application Circuit CB=to 0.022µF RB=10kΩ VZ=18V ROUT=100Ω SOP8901 RF RFG, RRD=10kΩ~100kΩ VCC VOVER RD FG HALL 6VREG HB SENSE IN- VLIM IN+ 6VREG ROFF RMI R=0~5kΩ OUT1P VTH OUT1N CP=100pF PWM-IN 25kHz OUT2P CPWM OUT2N CT CT=0.47µF UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw SGND 7 of 9 QW-R109-036.a F2967 Preliminary LINEAR INTEGRATED CIRCUIT TYPICAL APPLICATION CIRCUIT(Cont.) 24V, 48V Sample Application Circuit RF VCC VOVER RD FG HB HALL 6VREG SENSE IN- VLIM IN+ 6VREG RMI ROFF OUT1P VTH PWM-IN OUT1N CP=100pF OUT2P CPWM OUT2N CT CT=0.47µF UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw SGND 8 of 9 QW-R109-036.a F2967 Preliminary LINEAR INTEGRATED CIRCUIT UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 9 of 9 QW-R109-036.a