F6908

F6908 UTC | Alldatasheet

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UNISONIC TECHNOLOGIES CO., F6908 LINEAR INTEGRATED CIRCUIT www.unisonic.com.tw 1 Copyright © 2005 Unisonic Technologies Co., QW-R109-016.B SINGLE-PHASE FULL-WAVE MOTOR DRIVER FOR FAN MOTOR „ DESCRIPTION UTC F6908 is a single-phase full-wave motor driver for fan motor suitable for 5V and 12V openations. „ FEATURES * Soft switching drive for low noise * Lock detection and automatic restart function * Thermal shut-down protection SOP-8 *Pb-free plating product number: F6908L „ PIN DESCRIPTION PIN NO. PIN NAME FUNCTION

1 OUT2 Output 2

2 HO Hall signal output pin

3 LD Capacitor terminal for Lock

detection, Auto restart

4 V CC Power supply pin

5 H+ Hall signal input pin +

6 H- Hall signal input pin -

7 OUT1 Output 1

8 GND GROUND

„ ORDERING INFORMATION Order Number Normal Lead Free Plating Package Packing F6908-S08-R F6908L-S08-R SOP-8 Tape Reel F6908-S08-T F6908L-S08-T SOP-8 Tube

F6908 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 2 www.unisonic.com.tw Q W - R 1 0 9 - 0 1 6 . B „ BLOCK DIAGRAM - + HALL AMPTSD Control LOCK DETECTION AND RESTART REG HALL M OUT 1OUT 2 CS „ HALL SIGNAL INPUT-OUTPUT TRUTH TABLE H+ H- OUT1 OUT2 HO H L H L H L H L H L Condition: LD=0V

F6908 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 3 www.unisonic.com.tw Q W - R 1 0 9 - 0 1 6 . B „ ABSOLUTE MAXIMUM RATINGS (Ta=25℃) PARAMETER SYMBOL RATINGS UNIT Supply Voltage V CC 15 V Output Voltage V OUT 15 V Hall Signal Output Voltage V HO 15 V Output Current I OUT 0.7* A Hall Signal Output Current I HO 15 mA Power Dissipation P D 680 ** mW Operating Temperature T OPR -40 ~ +100 ℃ Junction Temperature T J +125 ℃ Storage Temperature T STG -40 ~ +150 ℃ * This value is not to be over PD and ASO. The device is guaranteed to meet performance specification within 0℃ ~ 70℃ operating temperature range and assured by design from –40℃ ~ 100℃, characteristic and correlation with static process control. „ RECOMMENDED OPERATING CONDITIONS (Ta=25℃) PARAMETER SYMBOL RATINGS UNIT Supply Voltage V CC 3 ~ 14 V „ ELECTRICAL CHARACTERISTICS (Unless otherwise specified Ta = 25℃, Vcc = 5V) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Clamp Voltage of Capacitor for Lock Detection VLDCL 1.14 1.80 2.47 V Reference Voltage of Capacitor for Lock Detection VLDCP 0.47 0.76 1.06 V Output Voltage L V OL I OUT=200mA 0.2 0.3 V Output Voltage H V OH I OUT=200mA 3.9 4.1 V “HO” Terminal Voltage L V HOL I HO=5mA 0.3 0.5 V Supply Current Icc At out put: OFF 1.5 3.4 8.7 mA Charge Current of Capacitor for Lock Detection ILDC V LD=1.1V 1.50 2.75 4.50 µA Discharge Current of Capacitor for Lock Detection ILDD V LD=1.1V 0.24 0.48 0.90 µA “HO” Terminal Leak Current I HOL V HO=15V 0 50 µA Charge-Discharge Current Ratio of Capacitor for Lock Detection RCD r CD=ILDC/ILDD 4.2 5.7 9.5 Hall Input Offset Voltage H OFS -10 10 mV Hall Input-Output Gain GHO 320 500 680 Thermal Shutdown 140 ℃ TSD Hysteresis TSD 25 ℃

F6908 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 4 www.unisonic.com.tw Q W - R 1 0 9 - 0 1 6 . B „ POWER DERATING CURE 1000 800 600 400 200 0 25 50 75 85 100 125 150 687 PD (mW) Ta (℃) To use at temperature above Ta =25℃ reduce 5.5mW/℃ (On 70.0mm×70.0mm×1.6mm glass epoxy board ) „ LOCK DETECT CIRCUIT, AUTOMATIC RESTART CIRCUIT Charge and discharge time at motor lock condition varies with the value of external capacitor at LD terminal, and is given by the following equation. C × ( V LDCL-VLDCP) T ON (Charge time) = I LDC C × ( V LDCL-VLDCP) TOFF (Discharge time)= I LDD C: Capacitor at LD pin The following value shows charge time and discharge time at C=0.47 µF for reference. Charge time =0.18S (Output: ON) Discharge time = 1.02S (Output: OFF)

F6908 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 5 www.unisonic.com.tw Q W - R 1 0 9 - 0 1 6 . B „ SHOWS TIMING CHART OF LD PIN TOFF TON ONOutput Tr OFF Depend on the hall output Motor lock lock Detect Lock cancel Reset ordinary motion HO LD VLDCP VLDCL OUT1 Fig.1 Timing chart (LD terminal , HO terminal) „ CAUTIONS (1) Power dissipation IC power dissipation varies widely with supply voltage, output current and application of IC. Please pay attention not to exceed the allowable power rating. (2) Hall signal input terminals (H+、H-) VCC VCC-2V 1/2 VCC GND Fig.2 Hall amp input bias voltage range Hall Amp input bias voltage range

F6908 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 6 www.unisonic.com.tw Q W - R 1 0 9 - 0 1 6 . B A. Hall signal amplitude should be key within range 0V ~ VCC-2V. B. The output signal of this IC is the amplified by about 500 times of ha ll input signal coith pattern shown below for different leuel ok signal input. (H+)-(H-) Fig.3 Difference of output signal depending on hall input signal OUT1 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 lif e support appliances, devices or systems where malfunction of these products can be reasonably expe cted to result in personal injury. Reproduction in whole or in part is prohibited without the prior writ ten 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.