www.fairchildsemi.com KA3082 Bi-Directional DC Motor Driver Features Description • Built-in Brake Function for Stable Brake Characteristics. • Built-in Element to Absorb a Surge Current Derived From Changing Motor Direction and Braking Motor Drive. • Motor Speed Control by an External Voltage. • Stable Motor Direction Change. • Interfaces With CMOS Devices. • Built-in the Thermal Shut Down Circuit (165°C). • Low Standby Current. (6.5mA) The KA3082 is a monolithic integrated circuit designed for driving bi-directional DC motor with braking and speed control, and it is suitable for the loading motor driver of VCR, CDP, and TOY systems. The speed control can be achieved by adjusting the external voltage of the speed control pin. It has two pins of logic inputs for controlling the forward/ reverse and braking. 10-SIP Target Applications • Video Cassette Recorder (VCR) Loading Motor • Low Current DC Motor Such as Audio or Video Equipment. • General DC Motor Ordering Information Device Package Operating Temp. KA3082B 10-SIP -25°C ~ +75°C Rev. 1.0.2 ©2002 Fairchild Semiconductor Corporation KA3082 Pin Assignments KA3082 GND VO1 VZ1 1 2 3 VCTL VIN1 4 5 VIN2 SVCC 6 7 PVCC 8 VZ2 VO2 9 10 Pin Definitions Pin Number Pin Name I/O Pin Function Description 1 GND - 2 VO1 O Output 1 3 VZ1 - Phase Compensation 4 VCTL I Motor Speed Control 5 VIN1 I Input 1 6 VIN2 I Input 2 Ground 7 SVCC - Supply Voltage (Signal) 8 PVCC - Supply Voltage (Power) 9 VZ2 - Phase Compensation 10 VO2 O Output 2 Internal Block Diagram DRIVER OUT BIAS PRE DRIVER 1 GND 2 LOGIC SWITCH 2 VO1 3 VZ1 4 VCTL 5 VIN1 6 VIN2 TSD 7 SVCC 8 PVCC 9 10 VZ2 VO2 KA3082 Equivalent Circuits Description Pin No. Internal Circuit Vcc Vcc Output 2, 10 2 10 VCC Phase Compensation 3 3, 9 50Ω 9 Vcc Vcc VCC Speed Control 4 4 3 KA3082 Equivalent Circuit (Continued) Description Pin No. Internal Circuit Vcc VCC Input 5, 6 5 6 7 SVCC PVCC 4 7 8 8 VCC Vcc KA3082 Absolute Maximum Ratings (Ta=25°°C) Parameter Symbol Value Unit Remark Supply Voltage VCCmax 18 V - note1 A - Pd 1.2note2 W - Operating Temperature TOPR -25 ~ +75 °C - Storage Temperature TSTG -55 ~ +125 °C - Maxium Output Current 1.6 IOmax Power Dissipation Note: 1. Duty 1 / 100, pulse width 500µs 2. 1) When mounted on glass epoxy PCB (76.2 × 114 × 1.57mm) 2) Power dissipation reduces 9.6mV / °C for using above Ta=25°C. 3) Do not exceed Pd and SOA(Safe Operating Area). Power Dissipation Curve Pd (mW) 1, 200 SOA 0 0 25 50 75 100 150 15 125 Ambient temperature, Ta [°C] Recommened Operating Conditions (Ta=25°°C) Parameter Operating Supply Voltage Symbol Operating voltage range Unit SVCC,PVCC 7 ~ 18 V Note: Caution 1) PVCC ≤ SVCC Caution 2) When PVCC is above 16V, the VCTL must be opened or 8.5 ≤ VCTL ≤ PVCC 5 KA3082 Electrical Characteristics (Ta=25°°C, VCC=SVCC=PVCC=12V) Parameter Conditions Min. Typ. Max. Unit Quiescent Current ICC2 Pin5 & 6: GND, RL=∞ 4 6.5 9.5 mA Min. Input-on Current 1 IIN1 RL=∞, pin5=IIN1, pin6=L - 10 30 µA Min. Input-on Current 2 IIN2 RL=∞, pin5=L, pin6=IIN - 10 30 µA Input Threshold Voltage 1 VITH1 RL=∞, pin5=VIN, pin6=L 1.0 1.3 1.6 V Input Threshold Voltage 2 VITH2 RL=∞, pin5=L, pin6=VIN 1.0 1.3 1.6 V Output Leakage Current 1 IOL1 RL=∞, pin5 & 6=GND - 0.01 1 mA Output Leakage Current 2 IOL2 RL=∞, pin5 & 6=GND - 0.01 1 mA Zener Current 1 IZ1 RL=∞, pin5=H, pin6=L - 0.85 1.5 mA Zener Current 2 IZ2 RL=∞, pin5=L, pin6=H - 0.85 1.5 mA Output Voltage 1 VO1 RL=60Ω, pin5=H, pin6=L 6.6 7.2 7.6 V VO2 RL=60Ω, pin5=L, pin6=H 6.6 7.2 7.6 V Saturation Voltage 1 (Upper) V SAT1 IO=300mA - 1.9 2.3 V Saturation Voltage 2 (Upper) VSAT2 IO=500mA - 1.9 2.3 V Saturation Voltage 1 (Lower) VSAT3 IO=300mA - 0.25 0.5 V Saturation Voltage 2 (Lower) VSAT4 IO=500mA - 0.4 0.65 V Output Voltage 2 6 Symbol KA3082 Application Information 1. Thermal Shut Down Circuit I Q1 V1 R1 Q2 Q3 V2 R2 When Ta = 25°C, Q2 & Q3 are Turn-off and output stage operate normally. V1 = I × (R1 + R2) V2 = R2 / (R1 + R2) × V1 = 0.37V When Ta = 165°C, Q2 & Q3 become Turn-on and it turn-off the output stage. 0.70V - 0.37V = 330mV (When Q2 & Q3 are Turn-on, VbeQ2 = VbeQ3 = 0.70V) And temperature coefficient of Q2 = Q3 = −2mV/°C ∴ T.S.D: 330mV / 2mV = 165°C 2. Logic Input & Output Table Input Output Motor Pin #5 Pin #6 Pin #2 Pin #10 Low Low Low Low High Low High Low Forward Low High Low High Reverse High High Low Low Brake Brake Input High is above 2.0V. Input Low is below 0.7V. 7 KA3082 3. Logic Switch Circuit SVCC V2 V1 5 6 Q4 Q7 Q6 Q5 4 VCTL 7.4V This circuit define reference voltage of output. When pin #5 is “H” and pin #6 is “L”, - V1 = VZD + VBEQ4 + VBEQ5 ·=· 8.9V - V2 = VBEQ 7 + VSATQ6 ·=· 0.87V V1 and V2 are related with the output voltage of the motor and change according to the voltage of pin #4 (VCTL). 4. Drive Output Circuit PVCC V1 Q5 Q2 RL R1 VO1 8 R2 M Q3 V1 = 8.9V V2 = 0.87V VO1 = V1 - VBEQ1 - VBEQ2 VO2 = VQ6SAT VO = VO1 - VO2 = V1 - VBEQ1 - VBEQ2 - VQ6SAT IRL = (VO1 - VO2) / RL V2 Q4 Q1 VO2 Q6 KA3082 Typical Performance Characteristics CHARACTERISTIC GRAPHS 2. Temperature vs ICC 1. VCC vs ICC 10 9 8 7 6 5 4 3 2 1 0 -35 ICC(mA) ICC(mA) 10 9 8 7 6 5 4 3 2 1 0 VIN = 0V 0 2 4 6 8 10 12 VCC(V) 14 16 18 20 3. VCTL vs. Vo 10 VO (V) VO (V) 8 6 4 VCC = 12V VIN = 5V/0V RL = 60Ω 2 0 2 4 6 VCTL(V) 8 10 12 5. IO vs. VSAT(UPPER) 2.0 VSAT (V) VSAT (V) 2.5 1.5 1.0 VCC = 12V VCTL = ope VIN = 5V/0V 0.5 0.0 0.4 5 25 45 Temp.(° C) 65 85 0.6 0.8 IO(A) 7.7 7.6 7.5 7.4 7.3 7.2 7.1 7.0 6.9 6.8 6.7 6.6 6.5 -35 VCC = 12V VCTL = 7.4V VIN = 5V/0V RL = 60Ω -15 5 25 45 Temp.(° C) 65 85 5. IO vs. VSAT(LOWER) 3.0 0.2 -15 4. Temperature vs. Vo 12 0 VCC = 12V VIN = 0V 1.0 1.2 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 VCC = 12V VCTL = open VIN = 5V/0V 0.2 0.4 0.6 0.8 1.0 1.2 IO(A) 9 KA3082 Test Circuits KA3082 GND VO1 1 2 VZ1 VCTL 3 VIN1 VIN2 4 5 SVCC PVCC 6 7 8 VZ2 VO2 9 10 CD 0.1µF A S4 S3 S1 S2 A S5 A A VCC ZD 7.4V VIN Typical Application Circuits KA3082 GND 1 VO1 2 VZ1 3 VCTL 4 VIN1 VIN2 5 6 SVCC PVCC VZ2 7 8 9 VO2 10 10 VCC 0.1µ M 10 KA3082 11 KA3082 DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com 9/6/02 0.0m 001 Stock#DSxxxxxxxx 2002 Fairchild Semiconductor Corporation