www.fairchildsemi.com KA8301 Bi-Directional DC Motor Driver Features Description • Built-in brake function. • Built-in element to absorb a surge current derived from changing motor direction and braking motor drive. • External motor speed control pin • Motor direction change circuit. • Interfaces with CMOS devices. The KA8301 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 systems. The speed control can be achieved by adjusting the external voltage of the speed control pin. 10-SIPH-B Typical Application Ordering Information • Video cassette recorder (VCR) loading motor • Low current DC motor such audio or video equipment • General DC motor Device Package Operating Temp. KA8301-L 10-SIPH-B −25°C ~ +75°C Rev. 1.0.1 February. 2000. ©2000 Fairchild Semiconductor International 1 KA8301 Pin Assignments KA8301 GND 1 VOUT1 2 VZ1 VR FIN RIN VCC1 VCC2 VZ2 VOUT2 3 4 5 6 7 8 9 10 Pin Definitions Pin Number Pin Name I/O Pin Function Description 1 GND - Ground 2 VOUT1 O Output 1 3 VZ1 - Phase compensation 4 VR I Motor speed control 5 FIN I Input 1 6 RIN I Input 2 7 VCC1 - Supply voltage (Signal) 8 VCC2 I Supply voltage (Power) 9 VZ2 I Phase compensation 10 VOUT2 O Output 2 2 KA8301 Internal Block Diagram DRIVER LOGIC PRE-DRIVER 1 GND 2 VOUT1 3 4 5 6 7 VZ1 VR FIN RIN VCC1 3 8 VCC2 9 VZ2 10 VOUT2 KA8301 Equivalent Circuits Description Pin No. Output 2, 10 Internal circuit Vcc Vcc 2 10 Phase compensation 3, 9 3 9 Speed control 4 Vcc VCC 4 4 Vcc KA8301 Equivalent Circuit (Continued) Description Pin No. Input 5, 6 Internal circuit Vcc VCC 5 6 VCC1 VCC2 7 8 GND 1 5 Vcc KA8301 Absolute Maximum Ratings (Ta=25°°C) Parameter Symbol Value Unit Supply voltage VCCmax 18 V Maximum output current 1.6 IOmax note1 A Power dissipation Pd 15note2 W Input voltage VIN −0.3 ~ VCC V Operating temperature TOPR −25 ~ +75 °C Storage temperature TSTG −55 ~ +150 °C Notes: 1. Duty 1/100, pulse width 500µs 2. 1) When mounted on glass epoxy PCB (76.2 × 114 × 1.57mm) 2) Power dissipation reduces 120mW / °C for using above Ta=25°C 3) Do not exceed Pd and SOA(Safe Operating Area). Power Dissipation Curve Pd (W) 20 15 SOA 0 0 25 50 75 100 125 150 175 Ambient temperature, Ta [°C] Recommened Operating Conditions (Ta=25°°C) Parameter Operating supply voltage Symbol Value Unit VCC 8 ~ 18 V 6 KA8301 Electrical Characteristics (Ta=25°°C, Vcc=12V) Parameter Symbol Conditions Min. Typ. Max. Units Pin5 & 6: GND, RL=∞ 3 5.5 20 mA Min. input-on current 1 IIN1 RL=∞, pin5=IIN1, pin6=L - 10 50 µA Min. input-on current 2 IIN2 RL=∞, pin5=L, pin6=IIN2 - 10 50 µA Quiescent current IQ Input threshold voltage 1 VINTH1 RL=∞, pin5=VINTH1, pin6=L 0.7 1.3 2.0 V Input threshold voltage 2 VINTH2 RL=∞, pin5=L, pin6=VINTH2 0.7 1.3 2.0 V Output leakage current 1 IOL1 RL=∞, pin5 & 6=GND - - 1 mA Output leakage current 2 IOL2 RL=∞, pin5 & 6=GND - - 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 - V VO2 RL=60Ω, pin5=L, pin6=H 6.6 7.1 - V Saturation voltage (Pin10-1) VCE10-1 RL=RC=∞, pin5=H, pin6=L, ISINK=100mA - 0.83 1.5 V Saturation voltage (Pin2-1) VCE2-1 RL=RC=∞, pin5=L, pin6=H, ISINK=100mA - 0.83 1.5 V Saturation voltage (Pin8-2) VCE8-2 RL=RC=∞, pin5=H, pin6=L, ISOURCE=100mA - 0.83 1.5 V Saturation voltage (Pin8-10) VCE8-10 RL=RC=∞, pin5=L, pin6=H, ISOURCE=100mA - 0.83 1.5 V Output voltage 2 7 KA8301 Application Information 1. FORWARD AND REVERSE CONTROL LOGIC Pin #5 Pin #6 Pin #2 Pin #10 Function L (0.7V ↓) L (0.7V ↓) L L Brake L (0.7V ↓) H (2.0V ↑) L H Reverse H (2.0V ↑) L (0.7V ↓) H L Forward H (2.0V ↑) H (2.0V ↑) H H Brake • If pin #5=H, pin #6=L, load current flows from pin #2 to pin #10 through a motor. • If pin #5=L, pin #6=H, load current flows from pin #10 to pin #2 through a motor. • If pin #5=pin #6=L or pin #5=pin #6=H, the KA8301 stops supplying the power to motor while absorbing counter EMF from the motor as a brake. 2. RUSH CURRENT RESTRICTING CIRCUIT If a high voltage generated during reversing operation is applied across pin #2 and pin #10, an internal comparator activates the rush current restricting circuit. 3. DRIVE CIRCUIT In the forward mode, the drive circuit supplies a load current to the motor from pin #2 to pin #10. In the reverse mode, it supplies the current from pin #10 to pin #2. The output voltage (VOUT) applied to the motor is given by the followings; VOUT = VZD − VCE(sat), where VZD: a zener voltage applied to pin #4 If pin #4 is left open, the output voltage is given by the followings; VOUT = VCC1 − VCE(sat, pnp) − 2VF − VCE(sat) 8 KA8301 Typical Performance Characteristics 9 KA8301 Typical Performance Characteristics (Continued) 10 KA8301 Typical Performance Characteristics (Continued) 11 KA8301 Test Circuits KA8301 GND VOUT1 1 2 VZ1 VR FIN 3 4 5 RIN VCC1 VCC2 VZ2 VOUT2 6 7 8 9 10 CD 0.1µF A S4 S3 S7 S1 S2 RC 10Ω A S5 A A S6 VCC ZD 7.4V VIN Typical Application Circuits KA8301 GND VOUT1 1 2 VZ1 VR FIN 3 4 5 RIN VCC1 VCC2 VZ2 6 7 8 9 VOUT2 10 10 VCC 0.1µ M 12