KA8301L - Fairchild Semiconductor

www.fairchildsemi.com

Rev. 1.0.1

February. 2000.

Features

• Built-in brake function.

• Built-in element to absorb a surge current derived from

changing motor direction and braking motor d riv e.

• External motor speed control pin

• Moto r di r ecti o n ch a nge cir cui t .

• Interfaces with CMOS devices.

Description

The KA8301 is a monolithic integrated circuit designed for

driving bi-directional DC motor with braking and speed con-

trol, 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

• Video cassette recorder (VCR) loading motor

• Low current DC motor such audio or video equipment

• General DC motor

Ordering Information

Device Package Operating Temp.

KA8301-L 10-SIPH-B −25°C ~ +75°C

KA8301

Bi-Directional DC Motor Driver

KA8301

Pin Assignments

Pin Definitions

Pin Number Pin Name I/O Pin Function Descript ion

1 GND - Ground

OUT1 O Output 1

Z1 - Phase compensation

RI Motor speed control

IN I Input 1

IN I Input 2

CC1 - Supply voltage (Signal)

CC2 I Supply voltage (Power)

Z2 I Phase compensation

10 VOUT2 O Output 2

12345678910

GND VOUT1 VZ1 VRFIN RIN VCC1 VOUT2

VCC2 VZ2

KA8301

Internal Block Diagram

12345678910

GND VOUT1 VZ1 VRFIN RIN VCC1 VCC2 VZ2 VOUT2

LOGIC

PRE-DRIVER

DRIVER

KA8301

Equival ent Cir cuits

Description Pin No. Internal circuit

Output 2, 10

Phase

compensation 3, 9

Speed control 4

Vcc

VCC

Vcc

KA8301

Equival ent Cir cuit (Continu ed)

Description Pin No. Internal circuit

Input 5, 6

VCC1

VCC2 7

GND 1

VCC

Vcc

KA8301

Absolute Maximum Ratings (Ta=25°

°°

°C)

Notes:

1. Duty 1/100, pulse width 500µs

2. 1) When mounted on glass epoxy PCB (76.2 × 114 × 1.57mm)

2) P ower dissipat ion reduces 120m W / °C for using above Ta=25°C

3) Do not exceed Pd and SOA(Safe Operating Area).

Power Dissipation Curve

Recommened Operating Conditions (Ta=25°

°°

°C)

Parameter Symbol Value Unit

Supply voltage VCCmax 18 V

Maximum output current IOmax 1.6note1 A

Power dissipation Pd15note2 W

Input voltage VIN −0.3 ~ VCC V

Operating temperature TOPR −25 ~ +75 °C

Storage temperature TSTG −55 ~ +150 °C

Parameter Symbol Value Unit

Operating supply voltage VCC 8 ~ 18 V

00 25 50 75 100 125 150 175

Pd (W)

Ambient temperature, Ta [°C]

SOA

KA8301

Electrical Characteristics (Ta=25°

°°

°C, Vcc=12V)

Parameter Symbol Conditions Min. Typ. Max. Units

Quiescent current IQPin5 & 6: GND, RL=∞35.520mA

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 -1050µA

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

Output voltage 2 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

KA8301

Applica tion Informati on

1. FORWARD AND REVERSE CONTROL LOG I C

• If pin #5= H , pin #6=L, load current flows from pi n #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 RESTRIC TING CIRCUIT

If a high voltage generated during reversing operation is applied across pin #2 and pin #10, an internal comparator activates

the rush current restric t ing circuit.

3. DRIVE CIRCUIT

In the forward mode , the drive cir cuit supp lies 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)

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

KA8301

Typical Performa nce Characteristics

KA8301

Typical Performance Characteristics (Continued)

KA8301

Typical Performance Characteristics (Continued)

KA8301

Test Circuits

Typical Application Circuits

123456 78910

KA8301

GND VOUT1 VZ1 VRFIN RIN VCC1 VCC2 VZ2 VOUT2

VCC

7.4V VIN

10Ω

0.1µF

910

KA8301

GND VOUT1 VZ1 VRFIN RIN VCC1 VCC2 VZ2 VOUT2

1 2 3 4 5 6 7 8

0.1µ

VCC

KA8301

12/1/00 0.0m 001

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