MELEXIS MLX10402CDF Datasheet

MLX10402

Motor Driver IC

MLX10402 Page 1 12/Oct/01
3901010402 Rev. 002

Features and Benefits

• Small package (SOIC16)

• Current limitation

• Low power consumption

• Thermal Overload protection

• Microcontroller compatible

Applications

• Small DC inductive motor driver

• Lamp driver

Ordering Information

Part No. Temperature Suffix Package Temperature Range
MLX10402 C DF (SOIC 16) ± 0°C to 70°C

Functional Diagram

CONTROL

CIRCUIT

VCC

VDD

IN1

IN2

M1

M2

TEMPERATURE

PROTECTION

AUTO

OVERTEMP

10402 Motor Driver IC

Description

The IC drives directly small DC inductive or active
loads like electric motors, lamps, etc. There are four
main driving modes. These are set by digital inputs
“In1” and “In2” :

IN1 IN2 M1 M2 Driving Mode
1 0 1 0 Forward
0 1 0 1 Reverse
1 1 0 0 Brake (Motor shorted)
0 0 Z Z Off (Motor disabled)

The current of the output-drivers is limited for all
kinds of overload- and short-circuit conditions and in
the whole supply voltage- and temperature range.

The outputs “M1” and “M2” need to be off-chip
protected with against motor inductances by
standard Si-diodes.

If the temperature of the chip exceeds a certain
value (changable with pin “Auto”), the temperature­overload protection-circuit disables the outputs,
preventing the chip from being overheated. In
addition, this so called “temp ovl”-state is signaled
with a low level at the “overtemp”-pin.

MLX10402

Motor Driver IC

MLX10402 Page 2 12/Oct/01
3901010402 Rev. 002

Electrical Characteristics

Following characteristics are valid at ± 0°C to 70°C

Characteristics Test Conditions Limits

Min Typ Max Units

Supply voltage Vcc

5 9 12 V

Supply voltage Vdd

4.5 5.0 5.5 V

Mean motor current

Vcc=9V 330 mA
Vcc=6V 300 mA

Motor current limit

Vcc=9V 550 mA
Vcc=6V 500 mA

Brake current

Vcc=9V 240 mA
Vcc=6V 180 mA

Voltage drop at the 2

Vcc=9V, Icc=300mA 1.2 V

output transistors together

Vcc=6V, Icc=260mA 1.2 V

Supply current Icc

FORW, REVERSE,

BRAKE, TEMP OVL

5.0 mA

OFF mode 10.0 µA

Supply current Idd

FORW, REVERSE,

BRAKE, TEMP OVL

1.0 mA

OFF mode 10.0 µA

Inputs “In1” & “In2”

Logic level TTL,

1.4 V

Input “Auto”

(Pull up)

Current sourced

(if tied to GND)

25 uA

Output “overtemp”

TEMP OK output HiZ

(Open DRAIN)

TEMP OVL output

@1mA sink

0.4 V

Temperature characteristics

Characteristics Conditions Limits

Min Typ Max Units

TEMP OVL-Protection “Auto” = 1 or floating

122 °C

turn on Temperature “Auto” = 0

155 °C

TEMP OVL-Protection “Auto” = 1 or floating

93 °C

turn off Temperature “Auto” = 0

105 °C

Absolute Maximum Ratings

Vcc +16V
Maximum Output Current 700mA
Die Temperature +160°C
Storage Temperature -55°C to 125°C