4

Constant Current IC

W2RV005RM

Dimensions

Precautions for Use

■ Correct Use

• The absolute maximum rating is the limit value which should not be

exceeded even in a flash. Exceeding this value can cause deterio-

ration of the characteristics or complete failure of the IC.

• Sufficiently take into consideration the static electricity, chattering

and voltage of the input to be connected when determining each

input terminal. Since unused input terminals may cause an

undefined state in the internal circuit, connect them to a power

supply (voltage = V

• Although the device contains an ESD protection circuit, static elec-

tricity that exceeds the function may damage the device. When

handling the device, exercise due caution by, for example, ground-

ing the human body.

• Due to the structure of the IC, parasitic elements are formed

unavoidably. Exercise due caution not to use the device in a way

that activates the parasitic elements. For example, do not apply a

voltage lower than GND to the input terminals.

• Taking the power dissipation in actual use into consideration, per-

form thermal design with a sufficient margin. When a voltage

applied to the IC is high, which is due to, for example, a small num-

ber of LED’s driven in series, IC heat generation can be controlled

by inserting a resistance and spreading power consumption evenly.

• This IC incorporates a built-in thermal shutdown circuit. If the chip

temperature rises too high, this circuit works and the output termi-

nal becomes an open state. When the chip temperature returns to

a normal range, the output terminal also returns to its original state.

This circuit is a protective function for use at an emergency, so

please do not use it as a regular function.

• Due to potential damage, do not use product that has been

dropped or that has come into contact with water.

■ RoHS Directive Compliance

Models that are indicated as being RoHS compliant are free of the

following six substances.

Lead:

1,000 ppm max.

Mercury:

1,000 ppm max.

Cadmium:

100 ppm max.

Hexavalent chromium:

1,000 ppm max.

PBB:

1,000 ppm max.

PBDE:

1,000 ppm max.

Type

(abbreviation)

(max. 3.25 including BURR)

Lot No.

Index mark

(0.475)

(Unit : mm)

0.08

2.9 ± 0.1

0.65 ± 0.1

0.22

+0.05

-0.04

4º

+6º

-4º

0.145

+0.05

-0.03

S

S

1

4

8

5

2.62

0.99

Recommended

PCB Layout